Linux Apache & CGI (Bad Header problem. Why?)

04-25-2007, 04:25 PM

Hi,

I was trying a CGI built with C in Apache2.Firstly, I forgot the
Content-type header and got the error (in apache's error.log):

malformed header from script. Bad header=<html>

Then I modified the code, adding the Content-type line:

printf("Content-type: text/html\n\n");
printf("<html>\n");
printf(" <HEAD>\n");
(...)

compiled, replaced the binary...and I still got:
malformed header from script. Bad header=<html>

I also tried to restart the server, but it was the same.

What's wrong?

04-25-2007, 04:31 PM

On 2007-04-25, Edu <(E-Mail Removed)> wrote:
> What's wrong?

Impossible to say, but is not a problem in Apache.
Davide

--
What you end up with, after running an operating system concept through
these many marketing coffee filters, is something not unlike plain hot
water.
-- Matt Welsh

04-25-2007, 06:21 PM

Edu wrote:
> Hi,
>
> I was trying a CGI built with C in Apache2.Firstly, I forgot the
> Content-type header and got the error (in apache's error.log):
>
> malformed header from script. Bad header=<html>
>
> Then I modified the code, adding the Content-type line:
>
> printf("Content-type: text/html\n\n");
> printf("<html>\n");
> printf(" <HEAD>\n");
> (...)
>
> compiled, replaced the binary...and I still got:
> malformed header from script. Bad header=<html>
>
> I also tried to restart the server, but it was the same.
>
> What's wrong?
>
You need a proper HTTP header. HTTP version 1.1 (the current version) is
defined by RFC2817; you can read it at:
<http://www.ietf.org/rfc/rfc2817.txt>

Note specifically that header lines should end with "\r\n".

Some versions of web servers will allow you to get away with headers of
varying degrees of badness. Some won't.

Robert

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