import platform from datetime import datetime, timedelta from hashlib import md5 from mimetypes import guess_type from os import listdir, path # Import some externalized utilities to work with the Telegram types and more import telethon.helpers as utils import telethon.network.authenticator as authenticator from telethon.errors import * from telethon.network import MtProtoSender, TcpTransport from telethon.parser.markdown_parser import parse_message_entities # For sending and receiving requests from telethon.tl import MTProtoRequest, Session from telethon.tl.all_tlobjects import layer from telethon.tl.functions import InitConnectionRequest, InvokeWithLayerRequest # The following is required to get the password salt from telethon.tl.functions.account import GetPasswordRequest from telethon.tl.functions.auth import (CheckPasswordRequest, LogOutRequest, SendCodeRequest, SignInRequest, SignUpRequest) from telethon.tl.functions.help import GetConfigRequest from telethon.tl.functions.messages import ( GetDialogsRequest, GetHistoryRequest, ReadHistoryRequest, SendMediaRequest, SendMessageRequest) # The Requests and types that we'll be using from telethon.tl.functions.upload import ( GetFileRequest, SaveBigFilePartRequest, SaveFilePartRequest) # All the types we need to work with from telethon.tl.types import ( ChatPhotoEmpty, DocumentAttributeAudio, DocumentAttributeFilename, InputDocumentFileLocation, InputFile, InputFileLocation, InputMediaUploadedDocument, InputMediaUploadedPhoto, InputPeerEmpty, MessageMediaContact, MessageMediaDocument, MessageMediaPhoto, UserProfilePhotoEmpty) from telethon.utils import (find_user_or_chat, get_input_peer, get_appropiate_part_size, get_extension) class TelegramClient: # Current TelegramClient version __version__ = '0.7' # region Initialization def __init__(self, session, api_id, api_hash): """Initializes the Telegram client with the specified API ID and Hash. Session can either be a `str` object (the filename for the loaded/saved .session) or it can be a `Session` instance (in which case list_sessions() would probably not work). If you don't want any file to be saved, pass `None` In the later case, you are free to override the `Session` class to provide different .save() and .load() implementations to suit your needs.""" if api_id is None or api_hash is None: raise PermissionError( 'Your API ID or Hash are invalid. Please read "Requirements" on README.rst') self.api_id = api_id self.api_hash = api_hash # Determine what session object we have if isinstance(session, str): self.session = Session.try_load_or_create_new(session) elif isinstance(session, Session): self.session = session else: raise ValueError( 'The given session must either be a string or a Session instance.') self.transport = TcpTransport(self.session.server_address, self.session.port) # These will be set later self.dc_options = None self.sender = None self.phone_code_hashes = {} # We need to be signed in before we can listen for updates self.signed_in = False # endregion # region Connecting def connect(self, reconnect=False): """Connects to the Telegram servers, executing authentication if required. Note that authenticating to the Telegram servers is not the same as authenticating the app, which requires to send a code first.""" try: if not self.session.auth_key or reconnect: self.session.auth_key, self.session.time_offset = \ authenticator.do_authentication(self.transport) self.session.save() self.sender = MtProtoSender(self.transport, self.session) # Now it's time to send an InitConnectionRequest # This must always be invoked with the layer we'll be using query = InitConnectionRequest( api_id=self.api_id, device_model=platform.node(), system_version=platform.system(), app_version=self.__version__, lang_code='en', query=GetConfigRequest()) result = self.invoke( InvokeWithLayerRequest( layer=layer, query=query)) # We're only interested in the DC options, # although many other options are available! self.dc_options = result.dc_options # We can now enable these (for such methods such as logout) self.sender.ack_requests_confirm = True # We're signed in if we're authorized self.signed_in = self.is_user_authorized() return True except RPCError as error: print('Could not stabilise initial connection: {}'.format(error)) return False def reconnect_to_dc(self, dc_id): """Reconnects to the specified DC ID. This is automatically called after an InvalidDCError is raised""" if self.dc_options is None or not self.dc_options: raise ConnectionError( "Can't reconnect. Stabilise an initial connection first.") dc = next(dc for dc in self.dc_options if dc.id == dc_id) self.transport.close() self.transport = TcpTransport(dc.ip_address, dc.port) self.session.server_address = dc.ip_address self.session.port = dc.port self.session.save() self.connect(reconnect=True) def disconnect(self): """Disconnects from the Telegram server **and pauses all the spawned threads**""" if self.sender: self.sender.disconnect() # endregion # region Telegram requests functions def invoke(self, request, timeout=timedelta(seconds=5)): """Invokes a MTProtoRequest (sends and receives it) and returns its result. An optional timeout can be given to cancel the operation after the time delta. Timeout can be set to None for no timeout""" if not issubclass(type(request), MTProtoRequest): raise ValueError('You can only invoke MtProtoRequests') self.sender.send(request) self.sender.receive(request, timeout) return request.result # region Authorization requests def is_user_authorized(self): """Has the user been authorized yet (code request sent and confirmed)? Note that this will NOT yield the correct result if the session was revoked by another client!""" return self.session.user is not None def send_code_request(self, phone_number): """Sends a code request to the specified phone number""" request = SendCodeRequest(phone_number, self.api_id, self.api_hash) completed = False while not completed: try: result = self.invoke(request) self.phone_code_hashes[phone_number] = result.phone_code_hash completed = True except InvalidDCError as error: self.reconnect_to_dc(error.new_dc) def sign_in(self, phone_number=None, code=None, password=None): """Completes the authorization of a phone number by providing the received code. If no phone or code is provided, then the sole password will be used. The password should be used after a normal authorization attempt has happened and an RPCError with `.password_required = True` was raised""" if phone_number and code: if phone_number not in self.phone_code_hashes: raise ValueError( 'Please make sure you have called send_code_request first.') try: result = self.invoke( SignInRequest(phone_number, self.phone_code_hashes[ phone_number], code)) except RPCError as error: if error.message.startswith('PHONE_CODE_'): print(error) return False else: raise error elif password: salt = self.invoke(GetPasswordRequest()).current_salt result = self.invoke( CheckPasswordRequest(utils.get_password_hash(password, salt))) else: raise ValueError( 'You must provide a phone_number and a code for the first time, ' 'and a password only if an RPCError was raised before.') # Result is an Auth.Authorization TLObject self.session.user = result.user self.session.save() # Now that we're authorized, set the signed_in flag # to True so update handlers can be added self.signed_in = True return True def sign_up(self, phone_number, code, first_name, last_name=''): """Signs up to Telegram. Make sure you sent a code request first!""" result = self.invoke( SignUpRequest( phone_number=phone_number, phone_code_hash=self.phone_code_hashes[phone_number], phone_code=code, first_name=first_name, last_name=last_name)) self.session.user = result.user self.session.save() def log_out(self): """Logs out and deletes the current session. Returns True if everything went OK""" try: self.invoke(LogOutRequest()) if not self.session.delete(): return False self.session = None except: return False @staticmethod def list_sessions(): """Lists all the sessions of the users who have ever connected using this client and never logged out""" return [path.splitext(path.basename(f))[ 0] # splitext = split ext (not spli text!) for f in listdir('.') if f.endswith('.session')] # endregion # region Dialogs ("chats") requests def get_dialogs(self, count=10, offset_date=None, offset_id=0, offset_peer=InputPeerEmpty()): """Returns a tuple of lists ([dialogs], [entities]) with 'count' items each. The `entity` represents the user, chat or channel corresponding to that dialog""" r = self.invoke( GetDialogsRequest( offset_date=offset_date, offset_id=offset_id, offset_peer=offset_peer, limit=count)) return ( r.dialogs, [find_user_or_chat(d.peer, r.users, r.chats) for d in r.dialogs]) # endregion # region Message requests def send_message(self, entity, message, markdown=False, no_web_page=False): """Sends a message to the given entity (or input peer) and returns the sent message ID""" if markdown: msg, entities = parse_message_entities(message) else: msg, entities = message, [] msg_id = utils.generate_random_long() self.invoke( SendMessageRequest( peer=get_input_peer(entity), message=msg, random_id=msg_id, entities=entities, no_webpage=no_web_page)) return msg_id def get_message_history(self, entity, limit=20, offset_date=None, offset_id=0, max_id=0, min_id=0, add_offset=0): """ Gets the message history for the specified entity :param entity: The entity (or input peer) from whom to retrieve the message history :param limit: Number of messages to be retrieved :param offset_date: Offset date (messages *previous* to this date will be retrieved) :param offset_id: Offset message ID (only messages *previous* to the given ID will be retrieved) :param max_id: All the messages with a higher (newer) ID or equal to this will be excluded :param min_id: All the messages with a lower (older) ID or equal to this will be excluded :param add_offset: Additional message offset (all of the specified offsets + this offset = older messages) :return: A tuple containing total message count and two more lists ([messages], [senders]). Note that the sender can be null if it was not found! """ result = self.invoke( GetHistoryRequest( get_input_peer(entity), limit=limit, offset_date=offset_date, offset_id=offset_id, max_id=max_id, min_id=min_id, add_offset=add_offset)) # The result may be a messages slice (not all messages were retrieved) or # simply a messages TLObject. In the later case, no "count" attribute is specified: # the total messages count is retrieved by counting all the retrieved messages total_messages = getattr(result, 'count', len(result.messages)) # Iterate over all the messages and find the sender User users = [] for msg in result.messages: for usr in result.users: if msg.from_id == usr.id: users.append(usr) break return total_messages, result.messages, users def send_read_acknowledge(self, entity, messages=None, max_id=None): """Sends a "read acknowledge" (i.e., notifying the given peer that we've read their messages, also known as the "double check ✅✅"). Either a list of messages (or a single message) can be given, or the maximum message ID (until which message we want to send the read acknowledge). Returns an AffectedMessages TLObject""" if max_id is None: if not messages: raise InvalidParameterError( 'Either a message list or a max_id must be provided.') if isinstance(messages, list): max_id = max(msg.id for msg in messages) else: max_id = messages.id return self.invoke(ReadHistoryRequest(peer=get_input_peer(entity), max_id=max_id)) # endregion # TODO Handle media downloading/uploading in a different session? # "It is recommended that large queries (upload.getFile, upload.saveFilePart) # be handled through a separate session and a separate connection" # region Uploading media requests def upload_file(self, file_path, part_size_kb=None, file_name=None, progress_callback=None): """Uploads the specified file_path and returns a handle which can be later used :param file_path: The file path of the file that will be uploaded :param part_size_kb: The part size when uploading the file. None = Automatic :param file_name: The name of the uploaded file. None = Automatic :param progress_callback: A callback function which takes two parameters, uploaded size (in bytes) and total file size (in bytes) This is called every time a part is uploaded """ file_size = path.getsize(file_path) if not part_size_kb: part_size_kb = get_appropiate_part_size(file_size) if part_size_kb > 512: raise ValueError('The part size must be less or equal to 512KB') part_size = int(part_size_kb * 1024) if part_size % 1024 != 0: raise ValueError('The part size must be evenly divisible by 1024') # Determine whether the file is too big (over 10MB) or not # Telegram does make a distinction between smaller or larger files is_large = file_size > 10 * 1024 * 1024 part_count = (file_size + part_size - 1) // part_size # Multiply the datetime timestamp by 10^6 to get the ticks # This is high likely going to be unique file_id = int(datetime.now().timestamp() * (10**6)) hash_md5 = md5() with open(file_path, 'rb') as file: for part_index in range(part_count): # Read the file by in chunks of size part_size part = file.read(part_size) # The SavePartRequest is different depending on whether # the file is too large or not (over or less than 10MB) if is_large: request = SaveBigFilePartRequest(file_id, part_index, part_count, part) else: request = SaveFilePartRequest(file_id, part_index, part) # Invoke the file upload and increment both the part index and MD5 checksum result = self.invoke(request) if result: hash_md5.update(part) if progress_callback: progress_callback(file.tell(), file_size) else: raise ValueError('Could not upload file part #{}'.format( part_index)) # Set a default file name if None was specified if not file_name: file_name = path.basename(file_path) # After the file has been uploaded, we can return a handle pointing to it return InputFile( id=file_id, parts=part_count, name=file_name, md5_checksum=hash_md5.hexdigest()) def send_photo_file(self, input_file, entity, caption=''): """Sends a previously uploaded input_file (which should be a photo) to the given entity (or input peer)""" self.send_media_file( InputMediaUploadedPhoto(input_file, caption), entity) def send_document_file(self, input_file, entity, caption=''): """Sends a previously uploaded input_file (which should be a document) to the given entity (or input peer)""" # Determine mime-type and attributes # Take the first element by using [0] since it returns a tuple mime_type = guess_type(input_file.name)[0] attributes = [ DocumentAttributeFilename(input_file.name) # TODO If the input file is an audio, find out: # Performer and song title and add DocumentAttributeAudio ] # Ensure we have a mime type, any; but it cannot be None # «The "octet-stream" subtype is used to indicate that a body contains arbitrary binary data.» if not mime_type: mime_type = 'application/octet-stream' self.send_media_file( InputMediaUploadedDocument( file=input_file, mime_type=mime_type, attributes=attributes, caption=caption), entity) def send_media_file(self, input_media, entity): """Sends any input_media (contact, document, photo...) to the given entiy""" self.invoke( SendMediaRequest( peer=get_input_peer(entity), media=input_media, random_id=utils.generate_random_long())) # endregion # region Downloading media requests def download_profile_photo(self, profile_photo, file_path, add_extension=True, download_big=True): """Downloads the profile photo for an user or a chat (including channels). Returns False if no photo was providen, or if it was Empty""" if (not profile_photo or isinstance(profile_photo, UserProfilePhotoEmpty) or isinstance(profile_photo, ChatPhotoEmpty)): return False if add_extension: file_path += get_extension(profile_photo) if download_big: photo_location = profile_photo.photo_big else: photo_location = profile_photo.photo_small # Download the media with the largest size input file location self.download_file_loc( InputFileLocation( volume_id=photo_location.volume_id, local_id=photo_location.local_id, secret=photo_location.secret), file_path) return True def download_msg_media(self, message_media, file_path, add_extension=True, progress_callback=None): """Downloads the given MessageMedia (Photo, Document or Contact) into the desired file_path, optionally finding its extension automatically The progress_callback should be a callback function which takes two parameters, uploaded size (in bytes) and total file size (in bytes). This will be called every time a part is downloaded""" if type(message_media) == MessageMediaPhoto: return self.download_photo(message_media, file_path, add_extension, progress_callback) elif type(message_media) == MessageMediaDocument: return self.download_document(message_media, file_path, add_extension, progress_callback) elif type(message_media) == MessageMediaContact: return self.download_contact(message_media, file_path, add_extension) def download_photo(self, message_media_photo, file_path, add_extension=False, progress_callback=None): """Downloads MessageMediaPhoto's largest size into the desired file_path, optionally finding its extension automatically The progress_callback should be a callback function which takes two parameters, uploaded size (in bytes) and total file size (in bytes). This will be called every time a part is downloaded""" # Determine the photo and its largest size photo = message_media_photo.photo largest_size = photo.sizes[-1] file_size = largest_size.size largest_size = largest_size.location if add_extension: file_path += get_extension(message_media_photo) # Download the media with the largest size input file location self.download_file_loc( InputFileLocation( volume_id=largest_size.volume_id, local_id=largest_size.local_id, secret=largest_size.secret), file_path, file_size=file_size, progress_callback=progress_callback) return file_path def download_document(self, message_media_document, file_path=None, add_extension=True, progress_callback=None): """Downloads the given MessageMediaDocument into the desired file_path, optionally finding its extension automatically. If no file_path is given, it will try to be guessed from the document The progress_callback should be a callback function which takes two parameters, uploaded size (in bytes) and total file size (in bytes). This will be called every time a part is downloaded""" document = message_media_document.document file_size = document.size # If no file path was given, try to guess it from the attributes if file_path is None: for attr in document.attributes: if type(attr) == DocumentAttributeFilename: file_path = attr.file_name break # This attribute has higher preference elif type(attr) == DocumentAttributeAudio: file_path = '{} - {}'.format(attr.performer, attr.title) if file_path is None: print('Could not determine a filename for the document') if add_extension: file_path += get_extension(message_media_document) self.download_file_loc( InputDocumentFileLocation( id=document.id, access_hash=document.access_hash, version=document.version), file_path, file_size=file_size, progress_callback=progress_callback) return file_path @staticmethod def download_contact(message_media_contact, file_path, add_extension=True): """Downloads a media contact using the vCard 4.0 format""" first_name = message_media_contact.first_name last_name = message_media_contact.last_name phone_number = message_media_contact.phone_number # The only way we can save a contact in an understandable # way by phones is by using the .vCard format if add_extension: file_path += '.vcard' # Ensure that we'll be able to download the contact utils.ensure_parent_dir_exists(file_path) with open(file_path, 'w', encoding='utf-8') as file: file.write('BEGIN:VCARD\n') file.write('VERSION:4.0\n') file.write('N:{};{};;;\n'.format(first_name, last_name if last_name else '')) file.write('FN:{}\n'.format(' '.join((first_name, last_name)))) file.write('TEL;TYPE=cell;VALUE=uri:tel:+{}\n'.format( phone_number)) file.write('END:VCARD\n') return file_path def download_file_loc(self, input_location, file_path, part_size_kb=64, file_size=None, progress_callback=None): """Downloads media from the given input_file_location to the specified file_path. If a progress_callback function is given, it will be called taking two arguments (downloaded bytes count and total file size)""" if not part_size_kb: if not file_size: raise ValueError('A part size value must be provided') else: part_size_kb = get_appropiate_part_size(file_size) part_size = int(part_size_kb * 1024) if part_size % 1024 != 0: raise ValueError('The part size must be evenly divisible by 1024') # Ensure that we'll be able to download the media utils.ensure_parent_dir_exists(file_path) # Start with an offset index of 0 offset_index = 0 with open(file_path, 'wb') as file: while True: # The current offset equals the offset_index multiplied by the part size offset = offset_index * part_size result = self.invoke( GetFileRequest(input_location, offset, part_size)) offset_index += 1 # If we have received no data (0 bytes), the file is over # So there is nothing left to download and write if not result.bytes: return result.type # Return some extra information file.write(result.bytes) if progress_callback: progress_callback(file.tell(), file_size) # endregion # endregion # region Updates handling def add_update_handler(self, handler): """Adds an update handler (a function which takes a TLObject, an update, as its parameter) and listens for updates""" if not self.signed_in: raise ValueError( "You cannot add update handlers until you've signed in.") self.sender.add_update_handler(handler) def remove_update_handler(self, handler): self.sender.remove_update_handler(handler) # endregion