Mercurial > hg
annotate mercurial/demandimport.py @ 20172:181108726ea5
http: reuse authentication info after the first failed request (issue3567)
Context: mercurial access to repository server with http access, and this
server is protected by basic auth.
Before patch:
* mercurial try an anonymous access to server, server return 401 response and
mercurial resend request with login / password information
After patch:
* mercurial try an anonymous access to server, server return 401
response. For all subsequent requests, mercurial keep in memory this
information (this server need basic auth information).
This patch reduce the number of http access against mercurial server.
Example, before patch :
10.10.168.170 - - [25/Oct/2013:15:44:51 +0200] "GET /hg/testagt?cmd=capabilities
HTTP/1.1" 401 260 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:44:52 +0200] "GET /hg/testagt?cmd=capabilities
HTTP/1.1" 200 147 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:00 +0200] "GET /hg/testagt?cmd=capabilities
HTTP/1.1" 401 260 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:01 +0200] "GET /hg/testagt?cmd=capabilities
HTTP/1.1" 200 147 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:03 +0200] "GET /hg/testagt?cmd=batch
HTTP/1.1" 401 260 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:04 +0200] "GET /hg/testagt?cmd=batch
HTTP/1.1" 200 42 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:06 +0200] "GET /hg/testagt?cmd=getbundle
HTTP/1.1" 401 260 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:07 +0200] "GET /hg/testagt?cmd=getbundle
HTTP/1.1" 200 61184 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:09 +0200] "GET /hg/testagt?cmd=listkeys
HTTP/1.1" 401 260 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:10 +0200] "GET /hg/testagt?cmd=listkeys
HTTP/1.1" 200 15 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:12 +0200] "GET /hg/testagt?cmd=listkeys
HTTP/1.1" 401 260 "-" "mercurial/proto-1.0"
10.10.168.170 - - [25/Oct/2013:15:45:12 +0200] "GET /hg/testagt?cmd=listkeys
HTTP/1.1" 200 - "-" "mercurial/proto-1.0"
Example after patch :
10.10.168.170 - - [28/Oct/2013:11:49:14 +0100] "GET /hg/testagt?cmd=capabilities
HTTP/1.1" 401 260 "-" "mercurial/proto-1.0"
10.10.168.170 - - [28/Oct/2013:11:49:15 +0100] "GET /hg/testagt?cmd=capabilities
HTTP/1.1" 200 147 "-" "mercurial/proto-1.0"
10.10.168.170 - - [28/Oct/2013:11:49:17 +0100] "GET /hg/testagt?cmd=batch
HTTP/1.1" 200 42 "-" "mercurial/proto-1.0"
10.10.168.170 - - [28/Oct/2013:11:49:19 +0100] "GET /hg/testagt?cmd=getbundle
HTTP/1.1" 200 61184 "-" "mercurial/proto-1.0"
10.10.168.170 - - [28/Oct/2013:11:49:22 +0100] "GET /hg/testagt?cmd=listkeys
HTTP/1.1" 200 15 "-" "mercurial/proto-1.0"
10.10.168.170 - - [28/Oct/2013:11:49:24 +0100] "GET /hg/testagt?cmd=listkeys
HTTP/1.1" 200 - "-" "mercurial/proto-1.0"
In this last example, you can see only one 401 response.
author | Stéphane Klein <contact@stephane-klein.info> |
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date | Mon, 25 Nov 2013 17:18:12 +0100 |
parents | 621a26eb3a99 |
children | aac87f70f38e |
rev | line source |
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1 # demandimport.py - global demand-loading of modules for Mercurial |
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2 # |
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3 # Copyright 2006, 2007 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 ''' |
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9 demandimport - automatic demandloading of modules |
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10 |
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11 To enable this module, do: |
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12 |
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13 import demandimport; demandimport.enable() |
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14 |
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15 Imports of the following forms will be demand-loaded: |
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16 |
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17 import a, b.c |
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18 import a.b as c |
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19 from a import b,c # a will be loaded immediately |
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20 |
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21 These imports will not be delayed: |
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22 |
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23 from a import * |
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24 b = __import__(a) |
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25 ''' |
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26 |
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27 import __builtin__ |
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28 _origimport = __import__ |
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29 |
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30 nothing = object() |
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31 |
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32 try: |
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33 _origimport(__builtin__.__name__, {}, {}, None, -1) |
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34 except TypeError: # no level argument |
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35 def _import(name, globals, locals, fromlist, level): |
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36 "call _origimport with no level argument" |
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37 return _origimport(name, globals, locals, fromlist) |
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38 else: |
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39 _import = _origimport |
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40 |
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41 def _hgextimport(importfunc, name, globals, *args): |
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42 try: |
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43 return importfunc(name, globals, *args) |
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44 except ImportError: |
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45 if not globals: |
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46 raise |
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47 # extensions are loaded with "hgext_" prefix |
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48 hgextname = 'hgext_%s' % name |
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49 nameroot = hgextname.split('.', 1)[0] |
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50 contextroot = globals.get('__name__', '').split('.', 1)[0] |
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51 if nameroot != contextroot: |
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52 raise |
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53 # retry to import with "hgext_" prefix |
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54 return importfunc(hgextname, globals, *args) |
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55 |
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56 class _demandmod(object): |
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57 """module demand-loader and proxy""" |
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58 def __init__(self, name, globals, locals, level=-1): |
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59 if '.' in name: |
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60 head, rest = name.split('.', 1) |
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61 after = [rest] |
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62 else: |
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63 head = name |
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64 after = [] |
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65 object.__setattr__(self, "_data", |
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66 (head, globals, locals, after, level)) |
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67 object.__setattr__(self, "_module", None) |
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68 def _extend(self, name): |
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69 """add to the list of submodules to load""" |
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70 self._data[3].append(name) |
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71 def _load(self): |
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72 if not self._module: |
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73 head, globals, locals, after, level = self._data |
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74 mod = _hgextimport(_import, head, globals, locals, None, level) |
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75 # load submodules |
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76 def subload(mod, p): |
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77 h, t = p, None |
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78 if '.' in p: |
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79 h, t = p.split('.', 1) |
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80 if getattr(mod, h, nothing) is nothing: |
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81 setattr(mod, h, _demandmod(p, mod.__dict__, mod.__dict__)) |
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82 elif t: |
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83 subload(getattr(mod, h), t) |
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84 |
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85 for x in after: |
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86 subload(mod, x) |
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87 |
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88 # are we in the locals dictionary still? |
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89 if locals and locals.get(head) == self: |
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90 locals[head] = mod |
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91 object.__setattr__(self, "_module", mod) |
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92 |
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93 def __repr__(self): |
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94 if self._module: |
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95 return "<proxied module '%s'>" % self._data[0] |
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96 return "<unloaded module '%s'>" % self._data[0] |
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97 def __call__(self, *args, **kwargs): |
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98 raise TypeError("%s object is not callable" % repr(self)) |
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99 def __getattribute__(self, attr): |
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100 if attr in ('_data', '_extend', '_load', '_module'): |
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101 return object.__getattribute__(self, attr) |
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102 self._load() |
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103 return getattr(self._module, attr) |
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104 def __setattr__(self, attr, val): |
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105 self._load() |
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106 setattr(self._module, attr, val) |
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107 |
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108 def _demandimport(name, globals=None, locals=None, fromlist=None, level=-1): |
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109 if not locals or name in ignore or fromlist == ('*',): |
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110 # these cases we can't really delay |
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111 return _hgextimport(_import, name, globals, locals, fromlist, level) |
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112 elif not fromlist: |
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113 # import a [as b] |
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114 if '.' in name: # a.b |
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115 base, rest = name.split('.', 1) |
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116 # email.__init__ loading email.mime |
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117 if globals and globals.get('__name__', None) == base: |
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118 return _import(name, globals, locals, fromlist, level) |
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119 # if a is already demand-loaded, add b to its submodule list |
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120 if base in locals: |
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121 if isinstance(locals[base], _demandmod): |
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122 locals[base]._extend(rest) |
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123 return locals[base] |
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124 return _demandmod(name, globals, locals, level) |
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125 else: |
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126 if level != -1: |
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127 # from . import b,c,d or from .a import b,c,d |
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128 return _origimport(name, globals, locals, fromlist, level) |
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129 # from a import b,c,d |
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130 mod = _hgextimport(_origimport, name, globals, locals) |
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131 # recurse down the module chain |
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132 for comp in name.split('.')[1:]: |
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133 if getattr(mod, comp, nothing) is nothing: |
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134 setattr(mod, comp, _demandmod(comp, mod.__dict__, mod.__dict__)) |
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135 mod = getattr(mod, comp) |
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136 for x in fromlist: |
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137 # set requested submodules for demand load |
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138 if getattr(mod, x, nothing) is nothing: |
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139 setattr(mod, x, _demandmod(x, mod.__dict__, locals)) |
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140 return mod |
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141 |
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142 ignore = [ |
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143 '_hashlib', |
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144 '_xmlplus', |
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145 'fcntl', |
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146 'win32com.gen_py', |
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147 '_winreg', # 2.7 mimetypes needs immediate ImportError |
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148 'pythoncom', |
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149 # imported by tarfile, not available under Windows |
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150 'pwd', |
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151 'grp', |
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152 # imported by profile, itself imported by hotshot.stats, |
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153 # not available under Windows |
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154 'resource', |
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156 'gtk', | |
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157 # setuptools' pkg_resources.py expects "from __main__ import x" to |
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158 # raise ImportError if x not defined |
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159 '__main__', |
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160 '_ssl', # conditional imports in the stdlib, issue1964 |
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161 'rfc822', |
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162 'mimetools', |
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163 ] |
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164 |
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165 def enable(): |
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166 "enable global demand-loading of modules" |
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167 __builtin__.__import__ = _demandimport |
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168 |
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169 def disable(): |
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170 "disable global demand-loading of modules" |
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171 __builtin__.__import__ = _origimport |