Encode '+' using URLComponents in Swift

Question

This is how I add query params to a base URL:

let baseURL: URL = ...
let queryParams: [AnyHashable: Any] = ...
var components = URLComponents(url: baseURL, r         


        

Answer 1

Can you try using addingPercentEncoding(withAllowedCharacters: .alphanumerics)?

I just put together a quick playground demonstrating how this works:

//: Playground - noun: a place where people can play

let baseURL: URL = URL(string: "http://example.com")!
let queryParams: [AnyHashable: Any] = ["test": 20, "test2": "+thirty"]
var components = URLComponents(url: baseURL, resolvingAgainstBaseURL: false)

var escapedComponents = [String: String]()
for item in queryParams {
    let key = item.key as! String
    let paramString = "\(item.value)"

    // percent-encode any non-alphanumeric character.  This is NOT something you typically need to do.  User discretion advised.
    let escaped = paramString.addingPercentEncoding(withAllowedCharacters: .alphanumerics)

    print("escaped: \(escaped)")

    // add the newly escaped components to our dictionary
    escapedComponents[key] = escaped
}


components?.queryItems = escapedComponents.map { URLQueryItem(name: ($0), value: "\($1)") }
let finalURL = components?.url