POST 请求给出 FileNotFoundException

zoe*_*vas 5 android filenotfoundexception http-post httpurlconnection http-status-code-400

POST 请求给出 URL 的 FileNotFoundException

我正在android中向 Url https://nitos.gr发出 Http POST 请求。

该url没有域名。Stackoverflow 不允许我在文本中包含带有数字的 URL,因此我只是编写一个随机 URL https://nitos.gr来作为示例。

我收到400 响应代码,并打印 getErrorStream() 给出 libcore.net.http.UnknownLengthHttpInputStream@41eba330

但是,我成功执行了 HTTP GET 请求。url 是https,因此我有一个允许所有 SSL 连接的假信任管理器。

总之:

协议: HTTPS

GET请求:成功

POST 请求:失败

请求代码: 400

错误消息: java.io.FileNotFoundException: https: //nitos.gr

错误流: java.io.FileNotFoundException: https: //nitos.gr

执行 POST 请求的方法如下:

public void setTestbedData(String path, String data) {
        HttpURLConnection con = null;

        try {
            con = (HttpURLConnection) ( new URL(Constants.BASE_URL + path)).openConnection();
             // If you invoke the method setDoOutput(true) on the URLConnection, it will always use the POST method.
            con.setRequestMethod("POST");
            con.setDoInput(true);
            con.setDoOutput(true);

            con.setRequestProperty("Accept", "application/json");
            con.setRequestProperty("Content-Type", "application/json");

            Log.i("data", data);    

            OutputStream outputStream = con.getOutputStream();
            outputStream.write(data.getBytes());
            outputStream.flush();

            Log.w("RESPONSE CODE", "code " + con.getResponseCode());

            Log.w("this is connection ",""+con); 
            InputStream errorstream = con.getErrorStream();             
            Log.w("GetErrorStream  ", ""+errorstream);

            InputStream _is;
            if (con.getResponseCode() >= 400) {  
                _is = con.getInputStream();  
            } else {  

                _is = con.getErrorStream();  

                String result = getStringFromInputStream(_is);
                Log.i("Error != 400", result);
            }


            if (con.getResponseCode() != 200) {
                throw new RuntimeException("Failed : HTTP error code : "
                    + con.getResponseCode());
            }



            BufferedReader responseBuffer = new BufferedReader(new InputStreamReader((con.getInputStream())));

            String output;
            Log.i("TestbedHttpClient","Output from Server:");
            while ((output = responseBuffer.readLine()) != null) {
                Log.i("Output",output);
            }

            con.disconnect();

            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

    }
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错误信息:

响应代码(18936):代码 400 libcore.net.http.HttpsURLConnectionImpl$HttpUrlConnectionDelegate:https: //nitos.gr GetErrorStream(18936):libcore.net.http.UnknownLengthHttpInputStream@41eba330 System.err(18936):java.io。 FileNotFoundException:https: //nitos.gr System.err(18936):位于 libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:186)

hgo*_*ebl 5

替换以下代码

        Log.w("this is connection ",""+con); 
        InputStream errorstream = con.getErrorStream();             
        Log.w("GetErrorStream  ", ""+errorstream);

        InputStream _is;
        if (con.getResponseCode() >= 400) {  
            _is = con.getInputStream();  
        } else {  

            _is = con.getErrorStream();  

            String result = getStringFromInputStream(_is);
            Log.i("Error != 400", result);
        }
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        InputStream _is;
        if (con.getResponseCode() / 100 == 2) { // 2xx code means success
            _is = con.getInputStream();  
        } else {  

            _is = con.getErrorStream();  

            String result = getStringFromInputStream(_is);
            Log.i("Error != 2xx", result);
        }
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或者换句话说:getInputStream()当HTTP状态码大于或等于400时,从读取没有意义。事情没那么简单,也许你还必须处理一些3xx代码。查看HTTP 状态代码列表

最后一句话:如果您觉得使用起来很麻烦,您可以使用此处HttpURLConnection列出的抽象库之一。