fix: memory blow on large files sending through URL

src/Utils/messages-media.ts

@@ -345,24 +345,35 @@ export const encryptedStream = async(
 
 	const mediaKey = Crypto.randomBytes(32)
 	const { cipherKey, iv, macKey } = await getMediaKeys(mediaKey, mediaType)
-	const encWriteStream = new Readable({ read: () => {} })
+ 
+  const encFilePath = join(
+    getTmpFilesDirectory(),
+    mediaType + generateMessageIDV2() + "-enc"
+  );
+  const encFileWriteStream = createWriteStream(encFilePath);
 
-	let bodyPath: string | undefined
-	let writeStream: WriteStream | undefined
-	let didSaveToTmpPath = false
-	if(type === 'file') {
-		bodyPath = (media as WAMediaPayloadURL).url.toString()
-	} else if(saveOriginalFileIfRequired) {
-		bodyPath = join(getTmpFilesDirectory(), mediaType + generateMessageIDV2())
-		writeStream = createWriteStream(bodyPath)
-		didSaveToTmpPath = true
-	}
+  let originalFileStream: WriteStream | undefined;
+  let originalFilePath: string | undefined;
+
+  if (saveOriginalFileIfRequired) {
+    originalFilePath = join(
+      getTmpFilesDirectory(),
+      mediaType + generateMessageIDV2() + "-original"
+    );
+    originalFileStream = createWriteStream(originalFilePath);
+  }
 
 	let fileLength = 0
 	const aes = Crypto.createCipheriv('aes-256-cbc', cipherKey, iv)
-	let hmac = Crypto.createHmac('sha256', macKey!).update(iv)
-	let sha256Plain = Crypto.createHash('sha256')
-	let sha256Enc = Crypto.createHash('sha256')
+	const hmac = Crypto.createHmac('sha256', macKey!).update(iv)
+	const sha256Plain = Crypto.createHash('sha256')
+  const sha256Enc = Crypto.createHash('sha256')
+  
+  const onChunk = (buff: Buffer) => {
+    sha256Enc.update(buff);
+    hmac.update(buff);
+    encFileWriteStream.write(buff);
+  };
 
 	try {
 		for await (const data of stream) {
@@ -379,68 +390,62 @@ export const encryptedStream = async(
 						data: { media, type }
 					}
 				)
-			}
-
-			sha256Plain = sha256Plain.update(data)
-			if(writeStream && !writeStream.write(data)) {
-				await once(writeStream, 'drain')
-			}
+      }
+      
+      if (originalFileStream) {
+        if (!originalFileStream.write(data)) {
+          await once(originalFileStream, "drain");
+        }
+      }
 
+			sha256Plain.update(data)
 			onChunk(aes.update(data))
 		}
 
 		onChunk(aes.final())
 
 		const mac = hmac.digest().slice(0, 10)
-		sha256Enc = sha256Enc.update(mac)
+		sha256Enc.update(mac)
 
 		const fileSha256 = sha256Plain.digest()
 		const fileEncSha256 = sha256Enc.digest()
 
-		encWriteStream.push(mac)
-		encWriteStream.push(null)
+    encFileWriteStream.write(mac);
 
-		writeStream?.end()
-		stream.destroy()
+    encFileWriteStream.end();
+    originalFileStream?.end?.();
+    stream.destroy();
 
 		logger?.debug('encrypted data successfully')
 
 		return {
 			mediaKey,
-			encWriteStream,
-			bodyPath,
+      originalFilePath,
+      encFilePath,
 			mac,
 			fileEncSha256,
 			fileSha256,
-			fileLength,
-			didSaveToTmpPath
+			fileLength			
 		}
 	} catch(error) {
 		// destroy all streams with error
-		encWriteStream.destroy()
-		writeStream?.destroy()
+		encFileWriteStream.destroy()
+		originalFileStream?.destroy?.()
 		aes.destroy()
 		hmac.destroy()
 		sha256Plain.destroy()
 		sha256Enc.destroy()
 		stream.destroy()
 
-		if(didSaveToTmpPath) {
-			try {
-				await fs.unlink(bodyPath!)
-			} catch(err) {
-				logger?.error({ err }, 'failed to save to tmp path')
-			}
-		}
-
+		
+    try {
+      await fs.unlink(encFilePath)
+      if (originalFilePath) await fs.unlink(originalFilePath)
+    } catch(err) {
+      logger?.error({ err }, 'failed deleting tmp files')
+    }
 		throw error
 	}
-
-	function onChunk(buff: Buffer) {
-		sha256Enc = sha256Enc.update(buff)
-		hmac = hmac.update(buff)
-		encWriteStream.push(buff)
-	}
 }
 
 const DEF_HOST = 'mmg.whatsapp.net'
@@ -620,7 +625,8 @@ export const getWAUploadToServer = (
 					url,
 					stream,
 					{
-						...options,
+            ...options,
+            maxRedirects: 0,
 						headers: {
 							...options.headers || { },
 							'Content-Type': 'application/octet-stream',

src/Utils/messages.ts

@@ -1,7 +1,7 @@
 import { Boom } from '@hapi/boom'
 import axios from 'axios'
 import { randomBytes } from 'crypto'
-import { promises as fs } from 'fs'
+import { createReadStream, promises as fs } from 'fs'
 import { type Transform } from 'stream'
 import { proto } from '../../WAProto'
 import { MEDIA_KEYS, URL_REGEX, WA_DEFAULT_EPHEMERAL } from '../Defaults'
@@ -155,15 +155,14 @@ export const prepareWAMessageMedia = async(
 										(typeof uploadData['jpegThumbnail'] === 'undefined')
 	const requiresWaveformProcessing = mediaType === 'audio' && uploadData.ptt === true
 	const requiresAudioBackground = options.backgroundColor && mediaType === 'audio' && uploadData.ptt === true
-	const requiresOriginalForSomeProcessing = requiresDurationComputation || requiresThumbnailComputation
+  const requiresOriginalForSomeProcessing = requiresDurationComputation || requiresThumbnailComputation
 	const {
 		mediaKey,
-		encWriteStream,
-		bodyPath,
+		encFilePath,
+		originalFilePath,
 		fileEncSha256,
 		fileSha256,
-		fileLength,
-		didSaveToTmpPath
+		fileLength	
 	} = await encryptedStream(
 		uploadData.media,
 		options.mediaTypeOverride || mediaType,
@@ -178,7 +177,7 @@ export const prepareWAMessageMedia = async(
 	const [{ mediaUrl, directPath }] = await Promise.all([
 		(async() => {
 			const result = await options.upload(
-				encWriteStream,
+				createReadStream(encFilePath),
 				{ fileEncSha256B64, mediaType, timeoutMs: options.mediaUploadTimeoutMs }
 			)
 			logger?.debug({ mediaType, cacheableKey }, 'uploaded media')
@@ -190,7 +189,7 @@ export const prepareWAMessageMedia = async(
 					const {
 						thumbnail,
 						originalImageDimensions
-					} = await generateThumbnail(bodyPath!, mediaType as 'image' | 'video', options)
+					} = await generateThumbnail(originalFilePath!, mediaType as 'image' | 'video', options)
 					uploadData.jpegThumbnail = thumbnail
 					if(!uploadData.width && originalImageDimensions) {
 						uploadData.width = originalImageDimensions.width
@@ -202,12 +201,12 @@ export const prepareWAMessageMedia = async(
 				}
 
 				if(requiresDurationComputation) {
-					uploadData.seconds = await getAudioDuration(bodyPath!)
+					uploadData.seconds = await getAudioDuration(originalFilePath!)
 					logger?.debug('computed audio duration')
 				}
 
 				if(requiresWaveformProcessing) {
-					uploadData.waveform = await getAudioWaveform(bodyPath!, logger)
+					uploadData.waveform = await getAudioWaveform(originalFilePath!, logger)
 					logger?.debug('processed waveform')
 				}
 
@@ -222,17 +221,13 @@ export const prepareWAMessageMedia = async(
 	])
 		.finally(
 			async() => {
-				encWriteStream.destroy()
-				// remove tmp files
-				if(didSaveToTmpPath && bodyPath) {
-					try {
-						await fs.access(bodyPath)
-						await fs.unlink(bodyPath)
-						logger?.debug('removed tmp file')
-					} catch(error) {
-						logger?.warn('failed to remove tmp file')
-					}
-				}
+        try {
+          await fs.unlink(encFilePath)
+          if (originalFilePath) await fs.unlink(originalFilePath)
+          logger?.debug('removed tmp files')
+        } catch(error) {
+          logger?.warn('failed to remove tmp file')
+        }
 			}
 		)