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import random
from datetime import datetime
from flask import Flask
from flask import jsonify
from flask import render_template_string
from flask_caching import Cache
app = Flask(__name__)
app.config.from_pyfile("hello.cfg")
cache = Cache(app)
#: This is an example of a cached view
@app.route("/api/now")
@cache.cached(50)
def current_time():
return str(datetime.now())
#: This is an example of a cached function
@cache.cached(key_prefix="binary")
def random_binary():
return [random.randrange(0, 2) for i in range(500)]
@app.route("/api/get/binary")
def get_binary():
return jsonify({"data": random_binary()})
#: This is an example of a memoized function
@cache.memoize(60)
def _add(a, b):
return a + b + random.randrange(0, 1000)
@cache.memoize(60)
def _sub(a, b):
return a - b - random.randrange(0, 1000)
@app.route("/api/add/<int:a>/<int:b>")
def add(a, b):
return str(_add(a, b))
@app.route("/api/sub/<int:a>/<int:b>")
def sub(a, b):
return str(_sub(a, b))
@app.route("/api/cache/delete")
def delete_cache():
cache.delete_memoized("_add", "_sub")
return "OK"
@app.route("/html")
@app.route("/html/<foo>")
def html(foo=None):
if foo is not None:
cache.set("foo", foo)
return render_template_string(
"<html><body>foo cache: {{foo}}</body></html>", foo=cache.get("foo")
)
@app.route("/template")
def template():
return render_template_string(
"""<html><body>foo cache:
{% cache 60, "random" %}
{{ range(1, 42) | random }}
{% endcache %}
</body></html>"""
)
if __name__ == "__main__":
app.run()
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