view mercurial/httprepo.py @ 2320:dbdce3b99988

fix parsing of tags. make parse errors useful. add new tag tests.

old code read every head of .hgtags. delete and recreate of .hgtags gave
new head, but if error in deleted rev, .hgtags had error messages every
time it was parsed. this was very hard to fix, because deleted revs hard
to get back and update, needed merges too.

new code reads .hgtags on every head. advantage is if parse error
happens with new code, is possible to fix them by editing .hgtags on a
head and committing.

NOTE: new code uses binary search of manifest of each head to be fast,
but still much slower than old code. best thing would be to have delete
record stored in filelog so we never touch manifest. could find live
heads directly from filelog. this is more work than i want now.

new tests check for parse of tags on different heads, and inaccessible
heads created by delete and recreate of .hgtags.

# httprepo.py - HTTP repository proxy classes for mercurial
#
# 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.

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):
        # 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})

        proxyauthinfo = None
        if user and passwd:
            passmgr = urllib2.HTTPPasswordMgrWithDefaultRealm()
            passmgr.add_password(None, host, user, passwd)
            proxyauthinfo = urllib2.ProxyBasicAuthHandler(passmgr)

        if ui.interactive:
            passmgr = passwordmgr(ui)
            opener = urllib2.build_opener(
                proxy_handler, proxyauthinfo,
                urllib2.HTTPBasicAuthHandler(passmgr),
                urllib2.HTTPDigestAuthHandler(passmgr))
        else:
            opener = urllib2.build_opener(proxy_handler, proxyauthinfo)

        # 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:
            raise IOError(None, _('http error while sending %s command') % cmd)
        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