fix cfug#365

Author: wendux

example/test.dart

@@ -1,3 +1,5 @@
+import 'dart:typed_data';
+
 import 'package:dio/dio.dart';
 void getHttp() async {
   try {
@@ -9,5 +11,10 @@ void getHttp() async {
 }
 
 main() async{
-  await getHttp();
+//  await getHttp();
+//  Stream<Uint8List> t =Stream.empty();
+//  Stream<List<int>> v=Stream.empty();
+//  print(v is Stream<Uint8List>);
+//  print (t is Stream<List<int>> );
+//  print(t is Stream<Uint8List>);
 }

package_src/CHANGELOG.md

@@ -1,3 +1,7 @@
+# 2.1.11
+
+- fix #365
+
 # 2.1.10
 
 - fix #360

package_src/lib/src/adapter.dart

@@ -169,6 +169,7 @@ class DefaultHttpClientAdapter extends HttpClientAdapter {
     } else {
       stream=responseStream.cast<Uint8List>();
     }
+
     return ResponseBody(
       stream,
       responseStream.statusCode,

package_src/lib/src/dio.dart

@@ -828,14 +828,14 @@ class Dio {
 
   Future<Stream<Uint8List>> _transformData(RequestOptions options) async {
     var data = options.data;
-    Uint8List bytes;
-    Stream<Uint8List> stream;
+    List<int> bytes;
+    Stream stream;
     if (data != null && ["POST", "PUT", "PATCH", "DELETE"].contains(options.method)) {
       // Handle the FormData
       int length;
       if (data is Stream) {
-        assert(data is Stream<Uint8List>,
-            "Stream type must be `Stream<Uint8List>`, but ${data.runtimeType} is found.");
+        assert(data is Stream<List>,
+            "Stream type must be `Stream<List>`, but ${data.runtimeType} is found.");
         stream = data;
         options.headers.keys.any((String key) {
           if (key.toLowerCase() == HttpHeaders.contentLengthHeader) {
@@ -849,7 +849,7 @@ class Dio {
           options.headers[HttpHeaders.contentTypeHeader] =
           'multipart/form-data; boundary=${data.boundary.substring(2)}';
         }
-        stream=data.stream.cast<Uint8List>();
+        stream=data.stream;
         length = data.length;
       } else {
         // Call request transformer.
@@ -863,7 +863,7 @@ class Dio {
         // support data sending progress
         length = bytes.length;
 
-        var group = new List<Uint8List>();
+        var group = List<List<int>>();
         const size = 1024;
         int groupCount = (bytes.length / size).ceil();
         for (int i = 0; i < groupCount; ++i) {
@@ -872,14 +872,15 @@ class Dio {
         }
         stream = Stream.fromIterable(group);
       }
+
       options.headers[HttpHeaders.contentTypeHeader] ??=
           options.contentType.toString();
       if (length != null) {
         options.headers[HttpHeaders.contentLengthHeader] = length;
       }
       int complete = 0;
       Stream<Uint8List> byteStream =
-          stream.transform(StreamTransformer.fromHandlers(
+          stream.cast<Uint8List>().transform(StreamTransformer.fromHandlers(
         handleData: (data, sink) {
           if (options.cancelToken != null && options.cancelToken.isCancelled) {
             sink

package_src/pubspec.yaml

@@ -1,6 +1,6 @@
 name: dio
 description: A powerful Http client for Dart, which supports Interceptors, FormData, Request Cancellation, File Downloading, Timeout etc.
-version: 2.1.10
+version: 2.1.11
 homepage: https://github.com/flutterchina/dio
 author: wendux <[email protected]>