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
|
// Copyright 2015 Light Code Labs, 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 header
import (
"net/http"
"github.com/mholt/caddy"
"github.com/mholt/caddy/caddyhttp/httpserver"
)
func init() {
caddy.RegisterPlugin("header", caddy.Plugin{
ServerType: "http",
Action: setup,
})
}
// setup configures a new Headers middleware instance.
func setup(c *caddy.Controller) error {
rules, err := headersParse(c)
if err != nil {
return err
}
httpserver.GetConfig(c).AddMiddleware(func(next httpserver.Handler) httpserver.Handler {
return Headers{Next: next, Rules: rules}
})
return nil
}
func headersParse(c *caddy.Controller) ([]Rule, error) {
var rules []Rule
for c.NextLine() {
var head Rule
head.Headers = http.Header{}
var isNewPattern bool
if !c.NextArg() {
return rules, c.ArgErr()
}
pattern := c.Val()
// See if we already have a definition for this Path pattern...
for _, h := range rules {
if h.Path == pattern {
head = h
break
}
}
// ...otherwise, this is a new pattern
if head.Path == "" {
head.Path = pattern
isNewPattern = true
}
for c.NextBlock() {
// A block of headers was opened...
name := c.Val()
value := ""
args := c.RemainingArgs()
if len(args) > 1 {
return rules, c.ArgErr()
} else if len(args) == 1 {
value = args[0]
}
head.Headers.Add(name, value)
}
if c.NextArg() {
// ... or single header was defined as an argument instead.
name := c.Val()
value := c.Val()
if c.NextArg() {
value = c.Val()
}
head.Headers.Add(name, value)
}
if isNewPattern {
rules = append(rules, head)
} else {
for i := 0; i < len(rules); i++ {
if rules[i].Path == pattern {
rules[i] = head
break
}
}
}
}
return rules, nil
}
|
