forked from Angey40/BaiduPCS-Go
/
dial.go
79 lines (67 loc) · 1.5 KB
/
dial.go
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package requester
import (
"context"
"crypto/tls"
"net"
"time"
)
var (
dialer = &net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
DualStack: true,
}
)
func getServerName(address string) string {
host, _, err := net.SplitHostPort(address)
if err != nil {
return address
}
return host
}
func dialContext(ctx context.Context, network, address string) (conn net.Conn, err error) {
serverName := getServerName(address)
switch network {
case "tcp", "tcp4", "tcp6":
// 检测缓存
if TCPAddrCache.Existed(serverName) {
return net.DialTCP(network, nil, TCPAddrCache.Get(serverName))
}
var (
ta *net.TCPAddr
done = make(chan struct{})
)
go func() {
// Resolve TCP address
ta, err = net.ResolveTCPAddr(network, address)
close(done)
}()
select {
case <-ctx.Done():
return nil, ctx.Err()
case <-done:
if err != nil {
return nil, err
}
// 加入缓存
TCPAddrCache.Set(serverName, ta)
return net.DialTCP(network, nil, ta)
}
}
// 非 tcp 请求
conn, err = dialer.DialContext(ctx, network, address)
return
}
func dial(network, address string) (conn net.Conn, err error) {
return dialContext(context.Background(), network, address)
}
func dialTLS(network, address string) (tlsConn net.Conn, err error) {
conn, err := dial(network, address)
if err != nil {
return nil, err
}
return tls.Client(conn, &tls.Config{
ServerName: getServerName(address),
InsecureSkipVerify: TLSConfig.InsecureSkipVerify,
}), nil
}