Date: Mon, 25 Mar 2002 20:04:40 +0100 From: Paul Everlund <tdv94ped@cs.umu.se> To: Drew Tomlinson <drew@mykitchentable.net> Cc: Dan Nelson <dnelson@allantgroup.com>, Walter Hop <walter@binity.com>, smorton@acm.org, questions@FreeBSD.ORG Subject: Re: Showing Uptime Via webpage Message-ID: <3C9F74C8.9165C0F1@cs.umu.se> References: <Pine.GSO.4.44L0.0203232239500.14624-100000@shell.core.com> <3C9E0754.2010104@verizon.net> <006201c1d423$ee01be00$f82a6ba5@lc.ca.gov> <200203251840.33315@silver.dt1.binity.net> <007a01c1d426$38b2c410$f82a6ba5@lc.ca.gov> <20020325182247.GD14939@dan.emsphone.com> <008401c1d42d$7ad8f420$f82a6ba5@lc.ca.gov>
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Drew Tomlinson wrote:
>
> ----- Original Message -----
> From: "Dan Nelson" <dnelson@allantgroup.com>
> To: "Drew Tomlinson" <drew@mykitchentable.net>
> Cc: "Walter Hop" <walter@binity.com>; <smorton@acm.org>;
> <questions@FreeBSD.ORG>
> Sent: Monday, March 25, 2002 10:22 AM
> Subject: Re: Showing Uptime Via webpage
>
> > > > [in reply to Drew Tomlinson, Monday 25 March 2002 18:38]
> > > >
> > > > > > #!/usr/bin/perl
> > > > > > print "Content-type: text/plain\n\n";
> > > > > > system ("uptime");
> > > > > > exit;
> > > > >
> > > > > I tried this just out of curiosity but ran into problems. I
> don't
> > > get
> > > > > any errors but I just get a blank web page.
> > > >
> > > > What happens if you run "/usr/bin/uptime" instead of "uptime"?
> > >
> > > Thanks for your suggestion. However, "/usr/bin/uptime" makes no
> > > difference. The page is still blank.
> >
> > Can you print any data at all? Note that you are generating an
> > incorrect HTML header; the spec says you must use CRLFs, and some
> > proxies/browsers may refuse to parse the page.
>
> I'm not sure exactly what you mean by "..print any data...". My web
> server shows my static pages just fine. I have a test script that I
> picked up somewhere along the way to test that cgi is working and that
> prints data on a web page. And if I run the script from the command
> line, I get this output:
>
> blacklamb# ./uptime
> Content-type: text/plain
>
> 9:56AM up 1 day, 44 mins, 1 user, load averages: 0.00, 0.00, 0.00
>
> I'm sorry if I'm being real dense here but I have no experience with
> perl and very, very little in designing web pages without the help of
> (gasp) FrontPage but I'm trying to learn.
>
> So I assume that the \n is either a CR or and LF and I need \something
> else to conform to the spec? I was just using and example that was
> posted previously.
>
> Thanks for your help.
>
> Drew
What happens if you change the header from printing Content-type: text/plain
to Content-type: text/html:
#!/usr/bin/perl
print "Content-type: text/html\n\n";
system("uptime");
Does this work?
Best regards,
Paul
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