iOS/IBM 云/swift : Post to Watson API using AlamoFire

Question

我正在尝试使用 AlamoFire 和以下代码发布到 Watson 音调分析器 API。它不断收到 401 错误，这显然意味着授权失败。然而，相同的用户 ID/密码信息可以通过 curl 请求找到。所以问题似乎不在于用户 ID/密码，而在于我如何形成 AlamoFire 请求。

 func postToWatson () {
        print("post to watson called")
        let url: String =  "https://gateway.watsonplatform.net/tone-analyzer/api/v3/tone?version=2016-05-19"
        let message = "All you need is love"
        var parameters = [
           "username":"my-lengthy-username",
            "password":"my-ugly-password"]
        parameters["text"] = message
        Alamofire.request(url, parameters: parameters)
            .responseJSON { response in
                print(response.request)
                print(response.response)
                print(response.result)
        }
    }

以下是我通过上述打印命令从 API 返回的内容:

Optional(https://gateway.watsonplatform.net/tone-analyzer/api/v3/tone?version=2016-05-19&password=xxxxxx&text=All%20you%20need%20is%20love&username=xxxxxxxxxxxx)
Optional(<NSHTTPURLResponse: 0x1740396a0> { URL: https://gateway.watsonplatform.net/tone-analyzer/api/v3/tone?version=2016-05-19&password=xxxxxx&text=All%20you%20need%20is%20love&username=xxxxxxxxxxxx } { status code: 401, headers {
    Connection = close;
    "Content-Encoding" = gzip;
    Date = "Wed, 30 May 2018 17:23:30 GMT";
    "Strict-Transport-Security" = "max-age=31536000;";
    "Www-Authenticate" = "Basic realm=\"IBM Watson Gateway(Log-in)\"";
    "X-Backside-Transport" = "OK OK,FAIL FAIL";
    "X-DP-Transit-ID" = "gateway02-1020566241";
    "X-DP-Watson-Tran-ID" = "gateway02-1020566241";
    "X-Global-Transaction-ID" = ffea405d5b0ede123cd49ae1;
    "x-dp-local-file" = true;
} })
SUCCESS

上面的代码有什么问题？

Answer 1

我没用过 AlamoFire，但看看他们的 documentation for making a request the authentication处理方式与您的代码不同。

用户名/密码不是常规参数，但您需要将它们作为身份验证 header 传递。文档有相应的示例。这可以解释 401，因为没有身份验证传递给 Watson。

未经测试，但像这样的东西应该可以工作:

 Alamofire.request(url)
    .authenticate(user: username, password: password)
    .responseJSON { response in
                print(response.request)
                print(response.response)
                print(response.result)
}