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# coding=utf-8 |
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import os |
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from random import uniform as random_uniform |
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from time import sleep |
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from flask import Flask, request, jsonify, json, abort |
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app = Flask(__name__) |
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# Ugly global object but injecting it into the Flask app would require extra |
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# work that isn't worth it for the purpose of this tiny piece of the demo. |
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# Besides, dependency injection has already been demonstrated on the main |
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# server. |
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data = {} |
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def load_data(): |
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path = os.path.realpath(os.path.dirname(__file__)) |
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path = os.path.join(path, 'data.json') |
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with open(path) as fp: |
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result = json.load(fp) |
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return result |
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def get_all_items_by_key(key): |
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""" DRY function to get a full list of items given that list's key. """ |
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skip = int(request.args.get('skip', 0)) |
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limit = int(request.args.get('limit', 10)) |
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return data[key][skip:skip+limit-1] |
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def get_items_by_filter(data_key, comparison_key, comparison_data): |
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""" DRY function to filter items from a list. """ |
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return list(filter(lambda x: x[comparison_key] == comparison_data, |
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data[data_key])) |
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def get_purchases(purchases): |
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""" Generic DRY function to respond to requests for purchases. """ |
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skip = int(request.args.get('skip', 0)) |
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limit = int(request.args.get('limit', 10)) |
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if len(purchases) > 0: |
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return jsonify({'purchases': purchases[skip:skip + limit - 1]}) |
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else: |
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abort(404) |
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@app.route('/api/products') |
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def products(): |
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return jsonify({'products': get_all_items_by_key('products')}) |
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@app.route('/api/products/<int:product_id>') |
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def product(product_id): |
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p = get_items_by_filter('products', 'id', product_id) |
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if len(p) > 0: |
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return jsonify({'product': p[0]}) |
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else: |
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abort(404) |
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@app.route('/api/users') |
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def users(): |
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return jsonify({'users': get_all_items_by_key('users')}) |
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@app.route('/api/users/<username>') |
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def user(username): |
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u = get_items_by_filter('users', 'username', username) |
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if len(u) > 0: |
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return jsonify({'user': u[0]}) |
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else: |
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abort(404) |
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@app.route('/api/purchases/by_user/<username>') |
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def purchases_by_user(username): |
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p = get_items_by_filter('purchases', 'username', username) |
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return get_purchases(p) |
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@app.route('/api/purchases/by_product/<int:product_id>') |
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def purchases_by_product(product_id): |
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p = get_items_by_filter('purchases', 'product_id', product_id) |
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return get_purchases(p) |
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if __name__ == "__main__": |
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data = load_data() |
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app.before_request(lambda: sleep(random_uniform(0.5, 1))) |
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app.run(host='0.0.0.0', port=8085) |
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borfast /
acmemegastore
