fix(adapter): fix progress event emitting; (#6518)

lib/helpers/AxiosTransformStream.js

@@ -2,8 +2,6 @@
 
 import stream from 'stream';
 import utils from '../utils.js';
-import throttle from './throttle.js';
-import speedometer from './speedometer.js';
 
 const kInternals = Symbol('internals');
 
@@ -24,12 +22,8 @@ class AxiosTransformStream extends stream.Transform{
       readableHighWaterMark: options.chunkSize
     });
 
-    const self = this;
-
     const internals = this[kInternals] = {
-      length: options.length,
       timeWindow: options.timeWindow,
-      ticksRate: options.ticksRate,
       chunkSize: options.chunkSize,
       maxRate: options.maxRate,
       minChunkSize: options.minChunkSize,
@@ -41,8 +35,6 @@ class AxiosTransformStream extends stream.Transform{
       onReadCallback: null
     };
 
-    const _speedometer = speedometer(internals.ticksRate * options.samplesCount, internals.timeWindow);
-
     this.on('newListener', event => {
       if (event === 'progress') {
         if (!internals.isCaptured) {
@@ -50,39 +42,6 @@ class AxiosTransformStream extends stream.Transform{
         }
       }
     });
-
-    let bytesNotified = 0;
-
-    internals.updateProgress = throttle(function throttledHandler() {
-      const totalBytes = internals.length;
-      const bytesTransferred = internals.bytesSeen;
-      const progressBytes = bytesTransferred - bytesNotified;
-      if (!progressBytes || self.destroyed) return;
-
-      const rate = _speedometer(progressBytes);
-
-      bytesNotified = bytesTransferred;
-
-      process.nextTick(() => {
-        self.emit('progress', {
-          loaded: bytesTransferred,
-          total: totalBytes,
-          progress: totalBytes ? (bytesTransferred / totalBytes) : undefined,
-          bytes: progressBytes,
-          rate: rate ? rate : undefined,
-          estimated: rate && totalBytes && bytesTransferred <= totalBytes ?
-            (totalBytes - bytesTransferred) / rate : undefined,
-          lengthComputable: totalBytes != null
-        });
-      });
-    }, internals.ticksRate);
-
-    const onFinish = () => {
-      internals.updateProgress.call(true);
-    };
-
-    this.once('end', onFinish);
-    this.once('error', onFinish);
   }
 
   _read(size) {
@@ -96,7 +55,6 @@ class AxiosTransformStream extends stream.Transform{
   }
 
   _transform(chunk, encoding, callback) {
-    const self = this;
     const internals = this[kInternals];
     const maxRate = internals.maxRate;
 
@@ -108,16 +66,14 @@ class AxiosTransformStream extends stream.Transform{
     const bytesThreshold = (maxRate / divider);
     const minChunkSize = internals.minChunkSize !== false ? Math.max(internals.minChunkSize, bytesThreshold * 0.01) : 0;
 
-    function pushChunk(_chunk, _callback) {
+    const pushChunk = (_chunk, _callback) => {
       const bytes = Buffer.byteLength(_chunk);
       internals.bytesSeen += bytes;
       internals.bytes += bytes;
 
-      if (internals.isCaptured) {
-        internals.updateProgress();
-      }
+      internals.isCaptured && this.emit('progress', internals.bytesSeen);
 
-      if (self.push(_chunk)) {
+      if (this.push(_chunk)) {
         process.nextTick(_callback);
       } else {
         internals.onReadCallback = () => {
@@ -182,11 +138,6 @@ class AxiosTransformStream extends stream.Transform{
       }
     });
   }
-
-  setLength(length) {
-    this[kInternals].length = +length;
-    return this;
-  }
 }
 
 export default AxiosTransformStream;