x/dialer/http2/dialer.go
2024-06-07 20:57:47 +08:00

119 lines
2.5 KiB
Go

package http2
import (
"context"
"net"
"net/http"
"sync"
"time"
net_dialer "github.com/go-gost/core/common/net/dialer"
"github.com/go-gost/core/dialer"
"github.com/go-gost/core/logger"
md "github.com/go-gost/core/metadata"
mdx "github.com/go-gost/x/metadata"
"github.com/go-gost/x/registry"
)
func init() {
registry.DialerRegistry().Register("http2", NewDialer)
}
type http2Dialer struct {
clients map[string]*http.Client
clientMutex sync.Mutex
logger logger.Logger
md metadata
options dialer.Options
}
func NewDialer(opts ...dialer.Option) dialer.Dialer {
options := dialer.Options{}
for _, opt := range opts {
opt(&options)
}
return &http2Dialer{
clients: make(map[string]*http.Client),
logger: options.Logger,
options: options,
}
}
func (d *http2Dialer) Init(md md.Metadata) (err error) {
if err = d.parseMetadata(md); err != nil {
return
}
return nil
}
// Multiplex implements dialer.Multiplexer interface.
func (d *http2Dialer) Multiplex() bool {
return true
}
func (d *http2Dialer) Dial(ctx context.Context, address string, opts ...dialer.DialOption) (net.Conn, error) {
raddr, err := net.ResolveTCPAddr("tcp", address)
if err != nil {
d.logger.Error(err)
return nil, err
}
d.clientMutex.Lock()
defer d.clientMutex.Unlock()
client, ok := d.clients[address]
if !ok {
options := dialer.DialOptions{}
for _, opt := range opts {
opt(&options)
}
{
// Check whether the connection is established properly
netd := options.NetDialer
if netd == nil {
netd = net_dialer.DefaultNetDialer
}
conn, err := netd.Dial(ctx, "tcp", address)
if err != nil {
return nil, err
}
conn.Close()
}
client = &http.Client{
Transport: &http.Transport{
TLSClientConfig: d.options.TLSConfig,
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
netd := options.NetDialer
if netd == nil {
netd = net_dialer.DefaultNetDialer
}
return netd.Dial(ctx, network, addr)
},
ForceAttemptHTTP2: true,
MaxIdleConns: 16,
IdleConnTimeout: 30 * time.Second,
TLSHandshakeTimeout: 30 * time.Second,
ExpectContinueTimeout: 15 * time.Second,
},
}
d.clients[address] = client
}
var c net.Conn = &conn{
localAddr: &net.TCPAddr{},
remoteAddr: raddr,
onClose: func() {
d.clientMutex.Lock()
defer d.clientMutex.Unlock()
delete(d.clients, address)
},
md: mdx.NewMetadata(map[string]any{"client": client}),
}
return c, nil
}