feat: support for gzip middleware (#53)

.gitignore

@@ -9,4 +9,8 @@
 
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
-dist
+dist
+
+.idea
+vendor
+.envrc

example/basic/main.go

@@ -5,7 +5,7 @@ import (
 	"github.com/swaggo/gin-swagger"
 	"github.com/swaggo/gin-swagger/swaggerFiles"
 
-	_ "github.com/swaggo/gin-swagger/example/docs"
+	_ "github.com/swaggo/gin-swagger/example/basic/docs"
 )
 
 // @title Swagger Example API

example/gzipped/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"github.com/gin-contrib/gzip"
+	"github.com/gin-gonic/gin"
+	"github.com/swaggo/gin-swagger"
+	"github.com/swaggo/gin-swagger/swaggerFiles"
+
+	_ "github.com/swaggo/gin-swagger/example/basic/docs"
+)
+
+// @title Swagger Example API
+// @version 1.0
+// @description This is a sample server Petstore server.
+// @termsOfService http://swagger.io/terms/
+
+// @contact.name API Support
+// @contact.url http://www.swagger.io/support
+// @contact.email support@swagger.io
+
+// @license.name Apache 2.0
+// @license.url http://www.apache.org/licenses/LICENSE-2.0.html
+
+// @host petstore.swagger.io
+// @BasePath /v2
+func main() {
+	r := gin.New()
+
+	r.Use(gzip.Gzip(gzip.BestSpeed))
+
+	url := ginSwagger.URL("http://localhost:8080/swagger/doc.json") //The url pointing to API definition
+	r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler, url))
+
+	r.Run()
+}

go.mod

@@ -1,15 +1,11 @@
 module github.com/swaggo/gin-swagger
 
 require (
-	github.com/gin-contrib/sse v0.0.0-20170109093832-22d885f9ecc7 // indirect
+	github.com/gin-contrib/gzip v0.0.1
 	github.com/gin-gonic/gin v1.3.0
 	github.com/go-openapi/jsonreference v0.18.0 // indirect
 	github.com/go-openapi/spec v0.18.0 // indirect
-	github.com/golang/protobuf v1.2.0 // indirect
 	github.com/json-iterator/go v1.1.6 // indirect
-	github.com/mattn/go-isatty v0.0.4 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/stretchr/testify v1.3.0
 	github.com/swaggo/swag v1.4.0
@@ -18,7 +14,5 @@ require (
 	golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 // indirect
 	golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc // indirect
 	golang.org/x/tools v0.0.0-20190110015856-aa033095749b // indirect
-	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
-	gopkg.in/go-playground/validator.v8 v8.18.2 // indirect
 	gopkg.in/yaml.v2 v2.2.2 // indirect
 )

go.sum

@@ -6,6 +6,8 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gin-contrib/gzip v0.0.1 h1:ezvKOL6jH+jlzdHNE4h9h8q8uMpDQjyl0NN0Jd7jozc=
+github.com/gin-contrib/gzip v0.0.1/go.mod h1:fGBJBCdt6qCZuCAOwWuFhBB4OOq9EFqlo5dEaFhhu5w=
 github.com/gin-contrib/sse v0.0.0-20170109093832-22d885f9ecc7 h1:AzN37oI0cOS+cougNAV9szl6CVoj2RYwzS3DpUQNtlY=
 github.com/gin-contrib/sse v0.0.0-20170109093832-22d885f9ecc7/go.mod h1:VJ0WA2NBN22VlZ2dKZQPAPnyWw5XTlK1KymzLKsr59s=
 github.com/gin-gonic/gin v1.3.0 h1:kCmZyPklC0gVdL728E6Aj20uYBJV93nj/TkwBTKhFbs=
@@ -21,6 +23,7 @@ github.com/go-openapi/swag v0.17.0 h1:iqrgMg7Q7SvtbWLlltPrkMs0UBJI6oTSs79JFRUi88
 github.com/go-openapi/swag v0.17.0/go.mod h1:AByQ+nYG6gQg71GINrmuDXCPWdL640yX49/kXLo40Tg=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/json-iterator/go v1.1.5/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/json-iterator/go v1.1.6 h1:MrUvLMLTMxbqFJ9kzlvat/rYZqZnW3u4wkLzWTaFwKs=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/mailru/easyjson v0.0.0-20180823135443-60711f1a8329 h1:2gxZ0XQIU/5z3Z3bUBu+FXuk2pFbkN6tcwi/pjyaDic=
@@ -41,13 +44,17 @@ github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/swaggo/swag v1.4.0 h1:exX5ES4CdJWCCKmVPE+FAIN66cnHeMHU3i2SCMibBZc=
 github.com/swaggo/swag v1.4.0/go.mod h1:hog2WgeMOrQ/LvQ+o1YGTeT+vWVrbi0SiIslBtxKTyM=
+github.com/ugorji/go/codec v0.0.0-20181022190402-e5e69e061d4f/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
 github.com/ugorji/go/codec v0.0.0-20181209151446-772ced7fd4c2 h1:EICbibRW4JNKMcY+LsWmuwob+CRS1BmdRdjphAm9mH4=
 github.com/ugorji/go/codec v0.0.0-20181209151446-772ced7fd4c2/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
 golang.org/x/net v0.0.0-20181005035420-146acd28ed58/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e h1:bRhVy7zSSasaqNksaRZiA5EEI+Ei4I1nO5Jh72wfHlg=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 h1:bjcUS9ztw9kFmmIxJInhon/0Is3p+EHBKNgquIzo1OI=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20181228144115-9a3f9b0469bb/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc h1:4gbWbmmPFp4ySWICouJl6emP0MyS31yy9SrTlAGFT+g=
 golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=

swagger.go

@@ -4,6 +4,7 @@ import (
 	"html/template"
 	"os"
 	"regexp"
+	"strings"
 
 	"golang.org/x/net/webdav"
 
@@ -61,6 +62,16 @@ func CustomWrapHandler(config *Config, h *webdav.Handler) gin.HandlerFunc {
 		prefix := matches[1]
 		h.Prefix = prefix
 
+		if strings.HasSuffix(path, ".html") {
+			c.Header("Content-Type", "text/html; charset=utf-8")
+		} else if strings.HasSuffix(path, ".css") {
+			c.Header("Content-Type", "text/css; charset=utf-8")
+		} else if strings.HasSuffix(path, ".js") {
+			c.Header("Content-Type", "application/javascript")
+		} else if strings.HasSuffix(path, ".json") {
+			c.Header("Content-Type", "application/json")
+		}
+
 		switch path {
 		case "index.html":
 			index.Execute(c.Writer, &swaggerUIBundle{

swagger_test.go

@@ -1,6 +1,7 @@
 package ginSwagger
 
 import (
+	"github.com/gin-contrib/gzip"
 	"net/http/httptest"
 	"os"
 	"testing"
@@ -9,7 +10,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/swaggo/gin-swagger/swaggerFiles"
 
-	_ "github.com/swaggo/gin-swagger/example/docs"
+	_ "github.com/swaggo/gin-swagger/example/basic/docs"
 )
 
 func TestWrapHandler(t *testing.T) {
@@ -97,6 +98,31 @@ func TestDisablingCustomWrapHandler(t *testing.T) {
 	assert.Equal(t, 404, w11.Code)
 }
 
+func TestWithGzipMiddleware(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+
+	router.Use(gzip.Gzip(gzip.BestSpeed))
+
+	router.GET("/*any", WrapHandler(swaggerFiles.Handler))
+
+	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", "/swagger-ui.css", router)
+	assert.Equal(t, 200, w2.Code)
+	assert.Equal(t, w2.Header()["Content-Type"][0], "text/css; charset=utf-8")
+
+	w3 := performRequest("GET", "/swagger-ui-bundle.js", router)
+	assert.Equal(t, 200, w3.Code)
+	assert.Equal(t, w3.Header()["Content-Type"][0], "application/javascript")
+
+	w4 := performRequest("GET", "/doc.json", router)
+	assert.Equal(t, 200, w4.Code)
+	assert.Equal(t, w4.Header()["Content-Type"][0], "application/json")
+}
+
 func performRequest(method, target string, router *gin.Engine) *httptest.ResponseRecorder {
 	r := httptest.NewRequest(method, target, nil)
 	w := httptest.NewRecorder()