YouTube

node-youtube-dl/YouTube/utils/extractor.ts

@@ -0,0 +1,45 @@
+import { get } from "./request";
+import fs from 'fs'
+
+export function valid_url(url : string): boolean{
+    let valid_url = /^https?:\/\/(youtu\.be\/|(www\.)?youtube\.com\/(embed|watch|v|shorts)(\/|\?))/
+    if(url.search(valid_url) !== -1) return true
+    else return false
+}
+
+export async function getBasicInfo(url : string){
+    if(valid_url(url)){
+        let body = await get(url)
+        var final ={
+            initial_data : yt_initial_data(body)
+        }
+    }
+    else {
+        throw 'Not a Valid YouTube URL'
+        process.exit(1)
+    }
+}
+
+function parse_json(str : string, start_index : number){
+    let matches = 0
+    let result : string = '';
+    if(str[start_index] !== '{') {
+        throw 'Start Index is wrong.'
+        process.exit(1)
+    }
+
+    matches++
+    result += str[start_index]
+    for(let x = start_index + 1; x <= str.length; x++){
+        if(matches === 0) break
+        if(str[x] === '(' || str[x] === '{' || str[x] === '[') matches++
+        if(str[x] === ')' || str[x] === '}' || str[x] === ']') matches--
+        result += str[x]
+    }
+    return JSON.parse(result)
+}
+
+function yt_initial_data(data : string): JSON{
+    let pattern = /ytInitialData\s=\s/
+    return parse_json(data, data.search(pattern) + 16)
+}

node-youtube-dl/YouTube/utils/request.ts

@@ -0,0 +1,10 @@
+import fetch from 'node-fetch'
+
+export async function get (url : string) : Promise<string>{
+    return new Promise(async(resolve, reject) => {
+        let response = await fetch(url)
+
+        if(response.status === 200) resolve(await response.text())
+        else reject(`Got ${response.status} from ${url}`)
+    })
+}

node-youtube-dl/index.ts

@@ -0,0 +1,3 @@
+import { getBasicInfo } from "./YouTube/utils/extractor";
+
+getBasicInfo('https://www.youtube.com/watch?v=V_jHc_n0p9c')