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# hgweb/hgweb_mod.py - Web interface for a repository.
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#
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# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import contextlib
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import os
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from .common import (
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ErrorResponse,
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HTTP_BAD_REQUEST,
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HTTP_NOT_FOUND,
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HTTP_NOT_MODIFIED,
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HTTP_OK,
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HTTP_SERVER_ERROR,
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caching,
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cspvalues,
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permhooks,
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)
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from .. import (
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encoding,
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error,
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formatter,
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hg,
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hook,
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profiling,
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pycompat,
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repoview,
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templatefilters,
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templater,
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ui as uimod,
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util,
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wireprotoserver,
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)
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from . import (
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request as requestmod,
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webcommands,
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webutil,
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wsgicgi,
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)
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archivespecs = util.sortdict((
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('zip', ('application/zip', 'zip', '.zip', None)),
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('gz', ('application/x-gzip', 'tgz', '.tar.gz', None)),
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('bz2', ('application/x-bzip2', 'tbz2', '.tar.bz2', None)),
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))
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def getstyle(req, configfn, templatepath):
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fromreq = req.form.get('style', [None])[0]
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styles = (
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fromreq,
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configfn('web', 'style'),
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'paper',
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)
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return styles, templater.stylemap(styles, templatepath)
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def makebreadcrumb(url, prefix=''):
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'''Return a 'URL breadcrumb' list
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A 'URL breadcrumb' is a list of URL-name pairs,
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corresponding to each of the path items on a URL.
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This can be used to create path navigation entries.
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'''
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if url.endswith('/'):
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url = url[:-1]
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if prefix:
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url = '/' + prefix + url
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relpath = url
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if relpath.startswith('/'):
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relpath = relpath[1:]
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breadcrumb = []
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urlel = url
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pathitems = [''] + relpath.split('/')
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for pathel in reversed(pathitems):
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if not pathel or not urlel:
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break
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breadcrumb.append({'url': urlel, 'name': pathel})
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urlel = os.path.dirname(urlel)
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return reversed(breadcrumb)
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class requestcontext(object):
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"""Holds state/context for an individual request.
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Servers can be multi-threaded. Holding state on the WSGI application
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is prone to race conditions. Instances of this class exist to hold
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mutable and race-free state for requests.
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"""
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def __init__(self, app, repo):
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self.repo = repo
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self.reponame = app.reponame
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self.archivespecs = archivespecs
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self.maxchanges = self.configint('web', 'maxchanges')
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self.stripecount = self.configint('web', 'stripes')
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self.maxshortchanges = self.configint('web', 'maxshortchanges')
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self.maxfiles = self.configint('web', 'maxfiles')
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self.allowpull = self.configbool('web', 'allow-pull')
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# we use untrusted=False to prevent a repo owner from using
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# web.templates in .hg/hgrc to get access to any file readable
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# by the user running the CGI script
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self.templatepath = self.config('web', 'templates', untrusted=False)
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# This object is more expensive to build than simple config values.
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# It is shared across requests. The app will replace the object
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# if it is updated. Since this is a reference and nothing should
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# modify the underlying object, it should be constant for the lifetime
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# of the request.
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self.websubtable = app.websubtable
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self.csp, self.nonce = cspvalues(self.repo.ui)
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# Trust the settings from the .hg/hgrc files by default.
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def config(self, section, name, default=uimod._unset, untrusted=True):
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return self.repo.ui.config(section, name, default,
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untrusted=untrusted)
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def configbool(self, section, name, default=uimod._unset, untrusted=True):
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return self.repo.ui.configbool(section, name, default,
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untrusted=untrusted)
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def configint(self, section, name, default=uimod._unset, untrusted=True):
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return self.repo.ui.configint(section, name, default,
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untrusted=untrusted)
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def configlist(self, section, name, default=uimod._unset, untrusted=True):
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return self.repo.ui.configlist(section, name, default,
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untrusted=untrusted)
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def archivelist(self, nodeid):
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allowed = self.configlist('web', 'allow_archive')
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for typ, spec in self.archivespecs.iteritems():
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if typ in allowed or self.configbool('web', 'allow%s' % typ):
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yield {'type': typ, 'extension': spec[2], 'node': nodeid}
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def templater(self, wsgireq, req):
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# determine scheme, port and server name
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# this is needed to create absolute urls
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logourl = self.config('web', 'logourl')
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logoimg = self.config('web', 'logoimg')
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staticurl = (self.config('web', 'staticurl')
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or req.apppath + '/static/')
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if not staticurl.endswith('/'):
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staticurl += '/'
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# some functions for the templater
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def motd(**map):
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yield self.config('web', 'motd')
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# figure out which style to use
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vars = {}
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styles, (style, mapfile) = getstyle(wsgireq, self.config,
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self.templatepath)
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if style == styles[0]:
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vars['style'] = style
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sessionvars = webutil.sessionvars(vars, '?')
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if not self.reponame:
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self.reponame = (self.config('web', 'name', '')
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or wsgireq.env.get('REPO_NAME')
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or req.apppath or self.repo.root)
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def websubfilter(text):
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return templatefilters.websub(text, self.websubtable)
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# create the templater
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# TODO: export all keywords: defaults = templatekw.keywords.copy()
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defaults = {
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'url': req.apppath + '/',
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'logourl': logourl,
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'logoimg': logoimg,
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'staticurl': staticurl,
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'urlbase': req.advertisedbaseurl,
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'repo': self.reponame,
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'encoding': encoding.encoding,
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'motd': motd,
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'sessionvars': sessionvars,
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'pathdef': makebreadcrumb(req.apppath),
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'style': style,
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'nonce': self.nonce,
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}
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tres = formatter.templateresources(self.repo.ui, self.repo)
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tmpl = templater.templater.frommapfile(mapfile,
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filters={'websub': websubfilter},
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defaults=defaults,
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resources=tres)
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return tmpl
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class hgweb(object):
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"""HTTP server for individual repositories.
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Instances of this class serve HTTP responses for a particular
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repository.
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Instances are typically used as WSGI applications.
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Some servers are multi-threaded. On these servers, there may
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be multiple active threads inside __call__.
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"""
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def __init__(self, repo, name=None, baseui=None):
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if isinstance(repo, str):
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if baseui:
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u = baseui.copy()
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else:
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u = uimod.ui.load()
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r = hg.repository(u, repo)
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else:
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# we trust caller to give us a private copy
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r = repo
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r.ui.setconfig('ui', 'report_untrusted', 'off', 'hgweb')
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r.baseui.setconfig('ui', 'report_untrusted', 'off', 'hgweb')
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r.ui.setconfig('ui', 'nontty', 'true', 'hgweb')
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r.baseui.setconfig('ui', 'nontty', 'true', 'hgweb')
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# resolve file patterns relative to repo root
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r.ui.setconfig('ui', 'forcecwd', r.root, 'hgweb')
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r.baseui.setconfig('ui', 'forcecwd', r.root, 'hgweb')
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# displaying bundling progress bar while serving feel wrong and may
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# break some wsgi implementation.
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r.ui.setconfig('progress', 'disable', 'true', 'hgweb')
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r.baseui.setconfig('progress', 'disable', 'true', 'hgweb')
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self._repos = [hg.cachedlocalrepo(self._webifyrepo(r))]
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self._lastrepo = self._repos[0]
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hook.redirect(True)
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self.reponame = name
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def _webifyrepo(self, repo):
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repo = getwebview(repo)
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self.websubtable = webutil.getwebsubs(repo)
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return repo
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@contextlib.contextmanager
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def _obtainrepo(self):
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"""Obtain a repo unique to the caller.
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Internally we maintain a stack of cachedlocalrepo instances
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to be handed out. If one is available, we pop it and return it,
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ensuring it is up to date in the process. If one is not available,
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we clone the most recently used repo instance and return it.
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It is currently possible for the stack to grow without bounds
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if the server allows infinite threads. However, servers should
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have a thread limit, thus establishing our limit.
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"""
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if self._repos:
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cached = self._repos.pop()
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r, created = cached.fetch()
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else:
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cached = self._lastrepo.copy()
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r, created = cached.fetch()
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if created:
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r = self._webifyrepo(r)
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self._lastrepo = cached
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self.mtime = cached.mtime
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try:
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yield r
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finally:
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self._repos.append(cached)
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def run(self):
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"""Start a server from CGI environment.
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Modern servers should be using WSGI and should avoid this
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method, if possible.
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"""
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if not encoding.environ.get('GATEWAY_INTERFACE',
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'').startswith("CGI/1."):
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raise RuntimeError("This function is only intended to be "
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"called while running as a CGI script.")
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wsgicgi.launch(self)
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def __call__(self, env, respond):
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"""Run the WSGI application.
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This may be called by multiple threads.
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"""
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req = requestmod.wsgirequest(env, respond)
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return self.run_wsgi(req)
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def run_wsgi(self, wsgireq):
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"""Internal method to run the WSGI application.
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This is typically only called by Mercurial. External consumers
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should be using instances of this class as the WSGI application.
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"""
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with self._obtainrepo() as repo:
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profile = repo.ui.configbool('profiling', 'enabled')
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with profiling.profile(repo.ui, enabled=profile):
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for r in self._runwsgi(wsgireq, repo):
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yield r
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def _runwsgi(self, wsgireq, repo):
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req = requestmod.parserequestfromenv(wsgireq.env)
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rctx = requestcontext(self, repo)
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# This state is global across all threads.
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encoding.encoding = rctx.config('web', 'encoding')
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rctx.repo.ui.environ = wsgireq.env
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if rctx.csp:
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# hgwebdir may have added CSP header. Since we generate our own,
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# replace it.
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wsgireq.headers = [h for h in wsgireq.headers
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if h[0] != 'Content-Security-Policy']
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wsgireq.headers.append(('Content-Security-Policy', rctx.csp))
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handled, res = wireprotoserver.handlewsgirequest(
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rctx, wsgireq, req, self.check_perm)
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if handled:
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return res
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if req.havepathinfo:
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query = req.dispatchpath
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else:
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query = req.querystring.partition('&')[0].partition(';')[0]
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# translate user-visible url structure to internal structure
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args = query.split('/', 2)
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if 'cmd' not in wsgireq.form and args and args[0]:
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cmd = args.pop(0)
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style = cmd.rfind('-')
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if style != -1:
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wsgireq.form['style'] = [cmd[:style]]
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cmd = cmd[style + 1:]
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# avoid accepting e.g. style parameter as command
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if util.safehasattr(webcommands, cmd):
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wsgireq.form['cmd'] = [cmd]
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if cmd == 'static':
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wsgireq.form['file'] = ['/'.join(args)]
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else:
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if args and args[0]:
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node = args.pop(0).replace('%2F', '/')
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wsgireq.form['node'] = [node]
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if args:
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wsgireq.form['file'] = args
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ua = req.headers.get('User-Agent', '')
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if cmd == 'rev' and 'mercurial' in ua:
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wsgireq.form['style'] = ['raw']
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if cmd == 'archive':
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fn = wsgireq.form['node'][0]
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for type_, spec in rctx.archivespecs.iteritems():
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ext = spec[2]
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if fn.endswith(ext):
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wsgireq.form['node'] = [fn[:-len(ext)]]
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wsgireq.form['type'] = [type_]
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else:
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cmd = wsgireq.form.get('cmd', [''])[0]
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# process the web interface request
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try:
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tmpl = rctx.templater(wsgireq, req)
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ctype = tmpl('mimetype', encoding=encoding.encoding)
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ctype = templater.stringify(ctype)
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# check read permissions non-static content
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if cmd != 'static':
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self.check_perm(rctx, wsgireq, None)
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if cmd == '':
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wsgireq.form['cmd'] = [tmpl.cache['default']]
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cmd = wsgireq.form['cmd'][0]
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# Don't enable caching if using a CSP nonce because then it wouldn't
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# be a nonce.
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if rctx.configbool('web', 'cache') and not rctx.nonce:
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caching(self, wsgireq) # sets ETag header or raises NOT_MODIFIED
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if cmd not in webcommands.__all__:
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msg = 'no such method: %s' % cmd
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raise ErrorResponse(HTTP_BAD_REQUEST, msg)
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elif cmd == 'file' and 'raw' in wsgireq.form.get('style', []):
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rctx.ctype = ctype
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content = webcommands.rawfile(rctx, wsgireq, tmpl)
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else:
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content = getattr(webcommands, cmd)(rctx, wsgireq, tmpl)
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wsgireq.respond(HTTP_OK, ctype)
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return content
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except (error.LookupError, error.RepoLookupError) as err:
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wsgireq.respond(HTTP_NOT_FOUND, ctype)
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msg = pycompat.bytestr(err)
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if (util.safehasattr(err, 'name') and
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not isinstance(err, error.ManifestLookupError)):
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msg = 'revision not found: %s' % err.name
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return tmpl('error', error=msg)
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except (error.RepoError, error.RevlogError) as inst:
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wsgireq.respond(HTTP_SERVER_ERROR, ctype)
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return tmpl('error', error=pycompat.bytestr(inst))
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except ErrorResponse as inst:
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wsgireq.respond(inst, ctype)
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if inst.code == HTTP_NOT_MODIFIED:
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# Not allowed to return a body on a 304
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return ['']
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return tmpl('error', error=pycompat.bytestr(inst))
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def check_perm(self, rctx, req, op):
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for permhook in permhooks:
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permhook(rctx, req, op)
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def getwebview(repo):
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"""The 'web.view' config controls changeset filter to hgweb. Possible
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values are ``served``, ``visible`` and ``all``. Default is ``served``.
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The ``served`` filter only shows changesets that can be pulled from the
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hgweb instance. The``visible`` filter includes secret changesets but
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still excludes "hidden" one.
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See the repoview module for details.
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The option has been around undocumented since Mercurial 2.5, but no
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user ever asked about it. So we better keep it undocumented for now."""
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# experimental config: web.view
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viewconfig = repo.ui.config('web', 'view', untrusted=True)
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if viewconfig == 'all':
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return repo.unfiltered()
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elif viewconfig in repoview.filtertable:
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return repo.filtered(viewconfig)
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else:
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return repo.filtered('served')
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