mirror of
https://github.com/prometheus/prometheus.git
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144 lines
3.8 KiB
Go
144 lines
3.8 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package httputil
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import (
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"bytes"
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"compress/gzip"
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"compress/zlib"
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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/stretchr/testify/require"
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)
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var (
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mux *http.ServeMux
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server *httptest.Server
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)
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func setup() func() {
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mux = http.NewServeMux()
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server = httptest.NewServer(mux)
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return func() {
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server.Close()
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}
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}
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func getCompressionHandlerFunc() CompressionHandler {
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hf := func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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w.Write([]byte("Hello World!"))
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}
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return CompressionHandler{
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Handler: http.HandlerFunc(hf),
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}
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}
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func TestCompressionHandler_PlainText(t *testing.T) {
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tearDown := setup()
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defer tearDown()
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ch := getCompressionHandlerFunc()
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mux.Handle("/foo_endpoint", ch)
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client := &http.Client{
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Transport: &http.Transport{
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DisableCompression: true,
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},
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}
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resp, err := client.Get(server.URL + "/foo_endpoint")
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require.NoError(t, err, "client get failed with unexpected error")
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defer resp.Body.Close()
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contents, err := io.ReadAll(resp.Body)
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require.NoError(t, err, "unexpected error while creating the response body reader")
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expected := "Hello World!"
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actual := string(contents)
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require.Equal(t, expected, actual, "expected response with content")
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}
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func TestCompressionHandler_Gzip(t *testing.T) {
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tearDown := setup()
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defer tearDown()
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ch := getCompressionHandlerFunc()
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mux.Handle("/foo_endpoint", ch)
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client := &http.Client{
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Transport: &http.Transport{
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DisableCompression: true,
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},
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}
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req, _ := http.NewRequest("GET", server.URL+"/foo_endpoint", nil)
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req.Header.Set(acceptEncodingHeader, gzipEncoding)
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resp, err := client.Do(req)
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require.NoError(t, err, "client get failed with unexpected error")
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defer resp.Body.Close()
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actualHeader := resp.Header.Get(contentEncodingHeader)
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require.Equal(t, gzipEncoding, actualHeader, "unexpected encoding header in response")
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var buf bytes.Buffer
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zr, err := gzip.NewReader(resp.Body)
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require.NoError(t, err, "unexpected error while creating the response body reader")
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_, err = buf.ReadFrom(zr)
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require.NoError(t, err, "unexpected error while reading the response body")
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actual := buf.String()
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expected := "Hello World!"
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require.Equal(t, expected, actual, "unexpected response content")
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}
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func TestCompressionHandler_Deflate(t *testing.T) {
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tearDown := setup()
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defer tearDown()
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ch := getCompressionHandlerFunc()
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mux.Handle("/foo_endpoint", ch)
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client := &http.Client{
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Transport: &http.Transport{
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DisableCompression: true,
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},
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}
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req, _ := http.NewRequest("GET", server.URL+"/foo_endpoint", nil)
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req.Header.Set(acceptEncodingHeader, deflateEncoding)
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resp, err := client.Do(req)
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require.NoError(t, err, "client get failed with unexpected error")
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defer resp.Body.Close()
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actualHeader := resp.Header.Get(contentEncodingHeader)
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require.Equal(t, deflateEncoding, actualHeader, "expected response with encoding header")
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var buf bytes.Buffer
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dr, err := zlib.NewReader(resp.Body)
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require.NoError(t, err, "unexpected error while creating the response body reader")
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_, err = buf.ReadFrom(dr)
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require.NoError(t, err, "unexpected error while reading the response body")
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actual := buf.String()
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expected := "Hello World!"
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require.Equal(t, expected, actual, "expected response with content")
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}
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