Sorry, this function is really difficult to explain. Maybe some other time.

Outputs an Expires header for delta from now. delta is a timedelta object or a number of seconds.

Outputs a Last-Modified header for datetime.

Returns a status redirect to the new URL. url is joined with the base URL so that things like `redirect("about") will work properly.

A 302 Found redirect.

A 303 See Other redirect.

A 307 Temporary Redirect redirect.

Converts a standard CGI-style string response into header and output calls.

Imagine you're at /foo?a=1&b=2. Then changequery(a=3) will return /foo?a=3&b=2 -- the same URL but with the arguments you requested changed.

A function decorator to run a long-running function as a background thread.

Outputs basic profiling information at the bottom of each response.