/*
* Copyright 2022 Justin Reichardt
*
* This file is part of viddown.
*
* fedset is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* viddown is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with fedset. If not, see .
*/
package main
import (
"encoding/json"
"flag"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
"path"
"strconv"
"strings"
)
const template = `
Download
`
// Used to request an operation (download)
type ops struct {
URL string
Res chan string
}
// List of the operations currently being worked on
var currentWork map[int]string
// program configurations
var config struct {
// Where files should be saved
saveLocation string
// Where to find youtube-dl program, must be full name
youtubedll string
// The port the server listens on
port int
}
// Global channel to send operation requests to
var opsc = make(chan ops)
// handleRequest handles http requests
func handleRequest(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodGet && r.URL.Path == "/currentwork" {
list, err := json.Marshal(currentWork)
if err != nil {
log.Panic(err)
}
w.Write(list)
return
} else if r.Method == http.MethodGet {
log.Print("New Get request: " + r.URL.Path)
} else if r.Method == http.MethodPost {
r.ParseForm()
go func() {
var o ops
o.URL = r.FormValue("URL")
opsc <- o
}()
} else {
}
// Modify template and send it to the requester
var insert string
for _, url := range currentWork {
insert += "
" + url
}
temp := strings.Replace(template, "currentWork", insert, 1)
io.WriteString(w, temp)
}
func downloadVid(r *http.Request) {
}
// operationHandler waits for operation requests and initiates them
func operationHandler() {
// Simple index for sorting video work
for i := 0; true; i++ {
o := <-opsc
log.Print("Start Downloading: " + o.URL)
// Spin off a go routine to handle a download so the handler can continue to receive requests
go func() {
// Create a unique directory to download the video in
dir := path.Join(config.saveLocation, ".viddown", strconv.Itoa(i))
os.MkdirAll(dir, 0755)
// Build the download command
cmd := exec.Command(config.youtubedll, o.URL)
cmd.Dir = dir + "/"
currentWork[i] = o.URL // Adds the URL to list of current work
output, err := cmd.CombinedOutput()
log.Print("Finished: " + o.URL)
if err != nil {
log.Print("Failed to download")
log.Print(err)
}
log.Print(string(output))
delete(currentWork, i) // Remove the URL from list of current work
// Clean up directory
files, err := ioutil.ReadDir(dir + "/")
if err != nil {
log.Print(err)
}
for _, file := range files {
log.Print("Moving: " + file.Name())
err := os.Rename(dir+"/"+file.Name(), file.Name())
if err != nil {
log.Print(err)
log.Print("Failed to move: " + dir + "/" + file.Name() + " to: " + file.Name())
}
}
err = os.RemoveAll(dir)
if err != nil {
log.Print("Failed to remove: " + dir)
}
}()
}
log.Fatal("Exited operationsHandler")
}
// handleConfigs configures the program at start, handling any flags or env variables
func handleConfigs() {
flag.StringVar(&config.saveLocation, "o", "./", "The output location for videos")
flag.StringVar(&config.youtubedll, "y", "youtube-dl", "The full location of youtube-dl")
flag.IntVar(&config.port, "p", 8080, "The port the server listens on")
flag.Parse()
log.Println("Downloading files to: " + config.saveLocation)
}
func main() {
handleConfigs()
// initialize currentWork with a blank map
currentWork = make(map[int]string)
// Create the work directory
os.MkdirAll(path.Join(config.saveLocation, ".viddown"), 0755)
// Start the operations handler
go operationHandler()
// Start the http server
handler := http.HandlerFunc(handleRequest)
http.Handle("/", handler)
log.Printf("Starting server on " + strconv.Itoa(config.port))
http.ListenAndServe(":"+strconv.Itoa(config.port), nil)
}