view sat/tools/common/uri.py @ 3330:7b47f48d31f3

plugin XEP-0264: fix orientation of thumbnails: Rotation of thumbnailis is now modified according to EXIF orientation data. Original image is not modified as user may want to keep it, and orientation transformation can modify encoding parameters. Update `pillow` minimum version to the first one with `exif_transpose` implementation.
author Goffi <goffi@goffi.org>
date Thu, 13 Aug 2020 23:46:18 +0200
parents 559a625a236b
children be6d91572633
line wrap: on
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#!/usr/bin/env python3


# SAT: a jabber client
# Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

""" XMPP uri parsing tools """

import urllib.parse
import urllib.request, urllib.parse, urllib.error

# FIXME: basic implementation, need to follow RFC 5122


def parseXMPPUri(uri):
    """Parse an XMPP uri and return a dict with various information

    @param uri(unicode): uri to parse
    @return dict(unicode, unicode): data depending of the URI where key can be:
        type: one of ("pubsub", TODO)
            type is always present
        sub_type: can be:
            - microblog
            only used for pubsub for now
        path: XMPP path (jid of the service or entity)
        node: node used
        id: id of the element (item for pubsub)
    @raise ValueError: the scheme is not xmpp
    """
    uri_split = urllib.parse.urlsplit(uri)
    if uri_split.scheme != "xmpp":
        raise ValueError("this is not a XMPP URI")

    # XXX: we don't use jid.JID for path as it can be used both in backend and frontend
    # which may use different JID classes
    data = {"path": urllib.parse.unquote(uri_split.path)}

    query_end = uri_split.query.find(";")
    query_type = uri_split.query[:query_end]
    if query_end == -1 or "=" in query_type:
        raise ValueError("no query type, invalid XMPP URI")

    pairs = urllib.parse.parse_qs(uri_split.geturl())
    for k, v in list(pairs.items()):
        if len(v) != 1:
            raise NotImplementedError("multiple values not managed")
        if k in ("path", "type", "sub_type"):
            raise NotImplementedError("reserved key used in URI, this is not supported")
        data[k] = urllib.parse.unquote(v[0])

    if query_type:
        data["type"] = query_type
    elif "node" in data:
        data["type"] = "pubsub"
    else:
        data["type"] = ""

    if "node" in data:
        if data["node"].startswith("urn:xmpp:microblog:"):
            data["sub_type"] = "microblog"

    return data


def addPairs(uri, pairs):
    for k, v in pairs.items():
        uri.append(
            ";"
            + urllib.parse.quote_plus(k.encode("utf-8"))
            + "="
            + urllib.parse.quote_plus(v.encode("utf-8"))
        )


def buildXMPPUri(type_, **kwargs):
    uri = ["xmpp:"]
    subtype = kwargs.pop("subtype", None)
    path = kwargs.pop("path")
    uri.append(urllib.parse.quote_plus(path.encode("utf-8")).replace("%40", "@"))

    if type_ == "pubsub":
        if subtype == "microblog" and not kwargs.get("node"):
            kwargs["node"] = "urn:xmpp:microblog:0"
        if kwargs:
            uri.append("?")
            addPairs(uri, kwargs)
    else:
        raise NotImplementedError("{type_} URI are not handled yet".format(type_=type_))

    return "".join(uri)