view sat/plugins/plugin_misc_file.py @ 2661:661f66d41215

core (xmpp): send initial presence only after all profileConnected have been treated: presence is now sent after profileConnected methods are done, this avoid to have to deal with synchronisation in connection event. For instance, PEP events should not be sent before presence is sent, so profileConnected methods can assume PEP events are not done yet, and do needed initialisation using async method if necessary. This has been done to avoid overcomplicated synchronisation in XEP-0384 plugin (network calls are needed to initialise session, but PEP events need an initialised session to be treated).
author Goffi <goffi@goffi.org>
date Sat, 11 Aug 2018 18:24:55 +0200
parents 56f94936df1e
children 003b8b4b56a7
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT plugin for file tansfer
# Copyright (C) 2009-2018 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/>.

from sat.core.i18n import _, D_
from sat.core.constants import Const as C
from sat.core.log import getLogger

log = getLogger(__name__)
from sat.core import exceptions
from sat.tools import xml_tools
from sat.tools import stream
from twisted.internet import defer
from twisted.words.protocols.jabber import jid
import os
import os.path


PLUGIN_INFO = {
    C.PI_NAME: "File Tansfer",
    C.PI_IMPORT_NAME: "FILE",
    C.PI_TYPE: C.PLUG_TYPE_MISC,
    C.PI_MODES: C.PLUG_MODE_BOTH,
    C.PI_MAIN: "FilePlugin",
    C.PI_HANDLER: "no",
    C.PI_DESCRIPTION: _(
        """File Tansfer Management:
This plugin manage the various ways of sending a file, and choose the best one."""
    ),
}


SENDING = D_(u"Please select a file to send to {peer}")
SENDING_TITLE = D_(u"File sending")
CONFIRM = D_(
    u'{peer} wants to send the file "{name}" to you:\n{desc}\n\nThe file has a size of {size_human}\n\nDo you accept ?'
)
CONFIRM_TITLE = D_(u"Confirm file transfer")
CONFIRM_OVERWRITE = D_(u"File {} already exists, are you sure you want to overwrite ?")
CONFIRM_OVERWRITE_TITLE = D_(u"File exists")
SECURITY_LIMIT = 30

PROGRESS_ID_KEY = "progress_id"


class FilePlugin(object):
    File = stream.SatFile

    def __init__(self, host):
        log.info(_("plugin File initialization"))
        self.host = host
        host.bridge.addMethod(
            "fileSend",
            ".plugin",
            in_sign="ssssa{ss}s",
            out_sign="a{ss}",
            method=self._fileSend,
            async=True,
        )
        self._file_callbacks = []
        host.importMenu(
            (D_("Action"), D_("send file")),
            self._fileSendMenu,
            security_limit=10,
            help_string=D_("Send a file"),
            type_=C.MENU_SINGLE,
        )

    def _fileSend(
        self,
        peer_jid_s,
        filepath,
        name="",
        file_desc="",
        extra=None,
        profile=C.PROF_KEY_NONE,
    ):
        client = self.host.getClient(profile)
        return self.fileSend(
            client, jid.JID(peer_jid_s), filepath, name or None, file_desc or None, extra
        )

    @defer.inlineCallbacks
    def fileSend(
        self, client, peer_jid, filepath, filename=None, file_desc=None, extra=None
    ):
        """Send a file using best available method

        @param peer_jid(jid.JID): jid of the destinee
        @param filepath(str): absolute path to the file
        @param filename(unicode, None): name to use, or None to find it from filepath
        @param file_desc(unicode, None): description of the file
        @param profile: %(doc_profile)s
        @return (dict): action dictionary, with progress id in case of success, else xmlui message
        """
        if not os.path.isfile(filepath):
            raise exceptions.DataError(u"The given path doesn't link to a file")
        if not filename:
            filename = os.path.basename(filepath) or "_"
        for namespace, callback, priority, method_name in self._file_callbacks:
            has_feature = yield self.host.hasFeature(client, namespace, peer_jid)
            if has_feature:
                log.info(
                    u"{name} method will be used to send the file".format(
                        name=method_name
                    )
                )
                progress_id = yield callback(
                    client, peer_jid, filepath, filename, file_desc, extra
                )
                defer.returnValue({"progress": progress_id})
        msg = u"Can't find any method to send file to {jid}".format(jid=peer_jid.full())
        log.warning(msg)
        defer.returnValue(
            {
                "xmlui": xml_tools.note(
                    u"Can't transfer file", msg, C.XMLUI_DATA_LVL_WARNING
                ).toXml()
            }
        )

    def _onFileChoosed(self, client, peer_jid, data):
        cancelled = C.bool(data.get("cancelled", C.BOOL_FALSE))
        if cancelled:
            return
        path = data["path"]
        return self.fileSend(client, peer_jid, path)

    def _fileSendMenu(self, data, profile):
        """ XMLUI activated by menu: return file sending UI

        @param profile: %(doc_profile)s
        """
        try:
            jid_ = jid.JID(data["jid"])
        except RuntimeError:
            raise exceptions.DataError(_("Invalid JID"))

        file_choosed_id = self.host.registerCallback(
            lambda data, profile: self._onFileChoosed(
                self.host.getClient(profile), jid_, data
            ),
            with_data=True,
            one_shot=True,
        )
        xml_ui = xml_tools.XMLUI(
            C.XMLUI_DIALOG,
            dialog_opt={
                C.XMLUI_DATA_TYPE: C.XMLUI_DIALOG_FILE,
                C.XMLUI_DATA_MESS: _(SENDING).format(peer=jid_.full()),
            },
            title=_(SENDING_TITLE),
            submit_id=file_choosed_id,
        )

        return {"xmlui": xml_ui.toXml()}

    def register(self, namespace, callback, priority=0, method_name=None):
        """Register a fileSending method

        @param namespace(unicode): XEP namespace
        @param callback(callable): method to call (must have the same signature as [fileSend])
        @param priority(int): pririoty of this method, the higher available will be used
        @param method_name(unicode): short name for the method, namespace will be used if None
        """
        for data in self._file_callbacks:
            if namespace == data[0]:
                raise exceptions.ConflictError(
                    u"A method with this namespace is already registered"
                )
        self._file_callbacks.append(
            (namespace, callback, priority, method_name or namespace)
        )
        self._file_callbacks.sort(key=lambda data: data[2], reverse=True)

    def unregister(self, namespace):
        for idx, data in enumerate(self._file_callbacks):
            if data[0] == namespace:
                del [idx]
                return
        raise exceptions.NotFound(u"The namespace to unregister doesn't exist")

    # Dialogs with user
    # the overwrite check is done here

    def openFileWrite(self, client, file_path, transfer_data, file_data, stream_object):
        """create SatFile or FileStremaObject for the requested file and fill suitable data
        """
        if stream_object:
            assert "stream_object" not in transfer_data
            transfer_data["stream_object"] = stream.FileStreamObject(
                self.host,
                client,
                file_path,
                mode="wb",
                uid=file_data[PROGRESS_ID_KEY],
                size=file_data["size"],
                data_cb=file_data.get("data_cb"),
            )
        else:
            assert "file_obj" not in transfer_data
            transfer_data["file_obj"] = stream.SatFile(
                self.host,
                client,
                file_path,
                mode="wb",
                uid=file_data[PROGRESS_ID_KEY],
                size=file_data["size"],
                data_cb=file_data.get("data_cb"),
            )

    def _gotConfirmation(
        self, data, client, peer_jid, transfer_data, file_data, stream_object
    ):
        """Called when the permission and dest path have been received

        @param peer_jid(jid.JID): jid of the file sender
        @param transfer_data(dict): same as for [self.getDestDir]
        @param file_data(dict): same as for [self.getDestDir]
        @param stream_object(bool): same as for [self.getDestDir]
        return (bool): True if copy is wanted and OK
            False if user wants to cancel
            if file exists ask confirmation and call again self._getDestDir if needed
        """
        if data.get("cancelled", False):
            return False
        path = data["path"]
        file_data["file_path"] = file_path = os.path.join(path, file_data["name"])
        log.debug(u"destination file path set to {}".format(file_path))

        # we manage case where file already exists
        if os.path.exists(file_path):

            def check_overwrite(overwrite):
                if overwrite:
                    self.openFileWrite(
                        client, file_path, transfer_data, file_data, stream_object
                    )
                    return True
                else:
                    return self.getDestDir(client, peer_jid, transfer_data, file_data)

            exists_d = xml_tools.deferConfirm(
                self.host,
                _(CONFIRM_OVERWRITE).format(file_path),
                _(CONFIRM_OVERWRITE_TITLE),
                action_extra={
                    "meta_from_jid": peer_jid.full(),
                    "meta_type": C.META_TYPE_OVERWRITE,
                    "meta_progress_id": file_data[PROGRESS_ID_KEY],
                },
                security_limit=SECURITY_LIMIT,
                profile=client.profile,
            )
            exists_d.addCallback(check_overwrite)
            return exists_d

        self.openFileWrite(client, file_path, transfer_data, file_data, stream_object)
        return True

    def getDestDir(self, client, peer_jid, transfer_data, file_data, stream_object=False):
        """Request confirmation and destination dir to user

        Overwrite confirmation is managed.
        if transfer is confirmed, 'file_obj' is added to transfer_data
        @param peer_jid(jid.JID): jid of the file sender
        @param filename(unicode): name of the file
        @param transfer_data(dict): data of the transfer session,
            it will be only used to store the file_obj.
            "file_obj" (or "stream_object") key *MUST NOT* exist before using getDestDir
        @param file_data(dict): information about the file to be transfered
            It MUST contain the following keys:
                - peer_jid (jid.JID): other peer jid
                - name (unicode): name of the file to trasnsfer
                    the name must not be empty or contain a "/" character
                - size (int): size of the file
                - desc (unicode): description of the file
                - progress_id (unicode): id to use for progression
            It *MUST NOT* contain the "peer" key
            It may contain:
                - data_cb (callable): method called on each data read/write
            "file_path" will be added to this dict once destination selected
            "size_human" will also be added with human readable file size
        @param stream_object(bool): if True, a stream_object will be used instead of file_obj
            a stream.FileStreamObject will be used
        return (defer.Deferred): True if transfer is accepted
        """
        cont, ret_value = self.host.trigger.returnPoint(
            "FILE_getDestDir", client, peer_jid, transfer_data, file_data, stream_object
        )
        if not cont:
            return ret_value
        filename = file_data["name"]
        assert filename and not "/" in filename
        assert PROGRESS_ID_KEY in file_data
        # human readable size
        file_data["size_human"] = u"{:.6n} Mio".format(
            float(file_data["size"]) / (1024 ** 2)
        )
        d = xml_tools.deferDialog(
            self.host,
            _(CONFIRM).format(peer=peer_jid.full(), **file_data),
            _(CONFIRM_TITLE),
            type_=C.XMLUI_DIALOG_FILE,
            options={C.XMLUI_DATA_FILETYPE: C.XMLUI_DATA_FILETYPE_DIR},
            action_extra={
                "meta_from_jid": peer_jid.full(),
                "meta_type": C.META_TYPE_FILE,
                "meta_progress_id": file_data[PROGRESS_ID_KEY],
            },
            security_limit=SECURITY_LIMIT,
            profile=client.profile,
        )
        d.addCallback(
            self._gotConfirmation,
            client,
            peer_jid,
            transfer_data,
            file_data,
            stream_object,
        )
        return d