teledrive-client
Version:
NodeJS/Browser MTProto API Telegram client library,
71 lines • 2.68 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.MTProtoPlainSender = void 0;
/**
* This module contains the class used to communicate with Telegram's servers
* in plain text, when no authorization key has been created yet.
*/
const MTProtoState_1 = require("./MTProtoState");
const Helpers_1 = require("../Helpers");
const errors_1 = require("../errors");
const extensions_1 = require("../extensions");
/**
* MTProto Mobile Protocol plain sender (https://core.telegram.org/mtproto/description#unencrypted-messages)
*/
class MTProtoPlainSender {
/**
* Initializes the MTProto plain sender.
* @param connection connection: the Connection to be used.
* @param loggers
*/
constructor(connection, loggers) {
this._state = new MTProtoState_1.MTProtoState(undefined, loggers);
this._connection = connection;
}
/**
* Sends and receives the result for the given request.
* @param request
*/
async send(request) {
let body = request.getBytes();
let msgId = this._state._getNewMsgId();
const m = (0, Helpers_1.toSignedLittleBuffer)(msgId, 8);
const b = Buffer.alloc(4);
b.writeInt32LE(body.length, 0);
const res = Buffer.concat([
Buffer.concat([Buffer.alloc(8), m, b]),
body,
]);
await this._connection.send(res);
body = await this._connection.recv();
if (body.length < 8) {
throw new errors_1.InvalidBufferError(body);
}
const reader = new extensions_1.BinaryReader(body);
const authKeyId = reader.readLong();
if (authKeyId.neq(BigInt(0))) {
throw new Error("Bad authKeyId");
}
msgId = reader.readLong();
if (msgId.eq(BigInt(0))) {
throw new Error("Bad msgId");
}
/** ^ We should make sure that the read ``msg_id`` is greater
* than our own ``msg_id``. However, under some circumstances
* (bad system clock/working behind proxies) this seems to not
* be the case, which would cause endless assertion errors.
*/
const length = reader.readInt();
if (length <= 0) {
throw new Error("Bad length");
}
/**
* We could read length bytes and use those in a new reader to read
* the next TLObject without including the padding, but since the
* reader isn't used for anything else after this, it's unnecessary.
*/
return reader.tgReadObject();
}
}
exports.MTProtoPlainSender = MTProtoPlainSender;
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