dart2js代码无法加载http响应

Question

This dart code sends a json string to the next server-side code and receives a response back. 此dart代码将json字符串发送到下一个服务器端代码并接收响应。 The dart code works. 飞镖码有效。 But the dart2js-compiled js code fails to load the http response with an error. 但是dart2js编译的js代码无法加载带有错误的http响应。 Is this a bug in dart2js? 这是dart2js中的错误吗？ Or am I doing something wrong? 或者我做错了什么？

Client-side code: 客户端代码：

import 'dart:html';
import 'dart:convert';

void main() {
  querySelector(".button").onClick
    .listen( (e) {
      String url = 'http://127.0.0.1:8480';
      HttpRequest request = new HttpRequest();
      Map data = {
          "int value" : 1,
          "string value": 'Dartlang.'
      };
      String jsonData = JSON.encode(data);
      print("json data sent = " + jsonData);
      request
      ..open("POST", url, async: true)
        ..onLoadStart.listen((e) => print("Started loading"))
        ..onError.listen( (e) =>( print("Error occurred.")))
        ..onTimeout.listen((e) => (print("Server is not responding.")))
        ..onLoad.listen( (e) => (print("Response text = ${request.responseText}")))
            ..send(jsonData);
          });
}

Server-side code: 服务器端代码：

import 'dart:io';
import 'dart:async';
import 'package:http_server/http_server.dart';

void main() {
  print("Listening for HTTP Requests...");

  final HOST = InternetAddress.ANY_IP_V6;
  final PORT = 8480;

  HttpServer.bind(HOST, PORT).then((server) {
    server.transform(new HttpBodyHandler())
    .listen((HttpRequestBody body) {
      HttpRequest request = body.request;
      print("Recieved request from: ${request.connectionInfo.remoteAddress.address}"); 
      var response = request.response;
      addCorsHeaders(response);
      response.write("You sent: ${body.body}");
      response.close();
    });
  });

}

void addCorsHeaders(HttpResponse res) {
  res.headers.add("Access-Control-Allow-Origin", "*, ");
  res.headers.add("Access-Control-Allow-Methods", "POST, GET, OPTIONS");
  res.headers.add("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
}

html: HTML：

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>HttprequestTester</title>
    <link rel="stylesheet" href="httprequesttester.css">
  </head>
  <body>
    <button class='button'>Send HTTP Request</button>

    <script type="application/dart" src="httprequesttester.dart"></script>
    <script src="packages/browser/dart.js"></script>
  </body>
</html>

Answer 1

I tried your code and it works in Dartium (Version 31.0.1650.48 (240209)), Chrome (Version 31.0.1650.63), and Firefox (26.0) on Debian Linux x64. 我尝试了你的代码，它适用于Dartium（版本31.0.1650.48（240209）），Chrome（版本31.0.1650.63）和Debian Linux x64上的Firefox（26.0）。

But I wonder why it works when you serve to IPv6 and access using IPv4 address. 但我想知道为什么当你服务于IPv6并使用IPv4地址访问它时它是有效的。 But I'm not an expert in these matters. 但我不是这些问题的专家。

Answer 2

I suspect this is a bug. 我怀疑这是一个错误。 Can you please file it at https://code.google.com/p/dart/issues ? 您能否在https://code.google.com/p/dart/issues上提交申请？ Add enough code so that others can reproduce the problem. 添加足够的代码，以便其他人可以重现问题。 Thanks. 谢谢。

dart2js代码无法加载http响应

问题描述

2 个解决方案

解决方案1
1 2013-12-27 12:52:03

解决方案2
1 2013-12-27 15:20:46

dart2js代码无法加载http响应

问题描述

2 个解决方案

解决方案1 1 2013-12-27 12:52:03

解决方案2 1 2013-12-27 15:20:46

解决方案1
1 2013-12-27 12:52:03

解决方案2
1 2013-12-27 15:20:46