Mercurial > hg
view mercurial/hgweb/hgweb_mod.py @ 9694:8269fe2d48f6
hgweb: send proper error messages to the client
Fixes a bug in protocol which caused an exception during exception handling in
some cases on Windows. Also makes sure the server error message is correctly
propagated to the client, instead of being thrown away.
author | Sune Foldager <cryo@cyanite.org> |
---|---|
date | Mon, 02 Nov 2009 10:20:04 +0100 |
parents | 36654238c050 |
children | 0e080d519d1b |
line wrap: on
line source
# hgweb/hgweb_mod.py - Web interface for a repository. # # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net> # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2, incorporated herein by reference. import os from mercurial import ui, hg, hook, error, encoding, templater from common import get_mtime, ErrorResponse from common import HTTP_OK, HTTP_BAD_REQUEST, HTTP_NOT_FOUND, HTTP_SERVER_ERROR from common import HTTP_UNAUTHORIZED, HTTP_METHOD_NOT_ALLOWED from request import wsgirequest import webcommands, protocol, webutil perms = { 'changegroup': 'pull', 'changegroupsubset': 'pull', 'unbundle': 'push', 'stream_out': 'pull', } class hgweb(object): def __init__(self, repo, name=None): if isinstance(repo, str): u = ui.ui() u.setconfig('ui', 'report_untrusted', 'off') u.setconfig('ui', 'interactive', 'off') self.repo = hg.repository(u, repo) else: self.repo = repo hook.redirect(True) self.mtime = -1 self.reponame = name self.archives = 'zip', 'gz', 'bz2' self.stripecount = 1 # a repo owner may set web.templates in .hg/hgrc to get any file # readable by the user running the CGI script self.templatepath = self.config('web', 'templates') # The CGI scripts are often run by a user different from the repo owner. # Trust the settings from the .hg/hgrc files by default. def config(self, section, name, default=None, untrusted=True): return self.repo.ui.config(section, name, default, untrusted=untrusted) def configbool(self, section, name, default=False, untrusted=True): return self.repo.ui.configbool(section, name, default, untrusted=untrusted) def configlist(self, section, name, default=None, untrusted=True): return self.repo.ui.configlist(section, name, default, untrusted=untrusted) def refresh(self): mtime = get_mtime(self.repo.root) if mtime != self.mtime: self.mtime = mtime self.repo = hg.repository(self.repo.ui, self.repo.root) self.maxchanges = int(self.config("web", "maxchanges", 10)) self.stripecount = int(self.config("web", "stripes", 1)) self.maxshortchanges = int(self.config("web", "maxshortchanges", 60)) self.maxfiles = int(self.config("web", "maxfiles", 10)) self.allowpull = self.configbool("web", "allowpull", True) encoding.encoding = self.config("web", "encoding", encoding.encoding) def run(self): if not os.environ.get('GATEWAY_INTERFACE', '').startswith("CGI/1."): raise RuntimeError("This function is only intended to be " "called while running as a CGI script.") import mercurial.hgweb.wsgicgi as wsgicgi wsgicgi.launch(self) def __call__(self, env, respond): req = wsgirequest(env, respond) return self.run_wsgi(req) def run_wsgi(self, req): self.refresh() # work with CGI variables to create coherent structure # use SCRIPT_NAME, PATH_INFO and QUERY_STRING as well as our REPO_NAME req.url = req.env['SCRIPT_NAME'] if not req.url.endswith('/'): req.url += '/' if 'REPO_NAME' in req.env: req.url += req.env['REPO_NAME'] + '/' if 'PATH_INFO' in req.env: parts = req.env['PATH_INFO'].strip('/').split('/') repo_parts = req.env.get('REPO_NAME', '').split('/') if parts[:len(repo_parts)] == repo_parts: parts = parts[len(repo_parts):] query = '/'.join(parts) else: query = req.env['QUERY_STRING'].split('&', 1)[0] query = query.split(';', 1)[0] # process this if it's a protocol request # protocol bits don't need to create any URLs # and the clients always use the old URL structure cmd = req.form.get('cmd', [''])[0] if cmd and cmd in protocol.__all__: if query: raise ErrorResponse(HTTP_NOT_FOUND) try: if cmd in perms: try: self.check_perm(req, perms[cmd]) except ErrorResponse, inst: if cmd == 'unbundle': req.drain() raise method = getattr(protocol, cmd) return method(self.repo, req) except ErrorResponse, inst: req.respond(inst, protocol.HGTYPE) if not inst.message: return [] return '0\n%s\n' % inst.message, # translate user-visible url structure to internal structure args = query.split('/', 2) if 'cmd' not in req.form and args and args[0]: cmd = args.pop(0) style = cmd.rfind('-') if style != -1: req.form['style'] = [cmd[:style]] cmd = cmd[style+1:] # avoid accepting e.g. style parameter as command if hasattr(webcommands, cmd): req.form['cmd'] = [cmd] else: cmd = '' if cmd == 'static': req.form['file'] = ['/'.join(args)] else: if args and args[0]: node = args.pop(0) req.form['node'] = [node] if args: req.form['file'] = args if cmd == 'archive': fn = req.form['node'][0] for type_, spec in self.archive_specs.iteritems(): ext = spec[2] if fn.endswith(ext): req.form['node'] = [fn[:-len(ext)]] req.form['type'] = [type_] # process the web interface request try: tmpl = self.templater(req) ctype = tmpl('mimetype', encoding=encoding.encoding) ctype = templater.stringify(ctype) # check read permissions non-static content if cmd != 'static': self.check_perm(req, None) if cmd == '': req.form['cmd'] = [tmpl.cache['default']] cmd = req.form['cmd'][0] if cmd not in webcommands.__all__: msg = 'no such method: %s' % cmd raise ErrorResponse(HTTP_BAD_REQUEST, msg) elif cmd == 'file' and 'raw' in req.form.get('style', []): self.ctype = ctype content = webcommands.rawfile(self, req, tmpl) else: content = getattr(webcommands, cmd)(self, req, tmpl) req.respond(HTTP_OK, ctype) return content except error.LookupError, err: req.respond(HTTP_NOT_FOUND, ctype) msg = str(err) if 'manifest' not in msg: msg = 'revision not found: %s' % err.name return tmpl('error', error=msg) except (error.RepoError, error.RevlogError), inst: req.respond(HTTP_SERVER_ERROR, ctype) return tmpl('error', error=str(inst)) except ErrorResponse, inst: req.respond(inst, ctype) return tmpl('error', error=inst.message) def templater(self, req): # determine scheme, port and server name # this is needed to create absolute urls proto = req.env.get('wsgi.url_scheme') if proto == 'https': proto = 'https' default_port = "443" else: proto = 'http' default_port = "80" port = req.env["SERVER_PORT"] port = port != default_port and (":" + port) or "" urlbase = '%s://%s%s' % (proto, req.env['SERVER_NAME'], port) staticurl = self.config("web", "staticurl") or req.url + 'static/' if not staticurl.endswith('/'): staticurl += '/' # some functions for the templater def header(**map): yield tmpl('header', encoding=encoding.encoding, **map) def footer(**map): yield tmpl("footer", **map) def motd(**map): yield self.config("web", "motd", "") # figure out which style to use vars = {} style = self.config("web", "style", "paper") if 'style' in req.form: style = req.form['style'][0] vars['style'] = style start = req.url[-1] == '?' and '&' or '?' sessionvars = webutil.sessionvars(vars, start) mapfile = templater.stylemap(style, self.templatepath) if not self.reponame: self.reponame = (self.config("web", "name") or req.env.get('REPO_NAME') or req.url.strip('/') or self.repo.root) # create the templater tmpl = templater.templater(mapfile, defaults={"url": req.url, "staticurl": staticurl, "urlbase": urlbase, "repo": self.reponame, "header": header, "footer": footer, "motd": motd, "sessionvars": sessionvars }) return tmpl def archivelist(self, nodeid): allowed = self.configlist("web", "allow_archive") for i, spec in self.archive_specs.iteritems(): if i in allowed or self.configbool("web", "allow" + i): yield {"type" : i, "extension" : spec[2], "node" : nodeid} archive_specs = { 'bz2': ('application/x-tar', 'tbz2', '.tar.bz2', None), 'gz': ('application/x-tar', 'tgz', '.tar.gz', None), 'zip': ('application/zip', 'zip', '.zip', None), } def check_perm(self, req, op): '''Check permission for operation based on request data (including authentication info). Return if op allowed, else raise an ErrorResponse exception.''' user = req.env.get('REMOTE_USER') deny_read = self.configlist('web', 'deny_read') if deny_read and (not user or deny_read == ['*'] or user in deny_read): raise ErrorResponse(HTTP_UNAUTHORIZED, 'read not authorized') allow_read = self.configlist('web', 'allow_read') result = (not allow_read) or (allow_read == ['*']) if not (result or user in allow_read): raise ErrorResponse(HTTP_UNAUTHORIZED, 'read not authorized') if op == 'pull' and not self.allowpull: raise ErrorResponse(HTTP_UNAUTHORIZED, 'pull not authorized') elif op == 'pull' or op is None: # op is None for interface requests return # enforce that you can only push using POST requests if req.env['REQUEST_METHOD'] != 'POST': msg = 'push requires POST request' raise ErrorResponse(HTTP_METHOD_NOT_ALLOWED, msg) # require ssl by default for pushing, auth info cannot be sniffed # and replayed scheme = req.env.get('wsgi.url_scheme') if self.configbool('web', 'push_ssl', True) and scheme != 'https': raise ErrorResponse(HTTP_OK, 'ssl required') deny = self.configlist('web', 'deny_push') if deny and (not user or deny == ['*'] or user in deny): raise ErrorResponse(HTTP_UNAUTHORIZED, 'push not authorized') allow = self.configlist('web', 'allow_push') result = allow and (allow == ['*'] or user in allow) if not result: raise ErrorResponse(HTTP_UNAUTHORIZED, 'push not authorized')