Implementation of the WSGI application interface.

Instances of IServlet are WSGI applications.

Calls event call with environ and start_response, which may return (status_headers, app_iter) and thus abort the rest of the call.

'Runs' the request.

This typically just calls awake(), respond() and sleep(). Error handlers could be added here by subclasses.

Wrapped as event (wrapped methods call start_method_name and end_method_name).

Called at beginning of request.

SHOULD NOT produce output. If call_setup is true then .setup() will be called. SitePage classes (that is, abstract subclasses of Servlet) should override this method and not setup.

Wrapped as event.

Also called at beginning of requests.

Subclasses do not need to call the superclass implementation. This is where individual (non-abstract) servlets typically do their setup.

Called after .awake(), this typically produces the body of the response.

Some components may intercept this method (e.g., components that want to take over the body of the response, like templating components). Wrapped as event.

Called at the end of a request, to clean up resources.

Called regardless of exceptions in .awake() or .respond(), so implementations should be careful not to assume all resources have been successfully set up. Like awake this calls .teardown() if call_teardown is true; abstract classes should override this method and not teardown.

Wrapped as event.

Resource cleanup at the end of request.

Subclasses do not need to call the superclass implementation.

Creates the named cookie in the response.

expires can be:

• ONCLOSE (default: expires when browser is closed)
• NOW (for immediate deletion)
• NEVER (some time far in the future)
• A integer value (expiration in seconds)
• A time.struct_time object
• A string that starts with + and describes the time, like +1w (1 week) or +1b (1 month)

Sets the named header; overwriting any header that previously existed.

The Status header is specially used to change the response status.

Adds the named header, appending to any previous header that might have been set.

Writes the objects.

None is written as the empty string, and unicode objects are encoded with UTF-8.

Redirects to the given URL. If the URL is relative, then it will be resolved to be absolute with respect to self.app_url.

The status is 303 by default; a status keyword argument can be passed to override this.

Other variables are appended to the query string, e.g.:

self.redirect('edit', id=5)

Will redirect to edit?id=5