从Android发送到计算引擎服务器的JSON返回null [英] JSON sent from Android to compute engine server returns null

问题描述

我正在将JSON对象从我的Android应用发送到服务器.在我开发的本地计算机上，它工作正常.我得到数据并解码.但是，当我将服务器部署到计算引擎时，我没有在服务器端收到数据.数据从Android客户端发送.我还从浏览器测试了JSON，并获得了200个响应代码.以下是代码段:

I am sending JSON object from my Android app to my server. In my development local machine it works fine. I get the data and decode it. But when I deployed my server to compute engine, I don't receive the data on the server end. The data is sent from the Android client. I also tested the JSON from my browser and I get 200 response code. Here are the code snippets:

//客户

//在此处创建JSONObject 这是我发送的JSON {"test"，"1234"}

//Create JSONObject here This is the JSON I am sending {"test", "1234"}

JSONObject json = new JSONObject();
json.put("test", args[0]);

String postData=json.toString();

// Send POST output.
OutputStreamWriter os = new OutputStreamWriter(urlConn.getOutputStream(), "UTF-8");
os.write(postData);
Log.e("NOTIFICATION", "Sent");
os.close();

BufferedReader reader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
String msg="";
String line = "";
while ((line = reader.readLine()) != null) {
    msg += line; 
}
Log.i("msg=",""+msg);

//服务器

<?php

   $json = file_get_contents("php://input");
   var_dump($json); //this returns String(0)
   $decoded = json_decode($json, TRUE);
   $pasid = $decoded['test'];

   echo"test if it works";
   var_dump($pasid); //returns null

无论我做什么，Android应用程序都会发送一个字符串，但是在服务器端，我会得到一个空字符串.我至今不知道为什么.

No matter what I do the Android app sends a string but on the server side I am getting empty string. I can't figure out why so far.

推荐答案

原来，该问题是由HttpRLConnection引起的.就像中接受的答案一样这个问题，只需删除"

Turns out the issue is caused by of HttpRLConnection. Just like the accepted answer in this SO question, just remove `

urlConnection.setChunkedStreamingMode(0);

urlConnection.setChunkedStreamingMode(0);

其中 `urlConnection = HttpUrlCooenction();

where `urlConnection = HttpUrlCooenction();

`

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