fix: handler reuse on different paths (#63)

* fix handler reuse on 2 different paths

swagger.go

@@ -10,6 +10,7 @@ import (
 	"github.com/labstack/echo/v4"
 	swaggerFiles "github.com/swaggo/files"
 	"github.com/swaggo/swag"
+	"golang.org/x/net/webdav"
 )
 
 // Config stores echoSwagger configuration variables.
@@ -56,8 +57,6 @@ var WrapHandler = EchoWrapHandler()
 func EchoWrapHandler(configFns ...func(c *Config)) echo.HandlerFunc {
 	var once sync.Once
 
-	h := swaggerFiles.Handler
-
 	config := &Config{
 		URL:          "doc.json",
 		DeepLinking:  true,
@@ -75,6 +74,11 @@ func EchoWrapHandler(configFns ...func(c *Config)) echo.HandlerFunc {
 
 	var re = regexp.MustCompile(`^(.*/)([^?].*)?[?|.]*$`)
 
+	h := webdav.Handler{
+		FileSystem: swaggerFiles.FS,
+		LockSystem: webdav.NewMemLS(),
+	}
+
 	return func(c echo.Context) error {
 		matches := re.FindStringSubmatch(c.Request().RequestURI)
 		path := matches[2]

swagger_test.go

@@ -266,6 +266,29 @@ func TestWrapHandler(t *testing.T) {
 	assert.Equal(t, 301, w7.Code)
 }
 
+func TestHandlerReuse(t *testing.T) {
+	router := echo.New()
+
+	router.GET("/swagger/*", EchoWrapHandler())
+	router.GET("/admin/swagger/*", EchoWrapHandler())
+
+	w1 := performRequest("GET", "/swagger/index.html", router)
+	assert.Equal(t, 200, w1.Code)
+	assert.Equal(t, w1.Header()["Content-Type"][0], "text/html; charset=utf-8")
+
+	w2 := performRequest("GET", "/admin/swagger/index.html", router)
+	assert.Equal(t, 200, w2.Code)
+	assert.Equal(t, w2.Header()["Content-Type"][0], "text/html; charset=utf-8")
+
+	w3 := performRequest("GET", "/swagger/index.html", router)
+	assert.Equal(t, 200, w3.Code)
+	assert.Equal(t, w3.Header()["Content-Type"][0], "text/html; charset=utf-8")
+
+	w4 := performRequest("GET", "/admin/swagger/index.html", router)
+	assert.Equal(t, 200, w4.Code)
+	assert.Equal(t, w4.Header()["Content-Type"][0], "text/html; charset=utf-8")
+}
+
 func performRequest(method, target string, e *echo.Echo) *httptest.ResponseRecorder {
 	r := httptest.NewRequest(method, target, nil)
 	w := httptest.NewRecorder()