ios - Swift 在 GET 参数中编码 &

Question

我有一个简单的 GET 登录请求。用户名是Silver，密码是MOto&@10
我正在使用 SwiftHttp处理请求的框架。在点击登录请求时，我总是收到错误的响应。
但是，在浏览器上点击登录请求 url(用服务器替换实际域)时，我明白了:
https://server/api/check-access/by-login-pass?_key=wlyOF7TM8Y3tn19KUdlq&login=silver&pass=MOto%26@10

密码中的 & 编码有问题。尽管我已将其替换为百分比编码。这是我的代码:

do {               
   let passwordString = self.convertSpecialCharacters(string: password.text!)
   print("%@", passwordString)
   let opt = try HTTP.GET(Constants.kLoginUrl, parameters: ["login": username.text!, "pass": passwordString])
   opt.start { response in
             if let err = response.error {
                 print("error: \(err.localizedDescription)")
                 return
             }

             print("opt finished: \(response.description)")
             self.parseLoginResponse(response.data)
}
} catch _ as NSError {

}  

这是convertSpecialCharacters:

func convertSpecialCharacters(string: String) -> String {
        var newString = string

        let arrayEncode = ["&", "<", ">", "\"", "'", "-", "..."]

        for (escaped_char) in arrayEncode {
            newString = newString.encode(escaped_char)
        }

        return newString
    } 

编码扩展:

extension String {
        func encode(_ chars: String) -> String
        {
            let forbidden = CharacterSet(charactersIn: chars)
            return self.addingPercentEncoding(withAllowedCharacters: forbidden.inverted) ?? self
        }
    }

Answer 1

一种合适的方法是使用处理所有百分比编码的 URLComponents:

var urlComponents = URLComponents(string: "https://server/api/check-access/by-login-pass")!
let queryItems = [URLQueryItem(name:"_key", value:"wlyOF7TM8Y3tn19KUdlq"),
                  URLQueryItem(name:"login", value:"silver"),
                  URLQueryItem(name:"pass", value:"MOto&@10")]
urlComponents.queryItems = queryItems
let url = urlComponents.url

print(url) // "https://server/api/check-access/by-login-pass?_key=wlyOF7TM8Y3tn19KUdlq&login=silver&pass=MOto%26@10"

PS:我完全同意luk2302的评论。