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main.go
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main.go
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package main
import (
"encoding/json"
"fmt"
"github.com/go-telegram-bot-api/telegram-bot-api"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"strings"
"time"
)
const (
URL = "api2.online-convert.com/jobs"
BOTAPI = "TELEGRAM_BOT_API_KEY_HERE"
DEBUG = true
APICONVERTER = "ONLINE-CONVERTER_API_KEY_HERE"
)
func main() {
fmt.Printf("--- OPUS2AUDIO ---\n" +
"Author: Domenico (DLion) Luciani\n" +
"Site: https://domenicoluciani.com\n" +
"License: MIT\n")
bot, err := tgbotapi.NewBotAPI(BOTAPI)
if err != nil {
log.Panic(err)
}
if DEBUG {
log.Printf("Authorized on account %s", bot.Self.UserName)
}
u := tgbotapi.NewUpdate(0)
u.Timeout = 60
updates, err := bot.GetUpdatesChan(u)
if err != nil {
log.Panicln(err)
}
var mJob JsonResponsePost
mFiles := make(JsonResponseGet, 1)
for update := range updates {
//If no messages -> skip
if update.Message == nil {
continue
}
//Only Documet type accepted
if update.Message.Document == nil {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "I need to receive only Document files")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
continue
}
source, err := bot.GetFileDirectURL(update.Message.Document.FileID)
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error on getting file's direct URL")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
if DEBUG {
log.Println("Source: " + source)
}
payload := strings.NewReader("{\"input\":[{\"type\":\"remote\",\"source\":\"" + source + "\"}],\"conversion\":[{\"category\":\"audio\",\"target\":\"ogg\"}]}")
client := &http.Client{}
req, err := http.NewRequest("POST", "http://"+URL, payload)
req.Header.Add("x-oc-api-key", APICONVERTER)
req.Header.Add("content-type", "application/json")
req.Header.Add("cache-control", "no-cache")
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error on the POST request to online-converter")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
res, err := client.Do(req)
defer res.Body.Close()
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error doing the POST request")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
body, err := ioutil.ReadAll(res.Body)
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error on the reading the body's response POST request")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
err = json.Unmarshal(body, &mJob)
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error decoding the POST response's json")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
//Warn the user
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Request taken, please wait...")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
//Wait 5 seconds
time.Sleep(5000 * time.Millisecond)
req, err = http.NewRequest("GET", "http://"+string(URL)+"/"+string(mJob.ID)+"/output", nil)
req.Header.Add("x-oc-api-key", APICONVERTER)
req.Header.Add("content-type", "application/json")
req.Header.Add("cache-control", "no-cache")
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error on the GET request to online-converter")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
if DEBUG {
log.Println("URL GET: https://" + string(URL) + "/" + string(mJob.ID) + "/output")
}
res, err = client.Do(req)
defer res.Body.Close()
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error doing the GET request")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
body, err = ioutil.ReadAll(res.Body)
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error on the reading the GET response's body")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
err = json.Unmarshal(body, &mFiles)
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error decoding the GET response's json")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
if DEBUG {
log.Printf("URI: %s\nSIZE: %d\n", mFiles[0].URI, mFiles[0].Size)
}
out, err := os.Create("tmpFiles/" + mFiles[0].ID + ".ogg")
defer out.Close()
if err != nil {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error on create a new file on the local disk")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Panicln(err)
}
//Download file
resp, err := http.Get(mFiles[0].URI)
defer resp.Body.Close()
if err != nil {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error getting the result from the URI")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Println(err)
}
io.Copy(out, resp.Body)
//Send file
result := tgbotapi.NewAudioUpload(update.Message.Chat.ID, "tmpFiles/"+mFiles[0].ID+".ogg")
result.Duration = 20 //20 seconds
result.BaseFile.BaseChat.ReplyToMessageID = update.Message.MessageID
bot.Send(result)
//Remove tmpFile
if _, err := os.Stat("tmpFiles/" + mFiles[0].ID + ".ogg"); err == nil {
err = os.Remove("tmpFiles/" + mFiles[0].ID + ".ogg")
if err != nil && DEBUG {
msg := tgbotapi.NewMessage(update.Message.Chat.ID, "Error getting the result from the URI")
msg.ReplyToMessageID = update.Message.MessageID
bot.Send(msg)
log.Panicln("Error on deleting tmpFile")
}
}
}
}