Date: Tue, 16 Feb 1999 08:27:56 -0800 From: dan@wolf.com To: keith@apcs.com.au, questions@FreeBSD.ORG Subject: Re: www cgi forms Message-ID: <19990216082756.A31610@ns.wolf.com> In-Reply-To: <XFMail.990216203707.keith@apcs.com.au>; from Keith Anderson on Tue, Feb 16, 1999 at 08:37:07PM %2B1100 References: <XFMail.990216203707.keith@apcs.com.au>
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> I'm having a problem passing information to my cgi's.
> I made a little test program to echo back anything I sent it (see below eecho.c)
Yep, I see the problem - neither of the 2 recognized methods
of transferring info to a CGI (POST and GET) pass info via
calling arguments.
If you use GET, the form values getted passed through the
QUERY_STRING environment variable. If you use POST the
form values get passwd via stdin with the total length
of all variables passed in the CONTENT_LENGTH environment
variable.
I recommend "CGI Developers Guide" by Eugene Kim. From Chapter
5 of his book, there's a function called ReadParse that does
what you want in Perl. I'll leave it to you to recode it
in C :-)
sub ReadParse {
local (*in) = @_ if @_;
local ($i, $key, $val);
if (&MethGet) {
$in = $ENV{'QUERY_STRING'};
} elsif (&MethPost) {
read(STDIN, $in, $ENV{'CONTENT_LENGTH'});
}
@in = split(/[&;]/, $in);
.... then continues to unescape the escaped values.
Dan Mahoney
dan@wolf.com
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