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downloader.coffee

src/
URI = require 'URIjs'
request = require 'request'

Downloader

Retrieves data from Pandora.com and handles network errors.


module.exports = class Downloader
A GitHub Gist that contains an updated cookie allowing access to
'login-only' visible data.


  CONFIG_URL = """
    https://gist.github.com/ustasb/596f1ee96d03463fde77/raw/pandata_config.json
    """
The cached cookie.


  @cookie: null
Downloads and reads a page from a URL, then executes a callback on the
data.


  @read_page: (url, callback) =>
    @get_cookie =>
      @download url, @cookie, (data) =>
        return callback(data)
Downloads a page, handles errors, and executes a callback on the data.


  @download: (url, cookie, callback) =>
    jar = request.jar()
    jar.add(request.cookie(cookie))
Normalize URL


    url = new URI(url).normalize().toString()

    request {uri: url, jar: jar}, (error, response, body) ->
      if error
        console.log """The network request for:\n  #{url}\n
          returned an error:\n  #{error.message}"
          Please try again later or update Pandata.
          Sorry about that!\n\nFull error:"""
        console.log error.stack
      else
        callback(body)
Sets @cookie to the cached cookie, or retrieves it if it's not already
there, and executes the callback


  @get_cookie: (callback) =>
    unless @cookie?
      @download_cookie (cookie) =>
        @cookie = cookie
        return callback()
    else return callback()
Fetches an up-to-date cookie based on the CONFIG_URL and
executes the callback on the parsed response


  @download_cookie: (callback) =>
    @download CONFIG_URL, '', (body) =>
      callback(JSON.parse(body).cookie)


generated Sun May 18 2014 23:57:48 GMT-0500 (CDT)