CGI on IIS?! - ASP Free

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August 21st, 2005, 02:25 AM

Shadow Wizard

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CGI on IIS?!

I have just noticed that Request.ServerVariables("GATEWAY_INTERFACE") would give something like "CGI/1.1" - anyone has any idea how CGI appear in there?
just curious.....

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Last edited by Shadow Wizard : August 21st, 2005 at 02:28 AM.

August 21st, 2005, 02:47 AM

Doug G

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That's what it's supposed to return.

http://msdn.microsoft.com/library/e...cba2c253006.asp

August 21st, 2005, 04:16 AM

Shadow Wizard

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Quote:

Originally Posted by Microsoft

The revision of the CGI specification used by the server. The format is CGI/revision.

ok, but I thought CGI is "language" same way like ASP, only older. so why would ASP care what version of CGI the server use and support? unless I mis-understand something basic here...

August 21st, 2005, 06:36 AM

elijathegold

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Quote:

Originally Posted by Shadow Wizard

ok, but I thought CGI is "language" same way like ASP, only older. so why would ASP care what version of CGI the server use and support? unless I mis-understand something basic here...

CGI is Common Gateway Interface which is a standard for
interfacing external applications with information servers, such as
HTTP or Web servers.

Source: http://hoohoo.ncsa.uiuc.edu/cgi/intro.html

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August 21st, 2005, 06:46 AM

Shadow Wizard

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hmm... so you say that ASP is just different implementation of CGI then??

August 21st, 2005, 06:52 AM

elijathegold

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Quote:

Originally Posted by Shadow Wizard

hmm... so you say that ASP is just different implementation of CGI then??

No... ASP does not use the CGI. CGI is Out Of Process, which
means that each request will create a new process. ASP in In Process.

This has the advantage of being more efficient, but has the
disadvantage of programming errors bringing down the web
server.

Quote:

Originally Posted by MSDN

How does Active Server Pages compare to CGI?

Active Server Pages provides all of the functionality of CGI applications in an easier-to-use and more robust environment.

ASP is an easier way for your server to access information in a form not readable by the client (such as an SQL database) and then act as a gateway between the two to produce information that the client can view and use.

With CGI, the server creates as many processes as the number of client requests received. The more concurrent requests there are, the more concurrent processes created by the server. However, creating a process for every request is time-consuming and requires large amounts of server RAM. In addition, this can restrict the resources available for sharing from the server application itself, slowing down performance and increasing wait times on the Web.

Active Server Pages runs in the same process as the Web Server, handling client requests faster and more efficiently. It is much easier to develop dynamic content and Web applications with ASP.

August 21st, 2005, 07:08 AM

Shadow Wizard

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yeah, quite basic stuff. see what happens when you learn only by trial and error?

anyhow, this brings me back to the original question: why would ASP care for the CGI version? or, what can one do with the Request.ServerVariables("GATEWAY_INTERFACE") value? I can find use for any server variable with ease... apart of that one!!

August 21st, 2005, 07:15 AM

elijathegold

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Quote:

Originally Posted by Shadow Wizard

yeah, quite basic stuff. see what happens when you learn only by trial and error?

Well, it is a server variable and as a result, part of the
servervariables collection. I'm not sure that ASP would have much
use for it, but IIS also provides CGI access for languages like perl,
C, VB and so on and CGI programs could find it useful.

Anyway I know what you mean about Trial and Error, It can
leave some huge gaps that you don't know are there. Until
you fall down them

August 21st, 2005, 07:43 AM

Shadow Wizard

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thanks for the information, little gap has been filled indeed!

how did you acquire this knowledge, though? part of official studies or just extra knowledge from roaming the internet and forums?

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August 21st, 2005, 08:01 AM

elijathegold

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Quote:

Originally Posted by Shadow Wizard

thanks for the information, little gap has been filled indeed!

how did you acquire this knowledge, though? part of official studies or just extra knowledge from roaming the internet and forums?

A bit of both, I'm mostly self taught but I did complete my Master
CIW Designer and Developer qualifications which had some
instructor led courses.

That involved 10 exams in various subjects including ASP, PHP,
Perl, Javascript, E-Commerce, Java, OO Design, Database Design and website design among others.

10 exams and just to boast a bit. I averaged 94%