Creating a Post Request in iOS - ios

Question

To begin with, I have looked up how to make a post request and have read multiple thread and docs about how to create one, however my data doesn't seem to be working.
I have two fields say x and html that i want to make to the call callname.
The GET form of this would be www.someserver.com/callname?x=something&y=something
Here is what my POST code looks like so far:
NSString *baseURLString = #"http://www.someserver.com/callname"
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[[NSURL URLWithString:baseURLString] standardizedURL]];
NSString *fields = [NSString stringWIthFormat:#"x=%#&html=%#",x,htmlSource];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/x-www-form-urlencoded; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:[NSData dataWithBytes:[fields UTF8String] length:strlen([fields UTF8String])]];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
The NSURLConnection Delegate Methods implemented as such
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
NSLog(#"Data Received");
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
NSLog(#"Error: %#" , error);
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSLog(#"Connection Finished");
}
Did i miss something? My code looks pretty identical to most of the examples I found aside from the choice of encoding. Does it matter that I am passing in html source code as the value of y? Any tips or hints will be appreciated. I am very new to iOS and html handling in general so excuse my lack of knowledge on the subject. Thanks for your time!

Answer 1

You must implement the delegate protocol for NSURLConnection to get the response. You haven't posted any of that code, so I would assume this means you didn't implement the relevant methods.

Answer 2

One potential issue is that you missed to properly percent encode the parameters:
When using parameters like in your code with a content type application/x-www-form-urlencoded, I would suggest to create your parameters as (unencoded) NSString key/value pairs, create a NSDictionary object and use the following helper method described in the answer here (How to send multiple parameterts to PHP server in HTTP post) which creates a properly encoded parameter string which you can add to the body.

Answer 3

I believe your form URL encoded is not correct. I believe the solution is the following
[serviceRequest setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
If you want to UTF-8 encode your values, you need to do it before, like for example,
NSString *postLength = [NSString stringWithFormat:#"%d", [_xmlDoc length]]; //Calculating the Content Length
NSData *postData = [_xmlDoc dataUsingEncoding:NSUTF8StringEncoding]; // preparing XML to be sent in POST
Notice you encode the string of POST data ahead of time.
Hope that this helps!!

Answer 4

class Requests {
class func loginRequest(userName:String, password:String, completion: #escaping ((JSON?, String?) -> ()) )
{
var request = URLRequest(url: URL(string: "your URL")!)
request.httpMethod = "POST"
//parameters
let postString = "user_login=\(userName)&user_pass=\(password)"
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) {
data, response, error in guard error == nil else {
print(error!)
completion(nil, error!.localizedDescription)
return
}
guard let data = data else {
completion(nil, "location not found")
return
}
let jsonData = JSON(data)
completion(jsonData, nil)
}
task.resume()
}
}

Answer 5

Your code works for me. Did you remember to run [connection start]; ?