view mercurial/hgweb/hgweb_mod.py @ 2439:e8c4f3d3df8c

extend network protocol to stop clients from locking servers

now all repositories have capabilities slot, tuple with list of names.

if 'unbundle' capability present, repo supports push where client does
not need to lock server.  repository classes that have unbundle capability
also have unbundle method.

implemented for ssh now, will be base for push over http.

unbundle protocol acts this way.  server tells client what heads it
has during normal negotiate step.  client starts unbundle by repeat
server's heads back to it.  if server has new heads, abort immediately.
otherwise, transfer changes to server.  once data transferred, server
locks and checks heads again.  if heads same, changes can be added.
else someone else added heads, and server aborts.

if client wants to force server to add heads, sends special heads list of
'force'.

# hgweb/hgweb_mod.py - Web interface for a repository.
#
# Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
# Copyright 2005 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
import os.path
import mimetypes
from mercurial.demandload import demandload
demandload(globals(), "re zlib ConfigParser cStringIO")
demandload(globals(), "mercurial:mdiff,ui,hg,util,archival,templater")
demandload(globals(), "mercurial.hgweb.request:hgrequest")
demandload(globals(), "mercurial.hgweb.common:get_mtime,staticfile")
from mercurial.node import *
from mercurial.i18n import gettext as _

def _up(p):
    if p[0] != "/":
        p = "/" + p
    if p[-1] == "/":
        p = p[:-1]
    up = os.path.dirname(p)
    if up == "/":
        return "/"
    return up + "/"

class hgweb(object):
    def __init__(self, repo, name=None):
        if type(repo) == type(""):
            self.repo = hg.repository(ui.ui(), repo)
        else:
            self.repo = repo

        self.mtime = -1
        self.reponame = name
        self.archives = 'zip', 'gz', 'bz2'
        self.templatepath = self.repo.ui.config("web", "templates",
                                                templater.templatepath())

    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.repo.ui.config("web", "maxchanges", 10))
            self.maxfiles = int(self.repo.ui.config("web", "maxfiles", 10))
            self.allowpull = self.repo.ui.configbool("web", "allowpull", True)

    def archivelist(self, nodeid):
        allowed = (self.repo.ui.config("web", "allow_archive", "")
                   .replace(",", " ").split())
        for i in self.archives:
            if i in allowed or self.repo.ui.configbool("web", "allow" + i):
                yield {"type" : i, "node" : nodeid, "url": ""}

    def listfiles(self, files, mf):
        for f in files[:self.maxfiles]:
            yield self.t("filenodelink", node=hex(mf[f]), file=f)
        if len(files) > self.maxfiles:
            yield self.t("fileellipses")

    def listfilediffs(self, files, changeset):
        for f in files[:self.maxfiles]:
            yield self.t("filedifflink", node=hex(changeset), file=f)
        if len(files) > self.maxfiles:
            yield self.t("fileellipses")

    def siblings(self, siblings=[], rev=None, hiderev=None, **args):
        if not rev:
            rev = lambda x: ""
        siblings = [s for s in siblings if s != nullid]
        if len(siblings) == 1 and rev(siblings[0]) == hiderev:
            return
        for s in siblings:
            yield dict(node=hex(s), rev=rev(s), **args)

    def renamelink(self, fl, node):
        r = fl.renamed(node)
        if r:
            return [dict(file=r[0], node=hex(r[1]))]
        return []

    def showtag(self, t1, node=nullid, **args):
        for t in self.repo.nodetags(node):
             yield self.t(t1, tag=t, **args)

    def diff(self, node1, node2, files):
        def filterfiles(filters, files):
            l = [x for x in files if x in filters]

            for t in filters:
                if t and t[-1] != os.sep:
                    t += os.sep
                l += [x for x in files if x.startswith(t)]
            return l

        parity = [0]
        def diffblock(diff, f, fn):
            yield self.t("diffblock",
                         lines=prettyprintlines(diff),
                         parity=parity[0],
                         file=f,
                         filenode=hex(fn or nullid))
            parity[0] = 1 - parity[0]

        def prettyprintlines(diff):
            for l in diff.splitlines(1):
                if l.startswith('+'):
                    yield self.t("difflineplus", line=l)
                elif l.startswith('-'):
                    yield self.t("difflineminus", line=l)
                elif l.startswith('@'):
                    yield self.t("difflineat", line=l)
                else:
                    yield self.t("diffline", line=l)

        r = self.repo
        cl = r.changelog
        mf = r.manifest
        change1 = cl.read(node1)
        change2 = cl.read(node2)
        mmap1 = mf.read(change1[0])
        mmap2 = mf.read(change2[0])
        date1 = util.datestr(change1[2])
        date2 = util.datestr(change2[2])

        modified, added, removed, deleted, unknown = r.changes(node1, node2)
        if files:
            modified, added, removed = map(lambda x: filterfiles(files, x),
                                           (modified, added, removed))

        diffopts = self.repo.ui.diffopts()
        showfunc = diffopts['showfunc']
        ignorews = diffopts['ignorews']
        for f in modified:
            to = r.file(f).read(mmap1[f])
            tn = r.file(f).read(mmap2[f])
            yield diffblock(mdiff.unidiff(to, date1, tn, date2, f,
                            showfunc=showfunc, ignorews=ignorews), f, tn)
        for f in added:
            to = None
            tn = r.file(f).read(mmap2[f])
            yield diffblock(mdiff.unidiff(to, date1, tn, date2, f,
                            showfunc=showfunc, ignorews=ignorews), f, tn)
        for f in removed:
            to = r.file(f).read(mmap1[f])
            tn = None
            yield diffblock(mdiff.unidiff(to, date1, tn, date2, f,
                            showfunc=showfunc, ignorews=ignorews), f, tn)

    def changelog(self, pos):
        def changenav(**map):
            def seq(factor, maxchanges=None):
                if maxchanges:
                    yield maxchanges
                    if maxchanges >= 20 and maxchanges <= 40:
                        yield 50
                else:
                    yield 1 * factor
                    yield 3 * factor
                for f in seq(factor * 10):
                    yield f

            l = []
            last = 0
            for f in seq(1, self.maxchanges):
                if f < self.maxchanges or f <= last:
                    continue
                if f > count:
                    break
                last = f
                r = "%d" % f
                if pos + f < count:
                    l.append(("+" + r, pos + f))
                if pos - f >= 0:
                    l.insert(0, ("-" + r, pos - f))

            yield {"rev": 0, "label": "(0)"}

            for label, rev in l:
                yield {"label": label, "rev": rev}

            yield {"label": "tip", "rev": "tip"}

        def changelist(**map):
            parity = (start - end) & 1
            cl = self.repo.changelog
            l = [] # build a list in forward order for efficiency
            for i in range(start, end):
                n = cl.node(i)
                changes = cl.read(n)
                hn = hex(n)

                l.insert(0, {"parity": parity,
                             "author": changes[1],
                             "parent": self.siblings(cl.parents(n), cl.rev,
                                                     cl.rev(n) - 1),
                             "child": self.siblings(cl.children(n), cl.rev,
                                                    cl.rev(n) + 1),
                             "changelogtag": self.showtag("changelogtag",n),
                             "manifest": hex(changes[0]),
                             "desc": changes[4],
                             "date": changes[2],
                             "files": self.listfilediffs(changes[3], n),
                             "rev": i,
                             "node": hn})
                parity = 1 - parity

            for e in l:
                yield e

        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]
        count = cl.count()
        start = max(0, pos - self.maxchanges + 1)
        end = min(count, start + self.maxchanges)
        pos = end - 1

        yield self.t('changelog',
                     changenav=changenav,
                     manifest=hex(mf),
                     rev=pos, changesets=count, entries=changelist,
                     archives=self.archivelist("tip"))

    def search(self, query):

        def changelist(**map):
            cl = self.repo.changelog
            count = 0
            qw = query.lower().split()

            def revgen():
                for i in range(cl.count() - 1, 0, -100):
                    l = []
                    for j in range(max(0, i - 100), i):
                        n = cl.node(j)
                        changes = cl.read(n)
                        l.append((n, j, changes))
                    l.reverse()
                    for e in l:
                        yield e

            for n, i, changes in revgen():
                miss = 0
                for q in qw:
                    if not (q in changes[1].lower() or
                            q in changes[4].lower() or
                            q in " ".join(changes[3][:20]).lower()):
                        miss = 1
                        break
                if miss:
                    continue

                count += 1
                hn = hex(n)

                yield self.t('searchentry',
                             parity=count & 1,
                             author=changes[1],
                             parent=self.siblings(cl.parents(n), cl.rev),
                             child=self.siblings(cl.children(n), cl.rev),
                             changelogtag=self.showtag("changelogtag",n),
                             manifest=hex(changes[0]),
                             desc=changes[4],
                             date=changes[2],
                             files=self.listfilediffs(changes[3], n),
                             rev=i,
                             node=hn)

                if count >= self.maxchanges:
                    break

        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]

        yield self.t('search',
                     query=query,
                     manifest=hex(mf),
                     entries=changelist)

    def changeset(self, nodeid):
        cl = self.repo.changelog
        n = self.repo.lookup(nodeid)
        nodeid = hex(n)
        changes = cl.read(n)
        p1 = cl.parents(n)[0]

        files = []
        mf = self.repo.manifest.read(changes[0])
        for f in changes[3]:
            files.append(self.t("filenodelink",
                                filenode=hex(mf.get(f, nullid)), file=f))

        def diff(**map):
            yield self.diff(p1, n, None)

        yield self.t('changeset',
                     diff=diff,
                     rev=cl.rev(n),
                     node=nodeid,
                     parent=self.siblings(cl.parents(n), cl.rev),
                     child=self.siblings(cl.children(n), cl.rev),
                     changesettag=self.showtag("changesettag",n),
                     manifest=hex(changes[0]),
                     author=changes[1],
                     desc=changes[4],
                     date=changes[2],
                     files=files,
                     archives=self.archivelist(nodeid))

    def filelog(self, f, filenode):
        cl = self.repo.changelog
        fl = self.repo.file(f)
        filenode = hex(fl.lookup(filenode))
        count = fl.count()

        def entries(**map):
            l = []
            parity = (count - 1) & 1

            for i in range(count):
                n = fl.node(i)
                lr = fl.linkrev(n)
                cn = cl.node(lr)
                cs = cl.read(cl.node(lr))

                l.insert(0, {"parity": parity,
                             "filenode": hex(n),
                             "filerev": i,
                             "file": f,
                             "node": hex(cn),
                             "author": cs[1],
                             "date": cs[2],
                             "rename": self.renamelink(fl, n),
                             "parent": self.siblings(fl.parents(n),
                                                     fl.rev, file=f),
                             "child": self.siblings(fl.children(n),
                                                    fl.rev, file=f),
                             "desc": cs[4]})
                parity = 1 - parity

            for e in l:
                yield e

        yield self.t("filelog", file=f, filenode=filenode, entries=entries)

    def filerevision(self, f, node):
        fl = self.repo.file(f)
        n = fl.lookup(node)
        node = hex(n)
        text = fl.read(n)
        changerev = fl.linkrev(n)
        cl = self.repo.changelog
        cn = cl.node(changerev)
        cs = cl.read(cn)
        mfn = cs[0]

        mt = mimetypes.guess_type(f)[0]
        rawtext = text
        if util.binary(text):
            mt = mt or 'application/octet-stream'
            text = "(binary:%s)" % mt
        mt = mt or 'text/plain'

        def lines():
            for l, t in enumerate(text.splitlines(1)):
                yield {"line": t,
                       "linenumber": "% 6d" % (l + 1),
                       "parity": l & 1}

        yield self.t("filerevision",
                     file=f,
                     filenode=node,
                     path=_up(f),
                     text=lines(),
                     raw=rawtext,
                     mimetype=mt,
                     rev=changerev,
                     node=hex(cn),
                     manifest=hex(mfn),
                     author=cs[1],
                     date=cs[2],
                     parent=self.siblings(fl.parents(n), fl.rev, file=f),
                     child=self.siblings(fl.children(n), fl.rev, file=f),
                     rename=self.renamelink(fl, n),
                     permissions=self.repo.manifest.readflags(mfn)[f])

    def fileannotate(self, f, node):
        bcache = {}
        ncache = {}
        fl = self.repo.file(f)
        n = fl.lookup(node)
        node = hex(n)
        changerev = fl.linkrev(n)

        cl = self.repo.changelog
        cn = cl.node(changerev)
        cs = cl.read(cn)
        mfn = cs[0]

        def annotate(**map):
            parity = 1
            last = None
            for r, l in fl.annotate(n):
                try:
                    cnode = ncache[r]
                except KeyError:
                    cnode = ncache[r] = self.repo.changelog.node(r)

                try:
                    name = bcache[r]
                except KeyError:
                    cl = self.repo.changelog.read(cnode)
                    bcache[r] = name = self.repo.ui.shortuser(cl[1])

                if last != cnode:
                    parity = 1 - parity
                    last = cnode

                yield {"parity": parity,
                       "node": hex(cnode),
                       "rev": r,
                       "author": name,
                       "file": f,
                       "line": l}

        yield self.t("fileannotate",
                     file=f,
                     filenode=node,
                     annotate=annotate,
                     path=_up(f),
                     rev=changerev,
                     node=hex(cn),
                     manifest=hex(mfn),
                     author=cs[1],
                     date=cs[2],
                     rename=self.renamelink(fl, n),
                     parent=self.siblings(fl.parents(n), fl.rev, file=f),
                     child=self.siblings(fl.children(n), fl.rev, file=f),
                     permissions=self.repo.manifest.readflags(mfn)[f])

    def manifest(self, mnode, path):
        man = self.repo.manifest
        mn = man.lookup(mnode)
        mnode = hex(mn)
        mf = man.read(mn)
        rev = man.rev(mn)
        changerev = man.linkrev(mn)
        node = self.repo.changelog.node(changerev)
        mff = man.readflags(mn)

        files = {}

        p = path[1:]
        if p and p[-1] != "/":
            p += "/"
        l = len(p)

        for f,n in mf.items():
            if f[:l] != p:
                continue
            remain = f[l:]
            if "/" in remain:
                short = remain[:remain.find("/") + 1] # bleah
                files[short] = (f, None)
            else:
                short = os.path.basename(remain)
                files[short] = (f, n)

        def filelist(**map):
            parity = 0
            fl = files.keys()
            fl.sort()
            for f in fl:
                full, fnode = files[f]
                if not fnode:
                    continue

                yield {"file": full,
                       "manifest": mnode,
                       "filenode": hex(fnode),
                       "parity": parity,
                       "basename": f,
                       "permissions": mff[full]}
                parity = 1 - parity

        def dirlist(**map):
            parity = 0
            fl = files.keys()
            fl.sort()
            for f in fl:
                full, fnode = files[f]
                if fnode:
                    continue

                yield {"parity": parity,
                       "path": os.path.join(path, f),
                       "manifest": mnode,
                       "basename": f[:-1]}
                parity = 1 - parity

        yield self.t("manifest",
                     manifest=mnode,
                     rev=rev,
                     node=hex(node),
                     path=path,
                     up=_up(path),
                     fentries=filelist,
                     dentries=dirlist,
                     archives=self.archivelist(hex(node)))

    def tags(self):
        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]

        i = self.repo.tagslist()
        i.reverse()

        def entries(notip=False, **map):
            parity = 0
            for k,n in i:
                if notip and k == "tip": continue
                yield {"parity": parity,
                       "tag": k,
                       "tagmanifest": hex(cl.read(n)[0]),
                       "date": cl.read(n)[2],
                       "node": hex(n)}
                parity = 1 - parity

        yield self.t("tags",
                     manifest=hex(mf),
                     entries=lambda **x: entries(False, **x),
                     entriesnotip=lambda **x: entries(True, **x))

    def summary(self):
        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]

        i = self.repo.tagslist()
        i.reverse()

        def tagentries(**map):
            parity = 0
            count = 0
            for k,n in i:
                if k == "tip": # skip tip
                    continue;

                count += 1
                if count > 10: # limit to 10 tags
                    break;

                c = cl.read(n)
                m = c[0]
                t = c[2]

                yield self.t("tagentry",
                             parity = parity,
                             tag = k,
                             node = hex(n),
                             date = t,
                             tagmanifest = hex(m))
                parity = 1 - parity

        def changelist(**map):
            parity = 0
            cl = self.repo.changelog
            l = [] # build a list in forward order for efficiency
            for i in range(start, end):
                n = cl.node(i)
                changes = cl.read(n)
                hn = hex(n)
                t = changes[2]

                l.insert(0, self.t(
                    'shortlogentry',
                    parity = parity,
                    author = changes[1],
                    manifest = hex(changes[0]),
                    desc = changes[4],
                    date = t,
                    rev = i,
                    node = hn))
                parity = 1 - parity

            yield l

        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]
        count = cl.count()
        start = max(0, count - self.maxchanges)
        end = min(count, start + self.maxchanges)

        yield self.t("summary",
                 desc = self.repo.ui.config("web", "description", "unknown"),
                 owner = (self.repo.ui.config("ui", "username") or # preferred
                          self.repo.ui.config("web", "contact") or # deprecated
                          self.repo.ui.config("web", "author", "unknown")), # also
                 lastchange = (0, 0), # FIXME
                 manifest = hex(mf),
                 tags = tagentries,
                 shortlog = changelist)

    def filediff(self, file, changeset):
        cl = self.repo.changelog
        n = self.repo.lookup(changeset)
        changeset = hex(n)
        p1 = cl.parents(n)[0]
        cs = cl.read(n)
        mf = self.repo.manifest.read(cs[0])

        def diff(**map):
            yield self.diff(p1, n, [file])

        yield self.t("filediff",
                     file=file,
                     filenode=hex(mf.get(file, nullid)),
                     node=changeset,
                     rev=self.repo.changelog.rev(n),
                     parent=self.siblings(cl.parents(n), cl.rev),
                     child=self.siblings(cl.children(n), cl.rev),
                     diff=diff)

    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 archive(self, req, cnode, type_):
        reponame = re.sub(r"\W+", "-", os.path.basename(self.reponame))
        name = "%s-%s" % (reponame, short(cnode))
        mimetype, artype, extension, encoding = self.archive_specs[type_]
        headers = [('Content-type', mimetype),
                   ('Content-disposition', 'attachment; filename=%s%s' %
                    (name, extension))]
        if encoding:
            headers.append(('Content-encoding', encoding))
        req.header(headers)
        archival.archive(self.repo, req.out, cnode, artype, prefix=name)

    # add tags to things
    # tags -> list of changesets corresponding to tags
    # find tag, changeset, file

    def cleanpath(self, path):
        p = util.normpath(path)
        if p[:2] == "..":
            raise Exception("suspicious path")
        return p

    def run(self, req=hgrequest()):
        def header(**map):
            yield self.t("header", **map)

        def footer(**map):
            yield self.t("footer",
                         motd=self.repo.ui.config("web", "motd", ""),
                         **map)

        def expand_form(form):
            shortcuts = {
                'cl': [('cmd', ['changelog']), ('rev', None)],
                'cs': [('cmd', ['changeset']), ('node', None)],
                'f': [('cmd', ['file']), ('filenode', None)],
                'fl': [('cmd', ['filelog']), ('filenode', None)],
                'fd': [('cmd', ['filediff']), ('node', None)],
                'fa': [('cmd', ['annotate']), ('filenode', None)],
                'mf': [('cmd', ['manifest']), ('manifest', None)],
                'ca': [('cmd', ['archive']), ('node', None)],
                'tags': [('cmd', ['tags'])],
                'tip': [('cmd', ['changeset']), ('node', ['tip'])],
                'static': [('cmd', ['static']), ('file', None)]
            }

            for k in shortcuts.iterkeys():
                if form.has_key(k):
                    for name, value in shortcuts[k]:
                        if value is None:
                            value = form[k]
                        form[name] = value
                    del form[k]

        self.refresh()

        expand_form(req.form)

        m = os.path.join(self.templatepath, "map")
        style = self.repo.ui.config("web", "style", "")
        if req.form.has_key('style'):
            style = req.form['style'][0]
        if style:
            b = os.path.basename("map-" + style)
            p = os.path.join(self.templatepath, b)
            if os.path.isfile(p):
                m = p

        port = req.env["SERVER_PORT"]
        port = port != "80" and (":" + port) or ""
        uri = req.env["REQUEST_URI"]
        if "?" in uri:
            uri = uri.split("?")[0]
        url = "http://%s%s%s" % (req.env["SERVER_NAME"], port, uri)
        if not self.reponame:
            self.reponame = (self.repo.ui.config("web", "name")
                             or uri.strip('/') or self.repo.root)

        self.t = templater.templater(m, templater.common_filters,
                                     defaults={"url": url,
                                               "repo": self.reponame,
                                               "header": header,
                                               "footer": footer,
                                               })

        if not req.form.has_key('cmd'):
            req.form['cmd'] = [self.t.cache['default'],]

        cmd = req.form['cmd'][0]

        method = getattr(self, 'do_' + cmd, None)
        if method:
            method(req)
        else:
            req.write(self.t("error"))
        req.done()

    def do_changelog(self, req):
        hi = self.repo.changelog.count() - 1
        if req.form.has_key('rev'):
            hi = req.form['rev'][0]
            try:
                hi = self.repo.changelog.rev(self.repo.lookup(hi))
            except hg.RepoError:
                req.write(self.search(hi)) # XXX redirect to 404 page?
                return

        req.write(self.changelog(hi))

    def do_changeset(self, req):
        req.write(self.changeset(req.form['node'][0]))

    def do_manifest(self, req):
        req.write(self.manifest(req.form['manifest'][0],
                                self.cleanpath(req.form['path'][0])))

    def do_tags(self, req):
        req.write(self.tags())

    def do_summary(self, req):
        req.write(self.summary())

    def do_filediff(self, req):
        req.write(self.filediff(self.cleanpath(req.form['file'][0]),
                                req.form['node'][0]))

    def do_file(self, req):
        req.write(self.filerevision(self.cleanpath(req.form['file'][0]),
                                    req.form['filenode'][0]))

    def do_annotate(self, req):
        req.write(self.fileannotate(self.cleanpath(req.form['file'][0]),
                                    req.form['filenode'][0]))

    def do_filelog(self, req):
        req.write(self.filelog(self.cleanpath(req.form['file'][0]),
                               req.form['filenode'][0]))

    def do_heads(self, req):
        resp = " ".join(map(hex, self.repo.heads())) + "\n"
        req.httphdr("application/mercurial-0.1", length=len(resp))
        req.write(resp)

    def do_branches(self, req):
        nodes = []
        if req.form.has_key('nodes'):
            nodes = map(bin, req.form['nodes'][0].split(" "))
        resp = cStringIO.StringIO()
        for b in self.repo.branches(nodes):
            resp.write(" ".join(map(hex, b)) + "\n")
        resp = resp.getvalue()
        req.httphdr("application/mercurial-0.1", length=len(resp))
        req.write(resp)

    def do_between(self, req):
        nodes = []
        if req.form.has_key('pairs'):
            pairs = [map(bin, p.split("-"))
                     for p in req.form['pairs'][0].split(" ")]
        resp = cStringIO.StringIO()
        for b in self.repo.between(pairs):
            resp.write(" ".join(map(hex, b)) + "\n")
        resp = resp.getvalue()
        req.httphdr("application/mercurial-0.1", length=len(resp))
        req.write(resp)

    def do_changegroup(self, req):
        req.httphdr("application/mercurial-0.1")
        nodes = []
        if not self.allowpull:
            return

        if req.form.has_key('roots'):
            nodes = map(bin, req.form['roots'][0].split(" "))

        z = zlib.compressobj()
        f = self.repo.changegroup(nodes, 'serve')
        while 1:
            chunk = f.read(4096)
            if not chunk:
                break
            req.write(z.compress(chunk))

        req.write(z.flush())

    def do_archive(self, req):
        changeset = self.repo.lookup(req.form['node'][0])
        type_ = req.form['type'][0]
        allowed = self.repo.ui.config("web", "allow_archive", "").split()
        if (type_ in self.archives and (type_ in allowed or
            self.repo.ui.configbool("web", "allow" + type_, False))):
            self.archive(req, changeset, type_)
            return

        req.write(self.t("error"))

    def do_static(self, req):
        fname = req.form['file'][0]
        static = self.repo.ui.config("web", "static",
                                     os.path.join(self.templatepath,
                                                  "static"))
        req.write(staticfile(static, fname)
                  or self.t("error", error="%r not found" % fname))