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34a37b807a
right version this time. Thanks, Ping! (This was from SF patch #494582, "\index -> \indexii" version.)
62 lines
2.6 KiB
TeX
62 lines
2.6 KiB
TeX
\section{\module{cgitb} ---
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Traceback manager for CGI scripts}
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\declaremodule{standard}{cgitb}
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\modulesynopsis{Configurable traceback handler for CGI scripts.}
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\moduleauthor{Ka-Ping Yee}{ping@lfw.org}
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\sectionauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
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\versionadded{2.2}
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\index{CGI!exceptions}
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\index{CGI!tracebacks}
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\index{exceptions!in CGI scripts}
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\index{tracebacks!in CGI scripts}
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The \module{cgitb} module provides a special exception handler for CGI
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scripts. After this module is activated, if an uncaught exception occurs,
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a detailed, formatted report will be sent to the Web browser. The report
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includes a traceback showing excerpts of the source code for each level,
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as well as the values of the arguments and local variables to currently
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running functions, to help you debug the problem. Optionally, you can
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save this information to a file instead of sending it to the browser.
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To enable this feature, simply add one line to the top of your CGI script:
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\begin{verbatim}
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import cgitb; cgitb.enable()
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\end{verbatim}
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The options to the \function{enable()} function control whether the
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report is displayed in the browser and whether the report is logged
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to a file for later analysis.
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\begin{funcdesc}{enable}{\optional{display\optional{, logdir\optional{,
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context}}}}
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This function causes the \module{cgitb} module to take over the
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interpreter's default handling for exceptions by setting the
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value of \code{\refmodule{sys}.excepthook}.
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\withsubitem{(in module sys)}{\ttindex{excepthook()}}
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The optional argument \var{display} defaults to \code{1} and can be set
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to \code{0} to suppress sending the traceback to the browser.
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If the argument \var{logdir} is present, the traceback reports are
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written to files. The value of \var{logdir} should be a directory
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where these files will be placed.
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The optional argument \var{context} is the number of lines of
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context to display around the current line of source code in the
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traceback; this defaults to \code{5}.
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\end{funcdesc}
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\begin{funcdesc}{handler}{\optional{info}}
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This function handles an exception using the default settings
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(that is, show a report in the browser, but don't log to a file).
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This can be used when you've caught an exception and want to
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report it using \module{cgitb}. The optional \var{info} argument
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should be a 3-tuple containing an exception type, exception
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value, and traceback object, exactly like the tuple returned by
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\code{\refmodule{sys}.exc_info()}. If the \var{info} argument
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is not supplied, the current exception is obtained from
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\code{\refmodule{sys}.exc_info()}.
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\end{funcdesc}
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