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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2020 jet tsang zeon-git. All Rights Reserved.
*/
package main
import (
"bufio"
"flag"
"fmt"
"log"
"strings"
"time"
"github.com/antchfx/htmlquery"
"github.com/valyala/fasthttp"
)
type ShortMap map[string]string
var listUrl string
var blockTxt string
var shortenMap map[string]string
var listen string
var reloadURI = "/reload"
var clientHeaderURI = "/header"
var UserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.53 Safari/537.36"
func init() {
const (
urlUsage = "This program will get a list from the url you provide."
blockUsage = "html block to query."
defaultBlock = ""
defaultListen = "localhost:9530"
listenUsage = "TCP address to listen to"
)
flag.StringVar(&listUrl, "url", "https://pastebin.com/raw/9g4msZxC", urlUsage)
flag.StringVar(&listUrl, "u", "https://pastebin.com/raw/9g4msZxC", urlUsage+" (shorthand)")
flag.StringVar(&blockTxt, "block", defaultBlock, blockUsage)
flag.StringVar(&blockTxt, "b", defaultBlock, blockUsage+" (shorthand)")
flag.StringVar(&listen, "listen", defaultListen, listenUsage)
flag.StringVar(&listen, "l", defaultListen, listenUsage+" (shorthand)")
shortenMap = map[string]string{}
}
func main() {
flag.Parse()
go autoLoad()
log.Println("Listening to:", listen)
s := &fasthttp.Server{
Handler: requestHandler,
NoDefaultServerHeader: true,
}
if err := s.ListenAndServe(listen); err != nil {
log.Fatalf("Error in ListenAndServe: %s", err)
}
}
func requestHandler(ctx *fasthttp.RequestCtx) {
strr := string(ctx.RequestURI())
ctx.Response.Header.Add("Server", "jet's relay server")
if strr == reloadURI {
loadData()
fmt.Fprint(ctx, "ok")
ctx.SetStatusCode(fasthttp.StatusAccepted)
return
} else if strr == clientHeaderURI {
fmt.Fprint(ctx, string(ctx.Request.Header.Header()))
ctx.SetStatusCode(fasthttp.StatusAccepted)
return
} else if strings.HasPrefix(strr, clientHeaderURI+"/") {
headerkey := strings.TrimLeft(strr, clientHeaderURI+"/")
log.Println("headerkey", headerkey)
fmt.Fprint(ctx, string(ctx.Request.Header.Peek(headerkey)))
ctx.SetStatusCode(fasthttp.StatusAccepted)
return
} else if strings.HasPrefix(strr, "/yt/") {
var req fasthttp.Request
var resp fasthttp.Response
ythash := strings.TrimLeft(strr, "/yt/")
req.Header.Add("User-Agent", UserAgent)
req.Header.Add("Referer", "https://www.youtube.com")
req.SetRequestURI("https://www.youtube.com/watch?v=" + ythash)
fasthttp.Do(&req, &resp)
ytbody := string(resp.Body())
m3u8 := GetBetweenStr(ytbody, "hlsManifestUrl\":\"", "\"},\"heart")
ctx.Redirect(m3u8, 302)
defer func() {
fasthttp.ReleaseRequest(&req)
req.ConnectionClose()
resp.ConnectionClose()
}()
return
}
if relayUrl, exist := shortenMap[string(ctx.Path())]; exist {
var req fasthttp.Request
ctx.Request.Header.CopyTo(&req.Header)
req.SetRequestURI(relayUrl)
req.Header.SetBytesV("Host", req.Host())
ctx.URI().QueryArgs().VisitAll(func(key []byte, value []byte) {
req.URI().QueryArgs().AddBytesKV(key, value)
})
defer fasthttp.ReleaseRequest(&req)
fasthttp.Do(&req, &ctx.Response)
} else {
ctx.Error("err", 404)
}
}
func autoLoad() {
for {
loadData()
time.Sleep(time.Hour)
}
}
func loadData() {
log.Println("Loading data.", listUrl)
var code string
if blockTxt != "" {
doc, err := htmlquery.LoadURL(listUrl)
if err != nil {
log.Println("url err:", listUrl)
return
}
found, err := htmlquery.QueryAll(doc, blockTxt)
if err != nil {
log.Println("block not found", err)
return
}
if len(found) == 0 {
log.Println("No elements found")
return
}
code = htmlquery.InnerText(found[0])
} else {
var dst []byte
statusCode, byteCode, err := fasthttp.Get(dst, string(listUrl))
if err != nil || statusCode != fasthttp.StatusOK {
log.Printf("HTTP request failed with status code %d\n", statusCode)
return
}
code = string(byteCode)
}
scanner := bufio.NewScanner(strings.NewReader(code))
for scanner.Scan() {
maplist := strings.Split(scanner.Text(), "#")
if len(maplist) < 2 {
log.Println("Invalid data format:", scanner.Text())
continue // Skip this iteration as the data format is not valid
}
shortenMap[maplist[0]] = maplist[1]
}
log.Println("URLs mapped.")
}
func GetBetweenStr(str, start, end string) string {
n := strings.Index(str, start) + len(start)
if n == -1 {
n = 0
}
str = string([]byte(str)[n:])
m := strings.Index(str, end)
if m == -1 {
m = len(str)
}
str = string([]byte(str)[:m])
return str
}
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