Ruby - SoundCloud Downloader

This library provides three things :

A way to download any Soundcloud sound in a temporary directory to stream the mp3 file
A way to download any Soundcloud sound in a less temporary fashion so you can save the mp3 file
A way to display a progress bar as the retrieving of the Souncloud stream is, well, progressing.

The only thing you need are a SoundCloud CLIENT_ID and the stream URL of a track which is fetchable through the API

soundcloud-downloader -v
# => 1.2.1

soundcloud-downloader --changelog
# V 1.2.1 : #resolve now returns the URL everytime, changed the way of downloading with rails
# V 1.2.0 : #resolve now returns the URL everytime, download! method for Rails
# V 1.1.0 : Fixes and Ruby download! method
# V 1.0.0 : Release

Installation

$ gem install soundcloud-downloader

Or in Gemfile

$ gem soundcloud-downloader

Usage

require 'soundcloud-downloader'

Ruby

downloader = SoundCloud::Downloader::Client.new(client_id: SOUNDCLOUD_CLIENT_ID, path: 'download')
downloader.download(url, { file_name: "file name you want", display_progress: true })
# Will display a download progress bar and download the file in the 'download' directory

Rails 4

require "open-uri"

class SomeController < ApplicationController
  def some_action
    downloader = SoundCloud::Downloader::Client.new(client_id: SOUNDCLOUD_CLIENT_ID)
    url = downloader.resolve("https://api.soundcloud.com/tracks/147462663/stream")

    # Makes the browser download the file
    send_data open(url).read,
      :type => "audio/mpeg",
      :disposition => "attachment; filename=\"#{filename}.mp3\""

  end
end

Advanced

Example 1 : Get sounds and stores them in temporary files

# We instanciate the downloader client (don't forget to replace SOUNDCLOUD_CLIENT_ID with your real Client id)
downloader = SoundCloud::Downloader::Client.new(client_id: SOUNDCLOUD_CLIENT_ID)

# The downloader requires you to give it a Soundcloud API download_url
downloader.resolve("https://api.soundcloud.com/tracks/147462663/stream")

# This will retrieve the previous URL's content and store it in a temporary file
file = downloader.load do |length, position, data|
# This will display a progress_bar when downloading the file
SoundCloud::Downloader::Helpers.progress_bar("=", ">", position)
end

puts file # => /tmp/fosdjiofw2343242.mp3

# Here you do your stuff with the file (Play it for example !)

# Delete the temporary files
downloader.end_stream

Example 2 : Get sounds and stores them in a directory

# The path variables is the directory in which you want to download your soundcloud files
downloader = SoundCloud::Downloader::Client.new(client_id: SOUNDCLOUD_CLIENT_ID, path: 'downloads')

downloader.resolve("https://api.soundcloud.com/tracks/147462663/stream")
file = downloader.load "myMusicFile" do |length, position, chunk|
SoundCloud::Downloader::Helpers.progress_bar("=", ">", position)
end

puts file # => downloads/myMusicFile.mp3

# BE CAREFUL ! The following line will DELETE the last downloaded file, you might not want to do that
downloader.end_stream :force

# You can download as many files as you want :
downloader.resolve("https://api.soundclound.com/blabla/other_url")
file2 = downloader.load "myOtherMusicFile"
downloader.resolve("https://api.soundclound.com/blabla/yet_another_other_url")
file3 = downloader.load "myOtherMusicFile3"