Mercurial > hg
view mercurial/rcutil.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 | 75979c8d4572 |
children | edbcf5b239f9 |
line wrap: on
line source
# rcutil.py - utilities about config paths, special config sections etc. # # Copyright Mercurial Contributors # # 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 import os from . import ( encoding, pycompat, util, ) if pycompat.iswindows: from . import scmwindows as scmplatform else: from . import scmposix as scmplatform fallbackpager = scmplatform.fallbackpager systemrcpath = scmplatform.systemrcpath userrcpath = scmplatform.userrcpath def _expandrcpath(path): '''path could be a file or a directory. return a list of file paths''' p = util.expandpath(path) if os.path.isdir(p): join = os.path.join return [join(p, f) for f, k in util.listdir(p) if f.endswith('.rc')] return [p] def envrcitems(env=None): '''Return [(section, name, value, source)] config items. The config items are extracted from environment variables specified by env, used to override systemrc, but not userrc. If env is not provided, encoding.environ will be used. ''' if env is None: env = encoding.environ checklist = [ ('EDITOR', 'ui', 'editor'), ('VISUAL', 'ui', 'editor'), ('PAGER', 'pager', 'pager'), ] result = [] for envname, section, configname in checklist: if envname not in env: continue result.append((section, configname, env[envname], '$%s' % envname)) return result def defaultrcpath(): '''return rc paths in default.d''' path = [] defaultpath = os.path.join(util.datapath, 'default.d') if os.path.isdir(defaultpath): path = _expandrcpath(defaultpath) return path def rccomponents(): '''return an ordered [(type, obj)] about where to load configs. respect $HGRCPATH. if $HGRCPATH is empty, only .hg/hgrc of current repo is used. if $HGRCPATH is not set, the platform default will be used. if a directory is provided, *.rc files under it will be used. type could be either 'path' or 'items', if type is 'path', obj is a string, and is the config file path. if type is 'items', obj is a list of (section, name, value, source) that should fill the config directly. ''' envrc = ('items', envrcitems()) if 'HGRCPATH' in encoding.environ: # assume HGRCPATH is all about user configs so environments can be # overridden. _rccomponents = [envrc] for p in encoding.environ['HGRCPATH'].split(pycompat.ospathsep): if not p: continue _rccomponents.extend(('path', p) for p in _expandrcpath(p)) else: normpaths = lambda paths: [('path', os.path.normpath(p)) for p in paths] _rccomponents = normpaths(defaultrcpath() + systemrcpath()) _rccomponents.append(envrc) _rccomponents.extend(normpaths(userrcpath())) return _rccomponents def defaultpagerenv(): '''return a dict of default environment variables and their values, intended to be set before starting a pager. ''' return {'LESS': 'FRX', 'LV': '-c'}