view mercurial/hgweb/hgwebdir_mod.py @ 13955:86b5cc1e8be8 stable

help config: explain that config files do not exist by default

Inspired by critique given on StackOverflow where a user writes:

  I can have a good guess at what "%USERPROFILE%" might signify but
  none of the files listed in the "hg help config" output exist after
  running the installer. Previous experience would suggest that
  missing files mean something somewhere has gone seriously wrong.

  http://stackoverflow.com/questions/2329023/2351139#2351139

# 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 version 2 or any later version.

import os, re, time, urlparse
from mercurial.i18n import _
from mercurial import ui, hg, util, templater
from mercurial import error, encoding
from common import ErrorResponse, get_mtime, staticfile, paritygen, \
                   get_contact, HTTP_OK, HTTP_NOT_FOUND, HTTP_SERVER_ERROR
from hgweb_mod import hgweb
from request import wsgirequest
import webutil

def cleannames(items):
    return [(util.pconvert(name).strip('/'), path) for name, path in items]

def findrepos(paths):
    repos = []
    for prefix, root in cleannames(paths):
        roothead, roottail = os.path.split(root)
        # "foo = /bar/*" makes every subrepo of /bar/ to be
        # mounted as foo/subrepo
        # and "foo = /bar/**" also recurses into the subdirectories,
        # remember to use it without working dir.
        try:
            recurse = {'*': False, '**': True}[roottail]
        except KeyError:
            repos.append((prefix, root))
            continue
        roothead = os.path.normpath(os.path.abspath(roothead))
        paths = util.walkrepos(roothead, followsym=True, recurse=recurse)
        repos.extend(urlrepos(prefix, roothead, paths))
    return repos

def urlrepos(prefix, roothead, paths):
    """yield url paths and filesystem paths from a list of repo paths

    >>> list(urlrepos('hg', '/opt', ['/opt/r', '/opt/r/r', '/opt']))
    [('hg/r', '/opt/r'), ('hg/r/r', '/opt/r/r'), ('hg', '/opt')]
    >>> list(urlrepos('', '/opt', ['/opt/r', '/opt/r/r', '/opt']))
    [('r', '/opt/r'), ('r/r', '/opt/r/r'), ('', '/opt')]
    """
    for path in paths:
        path = os.path.normpath(path)
        yield (prefix + '/' +
               util.pconvert(path[len(roothead):]).lstrip('/')).strip('/'), path

class hgwebdir(object):
    refreshinterval = 20

    def __init__(self, conf, baseui=None):
        self.conf = conf
        self.baseui = baseui
        self.lastrefresh = 0
        self.motd = None
        self.refresh()

    def refresh(self):
        if self.lastrefresh + self.refreshinterval > time.time():
            return

        if self.baseui:
            u = self.baseui.copy()
        else:
            u = ui.ui()
            u.setconfig('ui', 'report_untrusted', 'off')
            u.setconfig('ui', 'interactive', 'off')

        if not isinstance(self.conf, (dict, list, tuple)):
            map = {'paths': 'hgweb-paths'}
            if not os.path.exists(self.conf):
                raise util.Abort(_('config file %s not found!') % self.conf)
            u.readconfig(self.conf, remap=map, trust=True)
            paths = u.configitems('hgweb-paths')
        elif isinstance(self.conf, (list, tuple)):
            paths = self.conf
        elif isinstance(self.conf, dict):
            paths = self.conf.items()

        repos = findrepos(paths)
        for prefix, root in u.configitems('collections'):
            prefix = util.pconvert(prefix)
            for path in util.walkrepos(root, followsym=True):
                repo = os.path.normpath(path)
                name = util.pconvert(repo)
                if name.startswith(prefix):
                    name = name[len(prefix):]
                repos.append((name.lstrip('/'), repo))

        self.repos = repos
        self.ui = u
        encoding.encoding = self.ui.config('web', 'encoding',
                                           encoding.encoding)
        self.style = self.ui.config('web', 'style', 'paper')
        self.templatepath = self.ui.config('web', 'templates', None)
        self.stripecount = self.ui.config('web', 'stripes', 1)
        if self.stripecount:
            self.stripecount = int(self.stripecount)
        self._baseurl = self.ui.config('web', 'baseurl')
        self.lastrefresh = time.time()

    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 read_allowed(self, ui, req):
        """Check allow_read and deny_read config options of a repo's ui object
        to determine user permissions.  By default, with neither option set (or
        both empty), allow all users to read the repo.  There are two ways a
        user can be denied read access:  (1) deny_read is not empty, and the
        user is unauthenticated or deny_read contains user (or *), and (2)
        allow_read is not empty and the user is not in allow_read.  Return True
        if user is allowed to read the repo, else return False."""

        user = req.env.get('REMOTE_USER')

        deny_read = ui.configlist('web', 'deny_read', untrusted=True)
        if deny_read and (not user or deny_read == ['*'] or user in deny_read):
            return False

        allow_read = ui.configlist('web', 'allow_read', untrusted=True)
        # by default, allow reading if no allow_read option has been set
        if (not allow_read) or (allow_read == ['*']) or (user in allow_read):
            return True

        return False

    def run_wsgi(self, req):
        try:
            try:
                self.refresh()

                virtual = req.env.get("PATH_INFO", "").strip('/')
                tmpl = self.templater(req)
                ctype = tmpl('mimetype', encoding=encoding.encoding)
                ctype = templater.stringify(ctype)

                # a static file
                if virtual.startswith('static/') or 'static' in req.form:
                    if virtual.startswith('static/'):
                        fname = virtual[7:]
                    else:
                        fname = req.form['static'][0]
                    static = templater.templatepath('static')
                    return (staticfile(static, fname, req),)

                # top-level index
                elif not virtual:
                    req.respond(HTTP_OK, ctype)
                    return self.makeindex(req, tmpl)

                # nested indexes and hgwebs

                repos = dict(self.repos)
                virtualrepo = virtual
                while virtualrepo:
                    real = repos.get(virtualrepo)
                    if real:
                        req.env['REPO_NAME'] = virtualrepo
                        try:
                            repo = hg.repository(self.ui, real)
                            return hgweb(repo).run_wsgi(req)
                        except IOError, inst:
                            msg = inst.strerror
                            raise ErrorResponse(HTTP_SERVER_ERROR, msg)
                        except error.RepoError, inst:
                            raise ErrorResponse(HTTP_SERVER_ERROR, str(inst))

                    up = virtualrepo.rfind('/')
                    if up < 0:
                        break
                    virtualrepo = virtualrepo[:up]

                # browse subdirectories
                subdir = virtual + '/'
                if [r for r in repos if r.startswith(subdir)]:
                    req.respond(HTTP_OK, ctype)
                    return self.makeindex(req, tmpl, subdir)

                # prefixes not found
                req.respond(HTTP_NOT_FOUND, ctype)
                return tmpl("notfound", repo=virtual)

            except ErrorResponse, err:
                req.respond(err, ctype)
                return tmpl('error', error=err.message or '')
        finally:
            tmpl = None

    def makeindex(self, req, tmpl, subdir=""):

        def archivelist(ui, nodeid, url):
            allowed = ui.configlist("web", "allow_archive", untrusted=True)
            archives = []
            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):
                    archives.append({"type" : i[0], "extension": i[1],
                                     "node": nodeid, "url": url})
            return archives

        def rawentries(subdir="", **map):

            descend = self.ui.configbool('web', 'descend', True)
            for name, path in self.repos:

                if not name.startswith(subdir):
                    continue
                name = name[len(subdir):]
                if not descend and '/' in name:
                    continue

                u = self.ui.copy()
                try:
                    u.readconfig(os.path.join(path, '.hg', 'hgrc'))
                except Exception, e:
                    u.warn(_('error reading %s/.hg/hgrc: %s\n') % (path, e))
                    continue
                def get(section, name, default=None):
                    return u.config(section, name, default, untrusted=True)

                if u.configbool("web", "hidden", untrusted=True):
                    continue

                if not self.read_allowed(u, req):
                    continue

                parts = [name]
                if 'PATH_INFO' in req.env:
                    parts.insert(0, req.env['PATH_INFO'].rstrip('/'))
                if req.env['SCRIPT_NAME']:
                    parts.insert(0, req.env['SCRIPT_NAME'])
                url = re.sub(r'/+', '/', '/'.join(parts) + '/')

                # update time with local timezone
                try:
                    r = hg.repository(self.ui, path)
                except error.RepoError:
                    u.warn(_('error accessing repository at %s\n') % path)
                    continue
                try:
                    d = (get_mtime(r.spath), util.makedate()[1])
                except OSError:
                    continue

                contact = get_contact(get)
                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],
                           archives=archivelist(u, "tip", url))
                yield row

        sortdefault = None, False
        def entries(sortcolumn="", descending=False, subdir="", **map):
            rows = rawentries(subdir=subdir, **map)

            if sortcolumn and sortdefault != (sortcolumn, descending):
                sortkey = '%s_sort' % sortcolumn
                rows = sorted(rows, key=lambda x: x[sortkey],
                              reverse=descending)
            for row, parity in zip(rows, paritygen(self.stripecount)):
                row['parity'] = parity
                yield row

        self.refresh()
        sortable = ["name", "description", "contact", "lastchange"]
        sortcolumn, descending = sortdefault
        if 'sort' in req.form:
            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]

        self.refresh()
        self.updatereqenv(req.env)

        return tmpl("index", entries=entries, subdir=subdir,
                    sortcolumn=sortcolumn, descending=descending,
                    **dict(sort))

    def templater(self, req):

        def header(**map):
            yield tmpl('header', encoding=encoding.encoding, **map)

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

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

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

        self.updatereqenv(req.env)

        url = req.env.get('SCRIPT_NAME', '')
        if not url.endswith('/'):
            url += '/'

        vars = {}
        styles = (
            req.form.get('style', [None])[0],
            config('web', 'style'),
            'paper'
        )
        style, mapfile = templater.stylemap(styles, self.templatepath)
        if style == styles[0]:
            vars['style'] = style

        start = url[-1] == '?' and '&' or '?'
        sessionvars = webutil.sessionvars(vars, start)
        staticurl = config('web', 'staticurl') or url + 'static/'
        if not staticurl.endswith('/'):
            staticurl += '/'

        tmpl = templater.templater(mapfile,
                                   defaults={"header": header,
                                             "footer": footer,
                                             "motd": motd,
                                             "url": url,
                                             "staticurl": staticurl,
                                             "sessionvars": sessionvars})
        return tmpl

    def updatereqenv(self, env):
        def splitnetloc(netloc):
            if ':' in netloc:
                return netloc.split(':', 1)
            else:
                return (netloc, None)

        if self._baseurl is not None:
            urlcomp = urlparse.urlparse(self._baseurl)
            host, port = splitnetloc(urlcomp[1])
            path = urlcomp[2]
            env['SERVER_NAME'] = host
            if port:
                env['SERVER_PORT'] = port
            env['SCRIPT_NAME'] = path