ios – unable to ship put up request utilizing urlrequest

I am simply making an attempt to ship easy variable to server utilizing put up request and I wish to do it manually.
Right here is my code

   guard let url = URL(string: urlString+"/someapi") else {
        return
    }
    var request = URLRequest(url: url)
    request.httpMethod = "POST"
    request.setValue(String(3), forHTTPHeaderField:"Content material-Size")
    request.setValue("software/x-www-form-urlencoded", forHTTPHeaderField: "Content material-Sort")
    request.setValue("textual content/plain", forHTTPHeaderField: "Settle for")
    var httpBody:Information=Information()
    httpBody.append(contentsOf: "f=1".knowledge(utilizing: .utf8)!) //f is essential & 1 worth
    request.httpBody = httpBody
    let onComplete = {
        (knowledge:Information?,urlresponse:URLResponse?,error:Error?)->Void in
        //do nothing
        if let _ = error {
            print("Error occured")
        }
    }
    let process = session.dataTask(with: url, completionHandler: onComplete)
    process.resume()

I am utilizing flask server to check this out. On flask aspect I analysed the request right here is the it is header content material

Settle for: */*
Settle for-Language: en-US,en;q=0.9
Connection: keep-alive
Settle for-Encoding: gzip, deflate
Consumer-Agent: Findpercent20Doctor/1 CFNetwork/1333.0.4 Darwin/21.4.0

And in addition flask server is receiving GET request as an alternative of POST and in addition variables will not be exhibiting in server.