POST request only json string

[sergvax]

As I understand - POST request only possible with json string -
is it true?

Can you make POST request with any string(example - dataForm)?
Can you give example how to make POST request?

Can you explain this part of swift code -
if (method.rawValue == "POST" || method.rawValue == "PUT"){
request.httpBody = try? JSONSerialization.data(withJSONObject: params, options: [])

[WyattMufson]

The request object for POST is expecting a Data type (see here). NetworkUtills is a wrapper built around the Foundation URL Loading System to make it easier to pass in data. NetworkUtils is expecting a JSON style object ([String: Any]) to be passed in.

If you take a look at this line you will see the arguments it's expecting.

Here is an example of how to use it:

let jsonDict: [String: Any] = ["key1": "val1", "key2": 2]
networkUtils.post("https://www.myapi.com/endpoint", jsonDict).then { (data) in
  // Data response from server
}.catch { (error) in
  // Error response
}