forked from fatedier/frp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
newhttp.go
211 lines (182 loc) · 5.52 KB
/
newhttp.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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
// Copyright 2017 fatedier, fatedier@gmail.com
//
// 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 vhost
import (
"bytes"
"context"
"errors"
"log"
"net"
"net/http"
"strings"
"sync"
"time"
frpLog "github.com/fatedier/frp/utils/log"
"github.com/fatedier/golib/pool"
)
var (
ErrRouterConfigConflict = errors.New("router config conflict")
ErrNoDomain = errors.New("no such domain")
)
func getHostFromAddr(addr string) (host string) {
strs := strings.Split(addr, ":")
if len(strs) > 1 {
host = strs[0]
} else {
host = addr
}
return
}
type HttpReverseProxyOptions struct {
ResponseHeaderTimeoutS int64
}
type HttpReverseProxy struct {
proxy *ReverseProxy
vhostRouter *VhostRouters
responseHeaderTimeout time.Duration
cfgMu sync.RWMutex
}
func NewHttpReverseProxy(option HttpReverseProxyOptions) *HttpReverseProxy {
if option.ResponseHeaderTimeoutS <= 0 {
option.ResponseHeaderTimeoutS = 60
}
rp := &HttpReverseProxy{
responseHeaderTimeout: time.Duration(option.ResponseHeaderTimeoutS) * time.Second,
vhostRouter: NewVhostRouters(),
}
proxy := &ReverseProxy{
Director: func(req *http.Request) {
req.URL.Scheme = "http"
url := req.Context().Value("url").(string)
oldHost := getHostFromAddr(req.Context().Value("host").(string))
host := rp.GetRealHost(oldHost, url)
if host != "" {
req.Host = host
}
req.URL.Host = req.Host
headers := rp.GetHeaders(oldHost, url)
for k, v := range headers {
req.Header.Set(k, v)
}
},
Transport: &http.Transport{
ResponseHeaderTimeout: rp.responseHeaderTimeout,
DisableKeepAlives: true,
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
url := ctx.Value("url").(string)
host := getHostFromAddr(ctx.Value("host").(string))
return rp.CreateConnection(host, url)
},
},
WebSocketDialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
url := ctx.Value("url").(string)
host := getHostFromAddr(ctx.Value("host").(string))
return rp.CreateConnection(host, url)
},
BufferPool: newWrapPool(),
ErrorLog: log.New(newWrapLogger(), "", 0),
}
rp.proxy = proxy
return rp
}
func (rp *HttpReverseProxy) Register(routeCfg VhostRouteConfig) error {
rp.cfgMu.Lock()
defer rp.cfgMu.Unlock()
_, ok := rp.vhostRouter.Exist(routeCfg.Domain, routeCfg.Location)
if ok {
return ErrRouterConfigConflict
} else {
rp.vhostRouter.Add(routeCfg.Domain, routeCfg.Location, &routeCfg)
}
return nil
}
func (rp *HttpReverseProxy) UnRegister(domain string, location string) {
rp.cfgMu.Lock()
defer rp.cfgMu.Unlock()
rp.vhostRouter.Del(domain, location)
}
func (rp *HttpReverseProxy) GetRealHost(domain string, location string) (host string) {
vr, ok := rp.getVhost(domain, location)
if ok {
host = vr.payload.(*VhostRouteConfig).RewriteHost
}
return
}
func (rp *HttpReverseProxy) GetHeaders(domain string, location string) (headers map[string]string) {
vr, ok := rp.getVhost(domain, location)
if ok {
headers = vr.payload.(*VhostRouteConfig).Headers
}
return
}
func (rp *HttpReverseProxy) CreateConnection(domain string, location string) (net.Conn, error) {
vr, ok := rp.getVhost(domain, location)
if ok {
fn := vr.payload.(*VhostRouteConfig).CreateConnFn
if fn != nil {
return fn()
}
}
return nil, ErrNoDomain
}
func (rp *HttpReverseProxy) CheckAuth(domain, location, user, passwd string) bool {
vr, ok := rp.getVhost(domain, location)
if ok {
checkUser := vr.payload.(*VhostRouteConfig).Username
checkPasswd := vr.payload.(*VhostRouteConfig).Password
if (checkUser != "" || checkPasswd != "") && (checkUser != user || checkPasswd != passwd) {
return false
}
}
return true
}
func (rp *HttpReverseProxy) getVhost(domain string, location string) (vr *VhostRouter, ok bool) {
rp.cfgMu.RLock()
defer rp.cfgMu.RUnlock()
// first we check the full hostname
// if not exist, then check the wildcard_domain such as *.example.com
vr, ok = rp.vhostRouter.Get(domain, location)
if ok {
return
}
domainSplit := strings.Split(domain, ".")
if len(domainSplit) < 3 {
return vr, false
}
domainSplit[0] = "*"
domain = strings.Join(domainSplit, ".")
vr, ok = rp.vhostRouter.Get(domain, location)
return
}
func (rp *HttpReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
domain := getHostFromAddr(req.Host)
location := req.URL.Path
user, passwd, _ := req.BasicAuth()
if !rp.CheckAuth(domain, location, user, passwd) {
rw.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
http.Error(rw, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
return
}
rp.proxy.ServeHTTP(rw, req)
}
type wrapPool struct{}
func newWrapPool() *wrapPool { return &wrapPool{} }
func (p *wrapPool) Get() []byte { return pool.GetBuf(32 * 1024) }
func (p *wrapPool) Put(buf []byte) { pool.PutBuf(buf) }
type wrapLogger struct{}
func newWrapLogger() *wrapLogger { return &wrapLogger{} }
func (l *wrapLogger) Write(p []byte) (n int, err error) {
frpLog.Warn("%s", string(bytes.TrimRight(p, "\n")))
return len(p), nil
}