Upload and POST file to PHP page with Java
Even though the thread is very old, there may still be someone around looking for a more easy way to solve this problem (like me :))
After some research I found a way to uplaod a file without changing the original poster's Java-Code. You just have to use the following PHP-code:
<?php
$filename="abc.xyz";
$fileData=file_get_contents('php://input');
$fhandle=fopen($filename, 'wb');
fwrite($fhandle, $fileData);
fclose($fhandle);
echo("Done uploading");
?>
This code is just fetching the raw data sent by the java-application and writing it into a file. There is, however one problem: You dont get the original filename, so you have to transmit it somehow else.
I solved this problem by using a GET-Parameter, which makes a little change in the Java-code necessary:
HttpURLConnection httpUrlConnection = (HttpURLConnection)new URL("http://www.mypage.org/upload.php").openConnection();
changes to
HttpURLConnection httpUrlConnection = (HttpURLConnection)new URL("http://www.mypage.org/upload.php?filename=abc.def").openConnection();
In your PHP-script you change the line
$filename="abc.xyz";
to
$filename=$_GET['filename'];
This solution doesn't use any external librarys and seems to me much more simple than some of the other posted ones...
Hope I could help anyone:)
This is an old thread, but for the benefit of others, here is a fully working example of exactly what the op asks for:
PHP server code:
<?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!";
}
?>
Java client code:
import java.io.OutputStream;
import java.io.InputStream;
import java.net.URLConnection;
import java.net.URL;
import java.net.Socket;
public class Main {
private final String CrLf = "\r\n";
public static void main(String[] args) {
Main main = new Main();
main.httpConn();
}
private void httpConn() {
URLConnection conn = null;
OutputStream os = null;
InputStream is = null;
try {
URL url = new URL("http://localhost/test/post.php");
System.out.println("url:" + url);
conn = url.openConnection();
conn.setDoOutput(true);
String postData = "";
InputStream imgIs = getClass().getResourceAsStream("/test.jpg");
byte[] imgData = new byte[imgIs.available()];
imgIs.read(imgData);
String message1 = "";
message1 += "-----------------------------4664151417711" + CrLf;
message1 += "Content-Disposition: form-data; name=\"uploadedfile\"; filename=\"test.jpg\""
+ CrLf;
message1 += "Content-Type: image/jpeg" + CrLf;
message1 += CrLf;
// the image is sent between the messages in 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.getOutputStream();
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;
} 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.getInputStream();
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 {
} catch (Exception e) {
}
}
}
}
you can figure out how to adapt it for your site, but I have tested the above code and it works. I can't take credit for it though >> See Original Post
You need to use a form-multipart encoded post for PHP to be able to read it the way you are attempting. This website outlines a good way to do it and has links to libraries that can help you out.
All above answers are 100% correct. You can also use plain sockets, in which case your method would look like this:
// 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();
}