github.com/google/martian/v3@v3.3.3/martianlog/logger_test.go (about)

     1  // Copyright 2015 Google Inc. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package martianlog
    16  
    17  import (
    18  	"bytes"
    19  	"compress/gzip"
    20  	"fmt"
    21  	"net/http"
    22  	"strings"
    23  	"testing"
    24  
    25  	"github.com/google/martian/v3"
    26  	"github.com/google/martian/v3/parse"
    27  	"github.com/google/martian/v3/proxyutil"
    28  )
    29  
    30  func ExampleLogger() {
    31  	l := NewLogger()
    32  	l.SetLogFunc(func(line string) {
    33  		// Remove \r to make it easier to test with examples.
    34  		fmt.Print(strings.Replace(line, "\r", "", -1))
    35  	})
    36  	l.SetDecode(true)
    37  
    38  	buf := new(bytes.Buffer)
    39  	gw := gzip.NewWriter(buf)
    40  	gw.Write([]byte("request content"))
    41  	gw.Close()
    42  
    43  	req, err := http.NewRequest("GET", "http://example.com/path?querystring", buf)
    44  	if err != nil {
    45  		fmt.Println(err)
    46  		return
    47  	}
    48  	req.TransferEncoding = []string{"chunked"}
    49  	req.Header.Set("Content-Encoding", "gzip")
    50  
    51  	_, remove, err := martian.TestContext(req, nil, nil)
    52  	if err != nil {
    53  		fmt.Println(err)
    54  		return
    55  	}
    56  	defer remove()
    57  
    58  	if err := l.ModifyRequest(req); err != nil {
    59  		fmt.Println(err)
    60  		return
    61  	}
    62  
    63  	res := proxyutil.NewResponse(200, strings.NewReader("response content"), req)
    64  	res.ContentLength = 16
    65  	res.Header.Set("Date", "Tue, 15 Nov 1994 08:12:31 GMT")
    66  	res.Header.Set("Other-Header", "values")
    67  
    68  	if err := l.ModifyResponse(res); err != nil {
    69  		fmt.Println(err)
    70  		return
    71  	}
    72  	// Output:
    73  	// --------------------------------------------------------------------------------
    74  	// Request to http://example.com/path?querystring
    75  	// --------------------------------------------------------------------------------
    76  	// GET http://example.com/path?querystring HTTP/1.1
    77  	// Host: example.com
    78  	// Transfer-Encoding: chunked
    79  	// Content-Encoding: gzip
    80  	//
    81  	// request content
    82  	//
    83  	// --------------------------------------------------------------------------------
    84  	//
    85  	// --------------------------------------------------------------------------------
    86  	// Response from http://example.com/path?querystring
    87  	// --------------------------------------------------------------------------------
    88  	// HTTP/1.1 200 OK
    89  	// Content-Length: 16
    90  	// Date: Tue, 15 Nov 1994 08:12:31 GMT
    91  	// Other-Header: values
    92  	//
    93  	// response content
    94  	// --------------------------------------------------------------------------------
    95  }
    96  
    97  func TestLoggerFromJSON(t *testing.T) {
    98  	msg := []byte(`{
    99  		"log.Logger": {
   100  			"scope": ["request", "response"],
   101  			"headersOnly": true,
   102  			"decode": true
   103  		}
   104  	}`)
   105  
   106  	r, err := parse.FromJSON(msg)
   107  	if err != nil {
   108  		t.Fatalf("parse.FromJSON(): got %v, want no error", err)
   109  	}
   110  
   111  	reqmod := r.RequestModifier()
   112  	if reqmod == nil {
   113  		t.Fatal("r.RequestModifier(): got nil, want not nil")
   114  	}
   115  	if _, ok := reqmod.(*Logger); !ok {
   116  		t.Error("reqmod.(*Logger): got !ok, want ok")
   117  	}
   118  
   119  	resmod := r.ResponseModifier()
   120  	if resmod == nil {
   121  		t.Fatal("r.ResponseModifier(): got nil, want not nil")
   122  	}
   123  
   124  	l, ok := resmod.(*Logger)
   125  	if !ok {
   126  		t.Error("resmod.(*Logger); got !ok, want ok")
   127  	}
   128  
   129  	if !l.headersOnly {
   130  		t.Error("l.headersOnly: got false, want true")
   131  	}
   132  
   133  	if !l.decode {
   134  		t.Error("l.decode: got false, want true")
   135  	}
   136  }