Can't set headers on my WKWebView POST request

Question

I want to do a POST request to my WKWebView but the headers doesn\'t get set when I monitor the requests with Charles so the request fails. What is wrong here?<

Answer 1

As the OP stated, I have also confirmed in Charles that the body is 0 bytes after webView.load(request).

There's a workaround for this WKWebView bug, we will initiate a POST request using URLSession convert the data returned by the server to String and instead of loading the url we will use loadHTMLString which will:

Set the webpage contents and base URL.

and the content is our converted string:

var request = URLRequest(url: URL(string: "http://www.yourWebsite")!)
request.httpMethod = "POST"
let params = "do=something&andAgain=something"
request.httpBody = params.data(using: .utf8)

let task = URLSession.shared.dataTask(with: request) { (data : Data?, response : URLResponse?, error : Error?) in
        if data != nil {
            if let returnString = String(data: data!, encoding: .utf8) {
                self.webView.loadHTMLString(returnString, baseURL: URL(string: "http://www.yourWebsite.com")!)
            }
        }
}
task.resume()