113 lines
2.2 KiB
Go
113 lines
2.2 KiB
Go
package http3
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net"
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"net/http"
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"net/http/httputil"
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"strings"
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"time"
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"github.com/go-gost/gost/pkg/dialer"
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"github.com/go-gost/gost/pkg/logger"
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md "github.com/go-gost/gost/pkg/metadata"
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"github.com/go-gost/gost/pkg/registry"
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"github.com/lucas-clemente/quic-go/http3"
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)
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func init() {
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registry.RegisterDialer("http3", NewDialer)
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}
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type http3Dialer struct {
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client *http.Client
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md metadata
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logger logger.Logger
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options dialer.Options
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}
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func NewDialer(opts ...dialer.Option) dialer.Dialer {
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options := dialer.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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tr := &http3.RoundTripper{
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TLSClientConfig: options.TLSConfig,
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}
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client := &http.Client{
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Timeout: 60 * time.Second,
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Transport: tr,
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}
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return &http3Dialer{
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client: client,
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logger: options.Logger,
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options: options,
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}
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}
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func (d *http3Dialer) Init(md md.Metadata) (err error) {
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return d.parseMetadata(md)
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}
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func (d *http3Dialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (net.Conn, error) {
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token, err := d.authorize(ctx, addr)
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if err != nil {
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d.logger.Error(err)
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return nil, err
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}
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c := &conn{
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cid: token,
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addr: addr,
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client: d.client,
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rxc: make(chan []byte, 128),
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closed: make(chan struct{}),
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md: d.md,
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logger: d.logger,
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}
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go c.readLoop()
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return c, nil
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}
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func (d *http3Dialer) authorize(ctx context.Context, addr string) (token string, err error) {
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url := fmt.Sprintf("https://%s%s", addr, d.md.authorizePath)
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r, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
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if err != nil {
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return
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}
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if d.logger.IsLevelEnabled(logger.DebugLevel) {
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dump, _ := httputil.DumpRequest(r, false)
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d.logger.Debug(string(dump))
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}
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resp, err := d.client.Do(r)
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if err != nil {
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return
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}
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defer resp.Body.Close()
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if d.logger.IsLevelEnabled(logger.DebugLevel) {
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dump, _ := httputil.DumpResponse(resp, false)
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d.logger.Debug(string(dump))
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}
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data, err := io.ReadAll(resp.Body)
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if err != nil {
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return
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}
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if strings.HasPrefix(string(data), "token=") {
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token = strings.TrimPrefix(string(data), "token=")
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}
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if token == "" {
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err = errors.New("authorize failed")
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}
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return
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}
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