-
Notifications
You must be signed in to change notification settings - Fork 1
/
routes.go
184 lines (153 loc) · 4.35 KB
/
routes.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
180
181
182
183
184
package goRouter
import (
"fmt"
"net/http"
"net/url"
"regexp"
"strings"
)
// http method
const (
CONNECT = "CONNECT"
DELETE = "DELETE"
GET = "GET"
HEAD = "HEAD"
OPTIONS = "OPTIONS"
PATCH = "PATCH"
POST = "POST"
PUT = "PUT"
TRACE = "TRACE"
)
//mime-types
const (
applicationJson = "application/json"
applicationXml = "application/xml"
textXml = "text/xml"
)
type Mux struct {
beforeMatch http.HandlerFunc
afterMatch http.HandlerFunc
beforeExecute http.HandlerFunc
afterExecute http.HandlerFunc
routes map[string]map[string][]*route
}
type route struct {
pattern *regexp.Regexp
params []string
handler http.HandlerFunc
}
var muxInstance = &Mux{
beforeMatch: func(rw http.ResponseWriter, req *http.Request) {},
afterMatch: func(rw http.ResponseWriter, req *http.Request) {},
beforeExecute: func(rw http.ResponseWriter, req *http.Request) {},
afterExecute: func(rw http.ResponseWriter, req *http.Request) {},
routes: make(map[string]map[string][]*route),
}
var config = map[string]string{
//路由匹配规则
"matchReg": `^%s$`,
//默认参数匹配规则
"defaultParamsReg": `([^/]+)`,
//查找参数规则
"findParamsReg": `(:\w+)`,
//处理没有带正则规则的参数规则
"processParamsReg": `:\w+`,
//处理带正则规则的参数规则
"processParamsWithReg": `:\w+(\(.*?\))`,
}
func init() {
}
func GetMuxInstance() *Mux {
return muxInstance
}
func (m *Mux) Get(pattern string, handler http.HandlerFunc) {
m.AddRoute(pattern, handler, GET)
}
func (m *Mux) Post(pattern string, handler http.HandlerFunc) {
m.AddRoute(pattern, handler, POST)
}
func (m *Mux) Put(pattern string, handler http.HandlerFunc) {
m.AddRoute(pattern, handler, PUT)
}
func (m *Mux) Delete(pattern string, handler http.HandlerFunc) {
m.AddRoute(pattern, handler, DELETE)
}
func (m *Mux) AddRoute(pattern string, handler http.HandlerFunc, method string) {
pattern = strings.TrimRight(pattern, `/`)
parts := strings.Split(pattern, `/`)
var prefix []string
for _, part := range parts {
if strings.Index(part, ":") == -1 {
prefix = append(prefix, part)
} else {
break
}
}
//找出所有需要匹配的参数
findParamReg := regexp.MustCompile(config["findParamsReg"])
params := findParamReg.FindAllString(pattern, -1)
//先处理带正则规则限定的参数
replaceReg := regexp.MustCompile(config["processParamsWithReg"])
pattern = replaceReg.ReplaceAllString(pattern, "$1")
//没有正则限定的参数,使用默认正则规则来匹配
replaceReg = regexp.MustCompile(config["processParamsReg"])
pattern = replaceReg.ReplaceAllString(pattern, config["defaultParamsReg"])
regex := regexp.MustCompile(fmt.Sprintf(config["matchReg"], pattern))
if _, exist := m.routes[method]; !exist {
m.routes[method] = map[string][]*route{}
}
prefixUrl := strings.Join(prefix, `/`)
if _, exist := m.routes[method][prefixUrl]; !exist {
m.routes[method][prefixUrl] = []*route{}
}
m.routes[method][prefixUrl] = append(m.routes[method][prefixUrl], &route{
pattern: regex,
handler: handler,
params: params,
})
}
func (m *Mux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
m.beforeMatch(w, r)
handler, isMatch := m.match(strings.TrimRight(r.URL.Path, `/`), r)
if !isMatch {
http.NotFound(w, r)
return
}
m.afterMatch(w, r)
m.beforeExecute(w, r)
handler(w, r)
m.afterExecute(w, r)
}
func (m *Mux) match(requestPath string, r *http.Request) (http.HandlerFunc, bool) {
paths := strings.Split(requestPath, `/`)
if _, ok := m.routes[r.Method]; !ok {
return nil, false
}
var path string
for i := len(paths); i > 0; i-- {
path = strings.Join(paths[:i], `/`)
if routes, ok := m.routes[r.Method][path]; ok {
for _, route := range routes {
if !route.pattern.MatchString(requestPath) {
continue
}
//whether need to match the parameters
if len(route.params) > 0 {
matches := route.pattern.FindStringSubmatch(requestPath)
if len(matches) < 2 || len(matches[1:]) != len(route.params) {
// panic("Parameters do not match")
return nil, false
}
values := r.URL.Query()
for i, match := range matches[1:] {
values.Add(route.params[i], match)
}
//reassemble query params and add to RawQuery
r.URL.RawQuery = url.Values(values).Encode() + "&" + r.URL.RawQuery
}
return route.handler, true
}
}
}
return nil, false
}