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copied!<p>All above answers are 100% correct. You can also use plain sockets, in which case your method would look like this:</p> <pre><code> // Compose the request header StringBuffer buf = new StringBuffer(); buf.append("POST "); buf.append(uploader.getUploadAction()); buf.append(" HTTP/1.1\r\n"); buf.append("Content-Type: multipart/form-data; boundary="); buf.append(boundary); buf.append("\r\n"); buf.append("Host: "); buf.append(uploader.getUploadHost()); buf.append(':'); buf.append(uploader.getUploadPort()); buf.append("\r\n"); buf.append("Connection: close\r\n"); buf.append("Cache-Control: no-cache\r\n"); // Add cookies List cookies = uploader.getCookies(); if (!cookies.isEmpty()) { buf.append("Cookie: "); for (Iterator iterator = cookies.iterator(); iterator.hasNext(); ) { Parameter parameter = (Parameter)iterator.next(); buf.append(parameter.getName()); buf.append('='); buf.append(parameter.getValue()); if (iterator.hasNext()) buf.append("; "); } buf.append("\r\n"); } buf.append("Content-Length: "); // Request body StringBuffer body = new StringBuffer(); List fields = uploader.getFields(); for (Iterator iterator = fields.iterator(); iterator.hasNext();) { Parameter parameter = (Parameter) iterator.next(); body.append("--"); body.append(boundary); body.append("\r\n"); body.append("Content-Disposition: form-data; name=\""); body.append(parameter.getName()); body.append("\"\r\n\r\n"); body.append(parameter.getValue()); body.append("\r\n"); } body.append("--"); body.append(boundary); body.append("\r\n"); body.append("Content-Disposition: form-data; name=\""); body.append(uploader.getImageFieldName()); body.append("\"; filename=\""); body.append(file.getName()); body.append("\"\r\n"); body.append("Content-Type: image/pjpeg\r\n\r\n"); String boundary = "WHATEVERYOURDEARHEARTDESIRES"; String lastBoundary = "\r\n--" + boundary + "--\r\n"; long length = file.length() + (long) lastBoundary.length() + (long) body.length(); long total = buf.length() + body.length(); buf.append(length); buf.append("\r\n\r\n"); // Upload here InetAddress address = InetAddress.getByName(uploader.getUploadHost()); Socket socket = new Socket(address, uploader.getUploadPort()); try { socket.setSoTimeout(60 * 1000); uploadStarted(length); PrintStream out = new PrintStream(new BufferedOutputStream(socket.getOutputStream())); out.print(buf); out.print(body); // Send the file byte[] bytes = new byte[1024 * 65]; int size; InputStream in = new BufferedInputStream(new FileInputStream(file)); try { while ((size = in.read(bytes)) > 0) { total += size; out.write(bytes, 0, size); transferred(total); } } finally { in.close(); } out.print(lastBoundary); out.flush(); // Read the response BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream())); while (reader.readLine() != null); } finally { socket.close(); } </code></pre>

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