/
tunnelpeer.go
99 lines (89 loc) · 2.12 KB
/
tunnelpeer.go
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package main
import (
"bufio"
"bytes"
"errors"
"log"
"net"
"net/http"
"net/url"
"strings"
"time"
"github.com/yinghuocho/tarfs"
"github.com/yinghuocho/golibfq/transport/httptran"
)
type wrappedTransport struct {
tr *http.Transport
}
func (t *wrappedTransport) RoundTrip(req *http.Request) (*http.Response, error) {
return t.tr.RoundTrip(req)
}
func (t *wrappedTransport) Close() error {
t.tr.CloseIdleConnections()
return nil
}
var (
meekTR *wrappedTransport = &wrappedTransport{
tr: &http.Transport{
Proxy: nil,
Dial: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Minute,
}).Dial,
TLSHandshakeTimeout: 30 * time.Second,
},
}
)
func (t *tunnelHandler) loadTunnelPeers(fs *tarfs.FileSystem) error {
t.peerGroups = make(map[string][]tunnelPeer)
data, err := fs.Get("meektunnels.txt")
if err != nil {
log.Printf("fail to load embedded meek tunnels (resources/meektunnels.txt): %s", err)
return err
}
scanner := bufio.NewScanner(bytes.NewBuffer(data))
cnt := 0
for scanner.Scan() {
s := strings.Trim(scanner.Text(), " \r\n ")
if !strings.HasPrefix(s, "#") {
pair := strings.Split(s, ",")
if len(pair) != 3 {
continue
}
u, e := url.Parse(pair[0])
if e != nil {
continue
}
peers := t.peerGroups[pair[2]]
t.peerGroups[pair[2]] = append(
peers,
&meekPeer{
group: pair[2],
gen: &httptran.DomainFrontingPollRequestGenerator{
URL: u,
Host: pair[1],
},
})
}
cnt += 1
}
if cnt == 0 {
return errors.New("found no valid meek tunnel")
}
return nil
}
type meekPeer struct {
group string
gen *httptran.DomainFrontingPollRequestGenerator
}
func (m *meekPeer) connect(timeout time.Duration) net.Conn {
conn, err := httptran.NewPollClientSession(meekTR, m.gen)
if err != nil {
return nil
} else {
return conn
}
}
func (m *meekPeer) serialize() string {
return strings.Join([]string{m.gen.URL.String(), m.gen.Host, m.group}, ",")
}