Emit response event from file#createReadStream()

lib/storage/file.js

@@ -464,6 +464,8 @@ File.prototype.createReadStream = function(options) {
         request(authorizedReqOpts)
           .on('error', done)
 
+          .on('response', throughStream.emit.bind(throughStream, 'response'))
+
           .on('data', function(chunk) {
             if (crc32c) {
               localCrcHash = crc.calculate(chunk, localCrcHash);
@@ -1025,7 +1027,7 @@ File.prototype.getSignedPolicy = function(options, callback) {
  * @param {string=} options.responseDisposition - The
  *     response-content-disposition parameter (http://goo.gl/yMWxQV) of the
  *     signed url.
- * @param {string=} options.responseType - The response-content-type parameter 
+ * @param {string=} options.responseType - The response-content-type parameter
  *     of the signed url.
  * @param {function=} callback - The callback function.
  *
@@ -1071,20 +1073,20 @@ File.prototype.getSignedUrl = function(options, callback) {
 
     var responseContentType = '';
     if (util.is(options.responseType, 'string')) {
-      responseContentType = 
-        '&response-content-type=' + 
+      responseContentType =
+        '&response-content-type=' +
         encodeURIComponent(options.responseType);
     }
 
     var responseContentDisposition = '';
     if (util.is(options.promptSaveAs, 'string')) {
       responseContentDisposition =
-        '&response-content-disposition=attachment; filename="' + 
+        '&response-content-disposition=attachment; filename="' +
         encodeURIComponent(options.promptSaveAs) + '"';
     }
     if (util.is(options.responseDisposition, 'string')) {
-      responseContentDisposition = 
-        '&response-content-disposition=' + 
+      responseContentDisposition =
+        '&response-content-disposition=' +
         encodeURIComponent(options.responseDisposition);
     }
 

test/storage/file.js

@@ -370,6 +370,30 @@ describe('File', function() {
   });
 
   describe('createReadStream', function() {
+
+    function getFakeRequest(data, fakeResponse) {
+      function FakeRequest(req) {
+        if (!(this instanceof FakeRequest)) {
+          return new FakeRequest(req);
+        }
+
+        var that = this;
+
+        stream.Readable.call(this);
+        this._read = function() {
+          this.push(data);
+          this.push(null);
+        };
+
+        setImmediate(function() {
+          that.emit('response', fakeResponse);
+          that.emit('complete', fakeResponse);
+        });
+      }
+      nodeutil.inherits(FakeRequest, stream.Readable);
+      return FakeRequest;
+    }
+
     it('should create an authorized request', function(done) {
       var expectedPath = util.format('https://{b}.storage.googleapis.com/{o}', {
         b: file.bucket.name,
@@ -398,6 +422,19 @@ describe('File', function() {
         });
     });
 
+    it('should emit response event from request', function(done) {
+      var response = {
+        headers: { 'x-goog-hash': 'md5=fakefakefake' }
+      };
+      request_Override = getFakeRequest('body', response);
+
+      file.createReadStream({ validation: false })
+        .on('response', function(res) {
+          assert.deepEqual(response, res);
+          done();
+        })
+    });
+
     it('should get readable stream from request', function(done) {
       var fakeRequest = { a: 'b', c: 'd' };
 
@@ -442,28 +479,6 @@ describe('File', function() {
         }
       };
 
-      function getFakeRequest(data, fakeResponse) {
-        function FakeRequest(req) {
-          if (!(this instanceof FakeRequest)) {
-            return new FakeRequest(req);
-          }
-
-          var that = this;
-
-          stream.Readable.call(this);
-          this._read = function() {
-            this.push(data);
-            this.push(null);
-          };
-
-          setImmediate(function() {
-            that.emit('complete', fakeResponse);
-          });
-        }
-        nodeutil.inherits(FakeRequest, stream.Readable);
-        return FakeRequest;
-      }
-
       beforeEach(function() {
         file.metadata.mediaLink = 'http://uri';