view sat/plugins/plugin_misc_upload.py @ 2646:712cb4ff3e13

core: new EncryptionHandler class which manage encrypted session as a core feature: Plugin handling encryption can now register using host.registerEncryptionPlugin, and an encryption session can now be started using messageEncryptionStart bridge method. This will make encryption handling more easy, as we now know if a session is clear or e2e encrypted, and which plugin handle it.
author Goffi <goffi@goffi.org>
date Sun, 29 Jul 2018 19:22:56 +0200
parents 56f94936df1e
children 378188abe941
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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 twisted.internet import defer
from twisted.words.protocols.jabber import jid
import os
import os.path


PLUGIN_INFO = {
    C.PI_NAME: "File Upload",
    C.PI_IMPORT_NAME: "UPLOAD",
    C.PI_TYPE: C.PLUG_TYPE_MISC,
    C.PI_MAIN: "UploadPlugin",
    C.PI_HANDLER: "no",
    C.PI_DESCRIPTION: _("""File upload management"""),
}


UPLOADING = D_(u"Please select a file to upload")
UPLOADING_TITLE = D_(u"File upload")
BOOL_OPTIONS = ("ignore_tls_errors",)


class UploadPlugin(object):
    # TODO: plugin unload

    def __init__(self, host):
        log.info(_("plugin Upload initialization"))
        self.host = host
        host.bridge.addMethod(
            "fileUpload",
            ".plugin",
            in_sign="sssa{ss}s",
            out_sign="a{ss}",
            method=self._fileUpload,
            async=True,
        )
        self._upload_callbacks = []

    def _fileUpload(
        self, filepath, filename, upload_jid_s="", options=None, profile=C.PROF_KEY_NONE
    ):
        client = self.host.getClient(profile)
        upload_jid = jid.JID(upload_jid_s) if upload_jid_s else None
        if options is None:
            options = {}
        # we convert values that are well-known booleans
        for bool_option in BOOL_OPTIONS:
            try:
                options[bool_option] = C.bool(options[bool_option])
            except KeyError:
                pass

        return self.fileUpload(
            client, filepath, filename or None, upload_jid, options or None
        )

    def fileUpload(self, client, filepath, filename, upload_jid, options):
        """Send a file using best available method

        parameters are the same as for [upload]
        @return (dict): action dictionary, with progress id in case of success, else xmlui message
        """

        def uploadCb(data):
            progress_id, dummy = data
            return {"progress": progress_id}

        def uploadEb(fail):
            msg = unicode(fail)
            log.warning(msg)
            return {
                "xmlui": xml_tools.note(
                    u"Can't upload file", msg, C.XMLUI_DATA_LVL_WARNING
                ).toXml()
            }

        d = self.upload(client, filepath, filename, upload_jid, options)
        d.addCallback(uploadCb)
        d.addErrback(uploadEb)
        return d

    @defer.inlineCallbacks
    def upload(self, client, filepath, filename=None, upload_jid=None, options=None):
        """Send a file using best available method

        @param filepath(str): absolute path to the file
        @param filename(None, unicode): name to use for the upload
            None to use basename of the path
        @param upload_jid(jid.JID, None): upload capable entity jid,
            or None to use autodetected, if possible
        @param options(dict): option to use for the upload, may be:
            - ignore_tls_errors(bool): True to ignore SSL/TLS certificate verification
                used only if HTTPS transport is needed
        @param profile: %(doc_profile)s
        @return (tuple[unicode,D(unicode)]): progress_id and a Deferred which fire download URL
            when upload is finished
        """
        if options is None:
            options = {}
        if not os.path.isfile(filepath):
            raise exceptions.DataError(u"The given path doesn't link to a file")
        for method_name, available_cb, upload_cb, priority in self._upload_callbacks:
            try:
                upload_jid = yield available_cb(upload_jid, client.profile)
            except exceptions.NotFound:
                continue  # no entity managing this extension found

            log.info(
                u"{name} method will be used to upload the file".format(name=method_name)
            )
            progress_id_d, download_d = yield upload_cb(
                filepath, filename, upload_jid, options, client.profile
            )
            progress_id = yield progress_id_d
            defer.returnValue((progress_id, download_d))

        raise exceptions.NotFound(u"Can't find any method to upload a file")

    def register(self, method_name, available_cb, upload_cb, priority=0):
        """Register a fileUploading method

        @param method_name(unicode): short name for the method, must be unique
        @param available_cb(callable): method to call to check if this method is usable
           the callback must take two arguments: upload_jid (can be None) and profile
           the callback must return the first entity found (being upload_jid or one of its components)
           exceptions.NotFound must be raised if no entity has been found
        @param upload_cb(callable): method to upload a file
            must have the same signature as [fileUpload]
            must return a tuple with progress_id and a Deferred which fire download URL when
            upload is finished
        @param priority(int): pririoty of this method, the higher available will be used
        """
        assert method_name
        for data in self._upload_callbacks:
            if method_name == data[0]:
                raise exceptions.ConflictError(
                    u"A method with this name is already registered"
                )
        self._upload_callbacks.append((method_name, available_cb, upload_cb, priority))
        self._upload_callbacks.sort(key=lambda data: data[3], reverse=True)

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