102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
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package m3u8d
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import (
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"bufio"
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"bytes"
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"context"
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"crypto/tls"
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"encoding/base64"
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"errors"
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"fmt"
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"golang.org/x/net/proxy"
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"net"
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"net/http"
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"net/url"
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"strings"
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)
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func newDialContext(setProxy string) func(ctx context.Context, network, addr string) (net.Conn, error) {
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return func(ctx context.Context, network, addr string) (net.Conn, error) {
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if setProxy == "" {
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return (&net.Dialer{}).DialContext(ctx, network, addr)
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} else if strings.HasPrefix(setProxy, "http") {
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return proxyByHttp(setProxy, ctx, addr)
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} else { // socks5
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urlObj, err := url.Parse(setProxy)
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if err != nil {
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return nil, err
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}
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dialer, err := proxy.FromURL(urlObj, nil)
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if err != nil {
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return nil, err
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}
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return dialer.Dial(network, addr)
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}
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}
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}
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func proxyByHttp(setProxy string, ctx context.Context, to string) (net.Conn, error) {
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// https://github.com/aidenesco/connect/blob/master/proxy.go
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urlObj, err := url.Parse(setProxy)
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if err != nil {
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return nil, err
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}
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var tConn net.Conn
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if strings.HasPrefix(setProxy, "https://") {
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host := urlObj.Host
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_, _, err = net.SplitHostPort(host)
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if err != nil {
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host = host + ":443"
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}
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tConn, err = (&tls.Dialer{}).DialContext(ctx, "tcp", host)
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} else {
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host := urlObj.Host
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_, _, err = net.SplitHostPort(host)
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if err != nil {
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host = host + ":80"
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}
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tConn, err = (&net.Dialer{}).DialContext(ctx, "tcp", host)
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}
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if err != nil {
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return nil, err
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}
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defer func() {
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if err != nil {
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tConn.Close()
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}
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}()
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buf0 := bytes.NewBuffer(nil)
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buf0.WriteString(`CONNECT ` + to + ` HTTP/1.1` + "\r\n")
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if u := urlObj.User; u != nil {
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username := u.Username()
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password, _ := u.Password()
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buf0.WriteString("Proxy-Authorization: Basic " + base64.StdEncoding.EncodeToString([]byte(username+":"+password)) + "\r\n")
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}
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buf0.WriteString("\r\n")
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_, err = tConn.Write(buf0.Bytes())
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if err != nil {
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return nil, err
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}
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bufr := bufio.NewReader(tConn)
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var response *http.Response
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response, err = http.ReadResponse(bufr, nil)
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if err != nil {
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return nil, err
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}
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switch response.StatusCode {
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case http.StatusOK:
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return tConn, nil
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case http.StatusProxyAuthRequired:
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return nil, errors.New("connect: invalid or missing \"Proxy-Authorization\" header")
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default:
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return nil, fmt.Errorf("connect: unexpected CONNECT response status \"%s\" (expect 200 OK)", response.Status)
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}
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}
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