URLSession sends GET request instead of POST - ios

Question

That's how I'm doing a POST request
var request = URLRequest(url: url)
let methodString = mehtod.rawValue
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.cachePolicy = .reloadIgnoringLocalAndRemoteCacheData
if let headers = headers {
request.set(headers: headers)
}
if let parameters = parameters {
do {
let postParams = try JSONEncoder().encode(parameters)
let postData = postParams
request.httpBody = postData
}
catch {
print("error")
}
}
let session = URLSession.shared
print(request)
print(request.allHTTPHeaderFields)
print(String(data: request.httpBody!, encoding: .utf8)!)
print(request.httpMethod)
session.dataTask(with: request) { (data, response, error) in
let result: Result<Data>
if let data = data {
result = .success(data)
}
else if let error = error {
result = .failure(error)
}
else {
result = .failure(RESTError.unknownError)
}
completion(result)
}.resume()
And this is what I see in Charles
I'm trying to send POST but somehow I'm sending GET request.
Also I'm getting error from the server:
{"message":"Method \"GET\" not allowed.","code":"method_not_allowed"}
What can be the reason?

Answer 1

I had the same issue. When redirect occurs iOS makes new request and change POST to GET. Also your body became empty.
Double check if you're by accident using http instead https.
You can also implement
(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task willPerformHTTPRedirection:(NSHTTPURLResponse *)redirectResponse newRequest:(NSURLRequest *)request completionHandler:(void (^)(NSURLRequest *))completionHandler
but for me that wasn't solution.
Here is more details
https://developer.apple.com/forums/thread/12749?answerId=34834022#34834022

Answer 2

I think you can use session.uploadTask(with: request, from: uploadData).

Answer 3

you need to create your post string as dictionary than convert it to jason string.
if you have problem converting your data to jason tell me i ill give you a method for it.
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
let paramString = yourPostDataInJASON!
print(paramString)
request.httpBody = paramString.data(using: String.Encoding.utf8)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")