网易云音乐获取歌单列表

a.md

需要填充：HEADERS，PLAYLIST_ID

ncm-song-list

#!/usr/bin/env ruby

require 'nokogiri'
require 'open-uri'
require 'net/http'
require 'json'

HEADERS = %{XX
XX
}
PLAYLIST_ID = XX

def request_url(id) = "https://music.163.com/playlist?id=#{id}"

def fetch_playlist(playlist_id)
  uri = URI(request_url(playlist_id))
  req = Net::HTTP::Get.new(uri)
  HEADERS.each_line(chomp: true) do |line|
    index = line.index(': ')
    key = line[0...index]
    value = line[(index + 2)..]
    req[key] = value
  end

  res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: uri.scheme == 'https') { |http|
    http.request(req)
  }

  fail if res == nil
  body = res.body
  fail if body == nil

  doc = Nokogiri::HTML(body)
  titles = doc.xpath(%{//div[@id='song-list-pre-cache']//ul[@class='f-hide']/li/a/text()}).map do |x|
    fail if x.content.match /\n/
    x.content
  end
  ids = doc.xpath(%{//div[@id='song-list-pre-cache']//ul[@class='f-hide']/li/a/@href}).map do |url|
    # @type [String]
    url = url.content
    arr = url.scan(/^\/song\?id=([0-9]*)$/)
    arr[0][0]
  end

  # @type [Array<Array<Integer, String>>]
  list = ids.map { |x| x.to_i }.zip(titles)

  list.map { |x| Song.new(x[0], x[1]) }
end

class Song
  attr_accessor :id, :name

  def initialize(id, name)
    @id = id
    @name = name
  end

  def to_json(*args)
    {
      'id' => @id,
      'name' => @name,
    }.to_json(args)
  end
end

list = fetch_playlist(PLAYLIST_ID)
puts list.to_json