Mercurial > hg
view mercurial/urllibcompat.py @ 37047:fddcb51b5084
wireproto: define permissions-based routing of HTTPv2 wire protocol
Now that we have a scaffolding for serving version 2 of the HTTP
protocol, let's start implementing it.
A good place to start is URL routing and basic request processing
semantics. We can focus on content types, capabilities detect, etc
later.
Version 2 of the HTTP wire protocol encodes the needed permissions
of the request in the URL path. The reasons for this are documented
in the added documentation. In short, a) it makes it really easy and
fail proof for server administrators to implement path-based
authentication and b) it will enable clients to realize very early in
a server exchange that authentication will be required to complete
the operation. This latter point avoids all kinds of complexity and
problems, like dealing with Expect: 100-continue and clients finding
out later during `hg push` that they need to provide authentication.
This will avoid the current badness where clients send a full bundle,
get an HTTP 403, provide authentication, then retransmit the bundle.
In order to implement command checking, we needed to implement a
protocol handler for the new wire protocol. Our handler is just
small enough to run the code we've implemented.
Tests for the defined functionality have been added.
I very much want to refactor the permissions checking code and define
a better response format. But this can be done later. Nothing is
covered by backwards compatibility at this point.
Differential Revision: https://phab.mercurial-scm.org/D2836
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 19 Mar 2018 16:43:47 -0700 |
parents | 5bc7ff103081 |
children | 5774fc623a18 |
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# urllibcompat.py - adapters to ease using urllib2 on Py2 and urllib on Py3 # # Copyright 2017 Google, Inc. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import from . import pycompat _sysstr = pycompat.sysstr class _pycompatstub(object): def __init__(self): self._aliases = {} def _registeraliases(self, origin, items): """Add items that will be populated at the first access""" items = map(_sysstr, items) self._aliases.update( (item.replace(r'_', r'').lower(), (origin, item)) for item in items) def _registeralias(self, origin, attr, name): """Alias ``origin``.``attr`` as ``name``""" self._aliases[_sysstr(name)] = (origin, _sysstr(attr)) def __getattr__(self, name): try: origin, item = self._aliases[name] except KeyError: raise AttributeError(name) self.__dict__[name] = obj = getattr(origin, item) return obj httpserver = _pycompatstub() urlreq = _pycompatstub() urlerr = _pycompatstub() if pycompat.ispy3: import urllib.parse urlreq._registeraliases(urllib.parse, ( "splitattr", "splitpasswd", "splitport", "splituser", "urlparse", "urlunparse", )) urlreq._registeralias(urllib.parse, "parse_qs", "parseqs") urlreq._registeralias(urllib.parse, "parse_qsl", "parseqsl") urlreq._registeralias(urllib.parse, "unquote_to_bytes", "unquote") import urllib.request urlreq._registeraliases(urllib.request, ( "AbstractHTTPHandler", "BaseHandler", "build_opener", "FileHandler", "FTPHandler", "ftpwrapper", "HTTPHandler", "HTTPSHandler", "install_opener", "pathname2url", "HTTPBasicAuthHandler", "HTTPDigestAuthHandler", "HTTPPasswordMgrWithDefaultRealm", "ProxyHandler", "Request", "url2pathname", "urlopen", )) import urllib.response urlreq._registeraliases(urllib.response, ( "addclosehook", "addinfourl", )) import urllib.error urlerr._registeraliases(urllib.error, ( "HTTPError", "URLError", )) import http.server httpserver._registeraliases(http.server, ( "HTTPServer", "BaseHTTPRequestHandler", "SimpleHTTPRequestHandler", "CGIHTTPRequestHandler", )) # urllib.parse.quote() accepts both str and bytes, decodes bytes # (if necessary), and returns str. This is wonky. We provide a custom # implementation that only accepts bytes and emits bytes. def quote(s, safe=r'/'): s = urllib.parse.quote_from_bytes(s, safe=safe) return s.encode('ascii', 'strict') # urllib.parse.urlencode() returns str. We use this function to make # sure we return bytes. def urlencode(query, doseq=False): s = urllib.parse.urlencode(query, doseq=doseq) return s.encode('ascii') urlreq.quote = quote urlreq.urlencode = urlencode def getfullurl(req): return req.full_url def gethost(req): return req.host def getselector(req): return req.selector def getdata(req): return req.data def hasdata(req): return req.data is not None else: import BaseHTTPServer import CGIHTTPServer import SimpleHTTPServer import urllib2 import urllib import urlparse urlreq._registeraliases(urllib, ( "addclosehook", "addinfourl", "ftpwrapper", "pathname2url", "quote", "splitattr", "splitpasswd", "splitport", "splituser", "unquote", "url2pathname", "urlencode", )) urlreq._registeraliases(urllib2, ( "AbstractHTTPHandler", "BaseHandler", "build_opener", "FileHandler", "FTPHandler", "HTTPBasicAuthHandler", "HTTPDigestAuthHandler", "HTTPHandler", "HTTPPasswordMgrWithDefaultRealm", "HTTPSHandler", "install_opener", "ProxyHandler", "Request", "urlopen", )) urlreq._registeraliases(urlparse, ( "urlparse", "urlunparse", )) urlreq._registeralias(urlparse, "parse_qs", "parseqs") urlreq._registeralias(urlparse, "parse_qsl", "parseqsl") urlerr._registeraliases(urllib2, ( "HTTPError", "URLError", )) httpserver._registeraliases(BaseHTTPServer, ( "HTTPServer", "BaseHTTPRequestHandler", )) httpserver._registeraliases(SimpleHTTPServer, ( "SimpleHTTPRequestHandler", )) httpserver._registeraliases(CGIHTTPServer, ( "CGIHTTPRequestHandler", )) def gethost(req): return req.get_host() def getselector(req): return req.get_selector() def getfullurl(req): return req.get_full_url() def getdata(req): return req.get_data() def hasdata(req): return req.has_data()