add a new function RouteRegister which supports *gin.RouterGroup… (#20)

first parameter

pprof.go

@@ -24,9 +24,16 @@ func getPrefix(prefixOptions ...string) string {
 // the provided gin.Engine. prefixOptions is a optional. If not prefixOptions,
 // the default path prefix is used, otherwise first prefixOptions will be path prefix.
 func Register(r *gin.Engine, prefixOptions ...string) {
+	RouteRegister(&(r.RouterGroup), prefixOptions...)
+}
+
+// RouteRegister the standard HandlerFuncs from the net/http/pprof package with
+// the provided gin.GrouterGroup. prefixOptions is a optional. If not prefixOptions,
+// the default path prefix is used, otherwise first prefixOptions will be path prefix.
+func RouteRegister(rg *gin.RouterGroup, prefixOptions ...string) {
 	prefix := getPrefix(prefixOptions...)
 
-	prefixRouter := r.Group(prefix)
+	prefixRouter := rg.Group(prefix)
 	{
 		prefixRouter.GET("/", pprofHandler(pprof.Index))
 		prefixRouter.GET("/cmdline", pprofHandler(pprof.Cmdline))

pprof_test.go

@@ -1,6 +1,12 @@
 package pprof
 
-import "testing"
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
 
 func Test_getPrefix(t *testing.T) {
 	tests := []struct {
@@ -18,3 +24,43 @@ func Test_getPrefix(t *testing.T) {
 		}
 	}
 }
+
+func TestRegisterAndRouteRegister(t *testing.T) {
+	bearerToken := "Bearer token"
+	gin.SetMode(gin.ReleaseMode)
+	r := gin.New()
+	Register(r)
+	adminGroup := r.Group("/admin", func(c *gin.Context) {
+		if c.Request.Header.Get("Authorization") != bearerToken {
+			c.AbortWithStatus(http.StatusForbidden)
+			return
+		}
+		c.Next()
+	})
+	RouteRegister(adminGroup, "pprof")
+
+	req, _ := http.NewRequest(http.MethodGet, "/debug/pprof/", nil)
+	rw := httptest.NewRecorder()
+	r.ServeHTTP(rw, req)
+
+	if expected, got := http.StatusOK, rw.Code; expected != got {
+		t.Errorf("expected: %d, got: %d", expected, got)
+	}
+
+	req, _ = http.NewRequest(http.MethodGet, "/admin/pprof/", nil)
+	rw = httptest.NewRecorder()
+	r.ServeHTTP(rw, req)
+
+	if expected, got := http.StatusForbidden, rw.Code; expected != got {
+		t.Errorf("expected: %d, got: %d", expected, got)
+	}
+
+	req, _ = http.NewRequest(http.MethodGet, "/admin/pprof/", nil)
+	req.Header.Set("Authorization", bearerToken)
+	rw = httptest.NewRecorder()
+	r.ServeHTTP(rw, req)
+
+	if expected, got := http.StatusOK, rw.Code; expected != got {
+		t.Errorf("expected: %d, got: %d", expected, got)
+	}
+}