fork from http://code.runnable.com/Upjobg9WQ5IHAAB-/how-to-create-custom-filters-in-jinja2-for-python-and-wsgi
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April 25, 2017 11:58
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How to create custom filters in Jinja2
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| # -*- coding: utf-8 -*- | |
| from wsgiref.simple_server import make_server | |
| from jinja2 import Environment, FileSystemLoader | |
| import time | |
| import sys | |
| # Change default encoding to UTF-8 | |
| # We need to reload sys module first, because setdefaultencoding is available | |
| # only at startup time | |
| reload(sys) | |
| sys.setdefaultencoding('utf-8') | |
| env = Environment(loader=FileSystemLoader('/var/www/static')) | |
| # Filters are functions that are used to convert a value to some other format | |
| # In this example, we're taking an Unix timestamp (number of seconds since 1970) | |
| # and we're converting it to one of the two date/time formats | |
| def format_date_EU(unix_timestamp): | |
| return time.strftime('%d-%m-%Y, %H:%M', time.localtime(unix_timestamp)) | |
| def format_date_US(unix_timestamp): | |
| return time.strftime('%m/%d/%Y, %I:%M %p', time.localtime(unix_timestamp)) | |
| # Adding filters to enviroment to make them visible in the template | |
| env.filters['format_date_EU'] = format_date_EU | |
| env.filters['format_date_US'] = format_date_US | |
| # Load template from file | |
| template = env.get_template('index.html') | |
| # WSGI function that handles HTTP requests to our application | |
| def application(environ, start_response): | |
| start_response('200 OK', [('Content-type', 'text/html; charset=utf-8')]) | |
| # Passing arguments ("date" variable), rendering the template | |
| # | |
| # WSGI applications should return an iterable object | |
| # in this example we use a list of one string | |
| return [template.render(date=time.time()).encode('utf-8')] | |
| # If you want to run a standalone HTTP server | |
| # instead of configuring a WSGI proxy (for instance Apache)... | |
| if __name__ == '__main__': | |
| httpd = make_server('', 8000, application) | |
| httpd.serve_forever() |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | |
| <title>Custom filters - Jinja2</title> | |
| <style type="text/css"> | |
| .main{ | |
| height: 300px; | |
| width: 600px; | |
| background-color: #33b5e5; | |
| margin: auto; | |
| text-align: center; | |
| vertical-align: middle; | |
| font-size: 200%; | |
| border: 1px solid; | |
| display: table-cell; | |
| } | |
| .wrapper{ | |
| margin: auto; | |
| width: 602px; | |
| } | |
| </style> | |
| </head> | |
| <body style="background-color: #47473c; color: white; width= 100%;"> | |
| <div class="wrapper"> | |
| <div class="main"> | |
| {# formating date using our custom filters #} | |
| <p> Date(US format): {{ date | format_date_US }} </p> | |
| <p> Date(EU format): {{ date | format_date_EU }} </p> | |
| </div> | |
| </div> | |
| </body> | |
| </html> |
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