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gen.go
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gen.go
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package gen
import (
"bytes"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"github.com/Bpazy/xraysub/constants"
"github.com/Bpazy/xraysub/util"
"github.com/Bpazy/xraysub/xray"
"github.com/Bpazy/xraysub/xray/protocol"
"github.com/go-resty/resty/v2"
"github.com/schollz/progressbar/v3"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"io"
"io/ioutil"
"net"
"os"
"os/exec"
"os/signal"
"strconv"
"strings"
"sync"
"syscall"
"time"
)
// CmdConfig config for command: xraysub gen
type CmdConfig struct {
Url string // subscription link
OutputFile string // xray-core's configuration path
DetectLatency bool // detect latency to select the best server
DetectThreadNumber int // detect latency threads number
XrayCorePath string // xray-core path, for some case such as: speed test
XraySocksPort int // xray-core listen socks port
XrayHttpPort int // xray-core listen http port
}
var Cfg = &CmdConfig{}
func NewGenCmdRun() func(cmd *cobra.Command, args []string) {
return func(cmd *cobra.Command, args []string) {
c := resty.New()
fmt.Printf("Requesting subscriptions from %s\n", Cfg.Url)
c.SetTimeout(5 * time.Second)
res, err := c.R().Get(Cfg.Url)
util.CheckErr(err)
dst, err := base64.StdEncoding.DecodeString(res.String())
util.CheckErr(err)
uris := strings.Split(strings.TrimSpace(string(dst)), "\n")
links := parseLinks(uris)
xrayCfg := getXrayConfig(links)
if Cfg.DetectLatency {
err := detectLatency(xrayCfg)
util.CheckErr(err)
}
writeFile(xrayCfg, Cfg.OutputFile)
}
}
var xrayCoreProcess *os.Process
func init() {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT, syscall.SIGKILL)
go func() {
s := <-c
log.Infof("Got signal: %s", s.String())
killXrayCoreProcess()
os.Exit(1)
}()
}
func killXrayCoreProcess() {
if xrayCoreProcess != nil {
log.Infof("kill xray-core, PID: %d", xrayCoreProcess.Pid)
util.CheckErr(xrayCoreProcess.Kill())
}
}
// speed test, return the fastest node
func detectLatency(xCfg *xray.Config) error {
fmt.Println("Start detecting servers latency")
if len(xCfg.Outbounds) == 0 {
return errors.New("outbounds empty")
}
// generate inbound and routing rules based on outbound to test latency
var inbounds []*xray.Inbound
var routingRules []*xray.Rule
inboundPorts := randomInboundPorts(xCfg.Outbounds)
for i, outbound := range xCfg.Outbounds {
inbound := getInboundFromOutbound(i, inboundPorts[i])
outbound.Inbound = inbound
inbounds = append(inbounds, inbound)
routingRules = append(routingRules, getRoutingRules(inbound, outbound))
}
oldInbounds := xCfg.Inbounds
xCfg.Inbounds = inbounds
xCfg.Routing.Rules = routingRules
defer func() {
xCfg.Inbounds = oldInbounds
}()
f, err := writeTempConfig(xCfg)
if err != nil {
return err
}
defer os.RemoveAll(f.Name())
cmd := exec.Command(Cfg.XrayCorePath, "-c", f.Name(), "-format=json")
// for:
// 1. xray-core.log
// 2. buffer for check xray-core status
xlf, err := appendXrayCoreLogFile()
if err != nil {
return fmt.Errorf("create xray-core.log error: %w", err)
}
defer util.Closeq(xlf)
buf := new(bytes.Buffer)
w := io.MultiWriter(xlf, buf)
outPipe, err := cmd.StdoutPipe()
util.CheckErr(err)
go func() {
_, err = io.Copy(w, outPipe)
util.CheckErr(err)
}()
if err = cmd.Start(); err != nil {
return fmt.Errorf("exec xray-core error: %w", err)
}
log.Infof("xray-core PID: %d", cmd.Process.Pid)
xrayCoreProcess = cmd.Process
defer killXrayCoreProcess()
// start rendering progress bar
bar := initProgressBar(xCfg)
if err = checkXrayCoreStatus(buf); err != nil {
return err
}
wg := new(sync.WaitGroup)
outboundChan := make(chan *xray.ShadowsocksOutbound)
for i := 0; i < Cfg.DetectThreadNumber; i++ {
wg.Add(1)
go detectWorker(outboundChan, wg, bar)
}
for _, outbound := range xCfg.Outbounds {
outboundChan <- outbound
}
close(outboundChan)
wg.Wait()
fmt.Println()
// filter fasted outbound
fastedOutbound, err := getFastedOutbound(xCfg)
if err != nil {
return err
}
xCfg.Routing.Rules = []*xray.Rule{
{
Type: "field",
OutboundTag: fastedOutbound.Tag,
Port: "0-65535",
},
}
return nil
}
func getFastedOutbound(xCfg *xray.Config) (*xray.ShadowsocksOutbound, error) {
var fastedOutbound *xray.ShadowsocksOutbound
for _, outbound := range xCfg.Outbounds {
if outbound.Latency == nil {
continue
}
if fastedOutbound == nil {
fastedOutbound = outbound
} else if fastedOutbound.Latency.Milliseconds() > outbound.Latency.Milliseconds() {
fastedOutbound = outbound
}
}
if fastedOutbound == nil {
return nil, errors.New("all nodes detectLatency test failed")
} else {
fmt.Printf("Got fastest node \"%s\" with latency %dms\n", fastedOutbound.PrettyComment(), fastedOutbound.Latency.Milliseconds())
}
return fastedOutbound, nil
}
// check xray-core started status
func checkXrayCoreStatus(buf *bytes.Buffer) error {
// wait up to 3 seconds for Xray to start
timeout := time.After(3 * time.Second)
LOOP:
for {
s := buf.String()
select {
case <-timeout:
return errors.New("start xray-core error, please check xray-core's log")
default:
if strings.Contains(s, "started") {
break LOOP
}
time.Sleep(100 * time.Millisecond)
}
}
return nil
}
func initProgressBar(xCfg *xray.Config) *progressbar.ProgressBar {
return progressbar.NewOptions(len(xCfg.Outbounds),
progressbar.OptionSetDescription("\tDetecting"),
progressbar.OptionEnableColorCodes(true),
progressbar.OptionSetTheme(progressbar.Theme{
Saucer: "=",
SaucerHead: ">",
SaucerPadding: " ",
BarStart: "[",
BarEnd: "]",
}))
}
func appendXrayCoreLogFile() (*os.File, error) {
f, err := os.OpenFile("xray-core.log", os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return nil, err
}
return f, err
}
func detectWorker(oc chan *xray.ShadowsocksOutbound, wg *sync.WaitGroup, bar *progressbar.ProgressBar) {
defer wg.Done()
for outbound := range oc {
client := resty.New()
proxy := "http://127.0.0.1:" + strconv.Itoa(outbound.Inbound.Port)
client.SetProxy(proxy)
client.SetTimeout(5 * time.Second)
start := time.Now()
_, err := client.R().Get("https://www.google.com/generate_204")
if err != nil {
log.Errorf("request failed by proxy %s: %+v", proxy, err)
} else {
since := time.Since(start)
outbound.Latency = &since
s := outbound.Settings.Servers[0]
log.Infof("%s:%d cost %dms", s.Address, s.Port, outbound.Latency.Milliseconds())
}
_ = bar.Add(1)
}
}
func randomInboundPorts(outbounds []*xray.ShadowsocksOutbound) []int {
var ports []int
offset := 0
for range outbounds {
for {
p := 40000 + offset
offset++
listenable := portListenable(p)
if listenable {
ports = append(ports, p)
break
}
}
}
return ports
}
func portListenable(p int) bool {
listen, err := net.Listen("tcp", "0.0.0.0:"+strconv.Itoa(p))
if err == nil {
// 端口可用
_ = listen.Close()
return true
}
return false
}
func writeTempConfig(xCfg *xray.Config) (*os.File, error) {
j, err := json.Marshal(xCfg)
if err != nil {
return nil, err
}
f, err := ioutil.TempFile(os.TempDir(), "xray.config.json")
if err != nil {
return nil, fmt.Errorf("create temp file 'xray.config.json' error: %w", err)
}
_, err = f.Write(j)
if err != nil {
return nil, fmt.Errorf("write to temp file 'xray.config.json' error: %w", err)
}
return f, nil
}
func getRoutingRules(inbound *xray.Inbound, outbound *xray.ShadowsocksOutbound) *xray.Rule {
return &xray.Rule{
Type: "field",
InboundTag: []string{inbound.Tag},
OutboundTag: outbound.Tag,
}
}
func getInboundFromOutbound(i int, port int) *xray.Inbound {
return &xray.Inbound{
Tag: "inbound" + strconv.Itoa(i),
Port: port,
Listen: constants.ListenAllAddress,
Protocol: "http",
Sniffing: &xray.Sniffing{
Enabled: true,
DestOverride: []string{"http", "tls"},
},
Settings: &xray.InboundSettings{
Udp: false,
AllowTransparent: false,
},
}
}
// write xray-core's configuration
func writeFile(cfg *xray.Config, path string) {
j, err := json.Marshal(cfg)
util.CheckErr(err)
err = ioutil.WriteFile(path, j, 0644)
util.CheckErr(err)
fmt.Printf("The xray-core's configuration file is saved %s\n", path)
}
func parseLinks(uris []string) []*Link {
var links []*Link
for _, uri := range uris {
p, err := protocol.GetProtocol(uri)
if err != nil {
log.Warn("unrecognized protocol: " + uri)
continue
}
switch p {
case protocol.Shadowsocks:
cfg, err := protocol.ParseShadowsocksUri(uri)
if err != nil {
log.Warn("illegal shadowsocks uri schema: " + uri)
continue
}
links = append(links, &Link{
SsCfg: cfg,
})
case protocol.Vmess:
}
}
return links
}
type Link struct {
SsCfg *protocol.ShadowsocksConfig
}
// build xray-core config
func getXrayConfig(links []*Link) *xray.Config {
return &xray.Config{
Policy: &xray.Policy{
System: xray.System{
StatsOutboundUplink: true,
StatsOutboundDownlink: true,
},
},
Log: &xray.Log{
Access: "",
Error: "",
Loglevel: "warning",
},
Inbounds: getInbounds(),
Outbounds: getOutBounds(links),
Routing: &xray.Routing{
DomainStrategy: "IPIfNonMatch",
DomainMatcher: "linear",
},
}
}
func getOutBounds(links []*Link) []*xray.ShadowsocksOutbound {
var outbounds []*xray.ShadowsocksOutbound
for i, link := range links {
outbounds = append(outbounds, &xray.ShadowsocksOutbound{
BaseOutbound: xray.BaseOutbound{
Tag: "outbound" + strconv.Itoa(i), // 应该测速后选择最合适的设置 tag 为 proxy
Protocol: "shadowsocks",
Comment: link.SsCfg.Comment,
},
Settings: &xray.OutboundSettings{
Servers: []*xray.ShadowsocksServer{
{
Address: link.SsCfg.Hostname,
Method: link.SsCfg.Method,
Ota: false,
Password: link.SsCfg.Password,
Port: link.SsCfg.Port,
Level: 1,
},
},
},
StreamSettings: &xray.StreamSettings{
Network: "tcp",
},
Mux: &xray.Mux{
Enabled: false,
Concurrency: -1,
},
})
}
return outbounds
}
func getInbounds() []*xray.Inbound {
return []*xray.Inbound{
{
Tag: "socks",
Port: Cfg.XraySocksPort,
Listen: constants.ListenAllAddress,
Protocol: "socks",
Sniffing: &xray.Sniffing{
Enabled: true,
DestOverride: []string{"http", "tls"},
},
Settings: &xray.InboundSettings{
Auth: "noauth",
Udp: true,
AllowTransparent: false,
},
},
{
Tag: "http",
Port: Cfg.XrayHttpPort,
Listen: constants.ListenAllAddress,
Protocol: "http",
Sniffing: &xray.Sniffing{
Enabled: true,
DestOverride: []string{"http", "tls"},
},
Settings: &xray.InboundSettings{
Udp: false,
AllowTransparent: false,
},
},
}
}