YoutubeDownloader

TechManDylan

Feb 24th, 2023

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local http = require("socket.http")
local ltn12 = require("ltn12")
local lfs = require("lfs")
local lx = require("lxp.lom")
function sendHttpRequest(url)
local response_body = {}
local res, code, response_headers = http.request{
url = url,
method = "GET",
headers = {
["User-Agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"
},
sink = ltn12.sink.table(response_body)
}
local response = table.concat(response_body)
return response
end
function parseVideoPage(videoPage)
local tree = lx.parse(videoPage)
local videoId = nil
for _, elem in ipairs(tree) do
if elem.tag == "div" and elem.attr.class == "watch-main-col" then
for _, child in ipairs(elem) do
if child.tag == "div" and child.attr.id == "watch7-content" then
for _, grandchild in ipairs(child) do
if grandchild.tag == "div" and grandchild.attr.id == "watch7-player" then
videoId = grandchild.attr["data-video-id"]
end
end
end
end
end
end
local videoUrl = "https://www.youtube.com/watch?v=" .. videoId
return videoId, videoUrl
end
function downloadVideo(videoUrl)
local response_body = {}
local res, code, response_headers = http.request{
url = videoUrl,
method = "GET",
headers = {
["User-Agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"
},
sink = ltn12.sink.table(response_body)
}
local response = table.concat(response_body)
return response
end
function saveVideoToFile(videoData, filename)
local file, err = io.open(filename, "wb")
if not file then
print("Error opening file:", err)
return
end
file:write(videoData)
file:close()
end
-- main program
print("Enter the URL of the YouTube video you want to download:")
local videoPageUrl = io.read("*line")
local videoPage = sendHttpRequest(videoPageUrl)
local videoId, videoUrl = parseVideoPage(videoPage)
local videoData = downloadVideo(videoUrl)
saveVideoToFile(videoData, "video.mp4")

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