445 lines
12 KiB
Go
445 lines
12 KiB
Go
package compress
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import (
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"context"
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"io"
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"net/http"
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"net/http/httptest"
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"testing"
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"github.com/klauspost/compress/gzhttp"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/traefik/traefik/v2/pkg/config/dynamic"
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"github.com/traefik/traefik/v2/pkg/testhelpers"
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)
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const (
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acceptEncodingHeader = "Accept-Encoding"
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contentEncodingHeader = "Content-Encoding"
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contentTypeHeader = "Content-Type"
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varyHeader = "Vary"
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gzipValue = "gzip"
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)
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func TestShouldCompressWhenNoContentEncodingHeader(t *testing.T) {
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req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
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req.Header.Add(acceptEncodingHeader, gzipValue)
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baseBody := generateBytes(gzhttp.DefaultMinSize)
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next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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_, err := rw.Write(baseBody)
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assert.NoError(t, err)
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})
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handler, err := New(context.Background(), next, dynamic.Compress{}, "testing")
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require.NoError(t, err)
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rw := httptest.NewRecorder()
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handler.ServeHTTP(rw, req)
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assert.Equal(t, gzipValue, rw.Header().Get(contentEncodingHeader))
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assert.Equal(t, acceptEncodingHeader, rw.Header().Get(varyHeader))
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if assert.ObjectsAreEqualValues(rw.Body.Bytes(), baseBody) {
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assert.Fail(t, "expected a compressed body", "got %v", rw.Body.Bytes())
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}
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}
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func TestShouldNotCompressWhenContentEncodingHeader(t *testing.T) {
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req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
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req.Header.Add(acceptEncodingHeader, gzipValue)
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fakeCompressedBody := generateBytes(gzhttp.DefaultMinSize)
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next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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rw.Header().Add(contentEncodingHeader, gzipValue)
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rw.Header().Add(varyHeader, acceptEncodingHeader)
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_, err := rw.Write(fakeCompressedBody)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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})
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handler, err := New(context.Background(), next, dynamic.Compress{}, "testing")
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require.NoError(t, err)
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rw := httptest.NewRecorder()
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handler.ServeHTTP(rw, req)
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assert.Equal(t, gzipValue, rw.Header().Get(contentEncodingHeader))
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assert.Equal(t, acceptEncodingHeader, rw.Header().Get(varyHeader))
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assert.EqualValues(t, rw.Body.Bytes(), fakeCompressedBody)
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}
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func TestShouldNotCompressWhenNoAcceptEncodingHeader(t *testing.T) {
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req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
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fakeBody := generateBytes(gzhttp.DefaultMinSize)
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next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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_, err := rw.Write(fakeBody)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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})
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handler, err := New(context.Background(), next, dynamic.Compress{}, "testing")
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require.NoError(t, err)
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rw := httptest.NewRecorder()
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handler.ServeHTTP(rw, req)
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assert.Empty(t, rw.Header().Get(contentEncodingHeader))
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assert.EqualValues(t, rw.Body.Bytes(), fakeBody)
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}
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func TestShouldNotCompressWhenSpecificContentType(t *testing.T) {
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baseBody := generateBytes(gzhttp.DefaultMinSize)
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testCases := []struct {
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desc string
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conf dynamic.Compress
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reqContentType string
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respContentType string
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}{
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{
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desc: "Exclude Request Content-Type",
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conf: dynamic.Compress{
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ExcludedContentTypes: []string{"text/event-stream"},
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},
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reqContentType: "text/event-stream",
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},
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{
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desc: "Exclude Response Content-Type",
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conf: dynamic.Compress{
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ExcludedContentTypes: []string{"text/event-stream"},
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},
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respContentType: "text/event-stream",
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},
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{
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desc: "application/grpc",
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conf: dynamic.Compress{},
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reqContentType: "application/grpc",
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.desc, func(t *testing.T) {
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t.Parallel()
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req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
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req.Header.Add(acceptEncodingHeader, gzipValue)
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if test.reqContentType != "" {
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req.Header.Add(contentTypeHeader, test.reqContentType)
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}
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next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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if len(test.respContentType) > 0 {
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rw.Header().Set(contentTypeHeader, test.respContentType)
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}
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_, err := rw.Write(baseBody)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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})
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handler, err := New(context.Background(), next, test.conf, "test")
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require.NoError(t, err)
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rw := httptest.NewRecorder()
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handler.ServeHTTP(rw, req)
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assert.Empty(t, rw.Header().Get(acceptEncodingHeader))
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assert.Empty(t, rw.Header().Get(contentEncodingHeader))
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assert.EqualValues(t, rw.Body.Bytes(), baseBody)
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})
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}
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}
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func TestIntegrationShouldNotCompress(t *testing.T) {
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fakeCompressedBody := generateBytes(100000)
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testCases := []struct {
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name string
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handler http.Handler
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expectedStatusCode int
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}{
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{
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name: "when content already compressed",
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handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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rw.Header().Add(contentEncodingHeader, gzipValue)
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rw.Header().Add(varyHeader, acceptEncodingHeader)
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_, err := rw.Write(fakeCompressedBody)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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}),
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expectedStatusCode: http.StatusOK,
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},
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{
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name: "when content already compressed and status code Created",
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handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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rw.Header().Add(contentEncodingHeader, gzipValue)
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rw.Header().Add(varyHeader, acceptEncodingHeader)
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rw.WriteHeader(http.StatusCreated)
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_, err := rw.Write(fakeCompressedBody)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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}),
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expectedStatusCode: http.StatusCreated,
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},
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}
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for _, test := range testCases {
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t.Run(test.name, func(t *testing.T) {
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compress, err := New(context.Background(), test.handler, dynamic.Compress{}, "testing")
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require.NoError(t, err)
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ts := httptest.NewServer(compress)
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defer ts.Close()
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req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
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req.Header.Add(acceptEncodingHeader, gzipValue)
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resp, err := http.DefaultClient.Do(req)
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require.NoError(t, err)
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assert.Equal(t, test.expectedStatusCode, resp.StatusCode)
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assert.Equal(t, gzipValue, resp.Header.Get(contentEncodingHeader))
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assert.Equal(t, acceptEncodingHeader, resp.Header.Get(varyHeader))
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body, err := io.ReadAll(resp.Body)
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require.NoError(t, err)
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assert.EqualValues(t, fakeCompressedBody, body)
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})
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}
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}
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func TestShouldWriteHeaderWhenFlush(t *testing.T) {
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next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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rw.Header().Add(contentEncodingHeader, gzipValue)
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rw.Header().Add(varyHeader, acceptEncodingHeader)
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rw.WriteHeader(http.StatusUnauthorized)
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rw.(http.Flusher).Flush()
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_, err := rw.Write([]byte("short"))
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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})
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handler, err := New(context.Background(), next, dynamic.Compress{}, "testing")
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require.NoError(t, err)
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ts := httptest.NewServer(handler)
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defer ts.Close()
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req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
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req.Header.Add(acceptEncodingHeader, gzipValue)
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resp, err := http.DefaultClient.Do(req)
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require.NoError(t, err)
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assert.Equal(t, http.StatusUnauthorized, resp.StatusCode)
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assert.Equal(t, gzipValue, resp.Header.Get(contentEncodingHeader))
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assert.Equal(t, acceptEncodingHeader, resp.Header.Get(varyHeader))
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}
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func TestIntegrationShouldCompress(t *testing.T) {
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fakeBody := generateBytes(100000)
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testCases := []struct {
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name string
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handler http.Handler
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expectedStatusCode int
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}{
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{
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name: "when AcceptEncoding header is present",
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handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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_, err := rw.Write(fakeBody)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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}),
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expectedStatusCode: http.StatusOK,
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},
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{
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name: "when AcceptEncoding header is present and status code Created",
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handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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rw.WriteHeader(http.StatusCreated)
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_, err := rw.Write(fakeBody)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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}),
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expectedStatusCode: http.StatusCreated,
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},
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}
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for _, test := range testCases {
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t.Run(test.name, func(t *testing.T) {
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compress, err := New(context.Background(), test.handler, dynamic.Compress{}, "testing")
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require.NoError(t, err)
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ts := httptest.NewServer(compress)
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defer ts.Close()
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req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
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req.Header.Add(acceptEncodingHeader, gzipValue)
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resp, err := http.DefaultClient.Do(req)
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require.NoError(t, err)
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assert.Equal(t, test.expectedStatusCode, resp.StatusCode)
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assert.Equal(t, gzipValue, resp.Header.Get(contentEncodingHeader))
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assert.Equal(t, acceptEncodingHeader, resp.Header.Get(varyHeader))
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body, err := io.ReadAll(resp.Body)
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require.NoError(t, err)
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if assert.ObjectsAreEqualValues(body, fakeBody) {
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assert.Fail(t, "expected a compressed body", "got %v", body)
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}
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})
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}
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}
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func TestMinResponseBodyBytes(t *testing.T) {
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fakeBody := generateBytes(100000)
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testCases := []struct {
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name string
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minResponseBodyBytes int
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expectedCompression bool
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}{
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{
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name: "should compress",
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expectedCompression: true,
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},
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{
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name: "should not compress",
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minResponseBodyBytes: 100001,
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},
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}
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for _, test := range testCases {
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test := test
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t.Run(test.name, func(t *testing.T) {
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t.Parallel()
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req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
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req.Header.Add(acceptEncodingHeader, gzipValue)
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next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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if _, err := rw.Write(fakeBody); err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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})
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handler, err := New(context.Background(), next, dynamic.Compress{MinResponseBodyBytes: test.minResponseBodyBytes}, "testing")
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require.NoError(t, err)
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rw := httptest.NewRecorder()
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handler.ServeHTTP(rw, req)
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if test.expectedCompression {
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assert.Equal(t, gzipValue, rw.Header().Get(contentEncodingHeader))
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assert.NotEqualValues(t, rw.Body.Bytes(), fakeBody)
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return
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}
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assert.Empty(t, rw.Header().Get(contentEncodingHeader))
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assert.EqualValues(t, rw.Body.Bytes(), fakeBody)
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})
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}
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}
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func BenchmarkCompress(b *testing.B) {
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testCases := []struct {
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name string
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parallel bool
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size int
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}{
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{
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name: "2k",
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size: 2048,
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},
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{
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name: "20k",
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size: 20480,
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},
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{
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name: "100k",
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size: 102400,
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},
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{
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name: "2k parallel",
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parallel: true,
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size: 2048,
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},
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{
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name: "20k parallel",
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parallel: true,
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size: 20480,
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},
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{
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name: "100k parallel",
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parallel: true,
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size: 102400,
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},
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}
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for _, test := range testCases {
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b.Run(test.name, func(b *testing.B) {
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baseBody := generateBytes(test.size)
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next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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_, err := rw.Write(baseBody)
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assert.NoError(b, err)
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})
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handler, _ := New(context.Background(), next, dynamic.Compress{}, "testing")
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req, _ := http.NewRequest("GET", "/whatever", nil)
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req.Header.Set("Accept-Encoding", "gzip")
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b.ReportAllocs()
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b.SetBytes(int64(test.size))
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if test.parallel {
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b.ResetTimer()
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b.RunParallel(func(pb *testing.PB) {
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for pb.Next() {
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runBenchmark(b, req, handler)
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}
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})
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return
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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runBenchmark(b, req, handler)
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}
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})
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}
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}
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func runBenchmark(b *testing.B, req *http.Request, handler http.Handler) {
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b.Helper()
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res := httptest.NewRecorder()
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handler.ServeHTTP(res, req)
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if code := res.Code; code != 200 {
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b.Fatalf("Expected 200 but got %d", code)
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}
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assert.Equal(b, gzipValue, res.Header().Get(contentEncodingHeader))
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}
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func generateBytes(length int) []byte {
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var value []byte
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for i := 0; i < length; i++ {
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value = append(value, 0x61+byte(i))
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}
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return value
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}
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