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181 lines
5.4 KiB
181 lines
5.4 KiB
# imports {{{ #
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import math
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import random
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import requests
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import os
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import urllib
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import secrets
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import pprint
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import string
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from datetime import datetime
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from django.shortcuts import render, redirect
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from django.http import HttpResponseBadRequest
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# }}} imports #
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TIME_FORMAT = '%Y-%m-%d-%H-%M-%S'
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TRACKS_TO_QUERY = 200
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# generate_random_string {{{ #
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def generate_random_string(length):
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"""Generates a random string of a certain length
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Args:
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length: the desired length of the randomized string
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Returns:
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A random string
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"""
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all_chars = string.ascii_letters + string.digits
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rand_str = "".join(random.choice(all_chars) for _ in range(length))
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return rand_str
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# }}} generate_random_string #
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# token_expired {{{ #
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def token_expired(token_obtained_at, valid_for):
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"""Returns True if token expired, False if otherwise
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Args:
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token_obtained_at: datetime object representing the date and time when the token was obtained
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valid_for: the time duration for which the token is valid, in seconds
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"""
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time_elapsed = (datetime.today() - token_obtained_at).total_seconds()
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return time_elapsed >= valid_for
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# }}} token_expired #
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# index {{{ #
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# Create your views here.
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def index(request):
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return render(request, 'spotifyvis/index.html')
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# }}} index #
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# login {{{ #
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# uses Authorization Code flow
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def spotify_login(request):
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# use a randomly generated state string to prevent cross-site request forgery attacks
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state_str = generate_random_string(16)
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request.session['state_string'] = state_str
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payload = {
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'client_id': os.environ['SPOTIFY_CLIENT_ID'],
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'response_type': 'code',
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'redirect_uri': 'http://localhost:8000/callback',
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'state': state_str,
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'scope': 'user-library-read',
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'show_dialog': False
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}
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params = urllib.parse.urlencode(payload) # turn the payload dict into a query string
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authorize_url = "https://accounts.spotify.com/authorize/?{}".format(params)
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return redirect(authorize_url)
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# }}} login #
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# callback {{{ #
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def callback(request):
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# Attempt to retrieve the authorization code from the query string
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try:
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code = request.GET['code']
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except KeyError:
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return HttpResponseBadRequest("<h1>Problem with login</h1>")
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payload = {
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'grant_type': 'authorization_code',
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'code': code,
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'redirect_uri': 'http://localhost:8000/callback',
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'client_id': os.environ['SPOTIFY_CLIENT_ID'],
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'client_secret': os.environ['SPOTIFY_CLIENT_SECRET'],
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}
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response = requests.post('https://accounts.spotify.com/api/token', data=payload).json()
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# despite its name, datetime.today() returns a datetime object, not a date object
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# use datetime.strptime() to get a datetime object from a string
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request.session['token_obtained_at'] = datetime.strftime(datetime.today(), TIME_FORMAT)
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request.session['access_token'] = response['access_token']
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request.session['refresh_token'] = response['refresh_token']
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request.session['valid_for'] = response['expires_in']
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# print(response)
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return redirect('user_data')
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# }}} callback #
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# user_data {{{ #
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def user_data(request):
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# get user token {{{ #
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token_obtained_at = datetime.strptime(request.session['token_obtained_at'], TIME_FORMAT)
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valid_for = int(request.session['valid_for'])
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if token_expired(token_obtained_at, valid_for):
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req_body = {
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'grant_type': 'refresh_token',
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'refresh_token': request.session['refresh_token'],
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'client_id': os.environ['SPOTIFY_CLIENT_ID'],
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'client_secret': os.environ['SPOTIFY_CLIENT_SECRET']
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}
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refresh_token_response = requests.post('https://accounts.spotify.com/api/token', data=req_body).json()
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request.session['access_token'] = refresh_token_response['access_token']
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request.session['valid_for'] = refresh_token_response['expires_in']
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# }}} get user token #
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auth_token_str = "Bearer " + request.session['access_token']
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headers = {
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'Authorization': auth_token_str
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}
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user_data_response = requests.get('https://api.spotify.com/v1/me', headers = headers).json()
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# store the user_id so it may be used to create model
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request.session['user_id'] = user_data_response['id']
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# create user obj {{{ #
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try:
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user = User.objects.get(user_id=user_data_response['id'])
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except User.DoesNotExist:
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# Python docs recommends 32 bytes of randomness against brute force attacks
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user = User(user_id=user_data_response['id'], user_secret=secrets.token_urlsafe(32))
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request.session['user_secret'] = user.user_secret
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user.save()
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# }}} create user obj #
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context = {
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'user_id': user.user_id,
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'user_secret': user.user_secret,
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}
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# TODO: redirect to API app to parse library or loading page
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# parse_library(headers, TRACKS_TO_QUERY, user)
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return render(request, 'spotifyvis/logged_in.html', context)
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# }}} user_data #
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def admin_graphs(request):
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"""TODO
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"""
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user_id = "polarbier"
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# user_id = "chrisshyi13"
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user_obj = User.objects.get(user_id=user_id)
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context = {
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'user_id': user_id,
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'user_secret': user_obj.user_secret,
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}
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update_track_genres(user_obj)
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return render(request, 'spotifyvis/logged_in.html', context)
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