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\chapter{Writing CGI Scripts in Scheme}\label{cha:cgi-scripts}
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%
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The \ex{cgi-scripts} structure provides functionality useful for
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writing CGI scripts in Scheme.
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\defun{cgi-form-query}{}{data-alist}
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\begin{desc}
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CGI scripts receive their parameters in various ways, depending on
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how they were called (e.g.\ by \ex{GET} method).
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This procedure translates the delivered form data into an alist of
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decoded strings, using the environment variables set by the server
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(\ex{REQUEST\_METHOD}, \ex{QUERY\_STRING} (for a \ex{GET} request),
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\ex{CONTENT\_LENGTH} (for a \ex{POST} request)). So a query string
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like \codex{button=on\&\ob{}reply=Oh,\ob{}\%20yes} becomes an alist
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\codex{(("button" . "on") ("reply" . "Oh, yes"))}
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\ex{Cgi-form-query} only works for \ex{GET} and \ex{POST} methods.
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\end{desc}
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%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: "man"
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%%% End:
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