userspace_test.go

Documentation: go.etcd.io/etcd/server/v3/proxy/tcpproxy

     1  // Copyright 2016 The etcd Authors
     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 tcpproxy
    16  
    17  import (
    18  	"fmt"
    19  	"io/ioutil"
    20  	"net"
    21  	"net/http"
    22  	"net/http/httptest"
    23  	"net/url"
    24  	"testing"
    25  )
    26  
    27  func TestUserspaceProxy(t *testing.T) {
    28  	l, err := net.Listen("tcp", "127.0.0.1:0")
    29  	if err != nil {
    30  		t.Fatal(err)
    31  	}
    32  	defer l.Close()
    33  
    34  	want := "hello proxy"
    35  	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    36  		fmt.Fprint(w, want)
    37  	}))
    38  	defer ts.Close()
    39  
    40  	u, err := url.Parse(ts.URL)
    41  	if err != nil {
    42  		t.Fatal(err)
    43  	}
    44  
    45  	var port uint16
    46  	fmt.Sscanf(u.Port(), "%d", &port)
    47  	p := TCPProxy{
    48  		Listener:  l,
    49  		Endpoints: []*net.SRV{{Target: u.Hostname(), Port: port}},
    50  	}
    51  	go p.Run()
    52  	defer p.Stop()
    53  
    54  	u.Host = l.Addr().String()
    55  
    56  	res, err := http.Get(u.String())
    57  	if err != nil {
    58  		t.Fatal(err)
    59  	}
    60  	got, gerr := ioutil.ReadAll(res.Body)
    61  	res.Body.Close()
    62  	if gerr != nil {
    63  		t.Fatal(gerr)
    64  	}
    65  
    66  	if string(got) != want {
    67  		t.Errorf("got = %s, want %s", got, want)
    68  	}
    69  }
    70  
    71  func TestUserspaceProxyPriority(t *testing.T) {
    72  	l, err := net.Listen("tcp", "127.0.0.1:0")
    73  	if err != nil {
    74  		t.Fatal(err)
    75  	}
    76  	defer l.Close()
    77  
    78  	backends := []struct {
    79  		Payload  string
    80  		Priority uint16
    81  	}{
    82  		{"hello proxy 1", 1},
    83  		{"hello proxy 2", 2},
    84  		{"hello proxy 3", 3},
    85  	}
    86  
    87  	var eps []*net.SRV
    88  	var front *url.URL
    89  	for _, b := range backends {
    90  		backend := b
    91  		ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
    92  			fmt.Fprint(w, backend.Payload)
    93  		}))
    94  		defer ts.Close()
    95  
    96  		front, err = url.Parse(ts.URL)
    97  		if err != nil {
    98  			t.Fatal(err)
    99  		}
   100  
   101  		var port uint16
   102  		fmt.Sscanf(front.Port(), "%d", &port)
   103  
   104  		ep := &net.SRV{Target: front.Hostname(), Port: port, Priority: backend.Priority}
   105  		eps = append(eps, ep)
   106  	}
   107  
   108  	p := TCPProxy{
   109  		Listener:  l,
   110  		Endpoints: eps,
   111  	}
   112  	go p.Run()
   113  	defer p.Stop()
   114  
   115  	front.Host = l.Addr().String()
   116  
   117  	res, err := http.Get(front.String())
   118  	if err != nil {
   119  		t.Fatal(err)
   120  	}
   121  	got, gerr := ioutil.ReadAll(res.Body)
   122  	res.Body.Close()
   123  	if gerr != nil {
   124  		t.Fatal(gerr)
   125  	}
   126  
   127  	want := "hello proxy 1"
   128  	if string(got) != want {
   129  		t.Errorf("got = %s, want %s", got, want)
   130  	}
   131  }
   132
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