# httprepo.py - HTTP repository proxy classes for mercurial

#

# Copyright 2005 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms

# of the GNU General Public License, incorporated herein by reference.

from node import *

from remoterepo import *

from i18n import gettext as _

from demandload import *

demandload(globals(), "hg os urllib urllib2 urlparse zlib util httplib")

class passwordmgr(urllib2.HTTPPasswordMgr):

    def __init__(self, ui):

        urllib2.HTTPPasswordMgr.__init__(self)

        self.ui = ui

    def find_user_password(self, realm, authuri):

        authinfo = urllib2.HTTPPasswordMgr.find_user_password(

            self, realm, authuri)

        if authinfo != (None, None):

            return authinfo

        self.ui.write(_("http authorization required\n"))

        self.ui.status(_("realm: %s\n") % realm)

        user = self.ui.prompt(_("user:"), default=None)

        passwd = self.ui.getpass()

        self.add_password(realm, authuri, user, passwd)

        return (user, passwd)

class httprepository(remoterepository):

    def __init__(self, ui, path):

        self.ui = ui

        for env in ["HTTP_PROXY", "http_proxy", "no_proxy"]:

            try:

                if os.environ.has_key(env):

                    del os.environ[env]

            except OSError:

                pass

        # 1.0 here is the _protocol_ version

        opener.addheaders = [('User-agent', 'mercurial/proto-1.0')]

        urllib2.install_opener(opener)

    def dev(self):

        return -1

    def lock(self):

        raise util.Abort(_('operation not supported over http'))

    def do_cmd(self, cmd, **args):

        self.ui.debug(_("sending %s command\n") % cmd)

        q = {"cmd": cmd}

        q.update(args)

        qs = urllib.urlencode(q)

        cu = "%s?%s" % (self.url, qs)

        try:

            resp = urllib2.urlopen(cu)

        except httplib.HTTPException, inst:

            self.ui.debug(_('http error while sending %s command\n') % cmd)

            self.ui.print_exc()

            raise IOError(None, inst)

        proto = resp.headers['content-type']

        # accept old "text/plain" and "application/hg-changegroup" for now

        if not proto.startswith('application/mercurial') and \

               not proto.startswith('text/plain') and \

               not proto.startswith('application/hg-changegroup'):

            raise hg.RepoError(_("'%s' does not appear to be an hg repository") %

                               self.url)

        if proto.startswith('application/mercurial'):

            version = proto[22:]

            if float(version) > 0.1:

                raise hg.RepoError(_("'%s' uses newer protocol %s") %

                                   (self.url, version))

        return resp

    def heads(self):

        d = self.do_cmd("heads").read()

        try:

            return map(bin, d[:-1].split(" "))

        except:

            self.ui.warn(_("unexpected response:\n") + d[:400] + "\n...\n")

            raise

    def branches(self, nodes):

        n = " ".join(map(hex, nodes))

        d = self.do_cmd("branches", nodes=n).read()

        try:

            br = [ tuple(map(bin, b.split(" "))) for b in d.splitlines() ]

            return br

        except:

            self.ui.warn(_("unexpected response:\n") + d[:400] + "\n...\n")

            raise

    def between(self, pairs):

        n = "\n".join(["-".join(map(hex, p)) for p in pairs])

        d = self.do_cmd("between", pairs=n).read()

        try:

            p = [ l and map(bin, l.split(" ")) or [] for l in d.splitlines() ]

            return p

        except:

            self.ui.warn(_("unexpected response:\n") + d[:400] + "\n...\n")

            raise

    def changegroup(self, nodes, kind):

        n = " ".join(map(hex, nodes))

        f = self.do_cmd("changegroup", roots=n)

        bytes = 0

        def zgenerator(f):

            zd = zlib.decompressobj()

            try:

                for chnk in f:

                    yield zd.decompress(chnk)

            except httplib.HTTPException, inst:

                raise IOError(None, _('connection ended unexpectedly'))

            yield zd.flush()

        return util.chunkbuffer(zgenerator(util.filechunkiter(f)))

class httpsrepository(httprepository):

    pass