154 lines
3.3 KiB
Go
154 lines
3.3 KiB
Go
package pxndscvm
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import (
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"bytes"
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"crypto/tls"
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"errors"
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"io"
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"io/ioutil"
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"net"
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"net/http"
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"strconv"
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"sync/atomic"
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"time"
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"golang.org/x/net/proxy"
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"h12.io/socks"
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)
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var failcount = 0
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func (s *Swamp) checkHTTP(sock *Proxy) (string, error) {
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req, err := http.NewRequest("GET", s.GetRandomEndpoint(), bytes.NewBuffer([]byte("")))
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if err != nil {
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return "", err
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}
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headers := make(map[string]string)
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headers["User-Agent"] = s.RandomUserAgent()
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headers["Accept"] = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"
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headers["Accept-Language"] = "en-US,en;q=0.5"
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headers["'Accept-Encoding'"] = "gzip, deflate, br"
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headers["Connection"] = "keep-alive"
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for header, value := range headers {
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req.Header.Set(header, value)
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}
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var dialSocks = socks.Dial("socks" + sock.Proto + "://" +
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sock.Endpoint + "?timeout=" + strconv.Itoa(s.GetValidationTimeout()) + "s")
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var client *http.Client
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var transporter = dialSocks
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if sock.Proto == "none" {
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transporter = proxy.Direct.Dial
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}
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//goland:noinspection GoDeprecation
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client = &http.Client{
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Transport: &http.Transport{
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Dial: transporter,
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DisableKeepAlives: true,
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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TLSHandshakeTimeout: time.Duration(s.GetValidationTimeout()) * time.Second,
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},
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}
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resp, err := client.Do(req)
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if err != nil {
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return "", err
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}
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defer func(Body io.ReadCloser) {
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err := Body.Close()
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if err != nil {
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panic(err)
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}
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}(resp.Body)
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rbody, err := ioutil.ReadAll(resp.Body)
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return string(rbody), err
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}
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func (s *Swamp) singleProxyCheck(sock *Proxy) error {
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s.Stats.Checked++
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if _, err := net.DialTimeout("tcp", sock.Endpoint, time.Duration(s.GetValidationTimeout())*time.Second); err != nil {
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s.badProx.Check(sock)
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return err
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}
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resp, err := s.checkHTTP(sock)
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if err != nil {
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s.badProx.Check(sock)
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return err
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}
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if newip := net.ParseIP(resp); newip == nil {
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s.badProx.Check(sock)
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return errors.New("bad response from http request: " + resp)
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}
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sock.ProxiedIP = resp
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return nil
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}
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func (sock *Proxy) validate() {
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var sversions = []string{"4", "4a", "5"}
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s := sock.parent
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if s.useProx.Check(sock) {
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s.dbgPrint(ylw + "useProx ratelimited: " + sock.Endpoint + rst)
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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return
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}
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// determined as bad, won't try again until it expires from that cache
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if s.badProx.Peek(sock) {
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s.dbgPrint(ylw + "badProx ratelimited: " + sock.Endpoint + rst)
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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return
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}
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// try to use the proxy with all 3 SOCKS versions
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var good = false
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for _, sver := range sversions {
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if s.Status == Paused {
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return
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}
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sock.Proto = sver
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if err := s.singleProxyCheck(sock); err == nil {
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s.dbgPrint(grn + "verified " + sock.Endpoint + " as SOCKS" + sver + rst)
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good = true
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break
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}
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}
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if !good {
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if failcount > 100 {
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s.dbgPrint(ylw + "failed to verify ~100 proxies, last: " + sock.Endpoint)
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failcount = 0
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}
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sock.TimesBad++
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s.badProx.Check(sock)
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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return
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}
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sock.TimesValidated++
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sock.LastVerified = time.Now()
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atomic.StoreUint32(&sock.lock, stateUnlocked)
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switch sock.Proto {
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case "4":
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go s.Stats.v4()
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s.ValidSocks4 <- sock
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case "4a":
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go s.Stats.v4a()
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s.ValidSocks4a <- sock
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case "5":
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go s.Stats.v5()
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s.ValidSocks5 <- sock
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}
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}
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