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Document contains no data

Posted on 1997-11-04
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Last Modified: 2013-12-25
Please help me,
I wrote a cgi:

#!/usr/bin/perl

print "Content-type: text/html\n\n";

#full path
$file="/home/httpd/html/dane.html";

#require cgi-lib.pl
require "cgi-lib.pl";

&ReadParse;

#otwiera plik i dostawia do niego nowe dane
open(DB,">>$file");

#drukuje informacje
print DB "\n<B>$in{'name'}<BR>";
print DB "\n$in{'location'}</B><BR>";
print DB "\n$in{'comments'}<BR><HR>\n";

close DB;

And html file:

<html>
<head>
<title>Test</title>
</head>

<form method=post action="../cgi-bin/dane.pl">
Nazwa:<input name="name"><br>
Adres:<input name="location"><br>
<BR>Komentarz:<br>
<textarea name="comments">
</textarea>
<input type="submit">
</form>

<b>Show me entries:</b>
<BR>

When I submit this form I receiving a
"Documen contains no data"
message. But when I reload form page I see new entries.
dane.pl has 755
dane.html has 666

please help me,
JerzyO.
0
Comment
Question by:jerzyk
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2 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 1831066
why don't you try putting some data in the document:
print "Content-type: text/html\n\n";
print qq(<html><head><title>document</title></head>\n <body>form submitted</body></html>\n);

0
 

Accepted Solution

by:
steve_howell earned 200 total points
ID: 1831067
Ozo's right: you're getting "document has no data," because you never wrote data to standard output in your CGI program.  A web server that supports CGI will display to the browser only what your program writes to standard output.  Your technique of writing a new HTML file every time doesn't really fit the CGI model, although you could have your CGI program write a new version of that file and immediately write it to standard output.

If, for some reason, you don't want the screen to change when you hit your page, you can send an HTTP header like this from your program:

Status: 204 No Content\n\n

When the browser sees this, it will know that your program is just doing something on the back end, and you don't want to redraw anything.


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