39 lines
627 B
Go
39 lines
627 B
Go
package handler
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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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"strconv"
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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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func SyncFactory(obs observer.Property) HandlerFunc {
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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 := obs.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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