NSURLConnection JSON Submit to Server - ios

Question

I am at a loss here, I thought I'd try something new with web services for my app.
I can pull data down no problem, but I am trying to post to the server and just can seem to get this to even fire.
What I am intending to happen is on submit button press the action be fired:
- (IBAction)didPressSubmit:(id)sender {
//JSON SERIALIZATION OF DATA
NSMutableDictionary *projectDictionary = [NSMutableDictionary dictionaryWithCapacity:1];
[projectDictionary setObject:[projectName text] forKey:#"name"];
[projectDictionary setObject:[projectDescShort text] forKey:#"desc_short"];
[projectDictionary setObject:[projectDescLong text] forKey:#"desc_long"];
NSError *jsonSerializationError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:projectDictionary options:NSJSONWritingPrettyPrinted error:&jsonSerializationError];
if(!jsonSerializationError) {
NSString *serJSON = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(#"Serialized JSON: %#", serJSON);
} else {
NSLog(#"JSON Encoding Failed: %#", [jsonSerializationError localizedDescription]);
}
// JSON POST TO SERVER
NSURL *projectsUrl = [NSURL URLWithString:#"http://70.75.66.136:3000/projects.json"];
NSMutableURLRequest *dataSubmit = [NSMutableURLRequest requestWithURL:projectsUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];
[dataSubmit setHTTPMethod:#"POST"]; // 1
[dataSubmit setValue:#"application/json" forHTTPHeaderField:#"Accept"]; // 2
[dataSubmit setValue:[NSString stringWithFormat:#"%d", [jsonData length]] forHTTPHeaderField:#"Content-Length"]; // 3
[dataSubmit setHTTPBody: jsonData];
[[NSURLConnection alloc] initWithRequest:dataSubmit delegate:self];
}
After that it runs through:
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(#"DidReceiveResponse");
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)theData
{
NSLog(#"DidReceiveData");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
UIAlertView *errorView = [[UIAlertView alloc] initWithTitle:#"Error" message:#"BLAH CHECK YOUR NETWORK" delegate:nil cancelButtonTitle:#"Dismiss" otherButtonTitles:nil];
[errorView show];
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
I am obviously missing something, but I don't even know where to look. All I need is a point in the right direction, any help would be great.
UPDATE
I was able to get the request to fire with the following.
Okay I was able to get the request to fire using the following:
- (IBAction)didPressSubmit:(id)sender {
NSMutableDictionary *projectDictionary = [NSMutableDictionary dictionaryWithCapacity:1];
[projectDictionary setObject:[projectName text] forKey:#"name"];
[projectDictionary setObject:[projectDescShort text] forKey:#"desc_small"];
[projectDictionary setObject:[projectDescLong text] forKey:#"desc_long"];
NSError *jsonSerializationError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:projectDictionary options:NSJSONWritingPrettyPrinted error:&jsonSerializationError];
if(!jsonSerializationError) {
NSString *serJSON = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(#"Serialized JSON: %#", serJSON);
} else {
NSLog(#"JSON Encoding Failed: %#", [jsonSerializationError localizedDescription]);
}
NSURL *projectsUrl = [NSURL URLWithString:#"http://70.75.66.136:3000/projects.json"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:projectsUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];
[request setHTTPMethod:#"POST"]; // 1
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"]; // 2
[request setValue:[NSString stringWithFormat:#"%d", [jsonData length]] forHTTPHeaderField:#"Content-Length"]; // 3
[request setHTTPBody: jsonData]; // 4
(void) [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
But for some reason the post method only received a bunch of nil values, I am getting this from the server side. Processing by ProjectsController#create as JSON
Parameters: {"{\n \"desc_long\" : \"a\",\n \"name\" : \"a\",\n \"desc_small\" : \"a\"\n}"=>nil}
UPDATE 2
With a little read from here: http://elusiveapps.com/blog/2011/04/ios-json-post-to-ruby-on-rails/
I was able to see if missed the following line.
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
So final didPressSubmit code is as follows;
- (IBAction)didPressSubmit:(id)sender {
NSMutableDictionary *projectDictionary = [NSMutableDictionary dictionaryWithCapacity:1];
[projectDictionary setObject:[projectName text] forKey:#"name"];
[projectDictionary setObject:[projectDescShort text] forKey:#"desc_small"];
[projectDictionary setObject:[projectDescLong text] forKey:#"desc_long"];
NSError *jsonSerializationError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:projectDictionary options:NSJSONWritingPrettyPrinted error:&jsonSerializationError];
if(!jsonSerializationError) {
NSString *serJSON = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(#"Serialized JSON: %#", serJSON);
} else {
NSLog(#"JSON Encoding Failed: %#", [jsonSerializationError localizedDescription]);
}
NSURL *projectsUrl = [NSURL URLWithString:#"http://70.75.66.136:3000/projects.json"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:projectsUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];
[request setHTTPMethod:#"POST"]; // 1
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"]; // 2
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:[NSString stringWithFormat:#"%d", [jsonData length]] forHTTPHeaderField:#"Content-Length"]; // 3
[request setHTTPBody: jsonData]; // 4
(void) [[NSURLConnection alloc] initWithRequest:request delegate:self];
}

Answer 1

I got same issue but I resolved it by setting the options to nil.
Replace
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:projectDictionary options:NSJSONWritingPrettyPrinted error:&jsonSerializationError];
by
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:projectDictionary options:nil error:&jsonSerializationError];
Use option to nil if you are sending json to server, if you are displaying json use NSJSONWritingPrettyPrinted.
Hope this will help you.