将图片从Android上传到PHP服务器

Question

I am trying to upload file to a php server from my android device. There is thread with same question but he is using a different method. My Android side code works fine and shows no error message but server is not receiving any file. here is my sample code, I found it online.

import java.io.FileInputStream;
import android.app.Activity;
import android.os.Bundle;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.util.Log;

public class uploadfile extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    doFileUpload();
}

private void doFileUpload(){
HttpURLConnection conn =    null;
DataOutputStream dos = null;
DataInputStream inStream = null;    
String exsistingFileName = "/sdcard/def.jpg";

// Is this the place are you doing something wrong.
String lineEnd = "rn";
String twoHyphens = "--";
String boundary =  "*****";

int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1*1024*1024;
String responseFromServer = "";
String urlString = "http://192.168.1.6/index.php";

try
    {
        //------------------ CLIENT REQUEST 
        Log.e("MediaPlayer","Inside second Method");
        FileInputStream fileInputStream = new FileInputStream(new    File(exsistingFileName) );

                                        // open a URL connection to the Servlet
                                        URL url = new URL(urlString);

                                        // Open a HTTP connection to the URL
                                        conn = (HttpURLConnection) url.openConnection();

                                        // Allow Inputs
                                        conn.setDoInput(true);

                                        // Allow Outputs
                                        conn.setDoOutput(true);

                                        // Don't use a cached copy.
                                        conn.setUseCaches(false);

                                        // Use a post method.
                                        conn.setRequestMethod("POST");
                                        conn.setRequestProperty("Connection", "Keep-Alive");
                                        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);

                                        dos = new DataOutputStream( conn.getOutputStream() );
                                        dos.writeBytes(twoHyphens + boundary + lineEnd);
                                        dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\""
                                                            + exsistingFileName + "\"" + lineEnd);
                                        dos.writeBytes(lineEnd);
                                        Log.e("MediaPlayer","Headers are written");

                                        // create a buffer of maximum size
                                        bytesAvailable = fileInputStream.available();
                                        bufferSize = Math.min(bytesAvailable, maxBufferSize);
                                        buffer = new byte[bufferSize];

                                        // read file and write it into form...
                                        bytesRead = fileInputStream.read(buffer, 0, bufferSize);

                                        while (bytesRead > 0){
                                                                dos.write(buffer, 0, bufferSize);
                                                                bytesAvailable = fileInputStream.available();
                                                                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                                                                bytesRead = fileInputStream.read(buffer, 0, bufferSize);                                                
                                        }

                                        // send multipart form data necesssary after file data...
                                        dos.writeBytes(lineEnd);
                                        dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

                                        // close streams
                                        Log.e("MediaPlayer","File is written");
                                        fileInputStream.close();
                                        dos.flush();
                                        dos.close();

                    }

      catch (MalformedURLException ex)

     {

           Log.e("MediaPlayer", "error: " + ex.getMessage(), ex);

      }



      catch (IOException ioe)

      {

           Log.e("MediaPlayer", "error: " + ioe.getMessage(), ioe);

      }

      //------------------ read the SERVER RESPONSE
      try {
            inStream = new DataInputStream ( conn.getInputStream() );
            String str;

            while (( str = inStream.readLine()) != null)
            {
                 Log.e("MediaPlayer","Server Response"+str);
            }

            inStream.close();
      }

      catch (IOException ioex){
           Log.e("MediaPlayer", "error: " + ioex.getMessage(), ioex);
      }

    }
    }

and my php server side code is as follows

<?php

 $target_path = "uploads/";

 $target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

 if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['uploadedfile']['name']).
    " has been uploaded";
 } 

 else{
      echo "There was an error uploading the file, please try again!";
   }
   ?>

Apache is running. When i run server, this error msg appears There was an error uploading the file, please try again!. I have checked the log data in eclipse and what i think is the socket problem but i am not sure. Please help if anyone knows the solution.

11-28 05:37:55.310: DEBUG/SntpClient(59): request time failed: java.net.SocketException: Address family not supported by protocol

Answer 1

It seems that the server is not responding to the client. Try uploading using an ftp connection through the Android application, if that works then check your Apache configuration on accepting connections and the writable directories. When I had a similar problem it turned out that my directory gave no write privileges.

Is the error from Java or from Apache?

Answer 2

Change your code in the following way for the correct escape sequences:

Replace

String lineEnd = "rn";

with

String lineEnd = "\r\n";