Add compatibility for Cloudflare Workers

README.md

@@ -93,6 +93,16 @@ You can also use the helpful script `generate_webpack.js`
 node generate_webpack.js
 ```
 
+## Running Inside Cloudflare Workers
+
+To use GramJS inside Cloudflare Workers, you need to install the browser-compatible version:
+
+```bash
+$ npm i telegram@browser
+```
+
+Cloudflare Workers' runtime uses the V8 engine—the same engine used by Chromium and Node.js—but it doesn't support many Node.js-specific APIs like fs (file system). That's why you need to install the browser-compatible version.
+
 ## Calling the raw API
 
 To use raw telegram API methods use [invoke function](https://gram.js.org/beta/classes/TelegramClient.html#invoke).

gramjs/client/TelegramClient.ts

@@ -30,7 +30,7 @@ import { EditedMessage, EditedMessageEvent } from "../events/EditedMessage";
 import { DeletedMessage, DeletedMessageEvent } from "../events/DeletedMessage";
 import { LogLevel } from "../extensions/Logger";
 import { inspect } from "../inspect";
-import { isNode } from "../platform";
+import { isCloudflareWorker, isNode } from "../platform";
 
 /**
  * The TelegramClient uses several methods in different files to provide all the common functionality in a nice interface.</br>
@@ -1489,7 +1489,7 @@ export class TelegramClient extends TelegramBaseClient {
         web = false
     ): Promise<{ id: number; ipAddress: string; port: number }> {
         this._log.debug(`Getting DC ${dcId}`);
-        if (!isNode || web) {
+        if (!isNode || web || isCloudflareWorker) {
             switch (dcId) {
                 case 1:
                     return {

gramjs/client/telegramBaseClient.ts

@@ -22,15 +22,15 @@ import {
 } from "../network/connection/TCPMTProxy";
 import { Semaphore } from "async-mutex";
 import { LogLevel } from "../extensions/Logger";
-import { isBrowser, isNode } from "../platform";
+import { isBrowser, isCloudflareWorker, isNode } from "../platform";
 import Deferred from "../extensions/Deferred";
 import Timeout = NodeJS.Timeout;
 
 const EXPORTED_SENDER_RECONNECT_TIMEOUT = 1000; // 1 sec
 const EXPORTED_SENDER_RELEASE_TIMEOUT = 30000; // 30 sec
 
 const DEFAULT_DC_ID = 4;
-const DEFAULT_IPV4_IP = isNode ? "149.154.167.91" : "vesta.web.telegram.org";
+const DEFAULT_IPV4_IP = isNode && !isCloudflareWorker ? "149.154.167.91" : "vesta.web.telegram.org";
 const DEFAULT_IPV6_IP = "2001:067c:04e8:f004:0000:0000:0000:000a";
 
 /**
@@ -152,7 +152,7 @@ const clientParamsDefault = {
     langCode: "en",
     systemLangCode: "en",
     _securityChecks: true,
-    useWSS: isBrowser ? window.location.protocol == "https:" : false,
+    useWSS: isBrowser ? window.location.protocol == "https:" : isCloudflareWorker ? true : false,
     testServers: false,
 };
 

gramjs/platform.ts

@@ -1,3 +1,4 @@
 export const isDeno = "Deno" in globalThis;
+export const isCloudflareWorker = typeof navigator !== "undefined" ? navigator.userAgent == "Cloudflare-Workers" : false //https://developers.cloudflare.com/workers/runtime-apis/web-standards/#navigatoruseragent
 export const isBrowser = !isDeno && typeof window !== "undefined";
-export const isNode = !isBrowser;
+export const isNode = !isBrowser;