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// Copyright 2013 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package handlers
import (
"bufio"
"io"
"net"
"net/http"
"net/http/httptest"
"strconv"
"testing"
)
var contentType = "text/plain; charset=utf-8"
func compressedRequest(w *httptest.ResponseRecorder, compression string) {
CompressHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Length", strconv.Itoa(9*1024))
w.Header().Set("Content-Type", contentType)
for i := 0; i < 1024; i++ {
io.WriteString(w, "Gorilla!\n")
}
})).ServeHTTP(w, &http.Request{
Method: "GET",
Header: http.Header{
"Accept-Encoding": []string{compression},
},
})
}
func TestCompressHandlerNoCompression(t *testing.T) {
w := httptest.NewRecorder()
compressedRequest(w, "")
if enc := w.HeaderMap.Get("Content-Encoding"); enc != "" {
t.Errorf("wrong content encoding, got %q want %q", enc, "")
}
if ct := w.HeaderMap.Get("Content-Type"); ct != contentType {
t.Errorf("wrong content type, got %q want %q", ct, contentType)
}
if w.Body.Len() != 1024*9 {
t.Errorf("wrong len, got %d want %d", w.Body.Len(), 1024*9)
}
if l := w.HeaderMap.Get("Content-Length"); l != "9216" {
t.Errorf("wrong content-length. got %q expected %d", l, 1024*9)
}
}
func TestCompressHandlerGzip(t *testing.T) {
w := httptest.NewRecorder()
compressedRequest(w, "gzip")
if w.HeaderMap.Get("Content-Encoding") != "gzip" {
t.Errorf("wrong content encoding, got %q want %q", w.HeaderMap.Get("Content-Encoding"), "gzip")
}
if w.HeaderMap.Get("Content-Type") != "text/plain; charset=utf-8" {
t.Errorf("wrong content type, got %s want %s", w.HeaderMap.Get("Content-Type"), "text/plain; charset=utf-8")
}
if w.Body.Len() != 72 {
t.Errorf("wrong len, got %d want %d", w.Body.Len(), 72)
}
if l := w.HeaderMap.Get("Content-Length"); l != "" {
t.Errorf("wrong content-length. got %q expected %q", l, "")
}
}
func TestCompressHandlerDeflate(t *testing.T) {
w := httptest.NewRecorder()
compressedRequest(w, "deflate")
if w.HeaderMap.Get("Content-Encoding") != "deflate" {
t.Fatalf("wrong content encoding, got %q want %q", w.HeaderMap.Get("Content-Encoding"), "deflate")
}
if w.HeaderMap.Get("Content-Type") != "text/plain; charset=utf-8" {
t.Fatalf("wrong content type, got %s want %s", w.HeaderMap.Get("Content-Type"), "text/plain; charset=utf-8")
}
if w.Body.Len() != 54 {
t.Fatalf("wrong len, got %d want %d", w.Body.Len(), 54)
}
}
func TestCompressHandlerGzipDeflate(t *testing.T) {
w := httptest.NewRecorder()
compressedRequest(w, "gzip, deflate ")
if w.HeaderMap.Get("Content-Encoding") != "gzip" {
t.Fatalf("wrong content encoding, got %q want %q", w.HeaderMap.Get("Content-Encoding"), "gzip")
}
if w.HeaderMap.Get("Content-Type") != "text/plain; charset=utf-8" {
t.Fatalf("wrong content type, got %s want %s", w.HeaderMap.Get("Content-Type"), "text/plain; charset=utf-8")
}
}
type fullyFeaturedResponseWriter struct{}
// Header/Write/WriteHeader implement the http.ResponseWriter interface.
func (fullyFeaturedResponseWriter) Header() http.Header {
return http.Header{}
}
func (fullyFeaturedResponseWriter) Write([]byte) (int, error) {
return 0, nil
}
func (fullyFeaturedResponseWriter) WriteHeader(int) {}
// Flush implements the http.Flusher interface.
func (fullyFeaturedResponseWriter) Flush() {}
// Hijack implements the http.Hijacker interface.
func (fullyFeaturedResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
return nil, nil, nil
}
// CloseNotify implements the http.CloseNotifier interface.
func (fullyFeaturedResponseWriter) CloseNotify() <-chan bool {
return nil
}
func TestCompressHandlerPreserveInterfaces(t *testing.T) {
// Compile time validation fullyFeaturedResponseWriter implements all the
// interfaces we're asserting in the test case below.
var (
_ http.Flusher = fullyFeaturedResponseWriter{}
_ http.CloseNotifier = fullyFeaturedResponseWriter{}
_ http.Hijacker = fullyFeaturedResponseWriter{}
)
var h http.Handler = http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
comp := r.Header.Get("Accept-Encoding")
if _, ok := rw.(*compressResponseWriter); !ok {
t.Fatalf("ResponseWriter wasn't wrapped by compressResponseWriter, got %T type", rw)
}
if _, ok := rw.(http.Flusher); !ok {
t.Errorf("ResponseWriter lost http.Flusher interface for %q", comp)
}
if _, ok := rw.(http.CloseNotifier); !ok {
t.Errorf("ResponseWriter lost http.CloseNotifier interface for %q", comp)
}
if _, ok := rw.(http.Hijacker); !ok {
t.Errorf("ResponseWriter lost http.Hijacker interface for %q", comp)
}
})
h = CompressHandler(h)
var (
rw fullyFeaturedResponseWriter
)
r, err := http.NewRequest("GET", "/", nil)
if err != nil {
t.Fatalf("Failed to create test request: %v", err)
}
r.Header.Set("Accept-Encoding", "gzip")
h.ServeHTTP(rw, r)
r.Header.Set("Accept-Encoding", "deflate")
h.ServeHTTP(rw, r)
}
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