In Production Mode the End User sees only simple error messages that do not reveal the internal details of your program. In this section we will explain in more detail how to
get information on errors that happened in Production Mode and how to let
heitml know who is allowed to work in Debugging Mode and who works only in Production Mode.
Gathering Information from Production Mode
heitml logs errors in the log file of the Web Server (UNIX versions
only). Also, you can configure the parameter
heitmldebugdir for the Apache Web Server) specifying a directory name where
debugging files should be stored. For each runtime error that occurs,
heitml stores a debug file in this directory. The name of the file contains the date and time when the error occurred. The debug file contains all the usual heitml
runtime error information, and additional information as to when the error happened, including which IP and User Name the request came from.
It is useful to make
debugdir a password protected subdirectory of
your Web Server to ensure that you can obtain the debugging information
Switching between debugging and production mode
heitml does User Identification by IP number or User Name.
heitmldebugip for Apache) you can allow certain IP numbers to access a Web
Site in Debugging Mode. Here you can give a list of complete IP numbers
separated by semicolons, with no whitespace in between. You can also supply the special word
localhost, which allows Browsers or Proxies on the Server to
access the Web Site in Debugging Mode.
Identification by IP numbers can work quite well. However if you do not
have control over the network connection, it is possible for someone to fake IP numbers. Also, IP number identification does not work precisely enough when running on multi-user machines, because everyone on such machines receive the same permissions.
The second possibility is identification by User Names. In this
case the Web Site must be password protected. This causes
your Browser to prompt you for a Username and Password.
heitmldebuguser for Apache) you can specify a list of Users
who are allowed to access the Web Site in Debugging Mode.
Usernames must be separated by semicolons, with no whitespace
All configuration options described here go into the
heitml configuration file or the Web Server configuration
file. See the installation pages for more detail.
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