-
Notifications
You must be signed in to change notification settings - Fork 404
/
server.go
177 lines (146 loc) · 3.89 KB
/
server.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
package http
import (
"bufio"
"fmt"
"io"
"net"
"net/textproto"
"time"
"github.com/nadoo/glider/common/conn"
"github.com/nadoo/glider/common/log"
"github.com/nadoo/glider/common/pool"
"github.com/nadoo/glider/proxy"
)
// NewHTTPServer returns a http proxy server.
func NewHTTPServer(s string, p proxy.Proxy) (proxy.Server, error) {
return NewHTTP(s, nil, p)
}
// ListenAndServe listens on server's addr and serves connections.
func (s *HTTP) ListenAndServe() {
l, err := net.Listen("tcp", s.addr)
if err != nil {
log.F("[http] failed to listen on %s: %v", s.addr, err)
return
}
defer l.Close()
log.F("[http] listening TCP on %s", s.addr)
for {
c, err := l.Accept()
if err != nil {
log.F("[http] failed to accept: %v", err)
continue
}
go s.Serve(c)
}
}
// Serve serves a connection.
func (s *HTTP) Serve(cc net.Conn) {
defer cc.Close()
var c *conn.Conn
switch cc := cc.(type) {
case *conn.Conn:
c = cc
case *net.TCPConn:
cc.SetKeepAlive(true)
c = conn.NewConn(cc)
default:
c = conn.NewConn(cc)
}
req, err := parseRequest(c.Reader())
if err != nil {
log.F("[http] can not parse request from %s", c.RemoteAddr())
return
}
if s.pretend {
fmt.Fprintf(c, "%s 404 Not Found\r\nServer: nginx\r\n\r\n404 Not Found\r\n", req.proto)
log.F("[http] %s <-> %s,pretend as web server", c.RemoteAddr().String(), s.Addr())
return
}
s.servRequest(req, c)
}
func (s *HTTP) servRequest(req *request, c *conn.Conn) {
// Auth
if s.user != "" && s.password != "" {
if user, pass, ok := extractUserPass(req.auth); !ok || user != s.user || pass != s.password {
c.Write([]byte("HTTP/1.1 407 Proxy Authentication Required\r\nProxy-Authenticate: Basic\r\n\r\n"))
log.F("[http] auth failed from %s, auth info: %s:%s", c.RemoteAddr(), user, pass)
return
}
}
if req.method == "CONNECT" {
s.servHTTPS(req, c)
return
}
s.servHTTP(req, c)
}
func (s *HTTP) servHTTPS(r *request, c net.Conn) {
rc, dialer, err := s.proxy.Dial("tcp", r.uri)
if err != nil {
c.Write([]byte(r.proto + " 502 ERROR\r\n\r\n"))
log.F("[http] %s <-> %s [c] via %s, error in dial: %v", c.RemoteAddr(), r.uri, dialer.Addr(), err)
return
}
defer rc.Close()
c.Write([]byte("HTTP/1.1 200 Connection established\r\n\r\n"))
log.F("[http] %s <-> %s [c] via %s", c.RemoteAddr(), r.uri, dialer.Addr())
_, _, err = conn.Relay(c, rc)
if err != nil {
if err, ok := err.(net.Error); ok && err.Timeout() {
return // ignore i/o timeout
}
log.F("[http] relay error: %v", err)
s.proxy.Record(dialer, false)
}
}
func (s *HTTP) servHTTP(req *request, c *conn.Conn) {
rc, dialer, err := s.proxy.Dial("tcp", req.target)
if err != nil {
fmt.Fprintf(c, "%s 502 ERROR\r\n\r\n", req.proto)
log.F("[http] %s <-> %s via %s, error in dial: %v", c.RemoteAddr(), req.target, dialer.Addr(), err)
return
}
defer rc.Close()
buf := pool.GetWriteBuffer()
defer pool.PutWriteBuffer(buf)
// send request to remote server
req.WriteBuf(buf)
_, err = rc.Write(buf.Bytes())
if err != nil {
return
}
// copy the left request bytes to remote server. eg. length specificed or chunked body.
go func() {
if _, err := c.Reader().Peek(1); err == nil {
b := pool.GetBuffer(conn.TCPBufSize)
io.CopyBuffer(rc, c, b)
pool.PutBuffer(b)
rc.SetDeadline(time.Now())
c.SetDeadline(time.Now())
}
}()
r := bufio.NewReader(rc)
tpr := textproto.NewReader(r)
line, err := tpr.ReadLine()
if err != nil {
return
}
proto, code, status, ok := parseStartLine(line)
if !ok {
return
}
header, err := tpr.ReadMIMEHeader()
if err != nil {
log.F("[http] read header error:%s", err)
return
}
header.Set("Proxy-Connection", "close")
header.Set("Connection", "close")
buf.Reset()
writeStartLine(buf, proto, code, status)
writeHeaders(buf, header)
log.F("[http] %s <-> %s", c.RemoteAddr(), req.target)
c.Write(buf.Bytes())
b := pool.GetBuffer(conn.TCPBufSize)
io.CopyBuffer(c, r, b)
pool.PutBuffer(b)
}