在python中将会话令牌转换为swift缺少什么？

Question

这是我使用python中的令牌访问http请求的方式，该方法没有问题。

    import requests
    import ast
    session = requests.Session()
    session.cookies.set('auth_token', args.token)
    if not session.put("https://SomeWebAddress/audio/devices/1/volume", data=str(volume)).status_code == 200
          print("Error during sending the command")

在Swift 4.2，iOS 13.0中，我正在尝试

let url:URL = URL(string: "https://SomeWebAddress/audio/devices/1/volume")!
let session:URLSession = URLSession.shared
session.configuration.httpShouldSetCookies = true
var request:URLRequest = URLRequest(url: url)
request.httpShouldHandleCookies = true
request.setValue(TOKEN, forHTTPHeaderField: "Authorization")
request.httpMethod = "POST"

request.httpBody = String(volume).data

以及

 request.httpBody = String(volume) as Data

但最终会出现类似错误

无法强制将'String'类型的值转换为'Data'类型

我在做什么错？

Answer 1

我建议对Double使用这样的解决方案

request.httpBody = String(volume).data(using: .utf8)

音量转换为Data就这样