3.18 Debugging HTTP servers

The library library(http/http_error) defines a hook that decorates uncaught exceptions with a stack-trace. This will generate a 500 internal server error document with a stack-trace. To enable this feature, simply load this library. Please do note that providing error information to the user simplifies the job of a hacker trying to compromise your server. It is therefore not recommended to load this file by default.

The example program calc.pl has the error handler loaded which can be triggered by forcing a divide-by-zero in the calculator.