我正在尝试与用 Go 和 JavaScript 前端编写的服务器建立 websocket 连接。我在一个目录中有以下文件：main.go 索引.html**这是我的 Go 代码main.go：**package mainimport ( "fmt" "log" "net/http" "github.com/gorilla/websocket")var upgrader = websocket.Upgrader{ ReadBufferSize: 1024, WriteBufferSize: 1024,}func homePage(w http.ResponseWriter, r *http.Request) { http.ServeFile(w, r, "./index.html") conn, err := upgrader.Upgrade(w, r, nil) if err != nil { log.Println("Error in handler:", err) return } log.Println("Client connected.") for { messageType, p, err := conn.ReadMessage() if err != nil { log.Println("Fehler in ReadMessage: ", err) return } log.Println(string(p)) //echo message to client if err := conn.WriteMessage(messageType, p); err != nil { log.Println(err) return } }}func setupRoutes() { http.HandleFunc("/ws", homePage)}func main() { fmt.Println("Server gestartet") setupRoutes() log.Fatal(http.ListenAndServe(":9100", nil))}这是 index.html 中的 HTML 和 JavaScript：<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title>Some unimportant html </title></head><body> <script> let socket = new WebSocket("ws://localhost:9100/ws"); console.log("Websocket started."); socket.onOpen = () => { console.log("Client started."); } socket.onclose = (event) => { console.log("Socket closed: ", event); } socket.onError = (error) => { console.log("Socket Error: ", error); } socket.onMessage = (msg) => { console.log(msg); } </script></body></html>
1 回答
胡子哥哥
TA贡献1825条经验 获得超6个赞
我得以修复它。问题是我需要一个端点用于索引文件，另一个端点用于 websocket。所以我将相关部分更改为：
func websocketHandler(w http.ResponseWriter, r *http.Request) {
conn, err := upgrader.Upgrade(w, r, nil) //conn is a websocket connection (aus http wird websocket protokoll)
if err != nil {
log.Println("Error in handler:", err)
return
}
log.Println("Client connected.")
for {
messageType, p, err := conn.ReadMessage()
if err != nil {
log.Println("Fehler in ReadMessage: ", err)
return
}
log.Println(string(p))
//echo message to client
if err := conn.WriteMessage(messageType, p); err != nil {
log.Println(err)
return
}
}
}
func homePage(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, "./index.html")
}
func setupRoutes() {
http.HandleFunc("/", homePage)
http.HandleFunc("/ws", websocketHandler)
}
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