/
http_proxy_js_request.go
179 lines (152 loc) · 3.51 KB
/
http_proxy_js_request.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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
package modules
import (
"bytes"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"strings"
)
type JSHeader struct {
Name string
Value string
}
type JSRequest struct {
Client string
Method string
Version string
Path string
Query string
Hostname string
ContentType string
Headers []JSHeader
Body string
req *http.Request
refHash string
bodyRead bool
}
func NewJSRequest(req *http.Request) *JSRequest {
headers := make([]JSHeader, 0)
cType := ""
for name, values := range req.Header {
for _, value := range values {
headers = append(headers, JSHeader{name, value})
if name == "Content-Type" {
cType = value
}
}
}
jreq := &JSRequest{
Client: strings.Split(req.RemoteAddr, ":")[0],
Method: req.Method,
Version: fmt.Sprintf("%d.%d", req.ProtoMajor, req.ProtoMinor),
Hostname: req.Host,
Path: req.URL.Path,
Query: req.URL.RawQuery,
ContentType: cType,
Headers: headers,
req: req,
bodyRead: false,
}
jreq.UpdateHash()
return jreq
}
func (j *JSRequest) NewHash() string {
hash := fmt.Sprintf("%s.%s.%s.%s.%s.%s.%s", j.Client, j.Method, j.Version, j.Hostname, j.Path, j.Query, j.ContentType)
for _, h := range j.Headers {
hash += fmt.Sprintf(".%s-%s", h.Name, h.Value)
}
hash += "." + j.Body
return hash
}
func (j *JSRequest) UpdateHash() {
j.refHash = j.NewHash()
}
func (j *JSRequest) WasModified() bool {
// body was read
if j.bodyRead == true {
return true
}
// check if any of the fields has been changed
newHash := j.NewHash()
if newHash != j.refHash {
return true
}
return false
}
func (j *JSRequest) GetHeader(name, deflt string) string {
name = strings.ToLower(name)
for _, h := range j.Headers {
if name == strings.ToLower(h.Name) {
return h.Value
}
}
return deflt
}
func (j *JSRequest) SetHeader(name, value string) {
name = strings.ToLower(name)
for i, h := range j.Headers {
if name == strings.ToLower(h.Name) {
j.Headers[i].Value = value
return
}
}
j.Headers = append(j.Headers, JSHeader{name, value})
}
func (j *JSRequest) RemoveHeader(name string) {
name = strings.ToLower(name)
for i, h := range j.Headers {
if name == strings.ToLower(h.Name) {
j.Headers = append(j.Headers[:i], j.Headers[i+1:]...)
}
}
}
func (j *JSRequest) ReadBody() string {
raw, err := ioutil.ReadAll(j.req.Body)
if err != nil {
return ""
}
j.Body = string(raw)
j.bodyRead = true
// reset the request body to the original unread state
j.req.Body = ioutil.NopCloser(bytes.NewBuffer(raw))
return j.Body
}
func (j *JSRequest) ParseForm() map[string]string {
if j.Body == "" {
j.Body = j.ReadBody()
}
form := make(map[string]string, 0)
parts := strings.Split(j.Body, "&")
for _, part := range parts {
nv := strings.SplitN(part, "=", 2)
if len(nv) == 2 {
unescaped, err := url.QueryUnescape(nv[1])
if err == nil {
form[nv[0]] = unescaped
} else {
form[nv[0]] = nv[1]
}
}
}
return form
}
func (j *JSRequest) ToRequest() (req *http.Request) {
url := fmt.Sprintf("%s://%s:%s%s?%s", j.req.URL.Scheme, j.Hostname, j.req.URL.Port(), j.Path, j.Query)
if j.Body == "" {
req, _ = http.NewRequest(j.Method, url, j.req.Body)
} else {
req, _ = http.NewRequest(j.Method, url, strings.NewReader(j.Body))
}
hadType := false
for _, h := range j.Headers {
req.Header.Set(h.Name, h.Value)
if h.Name == "Content-Type" {
hadType = true
}
}
if hadType == false && j.ContentType != "" {
req.Header.Set("Content-Type", j.ContentType)
}
return
}