Add debug flag

handlers.go

@@ -63,6 +63,9 @@ func AuthHandler(f *HtpasswdFile, h http.Handler) http.HandlerFunc {
 // CheckConfig returns a http.HandlerFunc that checks whether a configuration exists.
 func CheckConfig(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("CheckConfig()")
+		}
 		config := filepath.Join(c.path, "config")
 		st, err := os.Stat(config)
 		if err != nil {
@@ -77,6 +80,9 @@ func CheckConfig(c *Context) http.HandlerFunc {
 // GetConfig returns a http.HandlerFunc that allows for a config to be retrieved.
 func GetConfig(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("GetConfig()")
+		}
 		config := filepath.Join(c.path, "config")
 		bytes, err := ioutil.ReadFile(config)
 		if err != nil {
@@ -91,6 +97,9 @@ func GetConfig(c *Context) http.HandlerFunc {
 // SaveConfig returns a http.HandlerFunc that allows for a config to be saved.
 func SaveConfig(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("SaveConfig()")
+		}
 		config := filepath.Join(c.path, "config")
 		bytes, err := ioutil.ReadAll(r.Body)
 		if err != nil {
@@ -109,6 +118,9 @@ func SaveConfig(c *Context) http.HandlerFunc {
 // ListBlobs returns a http.HandlerFunc that lists all blobs of a given type in an arbitrary order.
 func ListBlobs(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("ListBlobs()")
+		}
 		vars := strings.Split(r.RequestURI, "/")
 		dir := vars[1]
 		path := filepath.Join(c.path, dir)
@@ -149,6 +161,9 @@ func ListBlobs(c *Context) http.HandlerFunc {
 // CheckBlob returns a http.HandlerFunc that tests whether a blob exists and returns 200, if it does, or 404 otherwise.
 func CheckBlob(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("CheckBlob()")
+		}
 		vars := strings.Split(r.RequestURI, "/")
 		dir := vars[1]
 		name := vars[2]
@@ -171,6 +186,9 @@ func CheckBlob(c *Context) http.HandlerFunc {
 // GetBlob returns a http.HandlerFunc that retrieves a blob from the repository.
 func GetBlob(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("GetBlob()")
+		}
 		vars := strings.Split(r.RequestURI, "/")
 		dir := vars[1]
 		name := vars[2]
@@ -194,6 +212,9 @@ func GetBlob(c *Context) http.HandlerFunc {
 // SaveBlob returns a http.HandlerFunc that saves a blob to the repository.
 func SaveBlob(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("SaveBlob()")
+		}
 		vars := strings.Split(r.RequestURI, "/")
 		dir := vars[1]
 		name := vars[2]
@@ -249,6 +270,9 @@ func SaveBlob(c *Context) http.HandlerFunc {
 // DeleteBlob returns a http.HandlerFunc that deletes a blob from the repository.
 func DeleteBlob(c *Context) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
+		if *debug {
+			log.Println("DeleteBlob()")
+		}
 		vars := strings.Split(r.RequestURI, "/")
 		dir := vars[1]
 		name := vars[2]

main.go

@@ -9,6 +9,8 @@ import (
 	"runtime/pprof"
 )
 
+var debug = flag.Bool("debug", false, "output debug messages")
+
 func setupRoutes(path string) *Router {
 	context := &Context{path}
 

router.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"log"
 	"net/http"
 	"strings"
 )
@@ -114,6 +115,10 @@ func (router *Router) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	uri := r.RequestURI
 	path := strings.Split(uri, "/")
 
+	if *debug {
+		log.Printf("%s %s", method, uri)
+	}
+
 ROUTE:
 	for _, route := range router.routes[method] {
 		if len(route.path) != len(path) {