iptv/helpers/util.js

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const fs = require("fs")
const path = require('path')
const M3U8FileParser = require('m3u8-file-parser')
const axios = require('axios')
const zlib = require("zlib")
const DOMParser = require('xmldom').DOMParser
const urlParser = require('url')
const supportedGroups = [ 'Auto','Business', 'CCTV', 'Classic','Comedy','Documentary','Education','Entertainment', 'Family','Fashion','Food', 'General', 'Health', 'History', 'Hobby', 'Kids', 'Legislative','Lifestyle','Local', 'Movies', 'Music', 'News', 'Quiz','Radio', 'Religious','Sci-Fi', 'Shop', 'Sport', 'Travel', 'Weather', 'XXX' ]
const blacklist = [
'80.80.160.168', // repeats on a loop
'63.237.48.3', // not a live stream
'189.216.247.113', // not working streams
]
let cache = {}
class Playlist {
constructor(data) {
this.attrs = data.attrs
this.items = data.items
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}
getHeader() {
let parts = ['#EXTM3U']
for(let key in this.attrs) {
let value = this.attrs[key]
parts.push(`${key}="${value}"`)
}
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return `${parts.join(' ')}\n`
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}
}
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class Channel {
constructor(data) {
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this.id = data.id || ''
this.name = data.name || ''
this.logo = data.logo || ''
this.group = this._getGroup(data.group)
this.url = data.url
this.title = data.title
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}
_getGroup(groupTitle) {
if(!groupTitle) return ''
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const groupIndex = supportedGroups.map(g => g.toLowerCase()).indexOf(groupTitle.toLowerCase())
if(groupIndex === -1) {
groupTitle = ''
} else {
groupTitle = supportedGroups[groupIndex]
}
return groupTitle
}
toString() {
const info = `-1 tvg-id="${this.id}" tvg-name="${this.name}" tvg-logo="${this.logo}" group-title="${this.group}",${this.title}`
return '#EXTINF:' + info + '\n' + this.url + '\n'
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}
}
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function parsePlaylist(filename) {
const parser = new M3U8FileParser()
const content = readFile(filename)
parser.read(content)
let results = parser.getResult()
let contentMatches = content.match(/^.+(?=#|\n|\r)/g)
let head = contentMatches.length ? contentMatches[0] : null
let attrs = {}
if(head) {
const parts = head.split(' ').filter(p => p !== '#EXTM3U').filter(p => p)
for(const attr of parts) {
let attrParts = attr.split('=')
attrs[attrParts[0]] = attrParts[1].replace(/\"/g, '')
}
}
results.attrs = attrs
return new Playlist({
attrs: results.attrs,
items: results.segments
})
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}
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function createChannel(data) {
return new Channel({
id: data.id,
name: data.name,
logo: data.logo,
group: data.group,
url: data.url,
title: data.title
})
}
async function loadEPG(url) {
const data = await getGzipped(url)
const doc = new DOMParser().parseFromString(data, 'text/xml')
const channelElements = doc.getElementsByTagName('channel')
let channels = {}
for(let i = 0; i < channelElements.length; i++) {
let channel = {}
let channelElement = channelElements[i]
channel.id = channelElement.getAttribute('id')
channel.names = []
for(let nameElement of Object.values(channelElement.getElementsByTagName('display-name'))) {
if(nameElement.firstChild) {
channel.names.push(nameElement.firstChild.nodeValue)
}
}
channel.names = channel.names.filter(n => n)
const iconElements = channelElement.getElementsByTagName('icon')
if(iconElements.length) {
channel.icon = iconElements[0].getAttribute('src')
}
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channels[channel.id] = channel
}
return Promise.resolve({
url,
channels
})
}
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function getGzipped(url) {
const supportedTypes = ['application/x-gzip', 'application/octet-stream']
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return new Promise((resolve, reject) => {
var buffer = []
axios({
method: 'get',
url: url,
responseType:'stream'
}).then(res => {
let stream
if(supportedTypes.indexOf(res.headers['content-type']) > -1) {
let gunzip = zlib.createGunzip()
res.data.pipe(gunzip)
stream = gunzip
} else {
stream = res.data
}
stream.on('data', function(data) {
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buffer.push(data.toString())
}).on("end", function() {
resolve(buffer.join(""))
}).on("error", function(e) {
reject(e)
})
}).catch(e => {
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reject(e)
})
})
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}
function byTitle(a, b) {
var nameA = a.title.toLowerCase()
var nameB = b.title.toLowerCase()
if (nameA < nameB) {
return -1
}
if (nameA > nameB) {
return 1
}
return 0
}
function sortByTitle(arr) {
return arr.sort(byTitle)
}
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function readFile(filename) {
return fs.readFileSync(path.resolve(__dirname) + `/../${filename}`, { encoding: "utf8" })
}
function appendToFile(filename, data) {
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fs.appendFileSync(path.resolve(__dirname) + '/../' + filename, data)
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}
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function createFile(filename, data) {
fs.writeFileSync(path.resolve(__dirname) + '/../' + filename, data)
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}
function getBasename(filename) {
return path.basename(filename, path.extname(filename))
}
function addToCache(url) {
let id = getUrlPath(url)
cache[id] = true
}
function checkCache(url) {
let id = getUrlPath(url)
return cache.hasOwnProperty(id)
}
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function clearCache() {
cache = {}
}
function getUrlPath(u) {
let parsed = urlParser.parse(u)
let searchQuery = parsed.search || ''
return parsed.host + parsed.pathname + searchQuery
}
function validateUrl(channelUrl) {
const url = new URL(channelUrl)
const host = url.hostname
return blacklist.indexOf(host) === -1
}
function skipPlaylist(filename) {
let test_country = process.env.npm_config_country
if (test_country && filename !== 'channels/' + test_country + '.m3u') {
return true;
}
return false;
}
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module.exports = {
parsePlaylist,
sortByTitle,
appendToFile,
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createFile,
readFile,
loadEPG,
createChannel,
getBasename,
addToCache,
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checkCache,
clearCache,
validateUrl,
skipPlaylist
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}