/
client.go
263 lines (222 loc) · 6.94 KB
/
client.go
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package http
import (
"context"
"errors"
"fmt"
"net"
httpgo "net/http"
"strconv"
"strings"
"sync"
"time"
http "github.com/Danny-Dasilva/fhttp"
http2 "github.com/Danny-Dasilva/fhttp/http2"
utls "github.com/Danny-Dasilva/utls"
"golang.org/x/net/proxy"
)
func NewDialer(ja3, userAgent, lang, proxyURL string) (func(ctx context.Context, network, addr string) (net.Conn, error), error) {
var dialer proxy.ContextDialer
dialer = &ctxDialer{Dialer: proxy.Direct}
rt := newRoundTripper(ja3, userAgent, lang, dialer).(*roundTripper)
return rt.dialer.DialContext, nil
}
func NewGoClient(ja3, userAgent, lang, proxyURL string) (*httpgo.Client, error) {
var dialer proxy.ContextDialer
dialer = &ctxDialer{Dialer: proxy.Direct}
if proxyURL != "" {
var err error
dialer, err = newConnectDialer(proxyURL)
if err != nil {
return nil, err
}
}
rt := newRoundTripper(ja3, userAgent, lang, dialer).(*roundTripper)
tr := httpgo.DefaultTransport.(*httpgo.Transport).Clone()
tr.DialContext = rt.dialer.DialContext
return &httpgo.Client{
Transport: tr,
Timeout: 30 * time.Second,
}, nil
}
func NewClient(ja3, userAgent, lang, proxyURL string) (*http.Client, error) {
var dialer proxy.ContextDialer
dialer = &ctxDialer{Dialer: proxy.Direct}
if proxyURL != "" {
var err error
dialer, err = newConnectDialer(proxyURL)
if err != nil {
return nil, err
}
}
return &http.Client{
Transport: newRoundTripper(ja3, userAgent, lang, dialer),
Timeout: 30 * time.Second,
}, nil
}
type ctxDialer struct {
proxy.Dialer
}
func (d *ctxDialer) DialContext(ctx context.Context, network, addr string) (net.Conn, error) {
return proxy.Direct.Dial(network, addr)
}
var errProtocolNegotiated = errors.New("protocol negotiated")
type roundTripper struct {
sync.Mutex
JA3 string
UserAgent string
Language string
cachedConnections map[string]net.Conn
cachedTransports map[string]http.RoundTripper
dialer proxy.ContextDialer
}
func (rt *roundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
chromeVersion := "109"
if idx := strings.Index(rt.UserAgent, "Chrome/"); idx != -1 {
candidate := strings.Split(rt.UserAgent[idx+7:], ".")[0]
if _, err := strconv.Atoi(chromeVersion); err == nil {
chromeVersion = candidate
}
}
req.Header.Set("accept-language", rt.Language)
req.Header.Set("sec-ch-ua", fmt.Sprintf(`"Not A;Brand";v="99", "Google Chrome";v="%s", "Chromium";v="%s"`, chromeVersion, chromeVersion))
req.Header.Set("sec-ch-ua-mobile", "?0")
req.Header.Set("sec-ch-ua-platform", `"Windows"`)
req.Header.Set("user-agent", rt.UserAgent)
addr := rt.getDialTLSAddr(req)
if _, ok := rt.cachedTransports[addr]; !ok {
if err := rt.getTransport(req, addr); err != nil {
return nil, err
}
}
return rt.cachedTransports[addr].RoundTrip(req)
}
func (rt *roundTripper) getTransport(req *http.Request, addr string) error {
switch strings.ToLower(req.URL.Scheme) {
case "http":
rt.cachedTransports[addr] = &http.Transport{DialContext: rt.dialer.DialContext, DisableKeepAlives: true}
return nil
case "https":
default:
return fmt.Errorf("invalid URL scheme: [%v]", req.URL.Scheme)
}
_, err := rt.dialTLS(context.Background(), "tcp", addr)
switch err {
case errProtocolNegotiated:
case nil:
// Should never happen.
panic("dialTLS returned no error when determining cachedTransports")
default:
return err
}
return nil
}
func (rt *roundTripper) dialTLS(ctx context.Context, network, addr string) (net.Conn, error) {
rt.Lock()
defer rt.Unlock()
// If we have the connection from when we determined the httpS
// cachedTransports to use, return that.
if conn := rt.cachedConnections[addr]; conn != nil {
delete(rt.cachedConnections, addr)
return conn, nil
}
rawConn, err := rt.dialer.DialContext(ctx, network, addr)
if err != nil {
return nil, err
}
var host string
if host, _, err = net.SplitHostPort(addr); err != nil {
host = addr
}
//////////////////
spec, err := StringToSpec(rt.JA3, rt.UserAgent)
if err != nil {
return nil, err
}
conn := utls.UClient(rawConn, &utls.Config{ServerName: host, InsecureSkipVerify: true}, // MinVersion: tls.VersionTLS10,
// MaxVersion: tls.VersionTLS13,
utls.HelloCustom)
if err := conn.ApplyPreset(spec); err != nil {
return nil, err
}
if err = conn.Handshake(); err != nil {
_ = conn.Close()
if err.Error() == "tls: CurvePreferences includes unsupported curve" {
//fix this
return nil, fmt.Errorf("conn.Handshake() error for tls 1.3 (please retry request): %+v", err)
}
return nil, fmt.Errorf("uTlsConn.Handshake() error: %+v", err)
}
//////////
if rt.cachedTransports[addr] != nil {
return conn, nil
}
// No http.Transport constructed yet, create one based on the results
// of ALPN.
negotiatedProtocol := conn.ConnectionState().NegotiatedProtocol
switch {
case negotiatedProtocol == http2.NextProtoTLS && addr != "gateway.discord.gg:443":
parsedUserAgent := parseUserAgent(rt.UserAgent)
t2 := http2.Transport{DialTLS: rt.dialTLShttp2,
PushHandler: &http2.DefaultPushHandler{},
Navigator: parsedUserAgent,
}
rt.cachedTransports[addr] = &t2
default:
// Assume the remote peer is speaking http 1.x + TLS.
rt.cachedTransports[addr] = &http.Transport{DialTLSContext: rt.dialTLS}
}
// Stash the connection just established for use servicing the
// actual request (should be near-immediate).
rt.cachedConnections[addr] = conn
return nil, errProtocolNegotiated
}
func (rt *roundTripper) dialTLShttp2(network, addr string, _ *utls.Config) (net.Conn, error) {
return rt.dialTLS(context.Background(), network, addr)
}
func (rt *roundTripper) getDialTLSAddr(req *http.Request) string {
host, port, err := net.SplitHostPort(req.URL.Host)
if err == nil {
return net.JoinHostPort(host, port)
}
return net.JoinHostPort(req.URL.Host, "443") // we can assume port is 443 at this point
}
func newRoundTripper(ja3, userAgent, lang string, dialer ...proxy.ContextDialer) http.RoundTripper {
if len(dialer) > 0 {
return &roundTripper{
dialer: dialer[0],
JA3: ja3,
UserAgent: userAgent,
Language: lang,
cachedTransports: make(map[string]http.RoundTripper),
cachedConnections: make(map[string]net.Conn),
}
}
return &roundTripper{
dialer: &ctxDialer{Dialer: proxy.FromEnvironment()},
JA3: ja3,
UserAgent: userAgent,
Language: lang,
cachedTransports: make(map[string]http.RoundTripper),
cachedConnections: make(map[string]net.Conn),
}
}
const (
chrome = "chrome" //chrome User agent enum
firefox = "firefox" //firefox User agent enum
)
func parseUserAgent(userAgent string) string {
switch {
case strings.Contains(strings.ToLower(userAgent), "chrome"):
return chrome
case strings.Contains(strings.ToLower(userAgent), "firefox"):
return firefox
default:
return chrome
}
}
type contextDialer struct {
proxy.Dialer
}
func (d *contextDialer) DialContext(ctx context.Context, network, addr string) (net.Conn, error) {
return d.Dial(network, addr)
}