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- 12-02-2008, 03:35 PM #1
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Receive uploaded image / video (byte array) from j2me on jsp.HOW???
currently i'm trying to do a project, it needs to send upload a video to the server and store inside a folder. But i found that it just able to receive a set of data that < 1024bytes, i done that by uploading an image. the code i found is like that.
/************************************************** ***************************
from this code, how should my jsp coding be done to receive the data sent by j2me?Java Code:import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import javax.microedition.io.*; import java.io.*; public class PostFile extends MIDlet implements Runnable, CommandListener{ private final String FILE = "/image.jpg"; private final String URL = "url here"; // change this to a valit page. private final String CrLf = "\r\n"; private Form form = null; private Gauge gauge = null; private Command exitCommand; private Command uploadCommand; public PostFile(){ form = new Form("Upload File"); gauge = new Gauge("Progress:", true, 100, 0); form.append(gauge); exitCommand = new Command("Exit", Command.EXIT, 0); uploadCommand = new Command("Upload", Command.SCREEN, 0); form.addCommand(exitCommand); form.addCommand(uploadCommand); form.setCommandListener(this); } public void startApp() { Display.getDisplay(this).setCurrent(form); } public void pauseApp() { } public void destroyApp(boolean unconditional) { } private void progress(int total, int current){ int percent = (int) (100 * ((float)current/(float)total)); gauge.setValue(percent); } public void run() { httpConn(); } private void httpConn(){ HttpConnection conn = null; OutputStream os = null; InputStream is = null; try{ System.out.println("url:" + URL); conn = (HttpConnection)Connector.open(URL); conn.setRequestMethod(HttpConnection.POST); String postData = ""; InputStream imgIs = getClass().getResourceAsStream(FILE); byte []imgData = new byte[imgIs.available()]; imgIs.read(imgData); String message1 = ""; message1 += "-----------------------------4664151417711" + CrLf; message1 += "Content-Disposition: form-data; name=\"uploadedfile\"; filename=\"" + FILE + "\"" + CrLf; message1 += "Content-Type: image/jpeg" + CrLf; message1 += CrLf; // the image is sent between the messages ni the multipart message. String message2 = ""; message2 += CrLf + "-----------------------------4664151417711--" + CrLf; conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=---------------------------4664151417711"); // might not need to specify the content-length when sending chunked data. // conn.setRequestProperty("Content-Length", String.valueOf((message1.length() + message2.length() + imgData.length))); System.out.println("open os"); os = conn.openOutputStream(); System.out.println(message1); os.write(message1.getBytes()); // SEND THE IMAGE int index = 0; int size = 1024; do{ System.out.println("write:" + index); if((index+size)>imgData.length){ size = imgData.length - index; } os.write(imgData, index, size); index+=size; progress(imgData.length, index); // update the progress bar. }while(index<imgData.length); System.out.println("written:" + index); System.out.println(message2); os.write(message2.getBytes()); os.flush(); System.out.println("open is"); is = conn.openInputStream(); char buff = 512; int len; byte []data = new byte[buff]; do{ System.out.println("READ"); len = is.read(data); if(len > 0){ System.out.println(new String(data, 0, len)); } }while(len>0); System.out.println("DONE"); }catch(Exception e){ e.printStackTrace(); }finally{ System.out.println("Close connection"); try{ os.close(); }catch(Exception e){} try{ is.close(); }catch(Exception e){} try{ conn.close(); }catch(Exception e){} } } public void commandAction(javax.microedition.lcdui.Command command, javax.microedition.lcdui.Displayable displayable) { if(command == exitCommand){ this.notifyDestroyed(); }else if(command == uploadCommand){ new Thread(this).start(); } } }
by modifying the code,i just manage to get a chunk of 1024bytes of a total of 42986bytes image.
can some body help me?
this is urgent for me.thanks...Last edited by angelicsign; 12-02-2008 at 03:49 PM. Reason: change the coding to code tag
- 06-29-2010, 06:21 PM #2
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