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util.py
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util.py
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import os
import json
import redis
import requests
from config.config import CONFIG_VARS as cvar
from datetime import datetime
def get_cached_data(cache_key):
try:
cached_data = get_cached_value(cache_key)
if cached_data is not None:
return json.loads(cached_data)
except Exception as ex:
print 'get_cached_data, %s: %s' % (cache_key, ex)
def set_cached_data(cache_key, data, expires=300):
try:
set_cached_value(cache_key, json.dumps(data), expires)
except Exception as ex:
print 'set_cached_data, %s: %s' % (cache_key, ex)
def get_cached_value(cache_key):
try:
return get_cache_db().get(cache_key)
except Exception as ex:
print 'get_cached_value, %s: %s' % (cache_key, ex)
def set_cached_value(cache_key, value, expires=300):
try:
get_cache_db().setex(cache_key, value, expires)
except Exception as ex:
print 'set_cached_value, %s: %s' % (cache_key, ex)
def get_cache_db():
redis_url = os.getenv('REDISTOGO_URL', 'redis://localhost:6379')
return redis.from_url(redis_url)
def get_date(date_str):
try:
if date_str:
return datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%SZ')
except:
return None
def get_template(template_name, context):
try:
template = fetch_template(template_name)
if template:
from jinja2 import Environment, PackageLoader
env = Environment(loader=PackageLoader('main', 'templates'))
env.variable_start_string = '<%='
env.variable_end_string = '%>'
return env.from_string(template).render(context)
except Exception as ex:
print 'get_template %s' % ex
def fetch_template(template_name):
try:
cache_key = 'template:%s' % (template_name)
template = get_cached_value(cache_key)
if not template:
template = requests.get(cvar[template_name]).text
if template:
set_cached_value(cache_key, template, 300)
return template
except Exception as ex:
print 'fetch_template, %s: %s' % (template_name, ex)
def remove_none(data):
if not data:
return
for (k, v) in list(data.items()):
if v is None:
del(data[k])