main.py

from flask import send_file, Flask, jsonify
from flask_cors import CORS, cross_origin
from youtube_search import YoutubeSearch
from spotify import SpotifyAPI
import re
import pafy
# import requests
''' do not do pip install pafy, do - pip install -e git+git://github.com/mohamed-challal/pafy.git@develop#egg=pafy '''
app = Flask(__name__)
CORS(app, support_credentials=True)
client_id = '574113ae79c246db956bfc33471fdf0d'
client_secret = '60c1057e87c14c7595044d7a0a51be51'
spotify = SpotifyAPI(client_id, client_secret)

@app.route("/info/<query>")
@cross_origin(supports_credentials=True)
def info(query):
  results = spotify.search(query)
  result_length = len(results['tracks']['items'])
  if result_length == 0:
    pass
  else:
    unsorted_search_results = []
    popularity_index = []
    count = 0
    for result in range(result_length):
      song = results['tracks']['items'][result]['name']
      artist = results['tracks']['items'][result]['album']['artists'][0]['name']
      popularity = results['tracks']['items'][result]['popularity']
      re_string = f"/{song}{artist.title()}"
      redirect = re.sub('[^A-Za-z0-9]+', '', re_string.lower())
      popularity_index.append(popularity)
      unsorted_search_results.append({
        'name': f"{song} - {artist.title()}",
        'popularity': int(popularity)}
      )
      count += 1
  search_results = []
  for x in popularity_index:
    max_index = popularity_index.index(max(popularity_index))
    search_results.insert(-1, unsorted_search_results[max_index])
    popularity_index.pop(max_index)
    unsorted_search_results.pop(max_index)
  top_song = search_results.pop()
  search_results.insert(0, top_song)
  return jsonify(search_results)


@app.route("/intro.pdf")
@cross_origin(supports_credentials=True)
def pdf():
  return send_file('intro.pdf')

@app.route("/")
@cross_origin(supports_credentials=True)
def home():
  return("search on spotify - /info/query<br>get youtube meta data and mp3 - /id/query")

@app.route("/id/<query>")
@cross_origin(supports_credentials=True)
def link(query):
  data = YoutubeSearch(query, max_results=1).to_dict()
  print(data)
  id = data[0]['id']
  url = "www.youtube.com/watch?v=" + id
  audio = pafy.new(url).getbestaudio().url
  """ try:
     requests.get(audio)
  except requests.ConnectionError or urllib3.exceptions.LocationParseError or requests.exceptions.InvalidURL or requests.exceptions.MissingSchema:
     return "The selected song can't be played at the moment" """
  result = ({"audio" : audio, "info": data[0]})
  return jsonify(result)


app.run(host='0.0.0.0',debug=True)