traefik/pkg/middlewares/compress/compress_test.go
2021-03-04 20:08:03 +01:00

305 lines
8.8 KiB
Go

package compress
import (
"context"
"io"
"net/http"
"net/http/httptest"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/traefik/gziphandler"
"github.com/traefik/traefik/v2/pkg/config/dynamic"
"github.com/traefik/traefik/v2/pkg/testhelpers"
)
const (
acceptEncodingHeader = "Accept-Encoding"
contentEncodingHeader = "Content-Encoding"
contentTypeHeader = "Content-Type"
varyHeader = "Vary"
gzipValue = "gzip"
)
func TestShouldCompressWhenNoContentEncodingHeader(t *testing.T) {
req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
req.Header.Add(acceptEncodingHeader, gzipValue)
baseBody := generateBytes(gziphandler.DefaultMinSize)
next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
_, err := rw.Write(baseBody)
assert.NoError(t, err)
})
handler := &compress{next: next}
rw := httptest.NewRecorder()
handler.ServeHTTP(rw, req)
assert.Equal(t, gzipValue, rw.Header().Get(contentEncodingHeader))
assert.Equal(t, acceptEncodingHeader, rw.Header().Get(varyHeader))
if assert.ObjectsAreEqualValues(rw.Body.Bytes(), baseBody) {
assert.Fail(t, "expected a compressed body", "got %v", rw.Body.Bytes())
}
}
func TestShouldNotCompressWhenContentEncodingHeader(t *testing.T) {
req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
req.Header.Add(acceptEncodingHeader, gzipValue)
fakeCompressedBody := generateBytes(gziphandler.DefaultMinSize)
next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
rw.Header().Add(contentEncodingHeader, gzipValue)
rw.Header().Add(varyHeader, acceptEncodingHeader)
_, err := rw.Write(fakeCompressedBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
})
handler := &compress{next: next}
rw := httptest.NewRecorder()
handler.ServeHTTP(rw, req)
assert.Equal(t, gzipValue, rw.Header().Get(contentEncodingHeader))
assert.Equal(t, acceptEncodingHeader, rw.Header().Get(varyHeader))
assert.EqualValues(t, rw.Body.Bytes(), fakeCompressedBody)
}
func TestShouldNotCompressWhenNoAcceptEncodingHeader(t *testing.T) {
req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
fakeBody := generateBytes(gziphandler.DefaultMinSize)
next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
_, err := rw.Write(fakeBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
})
handler := &compress{next: next}
rw := httptest.NewRecorder()
handler.ServeHTTP(rw, req)
assert.Empty(t, rw.Header().Get(contentEncodingHeader))
assert.EqualValues(t, rw.Body.Bytes(), fakeBody)
}
func TestShouldNotCompressWhenSpecificContentType(t *testing.T) {
baseBody := generateBytes(gziphandler.DefaultMinSize)
testCases := []struct {
desc string
conf dynamic.Compress
reqContentType string
respContentType string
}{
{
desc: "Exclude Request Content-Type",
conf: dynamic.Compress{
ExcludedContentTypes: []string{"text/event-stream"},
},
reqContentType: "text/event-stream",
},
{
desc: "Exclude Response Content-Type",
conf: dynamic.Compress{
ExcludedContentTypes: []string{"text/event-stream"},
},
respContentType: "text/event-stream",
},
{
desc: "application/grpc",
conf: dynamic.Compress{},
reqContentType: "application/grpc",
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
req := testhelpers.MustNewRequest(http.MethodGet, "http://localhost", nil)
req.Header.Add(acceptEncodingHeader, gzipValue)
if test.reqContentType != "" {
req.Header.Add(contentTypeHeader, test.reqContentType)
}
next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
if len(test.respContentType) > 0 {
rw.Header().Set(contentTypeHeader, test.respContentType)
}
_, err := rw.Write(baseBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
})
handler, err := New(context.Background(), next, test.conf, "test")
require.NoError(t, err)
rw := httptest.NewRecorder()
handler.ServeHTTP(rw, req)
assert.Empty(t, rw.Header().Get(acceptEncodingHeader))
assert.Empty(t, rw.Header().Get(contentEncodingHeader))
assert.EqualValues(t, rw.Body.Bytes(), baseBody)
})
}
}
func TestIntegrationShouldNotCompress(t *testing.T) {
fakeCompressedBody := generateBytes(100000)
testCases := []struct {
name string
handler http.Handler
expectedStatusCode int
}{
{
name: "when content already compressed",
handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
rw.Header().Add(contentEncodingHeader, gzipValue)
rw.Header().Add(varyHeader, acceptEncodingHeader)
_, err := rw.Write(fakeCompressedBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
}),
expectedStatusCode: http.StatusOK,
},
{
name: "when content already compressed and status code Created",
handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
rw.Header().Add(contentEncodingHeader, gzipValue)
rw.Header().Add(varyHeader, acceptEncodingHeader)
rw.WriteHeader(http.StatusCreated)
_, err := rw.Write(fakeCompressedBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
}),
expectedStatusCode: http.StatusCreated,
},
}
for _, test := range testCases {
t.Run(test.name, func(t *testing.T) {
compress := &compress{next: test.handler}
ts := httptest.NewServer(compress)
defer ts.Close()
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
req.Header.Add(acceptEncodingHeader, gzipValue)
resp, err := http.DefaultClient.Do(req)
require.NoError(t, err)
assert.Equal(t, test.expectedStatusCode, resp.StatusCode)
assert.Equal(t, gzipValue, resp.Header.Get(contentEncodingHeader))
assert.Equal(t, acceptEncodingHeader, resp.Header.Get(varyHeader))
body, err := io.ReadAll(resp.Body)
require.NoError(t, err)
assert.EqualValues(t, fakeCompressedBody, body)
})
}
}
func TestShouldWriteHeaderWhenFlush(t *testing.T) {
next := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
rw.Header().Add(contentEncodingHeader, gzipValue)
rw.Header().Add(varyHeader, acceptEncodingHeader)
rw.WriteHeader(http.StatusUnauthorized)
rw.(http.Flusher).Flush()
_, err := rw.Write([]byte("short"))
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
})
handler := &compress{next: next}
ts := httptest.NewServer(handler)
defer ts.Close()
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
req.Header.Add(acceptEncodingHeader, gzipValue)
resp, err := http.DefaultClient.Do(req)
require.NoError(t, err)
assert.Equal(t, http.StatusUnauthorized, resp.StatusCode)
assert.Equal(t, gzipValue, resp.Header.Get(contentEncodingHeader))
assert.Equal(t, acceptEncodingHeader, resp.Header.Get(varyHeader))
}
func TestIntegrationShouldCompress(t *testing.T) {
fakeBody := generateBytes(100000)
testCases := []struct {
name string
handler http.Handler
expectedStatusCode int
}{
{
name: "when AcceptEncoding header is present",
handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
_, err := rw.Write(fakeBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
}),
expectedStatusCode: http.StatusOK,
},
{
name: "when AcceptEncoding header is present and status code Created",
handler: http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
rw.WriteHeader(http.StatusCreated)
_, err := rw.Write(fakeBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
}),
expectedStatusCode: http.StatusCreated,
},
}
for _, test := range testCases {
t.Run(test.name, func(t *testing.T) {
compress := &compress{next: test.handler}
ts := httptest.NewServer(compress)
defer ts.Close()
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
req.Header.Add(acceptEncodingHeader, gzipValue)
resp, err := http.DefaultClient.Do(req)
require.NoError(t, err)
assert.Equal(t, test.expectedStatusCode, resp.StatusCode)
assert.Equal(t, gzipValue, resp.Header.Get(contentEncodingHeader))
assert.Equal(t, acceptEncodingHeader, resp.Header.Get(varyHeader))
body, err := io.ReadAll(resp.Body)
require.NoError(t, err)
if assert.ObjectsAreEqualValues(body, fakeBody) {
assert.Fail(t, "expected a compressed body", "got %v", body)
}
})
}
}
func generateBytes(length int) []byte {
var value []byte
for i := 0; i < length; i++ {
value = append(value, 0x61+byte(i))
}
return value
}