-
Notifications
You must be signed in to change notification settings - Fork 343
/
headers.go
78 lines (67 loc) · 1.85 KB
/
headers.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
package net
import (
"net"
"net/http"
)
// ForwardedHeaders sets non-standard X-Forwarded-* Headers
// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers#proxies and https://github.com/authelia/authelia
type ForwardedHeaders struct {
// For sets or appends request remote IP to the X-Forwarded-For header
For bool
// PrependFor sets or prepends request remote IP to the X-Forwarded-For header, overrides For
PrependFor bool
// Host sets X-Forwarded-Host to the request host
Host bool
// Method sets the http method as X-Forwarded-Method to the request header
Method bool
// Uri sets the path and query as X-Forwarded-Uri header to the request header
Uri bool
// Sets X-Forwarded-Port value
Port string
// Sets X-Forwarded-Proto value
Proto string
}
func (h *ForwardedHeaders) Set(req *http.Request) {
if (h.For || h.PrependFor) && req.RemoteAddr != "" {
addr := req.RemoteAddr
if host, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
addr = host
}
v := req.Header.Get("X-Forwarded-For")
if v == "" {
v = addr
} else if h.PrependFor {
v = addr + ", " + v
} else {
v = v + ", " + addr
}
req.Header.Set("X-Forwarded-For", v)
}
if h.Host {
req.Header.Set("X-Forwarded-Host", req.Host)
}
if h.Method {
req.Header.Set("X-Forwarded-Method", req.Method)
}
if h.Uri {
req.Header.Set("X-Forwarded-Uri", req.RequestURI)
}
if h.Port != "" {
req.Header.Set("X-Forwarded-Port", h.Port)
}
if h.Proto != "" {
req.Header.Set("X-Forwarded-Proto", h.Proto)
}
}
type ForwardedHeadersHandler struct {
Headers ForwardedHeaders
Exclude IPNets
Handler http.Handler
}
func (h *ForwardedHeadersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
host, _, err := net.SplitHostPort(r.RemoteAddr)
if err == nil && !h.Exclude.Contain(net.ParseIP(host)) {
h.Headers.Set(r)
}
h.Handler.ServeHTTP(w, r)
}