I am trying to figure out how to properly percent encode forward slashes in URL query items. If i use URLComponents with URLQueryItem, they do automatically escape a bunch of characters, e.g. "=" and "%". However, "/" is not escaped. But because "%" is escaped, manually escaping "/" means it will be escaped twice, resulting in "%252F".
As a workaround i have created a URL manually from a string with manually excaped URL parameters. But i feel like this should be possible with the proper APIs. Am i missing something?
Example code
var baseURLString = "https://www.foobar.com"
var baseURL = URL(string: baseURLString)!
var userID = "abc/def=="
var encodedUserID = userID.addingPercentEncoding(withAllowedCharacters: .alphanumerics)
var queryItem = URLQueryItem(name: "userID", value: userID)
var encodedQueryItem = URLQueryItem(name: "encodedUserID", value: encodedUserID)
var urlComponents = URLComponents(url: baseURL, resolvingAgainstBaseURL: false)!
urlComponents.queryItems = [queryItem, encodedQueryItem]
Output
https://www.foobar.com?userID=abc/def%3D%3D&encodedUserID=abc%252Fdef%253D%253D
cargath
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