Swfit 4 JSON adding custom header - json

Question

How can I add custom header while sending GET request on server.
I have tried
var request = URLRequest(url: URL(string: URL)!)
request.httpMethod = "GET"
// request.addValue("2", forHTTPHeaderField: "x-api-version")
request.addValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
request.addValue("application/json", forHTTPHeaderField: "Accept")
P.S I am beginner so if there is any mistake please point it out and help me to improve. Thank you in advance.

Answer 1

If your purpose is to authenticate to the API using a token, you set the wrong format for the Authorization header. Token authorization is also called "bearer authorization", the format is below:
let url = URL(string: "https://httpbin.org/get")!
let token = "abcdef"
var request = URLRequest(url: url)
request.httpMethod = "GET"
request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
URLSession.shared.dataTask(with: request) { data, response, error in
guard error == nil else { print(error!); return }
guard let data = data else { print("No data"); return }
if let str = String(data: data, encoding: .utf8) {
print(str)
}
}.resume()
You don't need the Content-Type header since a GET request has no body content.

Answer 2

Try below code:
func setHeader() -> [String : String] {
let dictionary = [
"Accept":"application/json",
"Content-Type":"application/json",
"Authorization": "your_authtoken"
// more headers here
]
return dictionary
}
// calling
request(endPoint, method: .post, parameters: params, encoding:JSONEncoding.default, headers: setHeader())