響應代碼500 Android POST方法

Question

我已閱讀了許多帖子，並且嘗試應用其解決方案，但沒有人爲我工作。我對Java和Android相當陌生。網址是「https」，這不是錯誤。我的java代碼如下：

public class Main3Activity extends AppCompatActivity { 

    Button b1; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main3);   

     b1 = (Button) findViewById(R.id.button_pago); 
     b1.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View v) { 
       try { 
        new SendPostRequest().execute(); 
       } catch (Exception e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
      } 
     }); 

    } 




    public class SendPostRequest extends AsyncTask<String, Void, String> { 

     protected void onPreExecute(){} 

     protected String doInBackground(String... arg0) { 

      try { 

       URL url = new URL("https://www.myweb.com/login_app.php"); 

       JSONObject postDataParams = new JSONObject(); 
       postDataParams.put("precio", "5000"); 
       postDataParams.put("texto", "f...h"); 
       Log.e("params",postDataParams.toString()); 

       HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
       conn.setReadTimeout(15000 /* milliseconds */); 
       conn.setConnectTimeout(15000 /* milliseconds */); 
       conn.setRequestMethod("POST"); 
       conn.setDoInput(true); 
       conn.setDoOutput(true); 

       OutputStream os = conn.getOutputStream(); 
       BufferedWriter writer = new BufferedWriter(
         new OutputStreamWriter(os, "UTF-8")); 
       writer.write(getPostDataString(postDataParams)); 

       writer.flush(); 
       writer.close(); 
       os.close(); 

       int responseCode=conn.getResponseCode(); 

       if (responseCode == HttpsURLConnection.HTTP_OK) { 

        BufferedReader in=new BufferedReader(new 
          InputStreamReader(
          conn.getInputStream())); 

        StringBuffer sb = new StringBuffer(""); 
        String line=""; 

        while((line = in.readLine()) != null) { 

         sb.append(line); 
         break; 
        } 

        in.close(); 
        return sb.toString(); 

       } 
       else { 
        return new String("false : "+responseCode); 
       } 
      } 
      catch(Exception e){ 
       return new String("Exception: " + e.getMessage()); 
      } 

     } 

     @Override 
     protected void onPostExecute(String result) { 
      Toast.makeText(getApplicationContext(), result, 
        Toast.LENGTH_LONG).show(); 
     } 
    } 

    public String getPostDataString(JSONObject params) throws Exception { 

     StringBuilder result = new StringBuilder(); 
     boolean first = true; 

     Iterator<String> itr = params.keys(); 

     while(itr.hasNext()){ 

      String key= itr.next(); 
      Object value = params.get(key); 

      if (first) 
       first = false; 
      else 
       result.append("&"); 

      result.append(URLEncoder.encode(key, "UTF-8")); 
      result.append("="); 
      result.append(URLEncoder.encode(value.toString(), "UTF-8")); 

     } 
     return result.toString(); 
    } 
} 

非常感謝你的時間。

檢查日誌文件中，我發現很多信息類似如下：

81.184.8.77 - - [23/Aug/2016:12:54:05 +0200] "POST /login_app.php HTTP/1.1" 500 379 "-" "Dalvik/1.6.0 (Linux; U; Android 4.4.2; Android SDK built for x86 Build/KK)" "-" 
81.184.8.77 - - [23/Aug/2016:12:59:37 +0200] "POST /login_app.php HTTP/1.1" 500 10793 "-" "Dalvik/2.1.0 (Linux; U; Android 5.1.1; ONE E1001 Build/LMY47V)" "-" 
81.184.8.77 - - [23/Aug/2016:13:01:05 +0200] "POST /login_app.php HTTP/1.1" 500 10807 "-" "Dalvik/1.6.0 (Linux; U; Android 4.4.2; Android SDK built for x86 Build/KK)" "-" 
81.184.8.77 - - [23/Aug/2016:13:01:07 +0200] "POST /login_app.php HTTP/1.1" 500 379 "-" "Dalvik/1.6.0 (Linux; U; Android 4.4.2; Android SDK built for x86 Build/KK)" "-" 

Answer 1

我剛剛找到解決方案：我需要設置allow_url_fopen的值。這個變量可以在php.ini中找到，正如其他人所說的那樣，在我的情況下，該文件無法在服務器中找到，我不得不去我的域名提供商網頁，進入私人區域並尋找php配置。

我希望它可以幫助一些人，和你的幫助

Answer 2

我前一段時間遇到了這個問題。服務器中的日誌將幫助您解決問題。

只是爲了記錄，此類錯誤的日誌通常位於以下位置：var/log/apache2/error.log您可能需要對php.ini文件進行一些更改才能記錄這些錯誤。

希望這有助於:)

Answer 3

您可以瞭解不同類型的此HTTP狀態代碼 https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

500內部服務器錯誤

一般錯誤消息，因爲當意外情況遇到了，沒有更具體的消息是適合的。