Swift: URLRequest uses body as JSON key - swift

Question

I'm using a generic function for POST requests in my app. I have the following function:
func PostRequest<In:Codable>(object: In, endpoint: String){
do{
let url = URL(string: "http://localhost:8080/\(endpoint)/")
var request = URLRequest(url: url!)
request.httpMethod = "POST"
request.httpBody = try JSONEncoder().encode(object)
URLSession.shared.dataTask(with: request) {data, response, error in
guard let data = data, error == nil else{
print(error?.localizedDescription ?? "No Data")
return
}
let JSONResponse = try? JSONSerialization.jsonObject(with: data, options: [])
if let JSONResponse = JSONResponse as? [String: Any] {
print(JSONResponse)
}
}.resume()
}catch{
print(error)
}
}
And in this case, the object is the following struct:
struct MarkAsDelivered: Codable{
let whoCollected: String
let deliveryID: Int
}
When I print the result of JSONEncoder().encode(object) as a string, it returns the following, as would be expected:
{
"whoCollected":"TESTNAME",
"deliveryID":140
}
however, when i view this JSON object on my backend, it returns it as the following:
{
"{\"whoCollected\":\"TESTNAME\",\"deliveryID\":140}" : ""
}
From what I can tell, it is using the JSON object as a key.
Does anyone know what has caused this issue. Any assistance would be greatly appreciated.

Answer 1

as #burnsi mentioned in the comments to my question, I was indeed missing the content type. Specifying it fixed my issue:
func PostRequest<In:Codable>(object: In, endpoint: String){
do{
let url = URL(string: "http://localhost:8080/\(endpoint)/")
var request = URLRequest(url: url!)
request.httpMethod = "POST"
//Added content type on line below:
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.httpBody = try JSONEncoder().encode(object)
URLSession.shared.dataTask(with: request) {data, response, error in
guard let data = data, error == nil else{
print(error?.localizedDescription ?? "No Data")
return
}
let JSONResponse = try? JSONSerialization.jsonObject(with: data, options: [])
if let JSONResponse = JSONResponse as? [String: Any] {
print(JSONResponse)
}
}.resume()
}catch{
print(error)
}
}