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gzip_test.go
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gzip_test.go
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package gzip
import (
"compress/gzip"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"net/http/httputil"
"net/url"
"strconv"
"testing"
"github.com/gin-gonic/gin"
"github.com/stretchr/testify/assert"
)
const (
testResponse = "Gzip Test Response "
testReverseResponse = "Gzip Test Reverse Response "
)
func init() {
gin.SetMode(gin.ReleaseMode)
}
type rServer struct{}
func (s *rServer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
fmt.Fprint(rw, testReverseResponse)
}
type closeNotifyingRecorder struct {
*httptest.ResponseRecorder
closed chan bool
}
func newCloseNotifyingRecorder() *closeNotifyingRecorder {
return &closeNotifyingRecorder{
httptest.NewRecorder(),
make(chan bool, 1),
}
}
func (c *closeNotifyingRecorder) close() {
c.closed <- true
}
func (c *closeNotifyingRecorder) CloseNotify() <-chan bool {
return c.closed
}
func newServer() *gin.Engine {
// init reverse proxy server
rServer := httptest.NewServer(new(rServer))
target, _ := url.Parse(rServer.URL)
rp := httputil.NewSingleHostReverseProxy(target)
router := gin.New()
router.Use(Gzip(DefaultCompression))
router.GET("/", func(c *gin.Context) {
c.Header("Content-Length", strconv.Itoa(len(testResponse)))
c.String(200, testResponse)
})
router.Any("/reverse", func(c *gin.Context) {
rp.ServeHTTP(c.Writer, c.Request)
})
return router
}
func TestGzip(t *testing.T) {
req, _ := http.NewRequest("GET", "/", nil)
req.Header.Add("Accept-Encoding", "gzip")
w := httptest.NewRecorder()
r := newServer()
r.ServeHTTP(w, req)
assert.Equal(t, w.Code, 200)
assert.Equal(t, w.Header().Get("Content-Encoding"), "gzip")
assert.Equal(t, w.Header().Get("Vary"), "Accept-Encoding")
assert.NotEqual(t, w.Result().Header.Get("Content-Length"), "0")
assert.NotEqual(t, w.Body.Len(), 19)
assert.NotEqual(t, "19", w.Result().Header.Get("Content-Length"))
// The middleware is streaming the content before knowing the size.
// Headers are written before knowing the final response size.
// Probably a future feature
assert.Equal(t, 0, len(w.Result().Header["Content-Length"]))
gr, err := gzip.NewReader(w.Body)
assert.NoError(t, err)
defer gr.Close()
body, _ := ioutil.ReadAll(gr)
assert.Equal(t, string(body), testResponse)
}
func TestGzipPNG(t *testing.T) {
req, _ := http.NewRequest("GET", "/image.png", nil)
req.Header.Add("Accept-Encoding", "gzip")
router := gin.New()
router.Use(Gzip(DefaultCompression))
router.GET("/image.png", func(c *gin.Context) {
c.String(200, "this is a PNG!")
})
w := httptest.NewRecorder()
router.ServeHTTP(w, req)
assert.Equal(t, w.Code, 200)
assert.Equal(t, w.Header().Get("Content-Encoding"), "")
assert.Equal(t, w.Header().Get("Vary"), "")
assert.Equal(t, w.Body.String(), "this is a PNG!")
}
func TestNoGzip(t *testing.T) {
req, _ := http.NewRequest("GET", "/", nil)
w := httptest.NewRecorder()
r := newServer()
r.ServeHTTP(w, req)
assert.Equal(t, w.Code, 200)
assert.Equal(t, w.Header().Get("Content-Encoding"), "")
assert.Equal(t, w.Header().Get("Content-Length"), "19")
assert.Equal(t, w.Body.String(), testResponse)
}
func TestGzipWithReverseProxy(t *testing.T) {
req, _ := http.NewRequest("GET", "/reverse", nil)
req.Header.Add("Accept-Encoding", "gzip")
w := newCloseNotifyingRecorder()
r := newServer()
r.ServeHTTP(w, req)
assert.Equal(t, w.Code, 200)
assert.Equal(t, w.Header().Get("Content-Encoding"), "gzip")
assert.Equal(t, w.Header().Get("Vary"), "Accept-Encoding")
assert.NotEqual(t, w.Header().Get("Content-Length"), "0")
assert.NotEqual(t, w.Body.Len(), 19)
assert.Equal(t, fmt.Sprint(w.Body.Len()), w.Header().Get("Content-Length"))
gr, err := gzip.NewReader(w.Body)
assert.NoError(t, err)
defer gr.Close()
body, _ := ioutil.ReadAll(gr)
assert.Equal(t, string(body), testReverseResponse)
}