remove pathSuffix

.gitignore

@@ -0,0 +1 @@
+goproxy

main.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"os"
 	"os/exec"
+	"path"
 	"path/filepath"
 	"strings"
 	"time"
@@ -40,7 +41,7 @@ func mainHandler(inner http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		fmt.Fprintf(os.Stdout, "goproxy: %s %s download %s\n", r.RemoteAddr, time.Now().Format("2006-01-02 15:04:05"), r.URL.Path)
 		if _, err := os.Stat(filepath.Join(cacheDir, r.URL.Path)); err != nil {
-			suffix := pathSuffix(r.URL.Path)
+			suffix := path.Ext(r.URL.Path)
 			if suffix == ".info" || suffix == ".mod" || suffix == ".zip" {
 				mod := strings.Split(r.URL.Path, "/@v/")
 				if len(mod) != 2 {
@@ -62,9 +63,6 @@ func mainHandler(inner http.Handler) http.Handler {
 				// ignore the error, incorrect tag may be given
 				// forward to inner.ServeHTTP
 				goGet(path, version, suffix, w, r)
-			} else {
-				ReturnBadRequest(w, fmt.Errorf("bad module path:%s", r.URL.Path))
-				return
 			}
 			if strings.HasSuffix(r.URL.Path, "/@v/list") {
 				w.Write([]byte(""))
@@ -75,11 +73,6 @@ func mainHandler(inner http.Handler) http.Handler {
 	})
 }
 
-func pathSuffix(path string) string {
-	suffixIndex := strings.LastIndex(path, ".")
-	return path[suffixIndex:]
-}
-
 func goGet(path, version, suffix string, w http.ResponseWriter, r *http.Request) error {
 	cmd := exec.Command("go", "get", "-d", path+"@"+version)
 	stdout, err := cmd.StdoutPipe()