generated from xmidt-org/.go-template
/
configurableListener.go
133 lines (122 loc) · 4.02 KB
/
configurableListener.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/**
* Copyright 2019 Comcast Cable Communications Management, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package main
import (
"crypto/sha1"
"fmt"
"net/http"
"os"
"time"
"github.com/go-kit/kit/metrics/provider"
"github.com/justinas/alice"
"github.com/spf13/viper"
"github.com/xmidt-org/bascule/acquire"
"github.com/xmidt-org/bascule/basculehttp"
webhook "github.com/xmidt-org/wrp-listener"
"github.com/xmidt-org/wrp-listener/hashTokenFactory"
secretGetter "github.com/xmidt-org/wrp-listener/secret"
"github.com/xmidt-org/wrp-listener/webhookClient"
"go.uber.org/zap"
)
const (
applicationName = "configurableListener"
)
type Config struct {
AuthHeader string
AuthDelimiter string
WebhookRequest webhook.W
WebhookRegistrationURL string
WebhookTimeout time.Duration
WebhookRegistrationInterval time.Duration
Port string
Endpoint string
ResponseCode int
}
func main() {
// load configuration with viper
v := viper.New()
v.AddConfigPath(".")
v.SetConfigName(applicationName)
err := v.ReadInConfig()
if err != nil {
fmt.Fprintf(os.Stderr, "failed to read in viper config: %v\n", err.Error())
os.Exit(1)
}
config := new(Config)
err = v.Unmarshal(config)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to unmarshal config: %v\n", err.Error())
os.Exit(1)
}
// use constant secret for hash
secretGetter := secretGetter.NewConstantSecret(config.WebhookRequest.Config.Secret)
// set up the middleware
htf, err := hashTokenFactory.New("sha1", sha1.New, secretGetter)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to setup hash token factory: %v\n", err.Error())
os.Exit(1)
}
authConstructor := basculehttp.NewConstructor(
basculehttp.WithTokenFactory("sha1", htf),
basculehttp.WithHeaderName(config.AuthHeader),
basculehttp.WithHeaderDelimiter(config.AuthDelimiter),
)
handler := alice.New(authConstructor)
// set up the registerer
basicConfig := webhookClient.BasicConfig{
Timeout: config.WebhookTimeout,
RegistrationURL: config.WebhookRegistrationURL,
Request: config.WebhookRequest,
}
// This Basic Auth credentials intended to be used for local testing purposes.
// Change this.
acquirer, err := acquire.NewFixedAuthAcquirer("Basic dXNlcjpwYXNz")
if err != nil {
fmt.Fprintf(os.Stderr, "failed to create fixed auth: %v\n", err.Error())
os.Exit(1)
}
registerer, err := webhookClient.NewBasicRegisterer(acquirer, secretGetter, basicConfig)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to setup registerer: %v\n", err.Error())
os.Exit(1)
}
logger, err := zap.NewDevelopment()
if err != nil {
fmt.Fprintf(os.Stderr, "failed to setup logger: %v\n", err.Error())
os.Exit(1)
}
periodicRegisterer, err := webhookClient.NewPeriodicRegisterer(registerer, 55*time.Second, logger, webhookClient.NewMeasures(provider.NewDiscardProvider()))
if err != nil {
fmt.Fprintf(os.Stderr, "failed to setup periodic registerer: %v\n", err.Error())
os.Exit(1)
}
// start the registerer
periodicRegisterer.Start()
// start listening
http.Handle(config.Endpoint, handler.ThenFunc(returnStatus(config.ResponseCode)))
err = http.ListenAndServe(config.Port, nil)
if err != nil {
fmt.Fprintf(os.Stderr, "error serving http requests: %v\n", err.Error())
os.Exit(1)
}
}
func returnStatus(code int) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
fmt.Println("received http request")
w.WriteHeader(code)
}
}