support reload (just trying)

cmd/megauploader/main.go

@@ -35,7 +35,7 @@ func main() {
 		os.Exit(0)
 	}
 
-	mu := megauploader.MegaUploader{Conf: cfg}
+	mu := megauploader.NewMegaUploader(cfg)
 	mu.SetupRoutes()
 	graceful.Run(*addr, 15*time.Second, http.DefaultServeMux)
 }

http.go

@@ -12,6 +12,7 @@ import (
 	"path"
 	"path/filepath"
 	"strings"
+	"sync"
 
 	rice "github.com/GeertJohan/go.rice"
 	"github.com/c2h5oh/datasize"
@@ -20,7 +21,28 @@ import (
 // MegaUploader acts as controller for all the application. Since this is inherently a web-focused
 // application, it will include http utils
 type MegaUploader struct {
-	Conf Config
+	Conf       Config
+	configLock *sync.RWMutex
+}
+
+// NewMegaUploader create a new mega uploader
+func NewMegaUploader(c Config) MegaUploader {
+	return MegaUploader{Conf: c, configLock: new(sync.RWMutex)}
+}
+
+func (mu *MegaUploader) ChangeConf(newconf Config) {
+	mu.configLock.Lock()
+	mu.Conf = newconf
+	mu.configLock.Unlock()
+}
+
+// confAcquire is a middleware to read-lock configuration
+func (mu *MegaUploader) confAcquire(inner func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		mu.configLock.RLock()
+		inner(w, r)
+		mu.configLock.RUnlock()
+	}
 }
 
 // SetupRoutes adds API routes