iOS communication between application and jsp

[sagarshivam]

Dear All,

I am trying to pass some values (like username and password) from my application to some jsp file lying on some server. And code for this is:

NSString *post = [NSString stringWithFormat:@"username=%@&password=%@",username, password];	
	NSData *postdata = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
	request= [[[NSMutableURLRequest alloc] init] autorelease];
	[request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://128.9.45.182:8080/DV_DEMO/jsp/test.jsp"]]];
	[request setHTTPMethod:@"POST"];
	[request setHTTPBody:postdata];
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

I am also using all the NSURLConnection delegate in the program
And in the jsp file,

<% 
String username = request.getParameter("username") ;
String password = request.getParameter("password");
out.println(username + password);
%>

And I am getting proper value in the jsp.
But now I want to return back some string to the application.Say after username and password verification, some string should be returned back to the application. How this can be done?

 

[jiminaus]

Have a look at the overview in the documentation for NSURLConnection. You'll need to implement connection:didReceiveResponse: and connection:didReceiveData: in your NSConnection's delegate.

Alternatively use sendSynchronousRequest:returningResponse:error: on a secondary thread. Grand Central Dispatch is a good mechanism for this.

 

[sagarshivam]

I added further to my code:

NSURLResponse *response;
	NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
	NSString *serveroutput= [[NSString alloc]initWithData:data encoding:NSASCIIStringEncoding];
	NSLog(@"serve response is %@", serveroutput);

But in this case I am getting the whole jsp code.
I want some variable's value (say String var defined in jsp).
How is that possible.May ne using httpheaderfield or anything else, I am not aware of it.


Thanks

 

[jiminaus]

If you're getting the JSP code back, then that's what your server is sending back. You can confirm by trying to go the same URL with a browser. This sounds like a configuration error on your server.

 

[sagarshivam]

Thanks a lot!

Actually it was the data, server is sending back. Now I am getting what really I want.