How to add some parameters to a JSON request? - ios

Question

Usually, to download a JSON, I use AFNetworking creating a singleton with this code
- (void)getJSON {
NSURLRequest * request =
[NSURLRequest requestWithURL:
[NSURL URLWithString:#"http://URL"]];
AFJSONRequestOperation * operation =
[AFJSONRequestOperation JSONRequestOperationWithRequest:request
success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSArray * js = JSON;
[_delegate dati:js];
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString * filePath = [[paths lastObject] stringByAppendingPathComponent:#"downloaded.json"];
NSData * data = [NSJSONSerialization dataWithJSONObject:JSON
options:NSJSONWritingPrettyPrinted
error:NULL];
[data writeToFile:filePath
atomically:YES];
}];
[operation start];
}
and calling this code in View Controller
[[DataManager sharedClass] getJSON];
and it works, but now I need to send (post) some parameters (as an authorization code, GPS coordinates, user's mail or something similar) into the request to the server to receive a specific JSON. Server is already configured and it works fine, but I can't find a guide to modify my code to do that. Does somebody knows how to proceed?

Answer 1

This is an example of posting data to server using JSON, for example the json is below:
NSDictionary *json = #{#"authorization_code": yourAuthorizationCode,#"gps": #{#"lat": latitude,#"lng": longitude},#"email":email};
JSON Posting
Posting on server depends also on your server requirements, so if it requires a JSON to post, this is the way:
//Create an AFHTTPRequestOperationManager
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
//Depending if you need a HTTP header, you create one
[manager.requestSerializer setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
NSString *yourAuthorizationCode;
NSString *latitude;
NSString *longitude;
NSString *email;
//My data to be posted via JSON
NSDictionary *json = #{#"authorization_code": yourAuthorizationCode,#"gps": #{#"lat": latitude,#"lng": longitude},#"email":email};
//Sending Post Method, with parameter JSON
[manager POST:#"http://myphp.com/api/v1/profile" parameters:json success:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSLog(#"JSON: %#", responseObject);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
NSLog(#"Error at creating post: %#", error);
}];
Parameters posted via URL
In this method parameters are passed in URL, and you post them to server in URL form
//Create an AFHTTPRequestOperationManager
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSString *yourAuthorizationCode;
NSString *latitude;
NSString *longitude;
NSString *email;
//Sending Post Method, with parameter JSON (You can change your method of sending data to server just by replacing POST with GET)
[manager POST:[NSString stringWithFormat:#"http://myphp.com/api/v1/profile?authorization_code=%#&gps_lat=%#&gps_lng=%#&email=%#",yourAuthorizationCode,latitude,longitude,email] parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSLog(#"JSON: %#", responseObject);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
NSLog(#"Error at creating post: %#", error);
}];
Hope it helps, give me feedback!