我有一个简单的Node Express端点,可以用curl成功击中它:
curl --header "Content-Type: application/json" \
--request POST \
--data '{"lat":33.485834000000001,"long":-100.106417}' \
http://192.168.99.100:49160/login
{"status":200,"data":{"userId":"bff37d9c-25a9-421b-aa58-eba0fef0da03"},"message":null}
但是,当我尝试击中相同的端点但在Swift 4中使用以下命令时:
let task = URLSession.shared.dataTask(with: urlRequest) { data, response, error in
guard let serverData = data, error == nil else {
handler(ResponseBuilder().set(error: ErrorType.network).build())
return
}
// Process data.
}
task.resume()
URLSession返回给我的“数据”中没有任何内容。我希望这些数据包含与上面返回的curl相同的值。
“响应”的填充符合我的预期:
Optional<NSURLResponse>
- some : <NSHTTPURLResponse: 0x600000a1a5a0> { URL: http://192.168.99.100:49160/login } { Status Code: 200, Headers {
Connection = (
"keep-alive"
);
"Content-Length" = (
86
);
"Content-Type" = (
"application/json; charset=utf-8"
);
Date = (
"Thu, 25 Oct 2018 05:51:39 GMT"
);
Etag = (
"W/\"56-8ZCdAcNDopMfakzfNDEniZ0fgoc\""
);
"X-Powered-By" = (
Express
);
} }
“错误”为零,我正在服务器上登录以表明它已被命中,但数据仍然为空。
我正在使用模拟器运行iOS应用。
我在这里缺少明显的东西吗?
更新1
回答以下一些问题。如下创建“ urlRequest”:
var urlRequest = URLRequest(url: request.url)
urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
urlRequest.addValue("application/json", forHTTPHeaderField: "Accept")
urlRequest.httpMethod = "POST"
urlRequest.httpBody = try? JSONSerialization.data(withJSONObject: request.data, options: .prettyPrinted)
其中“请求”只是我使用的包装对象,其内容为:
Request
▿ url : http://192.168.99.100:49160/login
- _url : http://192.168.99.100:49160/login
▿ data : 2 elements
▿ 0 : 2 elements
- key : "lat"
- value : 33.485834000000001
▿ 1 : 2 elements
- key : "long"
- value : -100.106417
更新3
有人建议我安装了Charles Proxy。结果如下:
请求:
{
"lat" : 33.485834000000001,
"long" : -100.106417
}
响应:
{"status":200,"data":{"userId":"3d559555-c0ad-4e3a-a10b-3e267ee7f662"},"message":null}
答案 0 :(得分:0)
不幸的答案是,在这种情况下,xcode调试器可能不可靠(URLSession上下文中的完成处理程序)-它始终显示数据为0字节。
使用以下任一方法打印数据:
let received = String(data: data!, encoding: String.Encoding.utf8)
print("\(received)")
或
let resultObject = try JSONSerialization.jsonObject(with: data!, options: [.allowFragments,])
print("\(resultObject)")
尽量避免过分摇头而伤脖子...