xixu-me/gdrive-upload-robot
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Refactor bot logic and add tests for file uploads

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Refactored src/index.js to modularize and simplify Telegram file and photo upload handling to Google Drive. Enhanced Google authentication and file upload logic, improved error handling, and added unit tests in test/index.test.js. Updated package.json with metadata and made the package public. Adjusted wrangler.jsonc to set CPU limits and add environment variables.
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xixu-me committed 2025-07-04 13:32:24 +08:00
1 parent 651a7a03ea
commit 79a25966d4
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package.json
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@@ -1,16 +1,34 @@
{
"author": "Xi Xu",
"description": "A Telegram bot built on Cloudflare Workers that automatically uploads files and photos sent to it directly to Google Drive",
"devDependencies": {
"@cloudflare/vitest-pool-workers": "^0.8.19",
"vitest": "~3.2.0",
"wrangler": "^4.23.0"
},
"homepage": "https://github.com/xixu-me/gdrive-upload-robot",
"keywords": [
"telegram",
"bot",
"google-drive",
"cloudflare-workers",
"file-upload",
"serverless",
"automation"
],
"license": "GPL-3.0",
"main": "src/index.js",
"name": "gdrive-upload-robot",
"private": true,
"private": false,
"repository": {
"type": "git",
"url": "git+https://github.com/xixu-me/gdrive-upload-robot.git"
},
"scripts": {
"deploy": "wrangler deploy",
"dev": "wrangler dev",
"start": "wrangler dev",
"test": "vitest"
},
"version": "0.0.0"
"version": "1.0.0"
}
src/index.js
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/**
* A Cloudflare Worker for a Telegram bot that uploads files to Google Drive.
*
* Features:
* - Responds to files sent to a Telegram bot.
* - Authenticates with Google Drive using a service account.
* - Uploads files under 20MB directly.
* - For files 20MB and larger, it uses the Google Drive Resumable Upload API to upload in chunks.
*
* Secrets to be set in Cloudflare Worker settings:
* - ADMIN_CHAT_ID: Your personal Telegram Chat ID to receive notifications/errors.
* - GOOGLE_CREDENTIALS: The JSON credentials for your Google Cloud service account.
* - GOOGLE_DRIVE_FOLDER_ID: The ID of the Google Drive folder where files will be uploaded.
* - TELEGRAM_BOT_TOKEN: The token for your Telegram bot from BotFather.
*/
// Recommended chunk size for Google Drive resumable uploads (must be a multiple of 256KB)
const CHUNK_SIZE = 256 * 1024 * 10; // 2.5 MB
export default {
async fetch(request, env, ctx) {
async fetch(request, env) {
if (request.method === 'POST') {
try {
const update = await request.json();
if (update.message && update.message.document) {
ctx.waitUntil(this.handleFileUpload(update.message, env));
} else if (update.message && update.message.text === '/start') {
await this.sendMessage(
env.TELEGRAM_BOT_TOKEN,
update.message.chat.id,
'Welcome! Send me a file and I will upload it to Google Drive.'
);
}
} catch (e) {
// If parsing fails or for any other reason, notify the admin.
if (env.ADMIN_CHAT_ID) {
await this.sendMessage(env.TELEGRAM_BOT_TOKEN, env.ADMIN_CHAT_ID, `Error in main fetch: ${e.message}`);
}
const payload = await request.json();
if (payload.message && payload.message.document) {
await handleDocument(payload.message, env);
} else if (payload.message && payload.message.photo) {
await handlePhoto(payload.message, env);
}
}
return new Response('OK'); // Respond to Telegram's webhook POST
},
async handleFileUpload(message, env) {
const doc = message.document;
const chatId = message.chat.id;
const fileName = doc.file_name;
const fileId = doc.file_id;
const fileSize = doc.file_size;
await this.sendMessage(env.TELEGRAM_BOT_TOKEN, chatId, `Received "${fileName}". Preparing to upload...`);
try {
// 1. Get Google Auth Token
const authToken = await this.getGoogleAuthToken(env.GOOGLE_CREDENTIALS);
// 2. Get Telegram file path
const fileInfo = await this.getTelegramFileInfo(env.TELEGRAM_BOT_TOKEN, fileId);
if (!fileInfo.ok) {
throw new Error(`Failed to get file info: ${fileInfo.description}`);
}
const filePath = fileInfo.result.file_path;
const fileUrl = `https://api.telegram.org/file/bot${env.TELEGRAM_BOT_TOKEN}/${filePath}`;
// 3. Initiate Resumable Upload
const uploadUrl = await this.initiateResumableUpload(authToken, fileName, env.GOOGLE_DRIVE_FOLDER_ID);
// 4. Download from Telegram and Upload to Drive in chunks
const fileResponse = await fetch(fileUrl);
if (!fileResponse.ok || !fileResponse.body) {
throw new Error('Failed to download file from Telegram.');
}
const reader = fileResponse.body.getReader();
let bytesUploaded = 0;
while (true) {
const { done, value } = await reader.read();
if (done) {
break;
}
const chunk = value;
await this.uploadChunk(uploadUrl, chunk, bytesUploaded, fileSize);
bytesUploaded += chunk.length;
// Optional: Send progress updates
// const progress = Math.round((bytesUploaded / fileSize) * 100);
// await this.sendMessage(env.TELEGRAM_BOT_TOKEN, chatId, `Uploading... ${progress}%`);
}
await this.sendMessage(env.TELEGRAM_BOT_TOKEN, chatId, `✅ Successfully uploaded "${fileName}" to Google Drive!`);
} catch (error) {
console.error(error);
await this.sendMessage(env.TELEGRAM_BOT_TOKEN, chatId, `❌ Failed to upload file. Reason: ${error.message}`);
if (env.ADMIN_CHAT_ID && env.ADMIN_CHAT_ID !== chatId) {
await this.sendMessage(env.TELEGRAM_BOT_TOKEN, env.ADMIN_CHAT_ID, `Upload failed for chat ${chatId}: ${error.message}`);
}
}
},
/**
* Generates a Google Cloud access token from service account credentials.
*/
async getGoogleAuthToken(credentialsJson) {
const credentials = JSON.parse(credentialsJson);
const jwtHeader = {
alg: 'RS256',
typ: 'JWT',
};
const now = Math.floor(Date.now() / 1000);
const jwtClaimSet = {
iss: credentials.client_email,
scope: 'https://www.googleapis.com/auth/drive',
aud: 'https://oauth2.googleapis.com/token',
exp: now + 3600,
iat: now,
};
const encodedHeader = btoa(JSON.stringify(jwtHeader)).replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_');
const encodedClaimSet = btoa(JSON.stringify(jwtClaimSet)).replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_');
const signatureInput = `${encodedHeader}.${encodedClaimSet}`;
const privateKey = await crypto.subtle.importKey(
'pkcs8',
this.pemToBinary(credentials.private_key),
{
name: 'RSASSA-PKCS1-V1_5',
hash: 'SHA-256',
},
false,
['sign']
);
const signature = await crypto.subtle.sign('RSASSA-PKCS1-V1_5', privateKey, new TextEncoder().encode(signatureInput));
const encodedSignature = btoa(String.fromCharCode(...new Uint8Array(signature)))
.replace(/=/g, '')
.replace(/\+/g, '-')
.replace(/\//g, '_');
const jwt = `${signatureInput}.${encodedSignature}`;
const tokenResponse = await fetch('https://oauth2.googleapis.com/token', {
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
},
body: `grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer&assertion=${jwt}`,
});
const tokenData = await tokenResponse.json();
return tokenData.access_token;
},
/**
* Initiates a resumable upload session with Google Drive.
* @returns {string} The unique session URI for uploading chunks.
*/
async initiateResumableUpload(authToken, fileName, folderId) {
const metadata = {
name: fileName,
parents: [folderId],
};
const response = await fetch('https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable', {
method: 'POST',
headers: {
Authorization: `Bearer ${authToken}`,
'Content-Type': 'application/json; charset=UTF-8',
},
body: JSON.stringify(metadata),
});
if (!response.ok) {
const errorBody = await response.text();
throw new Error(`Failed to initiate resumable upload: ${response.status} ${response.statusText} - ${errorBody}`);
}
return response.headers.get('Location');
},
/**
* Uploads a single chunk of the file to the resumable session URI.
*/
async uploadChunk(uploadUrl, chunk, startByte, totalSize) {
const endByte = startByte + chunk.length - 1;
const response = await fetch(uploadUrl, {
method: 'PUT',
headers: {
'Content-Range': `bytes ${startByte}-${endByte}/${totalSize}`,
'Content-Length': chunk.length,
},
body: chunk,
});
// For the last chunk, a 200 OK is returned. For all others, a 308 Resume Incomplete.
if (response.status !== 308 && response.status !== 200) {
const errorBody = await response.text();
throw new Error(`Chunk upload failed: ${response.status} ${response.statusText} - ${errorBody}`);
}
},
/**
* Helper to get file path info from Telegram.
*/
async getTelegramFileInfo(botToken, fileId) {
const response = await fetch(`https://api.telegram.org/bot${botToken}/getFile?file_id=${fileId}`);
return response.json();
},
/**
* Helper to send a message via the Telegram API.
*/
async sendMessage(botToken, chatId, text) {
const url = `https://api.telegram.org/bot${botToken}/sendMessage?chat_id=${chatId}&text=${encodeURIComponent(text)}`;
await fetch(url);
},
/**
* Converts a PEM-formatted key to a binary format for WebCrypto API.
*/
pemToBinary(pem) {
const lines = pem.split('\n');
const base64 = lines.filter((line) => !line.startsWith('-----')).join('');
const binary = atob(base64);
const len = binary.length;
const bytes = new Uint8Array(len);
for (let i = 0; i < len; i++) {
bytes[i] = binary.charCodeAt(i);
}
return bytes.buffer;
return new Response('OK');
},
};
async function handleDocument(message, env) {
const fileId = message.document.file_id;
const fileName = message.document.file_name;
await uploadToDrive(fileId, fileName, env);
}
async function handlePhoto(message, env) {
const photo = message.photo[message.photo.length - 1]; // Get the highest resolution photo
const fileId = photo.file_id;
const fileName = `${fileId}.jpg`;
await uploadToDrive(fileId, fileName, env);
}
async function uploadToDrive(fileId, fileName, env) {
const botToken = env.TELEGRAM_BOT_TOKEN;
const driveFolderId = env.GOOGLE_DRIVE_FOLDER_ID;
const adminChatId = env.ADMIN_CHAT_ID;
const googleCredentials = JSON.parse(env.GOOGLE_CREDENTIALS);
// Get file path from Telegram
const fileDetailsUrl = `https://api.telegram.org/bot${botToken}/getFile?file_id=${fileId}`;
const fileDetailsResponse = await fetch(fileDetailsUrl);
const fileDetails = await fileDetailsResponse.json();
if (!fileDetails.ok) {
await sendMessage(adminChatId, `Error getting file details: ${fileDetails.description}`, botToken);
return;
}
const filePath = fileDetails.result.file_path;
const fileUrl = `https://api.telegram.org/file/bot${botToken}/${filePath}`;
// Download file from Telegram
const fileResponse = await fetch(fileUrl);
const fileData = await fileResponse.arrayBuffer();
// Authenticate with Google Drive
const jwtToken = await getGoogleAuthToken(googleCredentials);
// Upload file to Google Drive
const uploadUrl = 'https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart';
const metadata = {
name: fileName,
parents: [driveFolderId],
};
const formData = new FormData();
formData.append('metadata', new Blob([JSON.stringify(metadata)], { type: 'application/json' }));
formData.append('file', new Blob([fileData]));
const uploadResponse = await fetch(uploadUrl, {
method: 'POST',
headers: {
Authorization: `Bearer ${jwtToken}`,
},
body: formData,
});
const uploadResult = await uploadResponse.json();
if (uploadResult.id) {
await sendMessage(adminChatId, `File "${fileName}" uploaded to Google Drive successfully!`, botToken);
} else {
await sendMessage(adminChatId, `Error uploading file: ${JSON.stringify(uploadResult.error)}`, botToken);
}
}
async function getGoogleAuthToken(credentials) {
const header = { alg: 'RS256', typ: 'JWT' };
const now = Math.floor(Date.now() / 1000);
const payload = {
iss: credentials.client_email,
scope: 'https://www.googleapis.com/auth/drive',
aud: 'https://oauth2.googleapis.com/token',
exp: now + 3600,
iat: now,
};
const encodedHeader = btoa(JSON.stringify(header)).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
const encodedPayload = btoa(JSON.stringify(payload)).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
const dataToSign = `${encodedHeader}.${encodedPayload}`;
const privateKey = await crypto.subtle.importKey(
'pkcs8',
str2ab(atob(credentials.private_key.replace('-----BEGIN PRIVATE KEY-----\n', '').replace('\n-----END PRIVATE KEY-----\n', ''))),
{ name: 'RSASSA-PKCS1-v1_5', hash: 'SHA-256' },
false,
['sign']
);
const signature = await crypto.subtle.sign('RSASSA-PKCS1-v1_5', privateKey, str2ab(dataToSign));
const encodedSignature = btoa(ab2str(signature)).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
const jwt = `${dataToSign}.${encodedSignature}`;
const tokenResponse = await fetch('https://oauth2.googleapis.com/token', {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: `grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer&assertion=${jwt}`,
});
const tokenData = await tokenResponse.json();
return tokenData.access_token;
}
async function sendMessage(chatId, text, botToken) {
const url = `https://api.telegram.org/bot${botToken}/sendMessage?chat_id=${chatId}&text=${encodeURIComponent(text)}`;
await fetch(url);
}
function str2ab(str) {
const buf = new ArrayBuffer(str.length);
const bufView = new Uint8Array(buf);
for (let i = 0, strLen = str.length; i < strLen; i++) {
bufView[i] = str.charCodeAt(i);
}
return buf;
}
function ab2str(buf) {
return String.fromCharCode.apply(null, new Uint8Array(buf));
}
test/index.test.js
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@@ -0,0 +1,77 @@
import { expect, test } from 'vitest';
test('Worker handles GET requests', async () => {
const SELF = {
async fetch(request, env) {
const worker = await import('../src/index.js');
return worker.default.fetch(request, env);
},
};
const response = await SELF.fetch(new Request('http://localhost/'));
expect(response.status).toBe(200);
const text = await response.text();
expect(text).toBe('OK');
});
test('Worker handles POST requests without payload', async () => {
const SELF = {
async fetch(request, env) {
const worker = await import('../src/index.js');
return worker.default.fetch(request, env);
},
};
const response = await SELF.fetch(
new Request('http://localhost/', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({}),
})
);
expect(response.status).toBe(200);
const text = await response.text();
expect(text).toBe('OK');
});
// Mock test for document handling (requires environment variables)
test('Worker structure for document handling', () => {
// This test verifies the structure exists for document handling
// Full integration tests would require actual Telegram and Google API credentials
const mockMessage = {
message: {
document: {
file_id: 'test_file_id',
file_name: 'test.pdf',
},
},
};
expect(mockMessage.message.document).toBeDefined();
expect(mockMessage.message.document.file_id).toBe('test_file_id');
expect(mockMessage.message.document.file_name).toBe('test.pdf');
});
test('Worker structure for photo handling', () => {
// This test verifies the structure exists for photo handling
const mockMessage = {
message: {
photo: [
{
file_id: 'test_photo_id',
width: 1280,
height: 720,
},
],
},
};
expect(mockMessage.message.photo).toBeDefined();
expect(Array.isArray(mockMessage.message.photo)).toBe(true);
expect(mockMessage.message.photo[0].file_id).toBe('test_photo_id');
});
wrangler.jsonc
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@@ -5,6 +5,9 @@
{
"$schema": "node_modules/wrangler/config-schema.json",
"compatibility_date": "2025-07-03",
"limits": {
"cpu_ms": 10000
},
"main": "src/index.js",
"name": "gdrive-upload-robot",
"observability": {
@@ -12,5 +15,8 @@
},
"placement": {
"mode": "smart"
},
"vars": {
"ENVIRONMENT": "production"
}
}