114 lines
3.0 KiB
Lua
114 lines
3.0 KiB
Lua
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-- YOU NEED THE FOLLOWING FOLDERS: photo, document, video, voice
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-- PLEASE ADJUST YOUR PATH BELOW
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-- Save your bot api key in redis set telegram:credentials!
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local media_download = {}
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local utilities = require('otouto.utilities')
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local bindings = require('otouto.bindings')
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local ltn12 = require('ltn12')
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local HTTPS = require('ssl.https')
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local redis = (loadfile "./otouto/redis.lua")()
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media_download.triggers = {
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'/nil'
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}
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function media_download:download_to_file_permanently(url, file_name)
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local respbody = {}
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local options = {
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url = url,
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sink = ltn12.sink.table(respbody),
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redirect = false
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}
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local response = nil
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response = {HTTPS.request(options)}
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local code = response[2]
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local headers = response[3]
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local status = response[4]
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if code ~= 200 then return false end
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-- TODO: Save, when folder doesn't exist
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-- Create necessary folders in this folder!
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local file_path = "/home/YOURPATH/tmp/"..file_name
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file = io.open(file_path, "w+")
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file:write(table.concat(respbody))
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file:close()
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print("Downloaded to: "..file_path)
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return true
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end
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function media_download:pre_process(msg, self)
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if msg.photo then
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local lv = #msg.photo -- find biggest photo, always the last value
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file_id = msg.photo[lv].file_id
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file_size = msg.photo[lv].file_size
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elseif msg.video then
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file_id = msg.video.file_id
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file_size = msg.video.file_size
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elseif msg.sticker then
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file_id = msg.sticker.file_id
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file_size = msg.sticker.file_size
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elseif msg.voice then
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file_id = msg.voice.file_id
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file_size = msg.voice.file_size
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elseif msg.audio then
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file_id = msg.audio.file_id
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file_size = msg.audio.file_size
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elseif msg.document then
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file_id = msg.document.file_id
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file_size = msg.document.file_size
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else
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return
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end
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if file_size > 19922944 then
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print('File is over 20 MB - can\'t download :(')
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return
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end
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-- Check if file has already been downloaded
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local already_downloaded = redis:sismember('telegram:file_id', file_id)
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if already_downloaded == true then
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print('File has already been downloaded in the past, skipping...')
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return
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end
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-- Saving file to the Telegram Cloud
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local request = bindings.request(self, 'getFile', {
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file_id = file_id
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} )
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-- Getting file from the Telegram Cloud
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if not request then
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print('Download failed!')
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return
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end
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-- Use original filename for documents
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if msg.document then
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file_path = 'document/'..file_id..'-'..msg.document.file_name -- to not overwrite a file
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else
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file_path = request.result.file_path
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end
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-- Construct what we want
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local download_url = 'https://api.telegram.org/file/bot'..cred_data.bot_api_key..'/'..request.result.file_path
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local ok = media_download:download_to_file_permanently(download_url, file_path)
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if not ok then
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print('Download failed!')
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return
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end
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-- Save file_id to redis to prevent downloading the same file over and over when forwarding
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redis:sadd('telegram:file_id', file_id)
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return
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end
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function media_download:action(msg)
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end
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return media_download
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