Chrome继续为SSE发送GET

Question

浏览器(Chrome)为什么总是为SSE (服务器发送的事件)发送GET请求？知道为什么吗？

我只通过单击页面上的按钮运行下面的“”函数。

据我所知，SSE只发送了一个GET，接收到了一个200 OK。然后，通过更改，服务器只推送“数据：.”通过保持打开的TCP HTTP/HTTPS连接。

const state = ['connecting', 'open', 'closed'];
let EPEvent;
function subscribeMe() {
  EPEvent = new EventSource(`/event/${window.sessionStorage.getItem("Token")}/EPRegistration`);
  EPEvent.onmessage = function (e) { console.log(state[this.readyState]); console.log(e); console.log(JSON.parse(e.data)) }
  EPEvent.onopen = function () { console.log(state[this.readyState]) }
}

GET /event/MTSE-960a8337-1f95-495c-a313-92659ba8ba5d/EPRegistration HTTP/1.1
Host: 192.168.1.2
Connection: keep-alive
Accept: text/event-stream
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Referer: http://192.168.1.2/manage
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8

HTTP/1.1 200 OK
Connection: keep-alive
Content-Type: text/event-stream
Cache-Control: no-cache
Date: Sun, 08 Mar 2020 21:07:45 GMT
Server: Home SE
Content-Length: 14

data: null

GET /event/MTSE-960a8337-1f95-495c-a313-92659ba8ba5d/EPRegistration HTTP/1.1
Host: 192.168.1.2
Connection: keep-alive
Accept: text/event-stream
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Referer: http://192.168.1.2/manage
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8

HTTP/1.1 200 OK
Cache-Control: no-cache
Connection: keep-alive
Content-Type: text/event-stream
Date: Sun, 08 Mar 2020 21:07:48 GMT
Server: Home SE
Content-Length: 14

data: null

GET /event/MTSE-960a8337-1f95-495c-a313-92659ba8ba5d/EPRegistration HTTP/1.1
Host: 192.168.1.2
Connection: keep-alive
Accept: text/event-stream
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Referer: http://192.168.1.2/manage
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8

HTTP/1.1 200 OK
Cache-Control: no-cache
Connection: keep-alive
Content-Type: text/event-stream
Date: Sun, 08 Mar 2020 21:07:51 GMT
Server: Home SE
Content-Length: 14

data: null

GET /event/MTSE-960a8337-1f95-495c-a313-92659ba8ba5d/EPRegistration HTTP/1.1
Host: 192.168.1.2
Connection: keep-alive
Accept: text/event-stream
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Referer: http://192.168.1.2/manage
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8

HTTP/1.1 200 OK
Cache-Control: no-cache
Connection: keep-alive
Content-Type: text/event-stream
Date: Sun, 08 Mar 2020 21:07:54 GMT
Server: Home SE
Content-Length: 14

data: null

GET /event/MTSE-960a8337-1f95-495c-a313-92659ba8ba5d/EPRegistration HTTP/1.1
Host: 192.168.1.2
Connection: keep-alive
Accept: text/event-stream
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Referer: http://192.168.1.2/manage
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8

HTTP/1.1 200 OK
Cache-Control: no-cache
Connection: keep-alive
Content-Type: text/event-stream
Date: Sun, 08 Mar 2020 21:07:57 GMT
Server: Home SE
Content-Length: 14

data: null

GET /event/MTSE-960a8337-1f95-495c-a313-92659ba8ba5d/EPRegistration HTTP/1.1
Host: 192.168.1.2
Connection: keep-alive
Accept: text/event-stream
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Referer: http://192.168.1.2/manage
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8

HTTP/1.1 200 OK
Cache-Control: no-cache
Connection: keep-alive
Content-Type: text/event-stream
Date: Sun, 08 Mar 2020 21:08:00 GMT
Server: Home SE
Content-Length: 14

data: null

Answer 1

修好了！

我不应该在我的答复中加上“内容长度”！这是一条流，内容长度没有意义.

现在，它运转良好。