OutputStreamでのHttpポスト例外

Question

私はhttpポストリクエストを発行しようとしています。問題は私が例外を受けていることです。DataOutputStream、どこか知っているのは分かりません。

コードが

public string sendFileToServer(string filename, string targetUrl) 
    { 
     string response = "error"; 
     Log.Error("Image filename", filename); 
     Log.Info("url", targetUrl); 
     HttpURLConnection connection = null; 
     DataOutputStream outputStream = null; 
     // DataInputStream inputStream = null; 

     string pathToOurFile = filename; 
     string urlServer = targetUrl; 
     string lineEnd = "\r\n"; 
     string twoHyphens = "--"; 
     string boundary = "*****"; 
     Java.Text.DateFormat df = new SimpleDateFormat("yyyy_MM_dd_HH:mm:ss"); 

     int bytesRead, bytesAvailable, bufferSize; 
     byte[] buffer; 
     int maxBufferSize = 1 * 1024; 
     try 
     { 
      FileInputStream fileInputStream = new FileInputStream(new File(
        pathToOurFile)); 

      URL url = new URL(urlServer); 
      connection = (HttpURLConnection)url.OpenConnection(); 

      // Allow Inputs & Outputs 
      connection.DoInput = true; 
      connection.DoOutput = true; 
      connection.UseCaches = false; 
      connection.SetChunkedStreamingMode(1024); 
      // Enable POST method 
      connection.RequestMethod = "POST"; 

      connection.SetRequestProperty("Connection", "Keep-Alive"); 
      connection.SetRequestProperty("Content-Type", 
        "multipart/form-data;boundary=" + boundary); 

      outputStream = new DataOutputStream(connection.OutputStream); 
      outputStream.WriteBytes(twoHyphens + boundary + lineEnd); 

      string connstr = null; 
      connstr = "Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" 
        + pathToOurFile + "\"" + lineEnd; 
      Log.Info("Connstr", connstr); 

      outputStream.WriteBytes(connstr); 
      outputStream.WriteBytes(lineEnd); 

      bytesAvailable = fileInputStream.Available(); 
      bufferSize = Java.Lang.Math.Min(bytesAvailable, maxBufferSize); 
      buffer = new byte[bufferSize]; 

      // Read file 
      bytesRead = fileInputStream.Read(buffer, 0, bufferSize); 
      Log.Error("Image length", bytesAvailable + ""); 
      try 
      { 
       while (bytesRead > 0) 
       { 
        try 
        { 
         outputStream.Write(buffer, 0, bufferSize); 
        } 
        catch (OutOfMemoryError e) 
        { 
         e.PrintStackTrace(); 
         response = "outofmemoryerror"; 
         return response; 
        } 
        bytesAvailable = fileInputStream.Available(); 
        bufferSize = Java.Lang.Math.Min(bytesAvailable, maxBufferSize); 
        bytesRead = fileInputStream.Read(buffer, 0, bufferSize); 
       } 
      } 
      catch (Java.Lang.Exception e) 
      { 
       e.PrintStackTrace(); 
       response = "error"; 
       return response; 
      } 
      outputStream.WriteBytes(lineEnd); 
      outputStream.WriteBytes(twoHyphens + boundary + twoHyphens 
        + lineEnd); 

      // Responses from the server (code and message) 
      int serverResponseCode = (int)connection.ResponseCode; 
      string serverResponseMessage = connection.ResponseMessage; 
      Log.Info("Server Response Code ", "" + serverResponseCode); 
      Log.Info("Server Response Message", serverResponseMessage); 

      if (serverResponseCode == 200) 
      { 
       response = "true"; 
      } 

      string CDate = null; 
      Date serverTime = new Date(connection.Date); 
      try 
      { 
       CDate = df.Format(serverTime); 
      } 
      catch (Java.Lang.Exception e) 
      { 
       e.PrintStackTrace(); 
       Log.Error("Date Exception", e.Message + " Parse Exception"); 
      } 
      Log.Info("Server Response Time", CDate + ""); 

      filename = CDate 
        + filename.Substring(filename.LastIndexOf("."), 
          filename.Length); 
      Log.Info("File Name in Server : ", filename); 

      fileInputStream.Close(); 
      outputStream.Flush(); 
      outputStream.Close(); 
      outputStream = null; 
     } 
     catch (Java.Lang.Exception ex) 
     { 
      // Exception handling 
      response = "error"; 
      Log.Error("Send file Exception", ex.Message + ""); 
      ex.PrintStackTrace(); 
     } 
     return response; 
    } 

あり、ここで例外で印刷されたフルスタックトレースです：

05-29 01:49:10.059 W/System.err(22768): android.os.NetworkOnMainThreadException 
05-29 01:49:10.450 W/System.err(22768):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1108) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.io.IoBridge.connectErrno(IoBridge.java:133) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.io.IoBridge.connect(IoBridge.java:118) 
05-29 01:49:10.450 W/System.err(22768):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 
05-29 01:49:10.450 W/System.err(22768):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 
05-29 01:49:10.450 W/System.err(22768):  at java.net.Socket.connect(Socket.java:849) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:77) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:303) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80) 
05-29 01:49:10.450 W/System.err(22768):  at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188) 
05-29 01:49:10.450 W/System.err(22768):  at mono.android.view.View_OnClickListenerImplementor.n_onClick(Native Method) 
05-29 01:49:10.450 W/System.err(22768):  at mono.android.view.View_OnClickListenerImplementor.onClick(View_OnClickListenerImplementor.java:29) 
05-29 01:49:10.450 W/System.err(22768):  at android.view.View.performClick(View.java:3574) 
05-29 01:49:10.450 W/System.err(22768):  at android.view.View$PerformClick.run(View.java:14279) 
05-29 01:49:10.450 W/System.err(22768):  at android.os.Handler.handleCallback(Handler.java:605) 
05-29 01:49:10.450 W/System.err(22768):  at android.os.Handler.dispatchMessage(Handler.java:92) 
05-29 01:49:10.450 W/System.err(22768):  at android.os.Looper.loop(Looper.java:137) 
05-29 01:49:10.450 W/System.err(22768):  at android.app.ActivityThread.main(ActivityThread.java:4441) 
05-29 01:49:10.450 W/System.err(22768):  at java.lang.reflect.Method.invokeNative(Native Method) 
05-29 01:49:10.450 W/System.err(22768):  at java.lang.reflect.Method.invoke(Method.java:511) 
05-29 01:49:10.450 W/System.err(22768):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823) 
05-29 01:49:10.460 W/System.err(22768):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590) 
05-29 01:49:10.460 W/System.err(22768):  at dalvik.system.NativeStart.main(Native Method) 

私はURLをテストしてきたし、私は他の場所でそれを使用していて何の問題がそれでありません私のコード。私のコードで何が間違っていますか？

Answer 1

例外はありますか？より良い情報を与えてください。あなたはNetworkOnMainThreadExceptionを持っていますが、それ以外の場合は、ネットワークコードをAsyncTaskまたはスレッドに入れることが解決策であることがわかっているでしょう。あなたが行うので

Answer 2

import java.io.BufferedReader; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.URL; 

public class HttpConnection { 
    public String readUrl(String mapsApiDirectionsUrl) throws Exception { 
     String data = ""; 
     String line = ""; 
     StringBuffer sb = new StringBuffer(); 

     URL url; 
     HttpURLConnection urlConnection = null; 
     InputStream iStream = null; 
     InputStreamReader iStreamReader = null; 
     BufferedReader br = null; 
     BufferedWriter writer = null; 

     try{ 
      url = new URL(mapsApiDirectionsUrl); 
      urlConnection = (HttpURLConnection) url.openConnection(); 
      urlConnection.setRequestMethod("GET"); 
      urlConnection.setRequestProperty("User-Agent", "PPT"); 
      urlConnection.setDoOutput(true); 

      writer = new BufferedOutputStream(urlConnection.getOutputStream()); 
      writer.write("POST DATA HERE"); 
      writer.flush(); 
      writer.close(); 

      iStream = urlConnection.getInputStream(); 
      iStreamReader = new InputStreamReader(iStream); 
      br = new BufferedReader(iStreamReader); 

      while ((line = br.readLine()) != null) { 
       sb.append(line); 
      } 
      data = sb.toString(); 

      return data; 
     } finally { 
      br.close(); 
      iStreamReader.close(); 
      iStream.close(); 
      urlConnection.disconnect(); 
     } 
    } 

} 

Answer 3

import java.io.BufferedReader; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.URL; 

public class HttpConnection { 
    public String readUrl(String Url) throws Exception { 
     String data = ""; 
     String line = ""; 
     StringBuffer sb = new StringBuffer(); 


     URL url; 
     HttpURLConnection urlConnection = null; 
     InputStream iStream = null; 
     InputStreamReader iStreamReader = null; 
     BufferedReader br = null; 
     BufferedWriter writer = null; 

     try{ 
      // create server connection using URL path 
      url = new URL(Url); 
      urlConnection = (HttpURLConnection) url.openConnection(); 
      urlConnection.setRequestMethod("POST"); 
      urlConnection.setRequestProperty("User-Agent", "PPT"); 
      urlConnection.setDoOutput(true); 

      // post data to server using POST method not GET 
      writer = new BufferedOutputStream(urlConnection.getOutputStream()); 
      writer.write("POST DATA HERE"); 
      writer.flush(); 
      writer.close(); 

      // this get all data that server send to you, the response data 
      iStream = urlConnection.getInputStream(); 
      iStreamReader = new InputStreamReader(iStream); 
      br = new BufferedReader(iStreamReader); 

      while ((line = br.readLine()) != null) { 
       sb.append(line); 
      } 
      data = sb.toString(); 

      return data; 
     } finally { 
      // all connections are closed 
      br.close(); 
      iStreamReader.close(); 
      iStream.close(); 
      urlConnection.disconnect(); 
     } 
    } 

}