Bad formatting: Add JSON data to existing URL - ios

Question

I need to send request like this:
"http://api.site.com/login?q={"meta":{"api_key":"cb2f734a14ee3527b3"},"request":{"id":"username#host.name","password":"passw0rd"}}`
...the response to which should look like {"id":399205,"token":"d43f8b2fe37aa19ac7057701"} To do so, I have tried the following code:
self.responseData = [NSMutableData data];
NSDictionary *apiKeyDict = [NSDictionary dictionaryWithObject:#"cb2f734a14ee3527b3" forKey:#"api_key"];
NSDictionary *idPasswordDict = [NSDictionary dictionaryWithObjectsAndKeys:#"tc-d#gmail.com",#"id", #"abc",#"password", nil];
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:apiKeyDict, #"meta", idPasswordDict, #"request", nil];
NSURL *url = [NSURL URLWithString:#"http://api.site.com/login?="];
NSError *error = nil;
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSData *requestData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:[NSString stringWithFormat:#"%d", [requestData length]] forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody: requestData];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if (connection) {
self.recievedData = [NSMutableData data];
}
Later on, I get in the following:
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.recievedData appendData:data];
NSLog(#"%#",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}
The response data comes back as "<h1>CHttpException</h1><p>wrong sign</p>" As I understand, the way of adding json data to the current url is not appropriate in this case. Does anyone have advice on how I can fix this?
resolve my problem. Convert posted json to appended string to base url-string. that's how I did it:
NSData *requestData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
NSMutableString *dictString = [[NSMutableString alloc]initWithData:requestData encoding:NSUTF8StringEncoding];
[dictString insertString:#"http://api.site.com/login?q=" atIndex:0];
//don't know why but dictString contains a lot of #"\n" and spaces to present it nice-formated.
[dictString replaceOccurrencesOfString:#"\n" withString:#"" options:nil range:NSMakeRange(0, dictString.length)];
[dictString replaceOccurrencesOfString:#" " withString:#"" options:nil range:NSMakeRange(0, dictString.length)];
NSURL *url = [NSURL URLWithString:[dictString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
if it helps someone will appreciate tick near this issue=)

Answer 1

You can do it right using AFNetworking library - it's easy to implement and to work with. Whole code you need in this case is quite simple and it was always working well for me.
NSDictionary *apiKeyDict = [NSDictionary dictionaryWithObject:#"cb2f734a14ee3527b3" forKey:#"api_key"];
NSDictionary *idPasswordDict = [NSDictionary dictionaryWithObjectsAndKeys:#"tc-d#gmail.com",#"id", #"abc",#"password", nil];
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:apiKeyDict, #"meta", idPasswordDict, #"request", nil];
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:0 error:nil];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSString *urlString = #"http://api.site.com/login";
NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:jsonString, #"q", nil];
NSURL *url = [NSURL URLWithString:urlString];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
NSMutableURLRequest *request = [httpClient requestWithMethod:#"POST" path:nil parameters:parameters];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
//OK
NSLog(#"%#", JSON);
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
//Response failed
}];
[operation start];