Http Post Request - iphone

Question

How to make Http Post Request using JSON. I tried every option which is available on Internet.But could not get the Data. So please post entire code to make a request.

Answer 1

You can use below code:
-(void)performRequest{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:#"url"]];
NSString *msgLength = [NSString stringWithFormat:#"%d", [jsonMessage length]];
[request addValue: #"text/xml; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
[request addValue: jsonAction forHTTPHeaderField:#"JSONAction"];
[request addValue: msgLength forHTTPHeaderField:#"Content-Length"];
[request setHTTPMethod:#"POST"];
[request setHTTPBody: [jsonMessage dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
if( theConnection )
{
webData = [[NSMutableData data] retain];
}
else
{
NSLog(#"theConnection is NULL");
}
[pool release];
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
[webData setLength: 0];
self.resultArray = [[NSMutableArray alloc] init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
NSLog(#"ERROR with theConenction");
NSDictionary *errorDic = [NSDictionary dictionaryWithObject:error forKey:#"error"];
[self.resultArray addObject:errorDic];
[connection release];
[webData setLength:0];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSLog(#"DONE. Received Bytes: %d", [webData length]);
NSString *theXML = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding];
NSLog(#"%#", theXML);
[theXML release];
if([webData length] > 0){
parser = [[NSXMLParser alloc] initWithData:webData];
[parser setDelegate:self];
[parser parse];
}
}

Answer 2

Here's a basic example of NSURLConnection POST-ing JSON to an URL.
- (void)performRequest {
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:#"http://someplace.com/"]];
[request setValue:#"Some Value" forHTTPHeaderField:#"Some-Header"];
[request setHTTPBody:#"{\"add_json\":\"here\"}"];
[request setHTTPMethod:#"POST"];
[NSURLConnection connectionWithRequest:[request autorelease] delegate:self];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
// Fail..
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// Request performed.
}