Mercurial > hg
annotate mercurial/wireprotoserver.py @ 37449:a0d71618074f
revlog: detect pseudo file nodeids to raise WdirUnsupported exception
Again, I'm not sure if this is the right thing, but adding a few more pseudo
hashes wouldn't be any worse than the current state.
Differential Revision: https://phab.mercurial-scm.org/D2942
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sun, 25 Mar 2018 18:34:07 +0900 |
parents | 2d965bfeb8f6 |
children | 0b7475ea38cf |
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1 # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net> |
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2 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
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3 # |
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4 # This software may be used and distributed according to the terms of the |
10263 | 5 # GNU General Public License version 2 or any later version. |
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6 |
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7 from __future__ import absolute_import |
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8 |
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9 import contextlib |
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10 import struct |
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11 import sys |
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12 import threading |
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13 |
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14 from .i18n import _ |
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15 from .thirdparty.zope import ( |
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16 interface as zi, |
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17 ) |
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18 from . import ( |
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19 encoding, |
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20 error, |
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21 hook, |
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22 pycompat, |
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23 util, |
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24 wireproto, |
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25 wireprotoframing, |
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26 wireprototypes, |
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27 ) |
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28 from .utils import ( |
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29 procutil, |
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30 ) |
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31 |
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32 stringio = util.stringio |
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33 |
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34 urlerr = util.urlerr |
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35 urlreq = util.urlreq |
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36 |
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37 HTTP_OK = 200 |
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38 |
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39 HGTYPE = 'application/mercurial-0.1' |
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40 HGTYPE2 = 'application/mercurial-0.2' |
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41 HGERRTYPE = 'application/hg-error' |
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42 FRAMINGTYPE = b'application/mercurial-exp-framing-0003' |
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43 |
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44 HTTPV2 = wireprototypes.HTTPV2 |
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45 SSHV1 = wireprototypes.SSHV1 |
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46 SSHV2 = wireprototypes.SSHV2 |
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47 |
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48 def decodevaluefromheaders(req, headerprefix): |
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49 """Decode a long value from multiple HTTP request headers. |
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50 |
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51 Returns the value as a bytes, not a str. |
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52 """ |
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53 chunks = [] |
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54 i = 1 |
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55 while True: |
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56 v = req.headers.get(b'%s-%d' % (headerprefix, i)) |
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57 if v is None: |
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58 break |
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59 chunks.append(pycompat.bytesurl(v)) |
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60 i += 1 |
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61 |
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62 return ''.join(chunks) |
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63 |
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64 @zi.implementer(wireprototypes.baseprotocolhandler) |
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65 class httpv1protocolhandler(object): |
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66 def __init__(self, req, ui, checkperm): |
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67 self._req = req |
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68 self._ui = ui |
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69 self._checkperm = checkperm |
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70 self._protocaps = None |
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71 |
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72 @property |
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73 def name(self): |
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74 return 'http-v1' |
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75 |
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76 def getargs(self, args): |
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77 knownargs = self._args() |
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78 data = {} |
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79 keys = args.split() |
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80 for k in keys: |
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81 if k == '*': |
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82 star = {} |
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83 for key in knownargs.keys(): |
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84 if key != 'cmd' and key not in keys: |
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85 star[key] = knownargs[key][0] |
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86 data['*'] = star |
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87 else: |
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88 data[k] = knownargs[k][0] |
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89 return [data[k] for k in keys] |
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90 |
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91 def _args(self): |
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92 args = self._req.qsparams.asdictoflists() |
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93 postlen = int(self._req.headers.get(b'X-HgArgs-Post', 0)) |
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94 if postlen: |
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95 args.update(urlreq.parseqs( |
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96 self._req.bodyfh.read(postlen), keep_blank_values=True)) |
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97 return args |
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98 |
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99 argvalue = decodevaluefromheaders(self._req, b'X-HgArg') |
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100 args.update(urlreq.parseqs(argvalue, keep_blank_values=True)) |
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101 return args |
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102 |
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103 def getprotocaps(self): |
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104 if self._protocaps is None: |
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105 value = decodevaluefromheaders(self._req, r'X-HgProto') |
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106 self._protocaps = set(value.split(' ')) |
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107 return self._protocaps |
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108 |
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109 def getpayload(self): |
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110 # Existing clients *always* send Content-Length. |
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111 length = int(self._req.headers[b'Content-Length']) |
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112 |
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113 # If httppostargs is used, we need to read Content-Length |
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114 # minus the amount that was consumed by args. |
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115 length -= int(self._req.headers.get(b'X-HgArgs-Post', 0)) |
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116 return util.filechunkiter(self._req.bodyfh, limit=length) |
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117 |
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118 @contextlib.contextmanager |
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119 def mayberedirectstdio(self): |
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120 oldout = self._ui.fout |
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121 olderr = self._ui.ferr |
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122 |
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123 out = util.stringio() |
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124 |
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125 try: |
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126 self._ui.fout = out |
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127 self._ui.ferr = out |
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128 yield out |
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129 finally: |
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130 self._ui.fout = oldout |
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131 self._ui.ferr = olderr |
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132 |
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133 def client(self): |
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134 return 'remote:%s:%s:%s' % ( |
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135 self._req.urlscheme, |
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136 urlreq.quote(self._req.remotehost or ''), |
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137 urlreq.quote(self._req.remoteuser or '')) |
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138 |
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139 def addcapabilities(self, repo, caps): |
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140 caps.append(b'batch') |
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141 |
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142 caps.append('httpheader=%d' % |
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143 repo.ui.configint('server', 'maxhttpheaderlen')) |
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144 if repo.ui.configbool('experimental', 'httppostargs'): |
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145 caps.append('httppostargs') |
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146 |
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147 # FUTURE advertise 0.2rx once support is implemented |
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148 # FUTURE advertise minrx and mintx after consulting config option |
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149 caps.append('httpmediatype=0.1rx,0.1tx,0.2tx') |
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150 |
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151 compengines = wireproto.supportedcompengines(repo.ui, util.SERVERROLE) |
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152 if compengines: |
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153 comptypes = ','.join(urlreq.quote(e.wireprotosupport().name) |
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154 for e in compengines) |
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155 caps.append('compression=%s' % comptypes) |
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156 |
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157 return caps |
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158 |
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159 def checkperm(self, perm): |
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160 return self._checkperm(perm) |
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161 |
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162 # This method exists mostly so that extensions like remotefilelog can |
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163 # disable a kludgey legacy method only over http. As of early 2018, |
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164 # there are no other known users, so with any luck we can discard this |
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165 # hook if remotefilelog becomes a first-party extension. |
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166 def iscmd(cmd): |
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167 return cmd in wireproto.commands |
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168 |
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169 def handlewsgirequest(rctx, req, res, checkperm): |
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170 """Possibly process a wire protocol request. |
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171 |
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172 If the current request is a wire protocol request, the request is |
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173 processed by this function. |
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174 |
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175 ``req`` is a ``parsedrequest`` instance. |
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176 ``res`` is a ``wsgiresponse`` instance. |
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177 |
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178 Returns a bool indicating if the request was serviced. If set, the caller |
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179 should stop processing the request, as a response has already been issued. |
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180 """ |
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181 # Avoid cycle involving hg module. |
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182 from .hgweb import common as hgwebcommon |
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183 |
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184 repo = rctx.repo |
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185 |
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186 # HTTP version 1 wire protocol requests are denoted by a "cmd" query |
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187 # string parameter. If it isn't present, this isn't a wire protocol |
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188 # request. |
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189 if 'cmd' not in req.qsparams: |
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190 return False |
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191 |
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192 cmd = req.qsparams['cmd'] |
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193 |
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194 # The "cmd" request parameter is used by both the wire protocol and hgweb. |
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195 # While not all wire protocol commands are available for all transports, |
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196 # if we see a "cmd" value that resembles a known wire protocol command, we |
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197 # route it to a protocol handler. This is better than routing possible |
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198 # wire protocol requests to hgweb because it prevents hgweb from using |
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199 # known wire protocol commands and it is less confusing for machine |
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200 # clients. |
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201 if not iscmd(cmd): |
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202 return False |
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203 |
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204 # The "cmd" query string argument is only valid on the root path of the |
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205 # repo. e.g. ``/?cmd=foo``, ``/repo?cmd=foo``. URL paths within the repo |
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206 # like ``/blah?cmd=foo`` are not allowed. So don't recognize the request |
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207 # in this case. We send an HTTP 404 for backwards compatibility reasons. |
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208 if req.dispatchpath: |
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209 res.status = hgwebcommon.statusmessage(404) |
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210 res.headers['Content-Type'] = HGTYPE |
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211 # TODO This is not a good response to issue for this request. This |
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212 # is mostly for BC for now. |
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213 res.setbodybytes('0\n%s\n' % b'Not Found') |
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214 return True |
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215 |
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216 proto = httpv1protocolhandler(req, repo.ui, |
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217 lambda perm: checkperm(rctx, req, perm)) |
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218 |
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219 # The permissions checker should be the only thing that can raise an |
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220 # ErrorResponse. It is kind of a layer violation to catch an hgweb |
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221 # exception here. So consider refactoring into a exception type that |
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222 # is associated with the wire protocol. |
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223 try: |
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224 _callhttp(repo, req, res, proto, cmd) |
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225 except hgwebcommon.ErrorResponse as e: |
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226 for k, v in e.headers: |
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227 res.headers[k] = v |
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228 res.status = hgwebcommon.statusmessage(e.code, pycompat.bytestr(e)) |
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229 # TODO This response body assumes the failed command was |
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230 # "unbundle." That assumption is not always valid. |
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231 res.setbodybytes('0\n%s\n' % pycompat.bytestr(e)) |
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232 |
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233 return True |
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234 |
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235 def handlewsgiapirequest(rctx, req, res, checkperm): |
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236 """Handle requests to /api/*.""" |
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237 assert req.dispatchparts[0] == b'api' |
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238 |
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239 repo = rctx.repo |
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240 |
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241 # This whole URL space is experimental for now. But we want to |
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242 # reserve the URL space. So, 404 all URLs if the feature isn't enabled. |
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243 if not repo.ui.configbool('experimental', 'web.apiserver'): |
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244 res.status = b'404 Not Found' |
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245 res.headers[b'Content-Type'] = b'text/plain' |
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246 res.setbodybytes(_('Experimental API server endpoint not enabled')) |
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247 return |
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248 |
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249 # The URL space is /api/<protocol>/*. The structure of URLs under varies |
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250 # by <protocol>. |
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251 |
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252 # Registered APIs are made available via config options of the name of |
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253 # the protocol. |
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254 availableapis = set() |
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255 for k, v in API_HANDLERS.items(): |
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256 section, option = v['config'] |
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257 if repo.ui.configbool(section, option): |
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258 availableapis.add(k) |
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259 |
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260 # Requests to /api/ list available APIs. |
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261 if req.dispatchparts == [b'api']: |
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262 res.status = b'200 OK' |
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263 res.headers[b'Content-Type'] = b'text/plain' |
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264 lines = [_('APIs can be accessed at /api/<name>, where <name> can be ' |
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265 'one of the following:\n')] |
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266 if availableapis: |
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267 lines.extend(sorted(availableapis)) |
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268 else: |
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269 lines.append(_('(no available APIs)\n')) |
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270 res.setbodybytes(b'\n'.join(lines)) |
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271 return |
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272 |
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273 proto = req.dispatchparts[1] |
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274 |
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275 if proto not in API_HANDLERS: |
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276 res.status = b'404 Not Found' |
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277 res.headers[b'Content-Type'] = b'text/plain' |
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278 res.setbodybytes(_('Unknown API: %s\nKnown APIs: %s') % ( |
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279 proto, b', '.join(sorted(availableapis)))) |
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280 return |
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281 |
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282 if proto not in availableapis: |
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283 res.status = b'404 Not Found' |
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284 res.headers[b'Content-Type'] = b'text/plain' |
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285 res.setbodybytes(_('API %s not enabled\n') % proto) |
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286 return |
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287 |
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288 API_HANDLERS[proto]['handler'](rctx, req, res, checkperm, |
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289 req.dispatchparts[2:]) |
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290 |
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291 def _handlehttpv2request(rctx, req, res, checkperm, urlparts): |
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292 from .hgweb import common as hgwebcommon |
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293 |
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294 # URL space looks like: <permissions>/<command>, where <permission> can |
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295 # be ``ro`` or ``rw`` to signal read-only or read-write, respectively. |
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296 |
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297 # Root URL does nothing meaningful... yet. |
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298 if not urlparts: |
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299 res.status = b'200 OK' |
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300 res.headers[b'Content-Type'] = b'text/plain' |
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301 res.setbodybytes(_('HTTP version 2 API handler')) |
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302 return |
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303 |
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304 if len(urlparts) == 1: |
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305 res.status = b'404 Not Found' |
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306 res.headers[b'Content-Type'] = b'text/plain' |
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307 res.setbodybytes(_('do not know how to process %s\n') % |
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308 req.dispatchpath) |
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309 return |
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310 |
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311 permission, command = urlparts[0:2] |
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312 |
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313 if permission not in (b'ro', b'rw'): |
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314 res.status = b'404 Not Found' |
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315 res.headers[b'Content-Type'] = b'text/plain' |
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316 res.setbodybytes(_('unknown permission: %s') % permission) |
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317 return |
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318 |
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319 if req.method != 'POST': |
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320 res.status = b'405 Method Not Allowed' |
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321 res.headers[b'Allow'] = b'POST' |
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322 res.setbodybytes(_('commands require POST requests')) |
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323 return |
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324 |
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325 # At some point we'll want to use our own API instead of recycling the |
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326 # behavior of version 1 of the wire protocol... |
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327 # TODO return reasonable responses - not responses that overload the |
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328 # HTTP status line message for error reporting. |
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329 try: |
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330 checkperm(rctx, req, 'pull' if permission == b'ro' else 'push') |
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331 except hgwebcommon.ErrorResponse as e: |
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332 res.status = hgwebcommon.statusmessage(e.code, pycompat.bytestr(e)) |
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333 for k, v in e.headers: |
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334 res.headers[k] = v |
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335 res.setbodybytes('permission denied') |
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336 return |
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337 |
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338 # We have a special endpoint to reflect the request back at the client. |
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339 if command == b'debugreflect': |
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340 _processhttpv2reflectrequest(rctx.repo.ui, rctx.repo, req, res) |
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341 return |
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342 |
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343 # Extra commands that we handle that aren't really wire protocol |
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344 # commands. Think extra hard before making this hackery available to |
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345 # extension. |
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346 extracommands = {'multirequest'} |
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347 |
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348 if command not in wireproto.commandsv2 and command not in extracommands: |
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349 res.status = b'404 Not Found' |
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350 res.headers[b'Content-Type'] = b'text/plain' |
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351 res.setbodybytes(_('unknown wire protocol command: %s\n') % command) |
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352 return |
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353 |
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354 repo = rctx.repo |
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355 ui = repo.ui |
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356 |
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357 proto = httpv2protocolhandler(req, ui) |
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358 |
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359 if (not wireproto.commandsv2.commandavailable(command, proto) |
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360 and command not in extracommands): |
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361 res.status = b'404 Not Found' |
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362 res.headers[b'Content-Type'] = b'text/plain' |
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363 res.setbodybytes(_('invalid wire protocol command: %s') % command) |
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364 return |
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365 |
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366 # TODO consider cases where proxies may add additional Accept headers. |
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367 if req.headers.get(b'Accept') != FRAMINGTYPE: |
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368 res.status = b'406 Not Acceptable' |
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369 res.headers[b'Content-Type'] = b'text/plain' |
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370 res.setbodybytes(_('client MUST specify Accept header with value: %s\n') |
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371 % FRAMINGTYPE) |
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372 return |
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373 |
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374 if req.headers.get(b'Content-Type') != FRAMINGTYPE: |
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375 res.status = b'415 Unsupported Media Type' |
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376 # TODO we should send a response with appropriate media type, |
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377 # since client does Accept it. |
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378 res.headers[b'Content-Type'] = b'text/plain' |
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379 res.setbodybytes(_('client MUST send Content-Type header with ' |
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380 'value: %s\n') % FRAMINGTYPE) |
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381 return |
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382 |
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383 _processhttpv2request(ui, repo, req, res, permission, command, proto) |
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384 |
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385 def _processhttpv2reflectrequest(ui, repo, req, res): |
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386 """Reads unified frame protocol request and dumps out state to client. |
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387 |
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388 This special endpoint can be used to help debug the wire protocol. |
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389 |
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390 Instead of routing the request through the normal dispatch mechanism, |
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391 we instead read all frames, decode them, and feed them into our state |
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392 tracker. We then dump the log of all that activity back out to the |
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393 client. |
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394 """ |
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395 import json |
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396 |
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397 # Reflection APIs have a history of being abused, accidentally disclosing |
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398 # sensitive data, etc. So we have a config knob. |
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399 if not ui.configbool('experimental', 'web.api.debugreflect'): |
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400 res.status = b'404 Not Found' |
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401 res.headers[b'Content-Type'] = b'text/plain' |
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402 res.setbodybytes(_('debugreflect service not available')) |
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403 return |
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404 |
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405 # We assume we have a unified framing protocol request body. |
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406 |
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407 reactor = wireprotoframing.serverreactor() |
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408 states = [] |
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409 |
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410 while True: |
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411 frame = wireprotoframing.readframe(req.bodyfh) |
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412 |
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413 if not frame: |
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414 states.append(b'received: <no frame>') |
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415 break |
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416 |
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417 states.append(b'received: %d %d %d %s' % (frame.typeid, frame.flags, |
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418 frame.requestid, |
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419 frame.payload)) |
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420 |
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421 action, meta = reactor.onframerecv(frame) |
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422 states.append(json.dumps((action, meta), sort_keys=True, |
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423 separators=(', ', ': '))) |
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424 |
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425 action, meta = reactor.oninputeof() |
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426 meta['action'] = action |
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427 states.append(json.dumps(meta, sort_keys=True, separators=(', ',': '))) |
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428 |
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429 res.status = b'200 OK' |
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430 res.headers[b'Content-Type'] = b'text/plain' |
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431 res.setbodybytes(b'\n'.join(states)) |
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432 |
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433 def _processhttpv2request(ui, repo, req, res, authedperm, reqcommand, proto): |
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434 """Post-validation handler for HTTPv2 requests. |
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435 |
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436 Called when the HTTP request contains unified frame-based protocol |
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437 frames for evaluation. |
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438 """ |
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439 # TODO Some HTTP clients are full duplex and can receive data before |
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440 # the entire request is transmitted. Figure out a way to indicate support |
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441 # for that so we can opt into full duplex mode. |
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442 reactor = wireprotoframing.serverreactor(deferoutput=True) |
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443 seencommand = False |
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444 |
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445 outstream = reactor.makeoutputstream() |
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446 |
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447 while True: |
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448 frame = wireprotoframing.readframe(req.bodyfh) |
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449 if not frame: |
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450 break |
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451 |
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452 action, meta = reactor.onframerecv(frame) |
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453 |
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454 if action == 'wantframe': |
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455 # Need more data before we can do anything. |
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456 continue |
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457 elif action == 'runcommand': |
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458 sentoutput = _httpv2runcommand(ui, repo, req, res, authedperm, |
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459 reqcommand, reactor, outstream, |
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460 meta, issubsequent=seencommand) |
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461 |
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462 if sentoutput: |
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463 return |
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464 |
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465 seencommand = True |
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466 |
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467 elif action == 'error': |
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468 # TODO define proper error mechanism. |
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469 res.status = b'200 OK' |
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470 res.headers[b'Content-Type'] = b'text/plain' |
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471 res.setbodybytes(meta['message'] + b'\n') |
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472 return |
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473 else: |
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474 raise error.ProgrammingError( |
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475 'unhandled action from frame processor: %s' % action) |
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476 |
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477 action, meta = reactor.oninputeof() |
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478 if action == 'sendframes': |
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479 # We assume we haven't started sending the response yet. If we're |
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480 # wrong, the response type will raise an exception. |
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481 res.status = b'200 OK' |
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482 res.headers[b'Content-Type'] = FRAMINGTYPE |
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483 res.setbodygen(meta['framegen']) |
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484 elif action == 'noop': |
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485 pass |
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486 else: |
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487 raise error.ProgrammingError('unhandled action from frame processor: %s' |
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488 % action) |
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489 |
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490 def _httpv2runcommand(ui, repo, req, res, authedperm, reqcommand, reactor, |
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491 outstream, command, issubsequent): |
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492 """Dispatch a wire protocol command made from HTTPv2 requests. |
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493 |
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494 The authenticated permission (``authedperm``) along with the original |
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495 command from the URL (``reqcommand``) are passed in. |
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496 """ |
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497 # We already validated that the session has permissions to perform the |
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498 # actions in ``authedperm``. In the unified frame protocol, the canonical |
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499 # command to run is expressed in a frame. However, the URL also requested |
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500 # to run a specific command. We need to be careful that the command we |
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501 # run doesn't have permissions requirements greater than what was granted |
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502 # by ``authedperm``. |
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503 # |
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504 # Our rule for this is we only allow one command per HTTP request and |
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505 # that command must match the command in the URL. However, we make |
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506 # an exception for the ``multirequest`` URL. This URL is allowed to |
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507 # execute multiple commands. We double check permissions of each command |
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508 # as it is invoked to ensure there is no privilege escalation. |
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509 # TODO consider allowing multiple commands to regular command URLs |
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510 # iff each command is the same. |
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511 |
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512 proto = httpv2protocolhandler(req, ui, args=command['args']) |
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513 |
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514 if reqcommand == b'multirequest': |
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515 if not wireproto.commandsv2.commandavailable(command['command'], proto): |
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516 # TODO proper error mechanism |
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517 res.status = b'200 OK' |
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518 res.headers[b'Content-Type'] = b'text/plain' |
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519 res.setbodybytes(_('wire protocol command not available: %s') % |
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520 command['command']) |
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521 return True |
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522 |
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523 # TODO don't use assert here, since it may be elided by -O. |
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524 assert authedperm in (b'ro', b'rw') |
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525 wirecommand = wireproto.commandsv2[command['command']] |
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526 assert wirecommand.permission in ('push', 'pull') |
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527 |
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528 if authedperm == b'ro' and wirecommand.permission != 'pull': |
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529 # TODO proper error mechanism |
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530 res.status = b'403 Forbidden' |
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531 res.headers[b'Content-Type'] = b'text/plain' |
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532 res.setbodybytes(_('insufficient permissions to execute ' |
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533 'command: %s') % command['command']) |
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534 return True |
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535 |
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536 # TODO should we also call checkperm() here? Maybe not if we're going |
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537 # to overhaul that API. The granted scope from the URL check should |
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538 # be good enough. |
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539 |
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540 else: |
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541 # Don't allow multiple commands outside of ``multirequest`` URL. |
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542 if issubsequent: |
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543 # TODO proper error mechanism |
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544 res.status = b'200 OK' |
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545 res.headers[b'Content-Type'] = b'text/plain' |
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546 res.setbodybytes(_('multiple commands cannot be issued to this ' |
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547 'URL')) |
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548 return True |
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549 |
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550 if reqcommand != command['command']: |
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551 # TODO define proper error mechanism |
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552 res.status = b'200 OK' |
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553 res.headers[b'Content-Type'] = b'text/plain' |
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554 res.setbodybytes(_('command in frame must match command in URL')) |
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555 return True |
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556 |
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557 rsp = wireproto.dispatch(repo, proto, command['command']) |
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558 |
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559 res.status = b'200 OK' |
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560 res.headers[b'Content-Type'] = FRAMINGTYPE |
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|
561 |
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|
562 if isinstance(rsp, wireprototypes.bytesresponse): |
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|
563 action, meta = reactor.onbytesresponseready(outstream, |
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|
564 command['requestid'], |
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|
565 rsp.data) |
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|
566 else: |
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|
567 action, meta = reactor.onapplicationerror( |
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568 _('unhandled response type from wire proto command')) |
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569 |
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570 if action == 'sendframes': |
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571 res.setbodygen(meta['framegen']) |
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572 return True |
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573 elif action == 'noop': |
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574 return False |
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575 else: |
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576 raise error.ProgrammingError('unhandled event from reactor: %s' % |
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577 action) |
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578 |
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579 # Maps API name to metadata so custom API can be registered. |
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580 API_HANDLERS = { |
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581 HTTPV2: { |
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582 'config': ('experimental', 'web.api.http-v2'), |
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583 'handler': _handlehttpv2request, |
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584 }, |
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585 } |
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586 |
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587 @zi.implementer(wireprototypes.baseprotocolhandler) |
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588 class httpv2protocolhandler(object): |
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589 def __init__(self, req, ui, args=None): |
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590 self._req = req |
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591 self._ui = ui |
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592 self._args = args |
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593 |
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594 @property |
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595 def name(self): |
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596 return HTTPV2 |
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597 |
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598 def getargs(self, args): |
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599 data = {} |
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600 for k in args.split(): |
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601 if k == '*': |
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602 raise NotImplementedError('do not support * args') |
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603 else: |
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604 data[k] = self._args[k] |
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605 |
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606 return [data[k] for k in args.split()] |
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607 |
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608 def getprotocaps(self): |
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609 # Protocol capabilities are currently not implemented for HTTP V2. |
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610 return set() |
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611 |
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612 def getpayload(self): |
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613 raise NotImplementedError |
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614 |
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615 @contextlib.contextmanager |
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616 def mayberedirectstdio(self): |
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617 raise NotImplementedError |
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618 |
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619 def client(self): |
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620 raise NotImplementedError |
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621 |
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622 def addcapabilities(self, repo, caps): |
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623 return caps |
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624 |
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625 def checkperm(self, perm): |
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626 raise NotImplementedError |
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627 |
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628 def _httpresponsetype(ui, proto, prefer_uncompressed): |
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629 """Determine the appropriate response type and compression settings. |
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630 |
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631 Returns a tuple of (mediatype, compengine, engineopts). |
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632 """ |
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633 # Determine the response media type and compression engine based |
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634 # on the request parameters. |
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635 |
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636 if '0.2' in proto.getprotocaps(): |
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637 # All clients are expected to support uncompressed data. |
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|
638 if prefer_uncompressed: |
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639 return HGTYPE2, util._noopengine(), {} |
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640 |
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|
641 # Now find an agreed upon compression format. |
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642 compformats = wireproto.clientcompressionsupport(proto) |
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|
643 for engine in wireproto.supportedcompengines(ui, util.SERVERROLE): |
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644 if engine.wireprotosupport().name in compformats: |
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645 opts = {} |
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646 level = ui.configint('server', '%slevel' % engine.name()) |
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647 if level is not None: |
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648 opts['level'] = level |
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649 |
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|
650 return HGTYPE2, engine, opts |
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651 |
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652 # No mutually supported compression format. Fall back to the |
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653 # legacy protocol. |
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654 |
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655 # Don't allow untrusted settings because disabling compression or |
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656 # setting a very high compression level could lead to flooding |
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657 # the server's network or CPU. |
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658 opts = {'level': ui.configint('server', 'zliblevel')} |
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659 return HGTYPE, util.compengines['zlib'], opts |
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|
660 |
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|
661 def _callhttp(repo, req, res, proto, cmd): |
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662 # Avoid cycle involving hg module. |
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663 from .hgweb import common as hgwebcommon |
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664 |
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|
665 def genversion2(gen, engine, engineopts): |
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666 # application/mercurial-0.2 always sends a payload header |
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667 # identifying the compression engine. |
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668 name = engine.wireprotosupport().name |
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669 assert 0 < len(name) < 256 |
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670 yield struct.pack('B', len(name)) |
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671 yield name |
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672 |
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673 for chunk in gen: |
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674 yield chunk |
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675 |
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676 def setresponse(code, contenttype, bodybytes=None, bodygen=None): |
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677 if code == HTTP_OK: |
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678 res.status = '200 Script output follows' |
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679 else: |
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680 res.status = hgwebcommon.statusmessage(code) |
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681 |
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682 res.headers['Content-Type'] = contenttype |
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683 |
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parents:
36857
diff
changeset
|
684 if bodybytes is not None: |
a88d68dc3ee8
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parents:
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diff
changeset
|
685 res.setbodybytes(bodybytes) |
a88d68dc3ee8
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parents:
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diff
changeset
|
686 if bodygen is not None: |
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
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diff
changeset
|
687 res.setbodygen(bodygen) |
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
36857
diff
changeset
|
688 |
35982
5a56bf4180ad
wireproto: function for testing if wire protocol command is available
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35976
diff
changeset
|
689 if not wireproto.commands.commandavailable(cmd, proto): |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
36857
diff
changeset
|
690 setresponse(HTTP_OK, HGERRTYPE, |
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parents:
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diff
changeset
|
691 _('requested wire protocol command is not available over ' |
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
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diff
changeset
|
692 'HTTP')) |
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parents:
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diff
changeset
|
693 return |
35982
5a56bf4180ad
wireproto: function for testing if wire protocol command is available
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35976
diff
changeset
|
694 |
36801
66de4555cefd
wireproto: formalize permissions checking as part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36800
diff
changeset
|
695 proto.checkperm(wireproto.commands[cmd].permission) |
36799
c638a13093cf
wireprotoserver: check permissions in main dispatch function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36798
diff
changeset
|
696 |
36798
7574c8173d5e
wireprotoserver: check if command available before calling it
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36760
diff
changeset
|
697 rsp = wireproto.dispatch(repo, proto, cmd) |
7574c8173d5e
wireprotoserver: check if command available before calling it
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36760
diff
changeset
|
698 |
34510
c23fa3103925
hgweb: in protocol adapter, look for bytes instances, not str
Augie Fackler <augie@google.com>
parents:
34509
diff
changeset
|
699 if isinstance(rsp, bytes): |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36857
diff
changeset
|
700 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
36074
2f7290555c96
wireproto: introduce type for raw byte responses (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36073
diff
changeset
|
701 elif isinstance(rsp, wireprototypes.bytesresponse): |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
36857
diff
changeset
|
702 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp.data) |
36073
cd6ab329c5c7
wireprototypes: move wire protocol response types to new module
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36072
diff
changeset
|
703 elif isinstance(rsp, wireprototypes.streamreslegacy): |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
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diff
changeset
|
704 setresponse(HTTP_OK, HGTYPE, bodygen=rsp.gen) |
36073
cd6ab329c5c7
wireprototypes: move wire protocol response types to new module
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36072
diff
changeset
|
705 elif isinstance(rsp, wireprototypes.streamres): |
35705
8cdb671dbd0b
wireproto: drop support for reader interface from streamres (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
34744
diff
changeset
|
706 gen = rsp.gen |
30466
2add671bf55b
wireproto: perform chunking and compression at protocol layer (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30366
diff
changeset
|
707 |
30764
e75463e3179f
protocol: send application/mercurial-0.2 responses to capable clients
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30759
diff
changeset
|
708 # This code for compression should not be streamres specific. It |
e75463e3179f
protocol: send application/mercurial-0.2 responses to capable clients
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30759
diff
changeset
|
709 # is here because we only compress streamres at the moment. |
36072
341c886e411e
wireprotoserver: move responsetype() out of http handler
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36071
diff
changeset
|
710 mediatype, engine, engineopts = _httpresponsetype( |
37393
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
711 repo.ui, proto, rsp.prefer_uncompressed) |
35750
a39a9df7ecca
wireproto: split streamres into legacy and modern case
Joerg Sonnenberger <joerg@bec.de>
parents:
35705
diff
changeset
|
712 gen = engine.compressstream(gen, engineopts) |
30466
2add671bf55b
wireproto: perform chunking and compression at protocol layer (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30366
diff
changeset
|
713 |
35750
a39a9df7ecca
wireproto: split streamres into legacy and modern case
Joerg Sonnenberger <joerg@bec.de>
parents:
35705
diff
changeset
|
714 if mediatype == HGTYPE2: |
a39a9df7ecca
wireproto: split streamres into legacy and modern case
Joerg Sonnenberger <joerg@bec.de>
parents:
35705
diff
changeset
|
715 gen = genversion2(gen, engine, engineopts) |
30764
e75463e3179f
protocol: send application/mercurial-0.2 responses to capable clients
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30759
diff
changeset
|
716 |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36857
diff
changeset
|
717 setresponse(HTTP_OK, mediatype, bodygen=gen) |
36073
cd6ab329c5c7
wireprototypes: move wire protocol response types to new module
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36072
diff
changeset
|
718 elif isinstance(rsp, wireprototypes.pushres): |
36067
caca3ac2ac04
wireproto: use maybecapturestdio() for push responses (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36066
diff
changeset
|
719 rsp = '%d\n%s' % (rsp.res, rsp.output) |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
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diff
changeset
|
720 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
36073
cd6ab329c5c7
wireprototypes: move wire protocol response types to new module
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36072
diff
changeset
|
721 elif isinstance(rsp, wireprototypes.pusherr): |
12703
40bb5853fc4b
wireproto: introduce pusherr() to deal with "unsynced changes" error
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
11626
diff
changeset
|
722 rsp = '0\n%s\n' % rsp.res |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
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parents:
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diff
changeset
|
723 res.drain = True |
a88d68dc3ee8
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
36857
diff
changeset
|
724 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
36073
cd6ab329c5c7
wireprototypes: move wire protocol response types to new module
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36072
diff
changeset
|
725 elif isinstance(rsp, wireprototypes.ooberror): |
36861
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36857
diff
changeset
|
726 setresponse(HTTP_OK, HGERRTYPE, bodybytes=rsp.message) |
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
727 else: |
a88d68dc3ee8
hgweb: create dedicated type for WSGI responses
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36857
diff
changeset
|
728 raise error.ProgrammingError('hgweb.protocol internal failure', rsp) |
35986
98a00aa0288d
wireprotoserver: move error response handling out of hgweb
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35984
diff
changeset
|
729 |
36064
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
730 def _sshv1respondbytes(fout, value): |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
731 """Send a bytes response for protocol version 1.""" |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
732 fout.write('%d\n' % len(value)) |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
733 fout.write(value) |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
734 fout.flush() |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
735 |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
736 def _sshv1respondstream(fout, source): |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
737 write = fout.write |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
738 for chunk in source.gen: |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
739 write(chunk) |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
740 fout.flush() |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
35988
diff
changeset
|
741 |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
742 def _sshv1respondooberror(fout, ferr, rsp): |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
743 ferr.write(b'%s\n-\n' % rsp) |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
744 ferr.flush() |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
745 fout.write(b'\n') |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
746 fout.flush() |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
747 |
37296
78103e4138b1
wireproto: port protocol handler to zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37295
diff
changeset
|
748 @zi.implementer(wireprototypes.baseprotocolhandler) |
78103e4138b1
wireproto: port protocol handler to zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37295
diff
changeset
|
749 class sshv1protocolhandler(object): |
36065
bf676267f64f
wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36064
diff
changeset
|
750 """Handler for requests services via version 1 of SSH protocol.""" |
bf676267f64f
wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36064
diff
changeset
|
751 def __init__(self, ui, fin, fout): |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35869
diff
changeset
|
752 self._ui = ui |
36065
bf676267f64f
wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36064
diff
changeset
|
753 self._fin = fin |
bf676267f64f
wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36064
diff
changeset
|
754 self._fout = fout |
37393
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
755 self._protocaps = set() |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
756 |
35873
29759c46aa1a
wireprotoserver: make name part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35872
diff
changeset
|
757 @property |
29759c46aa1a
wireprotoserver: make name part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35872
diff
changeset
|
758 def name(self): |
36536
3cd245945ef3
wireprotoserver: move SSHV1 and SSHV2 constants to wireprototypes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36526
diff
changeset
|
759 return wireprototypes.SSHV1 |
35873
29759c46aa1a
wireprotoserver: make name part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35872
diff
changeset
|
760 |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
761 def getargs(self, args): |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
762 data = {} |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
763 keys = args.split() |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
764 for n in xrange(len(keys)): |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35869
diff
changeset
|
765 argline = self._fin.readline()[:-1] |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
766 arg, l = argline.split() |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
767 if arg not in keys: |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
768 raise error.Abort(_("unexpected parameter %r") % arg) |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
769 if arg == '*': |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
770 star = {} |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
771 for k in xrange(int(l)): |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35869
diff
changeset
|
772 argline = self._fin.readline()[:-1] |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
773 arg, l = argline.split() |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35869
diff
changeset
|
774 val = self._fin.read(int(l)) |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
775 star[arg] = val |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
776 data['*'] = star |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
777 else: |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35869
diff
changeset
|
778 val = self._fin.read(int(l)) |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
779 data[arg] = val |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
780 return [data[k] for k in keys] |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
781 |
37393
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
782 def getprotocaps(self): |
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
783 return self._protocaps |
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
784 |
37414
2d965bfeb8f6
wireproto: allow direct stream processing for unbundle
Joerg Sonnenberger <joerg@bec.de>
parents:
37393
diff
changeset
|
785 def getpayload(self): |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36371
diff
changeset
|
786 # We initially send an empty response. This tells the client it is |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36371
diff
changeset
|
787 # OK to start sending data. If a client sees any other response, it |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36371
diff
changeset
|
788 # interprets it as an error. |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36371
diff
changeset
|
789 _sshv1respondbytes(self._fout, b'') |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36371
diff
changeset
|
790 |
36070
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36069
diff
changeset
|
791 # The file is in the form: |
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36069
diff
changeset
|
792 # |
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36069
diff
changeset
|
793 # <chunk size>\n<chunk> |
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36069
diff
changeset
|
794 # ... |
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36069
diff
changeset
|
795 # 0\n |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
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|
796 count = int(self._fin.readline()) |
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|
797 while count: |
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wireproto: allow direct stream processing for unbundle
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diff
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|
798 yield self._fin.read(count) |
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diff
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|
799 count = int(self._fin.readline()) |
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|
800 |
36066
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diff
changeset
|
801 @contextlib.contextmanager |
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|
802 def mayberedirectstdio(self): |
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diff
changeset
|
803 yield None |
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changeset
|
804 |
36069
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|
805 def client(self): |
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|
806 client = encoding.environ.get('SSH_CLIENT', '').split(' ', 1)[0] |
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|
807 return 'remote:ssh:' + client |
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|
808 |
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|
809 def addcapabilities(self, repo, caps): |
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|
810 if self.name == wireprototypes.SSHV1: |
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|
811 caps.append(b'protocaps') |
37053
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wireproto: nominally don't expose "batch" to version 2 wire transports
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
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|
812 caps.append(b'batch') |
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|
813 return caps |
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|
814 |
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|
815 def checkperm(self, perm): |
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|
816 pass |
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diff
changeset
|
817 |
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818 class sshv2protocolhandler(sshv1protocolhandler): |
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819 """Protocol handler for version 2 of the SSH protocol.""" |
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|
820 |
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821 @property |
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|
822 def name(self): |
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823 return wireprototypes.SSHV2 |
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|
824 |
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|
825 def _runsshserver(ui, repo, fin, fout, ev): |
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826 # This function operates like a state machine of sorts. The following |
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827 # states are defined: |
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828 # |
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829 # protov1-serving |
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830 # Server is in protocol version 1 serving mode. Commands arrive on |
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|
831 # new lines. These commands are processed in this state, one command |
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832 # after the other. |
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|
833 # |
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834 # protov2-serving |
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|
835 # Server is in protocol version 2 serving mode. |
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|
836 # |
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|
837 # upgrade-initial |
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838 # The server is going to process an upgrade request. |
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|
839 # |
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|
840 # upgrade-v2-filter-legacy-handshake |
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|
841 # The protocol is being upgraded to version 2. The server is expecting |
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842 # the legacy handshake from version 1. |
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|
843 # |
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844 # upgrade-v2-finish |
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845 # The upgrade to version 2 of the protocol is imminent. |
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|
846 # |
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847 # shutdown |
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|
848 # The server is shutting down, possibly in reaction to a client event. |
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|
849 # |
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850 # And here are their transitions: |
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|
851 # |
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|
852 # protov1-serving -> shutdown |
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|
853 # When server receives an empty request or encounters another |
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|
854 # error. |
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|
855 # |
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|
856 # protov1-serving -> upgrade-initial |
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|
857 # An upgrade request line was seen. |
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|
858 # |
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|
859 # upgrade-initial -> upgrade-v2-filter-legacy-handshake |
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|
860 # Upgrade to version 2 in progress. Server is expecting to |
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changeset
|
861 # process a legacy handshake. |
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|
862 # |
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|
863 # upgrade-v2-filter-legacy-handshake -> shutdown |
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diff
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|
864 # Client did not fulfill upgrade handshake requirements. |
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|
865 # |
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changeset
|
866 # upgrade-v2-filter-legacy-handshake -> upgrade-v2-finish |
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diff
changeset
|
867 # Client fulfilled version 2 upgrade requirements. Finishing that |
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changeset
|
868 # upgrade. |
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changeset
|
869 # |
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|
870 # upgrade-v2-finish -> protov2-serving |
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diff
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|
871 # Protocol upgrade to version 2 complete. Server can now speak protocol |
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|
872 # version 2. |
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|
873 # |
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|
874 # protov2-serving -> protov1-serving |
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|
875 # Ths happens by default since protocol version 2 is the same as |
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|
876 # version 1 except for the handshake. |
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|
877 |
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|
878 state = 'protov1-serving' |
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|
879 proto = sshv1protocolhandler(ui, fin, fout) |
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|
880 protoswitched = False |
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|
881 |
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changeset
|
882 while not ev.is_set(): |
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|
883 if state == 'protov1-serving': |
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|
884 # Commands are issued on new lines. |
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|
885 request = fin.readline()[:-1] |
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|
886 |
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changeset
|
887 # Empty lines signal to terminate the connection. |
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|
888 if not request: |
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|
889 state = 'shutdown' |
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|
890 continue |
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|
891 |
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|
892 # It looks like a protocol upgrade request. Transition state to |
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changeset
|
893 # handle it. |
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changeset
|
894 if request.startswith(b'upgrade '): |
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changeset
|
895 if protoswitched: |
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|
896 _sshv1respondooberror(fout, ui.ferr, |
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|
897 b'cannot upgrade protocols multiple ' |
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|
898 b'times') |
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|
899 state = 'shutdown' |
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|
900 continue |
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|
901 |
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|
902 state = 'upgrade-initial' |
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diff
changeset
|
903 continue |
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changeset
|
904 |
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|
905 available = wireproto.commands.commandavailable(request, proto) |
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diff
changeset
|
906 |
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diff
changeset
|
907 # This command isn't available. Send an empty response and go |
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|
908 # back to waiting for a new command. |
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|
909 if not available: |
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changeset
|
910 _sshv1respondbytes(fout, b'') |
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changeset
|
911 continue |
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diff
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|
912 |
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changeset
|
913 rsp = wireproto.dispatch(repo, proto, request) |
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|
914 |
3b3a987bbbaa
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diff
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|
915 if isinstance(rsp, bytes): |
3b3a987bbbaa
wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
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diff
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|
916 _sshv1respondbytes(fout, rsp) |
3b3a987bbbaa
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|
917 elif isinstance(rsp, wireprototypes.bytesresponse): |
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|
918 _sshv1respondbytes(fout, rsp.data) |
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|
919 elif isinstance(rsp, wireprototypes.streamres): |
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diff
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|
920 _sshv1respondstream(fout, rsp) |
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|
921 elif isinstance(rsp, wireprototypes.streamreslegacy): |
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wireprotoserver: move SSH server operation to a standalone function
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diff
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|
922 _sshv1respondstream(fout, rsp) |
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diff
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|
923 elif isinstance(rsp, wireprototypes.pushres): |
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|
924 _sshv1respondbytes(fout, b'') |
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|
925 _sshv1respondbytes(fout, b'%d' % rsp.res) |
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diff
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|
926 elif isinstance(rsp, wireprototypes.pusherr): |
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|
927 _sshv1respondbytes(fout, rsp.res) |
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|
928 elif isinstance(rsp, wireprototypes.ooberror): |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
929 _sshv1respondooberror(fout, ui.ferr, rsp.message) |
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|
930 else: |
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|
931 raise error.ProgrammingError('unhandled response type from ' |
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diff
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|
932 'wire protocol command: %s' % rsp) |
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diff
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|
933 |
36215
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|
934 # For now, protocol version 2 serving just goes back to version 1. |
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|
935 elif state == 'protov2-serving': |
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|
936 state = 'protov1-serving' |
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|
937 continue |
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|
938 |
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|
939 elif state == 'upgrade-initial': |
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|
940 # We should never transition into this state if we've switched |
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|
941 # protocols. |
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|
942 assert not protoswitched |
36536
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wireprotoserver: move SSHV1 and SSHV2 constants to wireprototypes
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36526
diff
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|
943 assert proto.name == wireprototypes.SSHV1 |
36215
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|
944 |
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|
945 # Expected: upgrade <token> <capabilities> |
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|
946 # If we get something else, the request is malformed. It could be |
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|
947 # from a future client that has altered the upgrade line content. |
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|
948 # We treat this as an unknown command. |
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|
949 try: |
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|
950 token, caps = request.split(b' ')[1:] |
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|
951 except ValueError: |
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|
952 _sshv1respondbytes(fout, b'') |
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|
953 state = 'protov1-serving' |
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diff
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|
954 continue |
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diff
changeset
|
955 |
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|
956 # Send empty response if we don't support upgrading protocols. |
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|
957 if not ui.configbool('experimental', 'sshserver.support-v2'): |
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|
958 _sshv1respondbytes(fout, b'') |
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|
959 state = 'protov1-serving' |
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|
960 continue |
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|
961 |
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|
962 try: |
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|
963 caps = urlreq.parseqs(caps) |
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|
964 except ValueError: |
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|
965 _sshv1respondbytes(fout, b'') |
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|
966 state = 'protov1-serving' |
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|
967 continue |
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|
968 |
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|
969 # We don't see an upgrade request to protocol version 2. Ignore |
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|
970 # the upgrade request. |
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|
971 wantedprotos = caps.get(b'proto', [b''])[0] |
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|
972 if SSHV2 not in wantedprotos: |
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|
973 _sshv1respondbytes(fout, b'') |
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|
974 state = 'protov1-serving' |
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diff
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|
975 continue |
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diff
changeset
|
976 |
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changeset
|
977 # It looks like we can honor this upgrade request to protocol 2. |
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|
978 # Filter the rest of the handshake protocol request lines. |
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|
979 state = 'upgrade-v2-filter-legacy-handshake' |
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|
980 continue |
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|
981 |
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changeset
|
982 elif state == 'upgrade-v2-filter-legacy-handshake': |
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changeset
|
983 # Client should have sent legacy handshake after an ``upgrade`` |
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|
984 # request. Expected lines: |
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changeset
|
985 # |
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diff
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|
986 # hello |
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|
987 # between |
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changeset
|
988 # pairs 81 |
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|
989 # 0000...-0000... |
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|
990 |
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diff
changeset
|
991 ok = True |
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diff
changeset
|
992 for line in (b'hello', b'between', b'pairs 81'): |
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diff
changeset
|
993 request = fin.readline()[:-1] |
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|
994 |
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diff
changeset
|
995 if request != line: |
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|
996 _sshv1respondooberror(fout, ui.ferr, |
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diff
changeset
|
997 b'malformed handshake protocol: ' |
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|
998 b'missing %s' % line) |
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diff
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|
999 ok = False |
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|
1000 state = 'shutdown' |
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|
1001 break |
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changeset
|
1002 |
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|
1003 if not ok: |
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|
1004 continue |
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diff
changeset
|
1005 |
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|
1006 request = fin.read(81) |
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|
1007 if request != b'%s-%s' % (b'0' * 40, b'0' * 40): |
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|
1008 _sshv1respondooberror(fout, ui.ferr, |
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|
1009 b'malformed handshake protocol: ' |
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|
1010 b'missing between argument value') |
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|
1011 state = 'shutdown' |
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|
1012 continue |
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|
1013 |
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|
1014 state = 'upgrade-v2-finish' |
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|
1015 continue |
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changeset
|
1016 |
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changeset
|
1017 elif state == 'upgrade-v2-finish': |
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|
1018 # Send the upgrade response. |
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|
1019 fout.write(b'upgraded %s %s\n' % (token, SSHV2)) |
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|
1020 servercaps = wireproto.capabilities(repo, proto) |
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|
1021 rsp = b'capabilities: %s' % servercaps.data |
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|
1022 fout.write(b'%d\n%s\n' % (len(rsp), rsp)) |
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|
1023 fout.flush() |
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|
1024 |
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|
1025 proto = sshv2protocolhandler(ui, fin, fout) |
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1026 protoswitched = True |
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1027 |
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1028 state = 'protov2-serving' |
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1029 continue |
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1030 |
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1031 elif state == 'shutdown': |
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1032 break |
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1033 |
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1034 else: |
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1035 raise error.ProgrammingError('unhandled ssh server state: %s' % |
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1036 state) |
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1037 |
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1038 class sshserver(object): |
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1039 def __init__(self, ui, repo, logfh=None): |
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1040 self._ui = ui |
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1041 self._repo = repo |
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1042 self._fin = ui.fin |
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1043 self._fout = ui.fout |
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1044 |
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1045 # Log write I/O to stdout and stderr if configured. |
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1046 if logfh: |
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1047 self._fout = util.makeloggingfileobject( |
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1048 logfh, self._fout, 'o', logdata=True) |
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1049 ui.ferr = util.makeloggingfileobject( |
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1050 logfh, ui.ferr, 'e', logdata=True) |
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1051 |
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1052 hook.redirect(True) |
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1053 ui.fout = repo.ui.fout = ui.ferr |
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1054 |
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1055 # Prevent insertion/deletion of CRs |
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1056 procutil.setbinary(self._fin) |
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1057 procutil.setbinary(self._fout) |
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1058 |
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1059 def serve_forever(self): |
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1060 self.serveuntil(threading.Event()) |
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1061 sys.exit(0) |
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1062 |
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1063 def serveuntil(self, ev): |
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1064 """Serve until a threading.Event is set.""" |
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1065 _runsshserver(self._ui, self._repo, self._fin, self._fout, ev) |