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51 lines
887 B
Go
51 lines
887 B
Go
package update
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import (
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"io"
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"net/http"
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"os"
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log "github.com/sirupsen/logrus"
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)
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var (
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lock chan bool
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)
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// New is a factory function creating a new Handler instance
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func New(updateFn func()) *Handler {
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lock = make(chan bool, 1)
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lock <- true
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return &Handler{
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fn: updateFn,
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Path: "/v1/update",
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}
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}
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// Handler is an API handler used for triggering container update scans
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type Handler struct {
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fn func()
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Path string
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}
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// Handle is the actual http.Handle function doing all the heavy lifting
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func (handle *Handler) Handle(w http.ResponseWriter, r *http.Request) {
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log.Info("Updates triggered by HTTP API request.")
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_, err := io.Copy(os.Stdout, r.Body)
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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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select {
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case chanValue := <-lock:
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defer func() { lock <- chanValue }()
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handle.fn()
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default:
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log.Debug("Skipped. Another update already running.")
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}
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}
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