81 lines
1.5 KiB
Go
81 lines
1.5 KiB
Go
package main
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import (
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"fmt"
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"github.com/imkira/go-observer"
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"net/http"
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"sirlab.de/go/knyc/handler"
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"strconv"
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"time"
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)
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type Value struct {
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value int
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}
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type Engine struct {
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payload observer.Property
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}
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var engine Engine
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func (engine Engine) runEngine() {
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for {
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value := engine.payload.Value().(Value)
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fmt.Printf("sleep: %d\n", value.value)
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time.Sleep(1 * time.Second)
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value.value++
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engine.payload.Update(value)
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}
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}
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func syncFactory(payload observer.Property) func(http.ResponseWriter, *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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refId, err := strconv.Atoi(r.URL.Query().Get("ref"))
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if err != nil {
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refId = -1
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}
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stream := payload.Observe()
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var value Value
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for {
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value = stream.Value().(Value)
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if value.value > refId {
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break
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}
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select {
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case <-stream.Changes():
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stream.Next()
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}
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}
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w.Header().Add("Content-Type", "text/plain")
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fmt.Fprintf(w, "%d (%d)\n", value.value, refId)
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}
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}
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func main() {
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app := handler.NewAuthMux()
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http.Handle("/", app)
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app.PublicHandleFunc("/__intern__/exit", handler.Exit)
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payload := observer.NewProperty(Value{value: 19})
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sync := syncFactory(payload)
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app.PublicHandleFunc("/sync", sync)
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// hanlde login page
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fsHandler := http.FileServer(http.Dir("../client/dist/"))
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// default handler
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app.PublicHandle("/", fsHandler)
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engine.payload = payload
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go engine.runEngine()
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// start listening
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fmt.Println("http://localhost:32039")
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http.ListenAndServe(":32039", nil)
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}
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