# 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 httprepository(remoterepository):

    def __init__(self, ui, path):

        # fix missing / after hostname

        s = urlparse.urlsplit(path)

        partial = s[2]

        if not partial: partial = "/"

        self.url = urlparse.urlunsplit((s[0], s[1], partial, '', ''))

        self.ui = ui

        no_list = [ "localhost", "127.0.0.1" ]

        host = ui.config("http_proxy", "host")

        if host is None:

            host = os.environ.get("http_proxy")

        if host and host.startswith('http://'):

            host = host[7:]

        user = ui.config("http_proxy", "user")

        passwd = ui.config("http_proxy", "passwd")

        no = ui.config("http_proxy", "no")

        if no is None:

            no = os.environ.get("no_proxy")

        if no:

            no_list = no_list + no.split(",")

        no_proxy = 0

        for h in no_list:

            if (path.startswith("http://" + h + "/") or

                path.startswith("http://" + h + ":") or

                path == "http://" + h):

                no_proxy = 1

        # Note: urllib2 takes proxy values from the environment and those will

        # take precedence

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

            try:

                if os.environ.has_key(env):

                    del os.environ[env]

            except OSError:

                pass

        proxy_handler = urllib2.BaseHandler()

        if host and not no_proxy:

            proxy_handler = urllib2.ProxyHandler({"http" : "http://" + host})

        authinfo = None

        if user and passwd:

            passmgr = urllib2.HTTPPasswordMgrWithDefaultRealm()

            passmgr.add_password(None, host, user, passwd)

            authinfo = urllib2.ProxyBasicAuthHandler(passmgr)

        opener = urllib2.build_opener(proxy_handler, authinfo)

        # 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)

        resp = urllib2.urlopen(cu)

        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