mirror of https://github.com/jlelse/GoBlog
93 lines
1.7 KiB
Go
93 lines
1.7 KiB
Go
package main
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import (
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"context"
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"github.com/go-chi/chi"
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"github.com/go-chi/chi/middleware"
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"log"
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"net/http"
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"os"
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"os/signal"
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"strconv"
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"sync"
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"syscall"
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"time"
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)
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func startServer() error {
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d := newDynamicHandler()
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h, err := buildHandler()
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if err != nil {
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return err
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}
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d.swapHandler(h)
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address := ":" + strconv.Itoa(appConfig.server.port)
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srv := &http.Server{
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Addr: address,
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Handler: d,
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}
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go func() {
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if err := srv.ListenAndServe(); err != nil {
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log.Println("Shutting down the server")
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}
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}()
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// Wait for interrupt signal to gracefully shutdown the server with a timeout of 10 seconds.
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quit := make(chan os.Signal, 1)
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signal.Notify(quit, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
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<-quit
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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if err := srv.Shutdown(ctx); err != nil {
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return err
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}
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return nil
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}
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func buildHandler() (http.Handler, error) {
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r := chi.NewRouter()
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if appConfig.server.logging {
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r.Use(middleware.RealIP)
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r.Use(middleware.Logger)
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}
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r.Use(middleware.Recoverer)
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r.Use(middleware.StripSlashes)
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allPostPaths, err := allPostPaths()
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if err != nil {
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return nil, err
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} else {
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for _, path := range allPostPaths {
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if path != "" {
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r.Get(path, servePost)
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}
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}
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}
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return r, nil
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}
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type dynamicHandler struct {
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realHandler http.Handler
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changeMutex *sync.Mutex
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}
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func newDynamicHandler() *dynamicHandler {
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return &dynamicHandler{
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changeMutex: &sync.Mutex{},
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}
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}
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func (d *dynamicHandler) swapHandler(h http.Handler) {
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d.changeMutex.Lock()
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d.realHandler = h
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d.changeMutex.Unlock()
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}
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func (d *dynamicHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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d.realHandler.ServeHTTP(w, r)
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}
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