Here is a code snipet that I'm using that works:
The code is used in a client side Bean from within
an applet.
The only difference I see is that I call
setAllowUserInteraction() on the connection and use
writeBytes(buf) directly on the ouput stream object returned
from UrlConnection.getOutputStream();
Good Luck
Chris. :-)
System.out.println("-- Built cmdstr = " + cmdstr );
// UUENCODE the varibale value list pairs
cmdstr = URLEncoder.encode(cmdstr);
System.out.println("-- Encoded cmdstr = " + cmdstr );
// build the post request now
URL url = new URL("http://" + commandUrlSpec + "/servlet/" +
functionTarget );
System.out.println("-- Created URL Obj from command str: " + url.toString()
);
try
{
// execute the request and get the response from
// the server
URLConnection urlConnection = url.openConnection();
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.setAllowUserInteraction(false);
// send the data
DataOutputStream out = new DataOutputStream(urlConnection.getOutputStream());
out.writeBytes(cmdstr);
out.close();
// retreive the response
//DataInputStream urlData = new
DataInputStream(urlConnection.getInputStream());
BufferedReader urlData = new BufferedReader(new
InputStreamReader(urlConnection.getInputStream()));
System.out.println(" got response from sever " );
// the first line tagged with "RESPONSE%" which is the
// return code from the server function
String data ;
boolean bResponseFound = false;
while (( data = urlData.readLine()) != null)
{
// if "#RESPONSE#" tag found process it and set all operations after
// that to build the result set
if(data.startsWith("#RESPONSE#$"))
{
bResponseFound = true;
break;
}// end if
} // end while
urlData.close();
// if
John Baker wrote:
> Hiya,
>
> I've been messing about with firewall tunneling recently, but am having
> massive problems with URLConnection. It seems that there is one combination
> of sequence of events and streams used which actually makes it work.. take
> the Post method for example.. the online docs say the client should do the
> following:
>
> private final String serverURLin = new String("http://localhost:9876/");
> private URLConnection urlConClientIn;
> private PrintStream clientOutStream;
>
> <snip>
>
> urlConClientOut = (new URL(serverURLin)).openConnection();
> urlConClientOut.setDoOutput(true);
> urlConClientOut.setUseCaches(false);
> clientOutStream = new PrintStream( urlConClientOut.getOutputStream() );
> clientOutStream.println("Linux");
> clientOutStream.println("Is");
> clientOutStream.println("Lovely");
> clientOutStream.close();
>
> Yet this doesnt seem to send anything to the server. Now I know the server
> is running ok because by entering http://localhost:9876/ in netscape, it
> connects and the server gets all the header information from the url
> request.. so what's wrong with that client?
>
> Here is the server code I have:
>
> private Socket socketIn;
> private DataInputStream sInStream;
>
> <snip stuff to assign socketIn a Socket from ServerSocket.accept()>
>
> sInStream = new DataInputStream
> (new BufferedInputStream(socketIn.getInputStream()));
>
> int contentLength = 0;
> String inStr;
>
> // Read the headers
> do
> {
> inStr = sInStream.readLine();
> System.out.println(inStr);
> // if inStr has Content-length, read the
> // length into a variable here
> if (inStr.startsWith("Content-length:"))
> {
> String s =
> inStr.substring(16, inStr.length());
> System.out.println("Got clength "+s);
> contentLength = Integer.parseInt(s.trim());
> }
> } while (!inStr.equals (""));
>
> But it always gets 'stuck' at the sInStream.readLine() !
>
> If anyone has any pointers, or working code which does roughly the same
> as this, please help!
>
> Ta,
>
> John Baker
>
> --
> John Baker, Software Engineer, Java coder, Salad sarnie lover.
> Work: (01203) 562000 ext 4153
> Home: (01203) 601890
