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Full Discussion: perl cgi script not working
Top Forums Web Development perl cgi script not working Post 302586138 by z1dane on Friday 30th of December 2011 08:40:07 AM
Old 12-30-2011
Hi yifangt,

This line may be the problem:

Quote:
Originally Posted by yifangt
Hello,
8 my $filename = $q->param('/home/yifangt/hello.cgi');
param is used to capture the parameters passed to a cgi script. For example if your cgi script is called test.cgi,

and you ran this script on your web server as

test.cgi?test=1

then, this variable $q->param('test') would be 1.

Since you probably don't have a parameter named '/home/yifangt/hello.cgi', $filename is an uninitialized value, therefore line 9 is an error

Can't use an undefined value as a HASH reference at /usr/lib/cgi-bin/Listing4-2.cgi line 9.

Hope that helps,

Dave
 

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LEARN ABOUT DEBIAN

cgi_destroy

cgi_destroy(3)							     cgi/cgi.h							    cgi_destroy(3)

NAME

       cgi_destroy  - deallocate the data associated with a CGI

SYNOPSIS

       #include <cgi/cgi.h>

       void cgi_destroy (CGI **cgi);

ARGUMENTS

       cgi - a pointer to a pointer to a CGI struct

DESCRIPTION

       cgi_destroy  will  destroy  all	the  data  associated with a CGI, which mostly means the associated HDF and removal of any files that were
       uploaded via multipart/form-data.  (Note that even in the event of a crash, these files will be deleted, as they were unlinked on  creation
       and only exist because of the open file pointer)

RETURN VALUE

       cgi - NULL on output

SEE ALSO

       cgi_debug_init(3),  cgi_parse(3),  cgi_destroy(3),  cgi_js_escape(3),  cgi_html_escape_strfunc(3), cgi_register_strfuncs(3), cgi_output(3),
       parse_rfc2388(3), cgi_url_validate(3), open_upload(3), cgi_cs_init(3), cgi_url_escape_more(3), cgi_html_strip_strfunc(3), cgi_neo_error(3),
       cgi_redirect(3),  cgi_filehandle(3),  cgi_register_parse_cb(3),	cgi_url_escape(3),  cgi_init(3), cgi_redirect_uri(3), cgi_cookie_clear(3),
       cgi_url_unescape(3), cgi_vredirect(3), cgi_display(3),  cgi_html_ws_strip(3),  cgi_error(3),  cgi_cookie_set(3),  cgi_text_html_strfunc(3),
       cgi_cookie_authority

ClearSilver							   12 July 2007 						    cgi_destroy(3)
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