Pesto is a library for Python web applications. Its aim is to make writing WSGI web applications easy and fun. Pesto doesn’t constrain you – how you integrate with databases, what templating system you use or how you prefer to lay out your source files is up to you. Above all, pesto is small, well documented and well tested.
Pesto makes it easy to:
- Map any URI to any part of your application.
- Produce unicode aware, standards compliant WSGI applications.
- Interrogate WSGI request information – form variables and HTTP request headers.
- Create and manipulate HTTP headers, redirects, cookies etc.
- Integrate with any other WSGI application or middleware, giving you access to a vast and growing resource.
Contents:
A simple script to run in a CGI environment:
#!/usr/bin/env python
import pesto
from pesto import Response
def handler(request):
return Response([
"<html>",
"<body><h1>Whoa Nelly!</h1></body>",
"</html>",
])
if __name__ == "__main__":
app = pesto.to_wsgi(handler)
pesto.run_with_cgi(app)
A longer example which uses the dispatcher_app mechanism to map URLs to handlers, running through Python’s wsgiref server:
#!/usr/bin/env python
import pesto
from pesto import Response
dispatcher = pesto.dispatcher_app()
recipes = {
'pesto': "Blend garlic, oil, parmesan and pine nuts.",
'toast': "Put bread in toaster. Toast it."
}
@dispatcher.match('/', 'GET')
def recipe_index(request):
"""
Display an index of available recipes.
"""
markup = ['<html><body><h1>List of recipes</h1><ul>']
for recipe in sorted(recipes):
markup.append(
'<li><a href="%s">%s</a></li>' % (
show_recipe.url(recipe=recipe),
recipe
)
)
markup.append('</ul></body></html>')
return Response(markup)
@dispatcher.match('/recipes/<recipe:unicode>', 'GET')
def show_recipe(request, recipe):
"""
Display a single recipe
"""
if recipe not in recipes:
return Response.not_found()
return Response([
'<html><body><h1>How to make %s</h1>' % recipe,
'<p>%s</p><a href="%s">Back to index</a>' % (recipes[recipe], recipe_index.url()),
'</body></html>'
])
if __name__ == "__main__":
from wsgiref import simple_server
httpd = simple_server.make_server('', 8080, dispatcher)
httpd.serve_forever()
Pesto is production ready and used on a wide variety of websites.
To browse or check out the latest development version, visit http://patch-tag.com/r/oliver/pesto. For documentation, visit http://pesto.redgecko.org/.
A google groups mailing list is online at http://groups.google.com/group/python-pesto. Please use this for any questions or comments relating to Pesto.
Pesto is available under the terms of the new BSD licence.