88 lines
1.5 KiB
Go
88 lines
1.5 KiB
Go
package main
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import (
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"fmt"
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"log"
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"net/http"
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"time"
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"github.com/danclive/snap7-go"
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"github.com/gapidobri/siemens-ws/hardware"
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"github.com/gorilla/websocket"
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)
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var (
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upgrader = websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool {
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return true
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},
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}
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clients = []chan uint16{}
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)
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func main() {
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siemens, err := snap7.ConnentTo("192.168.117.222", 0, 1, 0)
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if err != nil {
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fmt.Println(err)
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}
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// client := hardware.NewClient(hardware.NewMock())
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client := hardware.NewSiemens(siemens)
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go func() {
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for {
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val, err := client.Read()
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if err != nil {
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log.Println("read err:", err)
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}
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fmt.Println(val)
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for _, c := range clients {
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c <- val
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}
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time.Sleep(time.Millisecond * 100)
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}
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}()
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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fmt.Println("open handler")
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c, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Println("upgrade err:", err)
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return
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}
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defer c.Close()
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dataCh := make(chan uint16)
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clients = append(clients, dataCh)
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for {
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val, more := <-dataCh
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if !more {
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break
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}
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err = c.WriteMessage(websocket.TextMessage, []byte(fmt.Sprintf("%d", val)))
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if err != nil {
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log.Println("write err:", err)
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fmt.Println("close handler")
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c.Close()
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close(dataCh)
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for i, c := range clients {
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if c == dataCh {
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clients = append(clients[:i], clients[i+1:]...)
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break
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}
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}
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}
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}
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})
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log.Fatal(http.ListenAndServe(":1234", nil))
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}
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