-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
128 lines (92 loc) · 2.92 KB
/
main.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
package main
import(
"encoding/json"
"fmt"
"log"
"net"
"net/url"
"net/http"
"net/http/httputil"
"github.com/fsnotify/fsnotify"
"github.com/spf13/viper"
)
var (
allowedIP string
revProxURL string
listenHostPort string
liveReload = false
devMode = false
hostProxy = make(map[string]*httputil.ReverseProxy)
)
type baseHandle struct{}
func headerToJson(header http.Header) {
jsonHeader, err := json.Marshal(header)
if err != nil {
fmt.Println(err)
}
log.Println(string(jsonHeader))
}
func startRevProx() {
h := &baseHandle{}
http.Handle("/", h)
server := &http.Server {
Addr: listenHostPort,
Handler: h,
}
log.Printf("Starting server listening on %s", listenHostPort)
err := server.ListenAndServe()
if err != nil {
panic(err)
}
}
func (h *baseHandle) ServeHTTP(w http.ResponseWriter, r *http.Request) {
rip := r.Header.Get("X-Forwarded-For")
if rip == "" {
var err error
rip, _, err = net.SplitHostPort(r.RemoteAddr)
if err != nil {
log.Println(err)
}
}
r.Header.Add("URL", r.URL.String())
headerToJson(r.Header)
if rip == allowedIP || devMode {
remoteURL, err := url.Parse(revProxURL)
if err != nil {
log.Println(err)
}
proxy := httputil.NewSingleHostReverseProxy(remoteURL)
w.Header().Set("X-Server", "revprox")
proxy.ServeHTTP(w, r)
} else {
http.Error(w, "Not authorized", http.StatusUnauthorized)
}
}
func loadConfig() {
viper.SetConfigName("config")
viper.SetConfigType("yaml")
viper.AddConfigPath("/etc/revprox/")
viper.AddConfigPath(".")
err := viper.ReadInConfig()
if err != nil {
panic(fmt.Errorf("Fatal error config file: %s \n", err))
}
allowedIP = viper.GetString("allowedIP")
revProxURL = viper.GetString("revProxURL")
listenHostPort = viper.GetString("listenHostPort")
liveReload = viper.GetBool("liveReload")
devMode = viper.GetBool("devMode")
if liveReload {
viper.WatchConfig()
viper.OnConfigChange(func(e fsnotify.Event) {
log.Println("Config file changed:", e.Name)
allowedIP = viper.GetString("allowedIP")
revProxURL = viper.GetString("revProxURL")
devMode = viper.GetBool("devMode")
})
}
}
func main() {
loadConfig()
startRevProx()
}