swift - http Post 说它可以工作，但它没有在本地主机上发布

Question

我一直在尝试使用 swift 为移动应用程序向我的本地主机发送 HTTP 帖子，它打印 Result -> Optional(["user": larry])这应该意味着它可以工作，但它没有在我的本地主机上发布任何内容。我的代码是:

func ReqUsers() -> Void {

        let json = ["user":"larry"]

        do {

            let jsonData = try JSONSerialization.data(withJSONObject: json, options: .prettyPrinted)

            let url = NSURL(string: "http://192.168.1.318:8080")! /*localhost*/
            let request = NSMutableURLRequest(url: url as URL)
            request.httpMethod = "POST"

            request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
            request.httpBody = jsonData

            let task = URLSession.shared.dataTask(with: request as URLRequest){ data, response, error in
                if error != nil{
                    print("Error -> \(String(describing: error))")
                    return
                }
                do {
                    let result = try JSONSerialization.jsonObject(with: /*data!*/ request.httpBody!, options: .allowFragments) as? [String:AnyObject]
                    print("Result -> \(String(describing: result))")
                    
                } catch {
                    print(response!)
                    print("Error -> \(error)")
                    print("that")
                }
            }

            task.resume()
        } catch {
            print(error)
            print("this")
        }
        print("called")
    }

谢谢你的时间
有关后端的更多信息，它是用 goLang 编写的，代码如下:

package main

import (
    "fmt"
    //"os"
    //"io/ioutil"
    //"log"
    "net/http"
)


func main() {
    http.HandleFunc("/", HelloServer)
    http.ListenAndServe(":8080", nil)
   
}

func HelloServer(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello")
}

Answer 1

如果您在服务器中没有看到日志，可能是由 URLSession 引起的的缓存策略。
尝试设置 cachePolicy您的属性(property)URLRequest至 .reloadIgnoringLocalAndRemoteCacheData或 .reloadIgnoringCacheData看看是否有效:

let url = URL(string: "http://192.168.1.318:8080")! /*localhost*/
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData
request.cachePolicy = .reloadIgnoringLocalAndRemoteCacheData
// or
request.cachePolicy = .reloadIgnoringCacheData