add content-type response headers (#57)

swagger.go

@@ -3,6 +3,7 @@ package echoSwagger
 import (
 	"html/template"
 	"net/http"
+	"path/filepath"
 	"regexp"
 	"sync"
 
@@ -82,6 +83,18 @@ func EchoWrapHandler(configFns ...func(c *Config)) echo.HandlerFunc {
 			h.Prefix = matches[1]
 		})
 
+
+		switch filepath.Ext(path) {
+		case ".html":
+			c.Response().Header().Set("Content-Type", "text/html; charset=utf-8")
+		case ".css":
+			c.Response().Header().Set("Content-Type", "text/css; charset=utf-8")
+		case ".js":
+			c.Response().Header().Set("Content-Type", "application/javascript")
+		case ".json":
+			c.Response().Header().Set("Content-Type", "application/json; charset=utf-8")
+		}
+
 		defer c.Response().Flush()
 		switch path {
 		case "":
@@ -96,7 +109,6 @@ func EchoWrapHandler(configFns ...func(c *Config)) echo.HandlerFunc {
 				return nil
 			}
 
-			c.Response().Writer.Header().Set("Content-Type", "application/json; charset=utf-8")
 			_, _ = c.Response().Writer.Write([]byte(doc))
 		default:
 			h.ServeHTTP(c.Response().Writer, c.Request())

swagger_test.go

@@ -232,14 +232,13 @@ func (s *mockedSwag) ReadDoc() string {
 }
 
 func TestWrapHandler(t *testing.T) {
-
 	router := echo.New()
 
-	//RegisterEchoHandler(router.GET, "/", nil)
 	router.GET("/*", EchoWrapHandler(DocExpansion("none"), DomID("#swagger-ui")))
 
 	w1 := performRequest("GET", "/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", "/doc.json", router)
 	assert.Equal(t, 500, w2.Code)
@@ -251,11 +250,19 @@ func TestWrapHandler(t *testing.T) {
 	w3 := performRequest("GET", "/favicon-16x16.png", router)
 	assert.Equal(t, 200, w3.Code)
 
-	w4 := performRequest("GET", "/notfound", router)
-	assert.Equal(t, 404, w4.Code)
+	w4 := performRequest("GET", "/swagger-ui.css", router)
+	assert.Equal(t, 200, w4.Code)
+	assert.Equal(t, w4.Header()["Content-Type"][0], "text/css; charset=utf-8")
+
+	w5 := performRequest("GET", "/swagger-ui-bundle.js", router)
+	assert.Equal(t, 200, w5.Code)
+	assert.Equal(t, w5.Header()["Content-Type"][0], "application/javascript")
+
+	w6 := performRequest("GET", "/notfound", router)
+	assert.Equal(t, 404, w6.Code)
 
-	w5 := performRequest("GET", "/", router)
-	assert.Equal(t, 301, w5.Code)
+	w7 := performRequest("GET", "/", router)
+	assert.Equal(t, 301, w7.Code)
 }
 
 func performRequest(method, target string, e *echo.Echo) *httptest.ResponseRecorder {