view mercurial/hgweb/hgwebdir_mod.py @ 4095:6fa7a2d0fc2e

hgweb: catch util.Abort raised by addchangegroup

Right now, if a pretxnchangegroup hook fails, we send some HTML
error message to the client and the transaction is not rolled back
(issue499).

Catching util.Abort allows us to send a decent message to the client
and for some reason makes the rollback complete.

This patch is not perfect since it doesn't fix the reason why the
transaction wasn't rolled back (maybe some circular references?).
Also, the transaction is aborted only after we've sent the response
back to the client and the "transaction aborted" message ends up in
the logs of the web server.

# hgweb/hgwebdir_mod.py - Web interface for a directory of repositories.
#
# Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
# Copyright 2005, 2006 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

import os
from mercurial.demandload import demandload
demandload(globals(), "mimetools cStringIO")
demandload(globals(), "mercurial:ui,hg,util,templater")
demandload(globals(), "mercurial.hgweb.hgweb_mod:hgweb")
demandload(globals(), "mercurial.hgweb.common:get_mtime,staticfile,style_map")
from mercurial.i18n import gettext as _

# This is a stopgap
class hgwebdir(object):
    def __init__(self, config, parentui=None):
        def cleannames(items):
            return [(name.strip(os.sep), path) for name, path in items]

        self.parentui = parentui
        self.motd = None
        self.style = None
        self.repos_sorted = ('name', False)
        if isinstance(config, (list, tuple)):
            self.repos = cleannames(config)
            self.repos_sorted = ('', False)
        elif isinstance(config, dict):
            self.repos = cleannames(config.items())
            self.repos.sort()
        else:
            cp = util.configparser()
            cp.read(config)
            self.repos = []
            if cp.has_section('web'):
                if cp.has_option('web', 'motd'):
                    self.motd = cp.get('web', 'motd')
                if cp.has_option('web', 'style'):
                    self.style = cp.get('web', 'style')
            if cp.has_section('paths'):
                self.repos.extend(cleannames(cp.items('paths')))
            if cp.has_section('collections'):
                for prefix, root in cp.items('collections'):
                    for path in util.walkrepos(root):
                        repo = os.path.normpath(path)
                        name = repo
                        if name.startswith(prefix):
                            name = name[len(prefix):]
                        self.repos.append((name.lstrip(os.sep), repo))
            self.repos.sort()

    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
        from request import wsgiapplication
        def make_web_app():
            return self
        wsgicgi.launch(wsgiapplication(make_web_app))

    def run_wsgi(self, req):
        def header(**map):
            header_file = cStringIO.StringIO(
                ''.join(tmpl("header", encoding=util._encoding, **map)))
            msg = mimetools.Message(header_file, 0)
            req.header(msg.items())
            yield header_file.read()

        def footer(**map):
            yield tmpl("footer", **map)

        def motd(**map):
            if self.motd is not None:
                yield self.motd
            else:
                yield config('web', 'motd', '')

        parentui = self.parentui or ui.ui(report_untrusted=False)

        def config(section, name, default=None, untrusted=True):
            return parentui.config(section, name, default, untrusted)

        url = req.env['REQUEST_URI'].split('?')[0]
        if not url.endswith('/'):
            url += '/'

        style = self.style
        if style is None:
            style = config('web', 'style', '')
        if req.form.has_key('style'):
            style = req.form['style'][0]
        mapfile = style_map(templater.templatepath(), style)
        tmpl = templater.templater(mapfile, templater.common_filters,
                                   defaults={"header": header,
                                             "footer": footer,
                                             "motd": motd,
                                             "url": url})

        def archivelist(ui, nodeid, url):
            allowed = ui.configlist("web", "allow_archive", untrusted=True)
            for i in [('zip', '.zip'), ('gz', '.tar.gz'), ('bz2', '.tar.bz2')]:
                if i[0] in allowed or ui.configbool("web", "allow" + i[0],
                                                    untrusted=True):
                    yield {"type" : i[0], "extension": i[1],
                           "node": nodeid, "url": url}

        def entries(sortcolumn="", descending=False, **map):
            def sessionvars(**map):
                fields = []
                if req.form.has_key('style'):
                    style = req.form['style'][0]
                    if style != get('web', 'style', ''):
                        fields.append(('style', style))

                separator = url[-1] == '?' and ';' or '?'
                for name, value in fields:
                    yield dict(name=name, value=value, separator=separator)
                    separator = ';'

            rows = []
            parity = 0
            for name, path in self.repos:
                u = ui.ui(parentui=parentui)
                try:
                    u.readconfig(os.path.join(path, '.hg', 'hgrc'))
                except IOError:
                    pass
                def get(section, name, default=None):
                    return u.config(section, name, default, untrusted=True)

                url = ('/'.join([req.env["REQUEST_URI"].split('?')[0], name])
                       .replace("//", "/")) + '/'

                # update time with local timezone
                try:
                    d = (get_mtime(path), util.makedate()[1])
                except OSError:
                    continue

                contact = (get("ui", "username") or # preferred
                           get("web", "contact") or # deprecated
                           get("web", "author", "")) # also
                description = get("web", "description", "")
                name = get("web", "name", name)
                row = dict(contact=contact or "unknown",
                           contact_sort=contact.upper() or "unknown",
                           name=name,
                           name_sort=name,
                           url=url,
                           description=description or "unknown",
                           description_sort=description.upper() or "unknown",
                           lastchange=d,
                           lastchange_sort=d[1]-d[0],
                           sessionvars=sessionvars,
                           archives=archivelist(u, "tip", url))
                if (not sortcolumn
                    or (sortcolumn, descending) == self.repos_sorted):
                    # fast path for unsorted output
                    row['parity'] = parity
                    parity = 1 - parity
                    yield row
                else:
                    rows.append((row["%s_sort" % sortcolumn], row))
            if rows:
                rows.sort()
                if descending:
                    rows.reverse()
                for key, row in rows:
                    row['parity'] = parity
                    parity = 1 - parity
                    yield row

        virtual = req.env.get("PATH_INFO", "").strip('/')
        if virtual.startswith('static/'):
            static = os.path.join(templater.templatepath(), 'static')
            fname = virtual[7:]
            req.write(staticfile(static, fname, req) or
                      tmpl('error', error='%r not found' % fname))
        elif virtual:
            while virtual:
                real = dict(self.repos).get(virtual)
                if real:
                    break
                up = virtual.rfind('/')
                if up < 0:
                    break
                virtual = virtual[:up]
            if real:
                req.env['REPO_NAME'] = virtual
                try:
                    repo = hg.repository(parentui, real)
                    hgweb(repo).run_wsgi(req)
                except IOError, inst:
                    req.write(tmpl("error", error=inst.strerror))
                except hg.RepoError, inst:
                    req.write(tmpl("error", error=str(inst)))
            else:
                req.write(tmpl("notfound", repo=virtual))
        else:
            if req.form.has_key('static'):
                static = os.path.join(templater.templatepath(), "static")
                fname = req.form['static'][0]
                req.write(staticfile(static, fname, req)
                          or tmpl("error", error="%r not found" % fname))
            else:
                sortable = ["name", "description", "contact", "lastchange"]
                sortcolumn, descending = self.repos_sorted
                if req.form.has_key('sort'):
                    sortcolumn = req.form['sort'][0]
                    descending = sortcolumn.startswith('-')
                    if descending:
                        sortcolumn = sortcolumn[1:]
                    if sortcolumn not in sortable:
                        sortcolumn = ""

                sort = [("sort_%s" % column,
                         "%s%s" % ((not descending and column == sortcolumn)
                                   and "-" or "", column))
                        for column in sortable]
                req.write(tmpl("index", entries=entries,
                               sortcolumn=sortcolumn, descending=descending,
                               **dict(sort)))