如何在Android命令中包含中文或空格時發送HTTP命令？

Question

我正在開發一個應用程序，它可以使用IP攝像頭。

以下命令格式適用於IP攝像機。 http://192.72.1.1/config?set&value=XXXXX

而且我可以鍵入任何值併發送到IP攝像機。

當命令是http://192.72.1.1/config?set&value=111，它可以發送到IP攝像機。 IP攝像機也響應正常。

但是當我嘗試發送包含空格或中文的命令時，它會失敗。

1. http://192.72.1.1/config?set&value=111 222

2. http://192.72.1.1/config?set&value=二三四

的代碼是這樣的：

public static String sendRequest(URL url) { 

     try { 
      //Show the command 
      Log.i("CameraCommand", url.toString()) ; 

      HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection() ; 

      urlConnection.setUseCaches(false) ; 
      urlConnection.setDoInput(true) ; 

      urlConnection.setConnectTimeout(3000) ; 
      urlConnection.setReadTimeout(8000) ; 

      urlConnection.connect() ; 

      int responseCode = urlConnection.getResponseCode() ; 

      Log.i("CameraControlFragment", "responseCode = " + urlConnection.getResponseCode()) ; 

      if (responseCode != HttpURLConnection.HTTP_OK) { 

       return null ; 
      } 

      InputStream inputStream = urlConnection.getInputStream() ; 

      Writer writer = new StringWriter() ; 

      char[] buffer = new char[1024] ; 
      try { 
       Reader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8")) ; 
       int n ; 
       while ((n = reader.read(buffer)) != -1) { 
        writer.write(buffer, 0, n) ; 
       } 
      } finally { 
       inputStream.close() ; 
      } 
      String string = writer.toString() ; 
      Log.i("CameraControlFragment", "string = " + string) ; 

      return string ; 

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

     return null ; 
    } 

當命令包括空間或中國，它顯示以下日誌：

08-17 18:13:18.105: W/System.err(22120): java.net.ProtocolException: Unexpected status line: HTTP/0.0 400 Bad Request 
08-17 18:13:18.105: W/System.err(22120): at com.android.okhttp.internal.http.StatusLine.<init>(StatusLine.java:38) 
08-17 18:13:18.105: W/System.err(22120): at com.android.okhttp.internal.http.HttpConnection.readResponse(HttpConnection.java:180) 
08-17 18:13:18.105: W/System.err(22120): at com.android.okhttp.internal.http.HttpTransport.readResponseHeaders(HttpTransport.java:101) 
08-17 18:13:18.105: W/System.err(22120): at com.android.okhttp.internal.http.HttpEngine.readResponse(HttpEngine.java:628) 
08-17 18:13:18.105: W/System.err(22120): at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:388) 
08-17 18:13:18.105: W/System.err(22120): at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:332) 
08-17 18:13:18.106: W/System.err(22120): at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:500) 
08-17 18:13:18.106: W/System.err(22120): at tw.com.WIFI_CAM_R660.IPCamViewer.CameraCommand.sendRequest(CameraCommand.java:734) 
08-17 18:13:18.106: W/System.err(22120): at tw.com.WIFI_CAM_R660.IPCamViewer.CameraCommand$SendRequest.doInBackground(CameraCommand.java:773) 
08-17 18:13:18.106: W/System.err(22120): at tw.com.WIFI_CAM_R660.IPCamViewer.CameraCommand$SendRequest.doInBackground(CameraCommand.java:1) 
08-17 18:13:18.106: W/System.err(22120): at android.os.AsyncTask$2.call(AsyncTask.java:292) 
08-17 18:13:18.106: W/System.err(22120): at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
08-17 18:13:18.106: W/System.err(22120): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
08-17 18:13:18.106: W/System.err(22120): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
08-17 18:13:18.106: W/System.err(22120): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
08-17 18:13:18.106: W/System.err(22120): at java.lang.Thread.run(Thread.java:818) 

的CameraCommand.java:734爲int responseCode = urlConnection.getResponseCode();

有人知道如何發送包含空格和中文的命令嗎？

在此先感謝。

Answer 1

您需要先編碼您的URL，以便它可以在查詢字符串中傳輸。

您需要爲個別參數本身執行此操作。例如：

String encodedValue = URLEncoder.encode(value, "UTF-8"); 
String url = "http://192.72.1.1/config?set&value=" + encodedValue; 
String result = sendRequest(url); 

Answer 2

使用Knossos提供的解決方案，或者如果您具有硬編碼的命令值，則可以手動對它們進行編碼。

http://www.w3schools.com/tags/ref_urlencode.asp