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我正在从我的移动应用程序（iOS-Swift 4）向安装在 ESP8266 上的 Simple Http Server（Micropython）和 PC 上的 BaseHTTPServer（Python）发送相同的帖子。

在 PC 上，我成功获取有效负载，如下所示，但是，当我发布到 ESP8266 时，我在正文中看不到任何有效负载，并且在 3-5 次请求后，我收到以下错误；您可以在下面看到 ESP8266 中的代码和 Swift 中的请求方法；（如果我在 Swift 中从我的请求中删除 JSON 数据，我不会收到以下错误，只有标头已成功发布到 ESP8266）

3-5 Post Request 后 SWIFT 出现错误；

2018-02-06 15:58:48.381801+0300 Chroma[1655:40174] TIC TCP Conn Failed [49:0x60400016c6c0]: 1:61 Err(61)
2018-02-06 15:58:48.385161+0300 Chroma[1655:40174] Task <542713C7-815D-479B-A462-DBD6A6EBB795>.<49> HTTP load failed (error code: -1004 [1:61])
2018-02-06 15:58:48.386808+0300 Chroma[1655:40159] Task <542713C7-815D-479B-A462-DBD6A6EBB795>.<49> finished with error - code: -1004
Could not connect to the server.

PC-调试（成功）；

----- Request Start ----->
Request path: /
Content Length: 20
Request headers: Host: 0.0.0.0:10000
Content-Type: application/x-www-form-urlencoded
Connection: keep-alive
Accept: application/json
User-Agent: Chroma
Accept-Language: 
Content-Length: 20
Accept-Encoding: gzip, deflate
Request payload: {"COLOR":[0,255,95]}
<----- Request End -----

ESP8266-DEBUG（未看到有效负载）；

POST / HTTP/1.1
Host: 192.168.1.171:8080
Content-Type: application/x-www-form-urlencoded
Connection: keep-alive
Accept: application/json
User-Agent: Chroma
Accept-Language: 
Content-Length: 20
Accept-Encoding: gzip, deflate

ESP8266 上的代码

def webServer():  
    s = socket.socket()
    ai = socket.getaddrinfo("192.168.1.171", 8080)
    print("Bind address info:", ai)
    addr = ai[0][-1]
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s.bind(addr)
    s.listen(2)
    while True:
        res = s.accept()
        client_sock = res[0]
        client_addr = res[1]
        # print("Client address:", client_addr)
        # print("Client socket:", client_sock)

        req = client_sock.recv(1024)
        print("Request: %s" % req.decode())

        client_sock.send("HTTP/1.0 200 OK\r\n\r\n'Color: JSON'\r\n")

        client_sock.close()
        print()

快速请求代码

func sendPostToServer(color: [Int]) {
  var json = [String(): [Int()]]
  json = ["COLOR": color]

  let jsonData = try? JSONSerialization.data(withJSONObject: json)

  // create post request
  let url = URL(string: "http://192.168.1.171:8080")!
  // let url = URL(string: "http://0.0.0.0:10000")! //to pc server

  var request = URLRequest(url: url)

  request.httpMethod = "POST"
  request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
  request.setValue("application/json", forHTTPHeaderField: "Accept")
  request.setValue("", forHTTPHeaderField: "Accept-Language")
  request.setValue("Chroma", forHTTPHeaderField: "User-Agent")

  // insert json data to the request
  request.httpBody = jsonData

  let task = URLSession.shared.dataTask(with: request) { data, response, error in
      guard let data = data, error == nil else {
          print(error?.localizedDescription ?? "No data")
          return
      }
      let dataString = String(data: data, encoding: .utf8) ?? ""
      print("Response \(dataString)")
  }
  task.resume()
}
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