Download SoundCloud Track via SoundCloud API

soundcloud_api_client.py

import mechanize
from lxml import etree
import json


__author__ = "https://github.com/SirFroweey/"


class SoundCloud:
    """
    Provides an minimal interface to SoundCloud API that allows you to download a downloadable track
    given a URL to the soundcloud profile song page.
    """
    HTMLParser = etree.HTMLParser()
    def __init__(self, client_id):
        self.client_id = client_id
        self._build_browser()

    def _build_browser(self):
        self.browser = mechanize.Browser()
        self.browser.set_handle_robots(False)
        self.browser.set_handle_gzip(False)
        self.browser.set_handle_redirect(True)

    def url(self, endpoint):
        return endpoint + "?client_id={client_id}".format(client_id=self.client_id)

    def find_track_id(self, url):
        response = self.browser.open(url)
        tree = etree.parse(response, SoundCloud.HTMLParser)
        try:
            track_url = tree.xpath("//meta[contains(@content, 'https://w.soundcloud.com')]")[0]
        except IndexError:
            track_url = None
        if track_url is not None:
            track_id = track_url.attrib["content"].split("%2Ftracks%2F")[1].split("&")[0]
            return track_id
        return None

    def get_track_info(self, track_id):
        url = self.url(
            "https://api.soundcloud.com/tracks/{track_id}/".format(
                track_id=track_id
                )
        )
        response = self.browser.open(url)
        return json.loads(response.read())

    def download_track(self, track_id):
        url = self.url(
            "https://api.soundcloud.com/tracks/{track_id}/download".format(
                track_id=track_id
            )
        )
        response = self.browser.open(url)
        return response.read()

    def download_song(self, url):
        track_id = self.find_track_id(url)
        if track_id:
            json_data = self.get_track_info(track_id)
            if json_data["downloadable"]:
                # download logic here
                print "[Downloading] raw binary data."
                print self.download_track(track_id)
            else:
                print "[Error] File not available for download."


if __name__ == "__main__":
    CLIENT_ID = "YOUR-CLIENT-ID" # Given after applying for the SoundCloud Developer API.
    soundcloud = SoundCloud(client_id=CLIENT_ID)
    soundcloud.download_song("https://soundcloud.com/ysva/call-me-maybe-vs-ignition")
    print "[Complete]"

how does this work, could you help me downloading some tracks ?