77 lines
1.4 KiB
Go
Executable File
77 lines
1.4 KiB
Go
Executable File
package main
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import (
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"time"
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"github.com/gorilla/websocket"
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)
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func homePage(w http.ResponseWriter, r *http.Request) {
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b, _ := ioutil.ReadFile("./index.html")
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fmt.Fprintf(w, "%s", b)
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}
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func setupRoutes() {
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http.HandleFunc("/", homePage)
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http.HandleFunc("/ws", wsEndpoint)
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}
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func main() {
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fmt.Println("Hello World")
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setupRoutes()
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log.Fatal(http.ListenAndServe(":8080", nil))
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}
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var upgrader = websocket.Upgrader{
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ReadBufferSize: 1024,
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WriteBufferSize: 1024,
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}
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func reader(conn *websocket.Conn) {
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for {
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// read in a message
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messageType, p, err := conn.ReadMessage()
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if err != nil {
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log.Println(err)
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return
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}
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// print out that message for clarity
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fmt.Println(string(p))
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if err := conn.WriteMessage(messageType, p); err != nil {
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log.Println(err)
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return
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}
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}
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}
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func wsEndpoint(w http.ResponseWriter, r *http.Request) {
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upgrader.CheckOrigin = func(r *http.Request) bool { return true }
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// upgrade this connection to a WebSocket
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// connection
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ws, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Println(err)
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}
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log.Println("Client Connected")
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// listen indefinitely for new messages coming
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// through on our WebSocket connection
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go reader(ws)
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for {
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log.Println("writing...")
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err = ws.WriteMessage(1, []byte("Hi Client!"))
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log.Println("written")
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if err != nil {
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log.Println(err)
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return
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}
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time.Sleep(time.Second)
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}
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}
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