Solved

Requesting webpage from webserver

Posted on 2004-10-01
4
264 Views
Last Modified: 2010-04-20
When you open i.e. or any web browser and enter a URL and submit the request to any webserver, "WHAT" is sent?  When I say what, I mean I know that were making a call (request) for maybe a specific webpage as follows:

Open I.E.
Enter: http://www.yahoo.com/ in the URL area
Click enter or submit

I know that the request for the above URL will return the default webpage (index.html or whatever) that the webserver has set up.  But "WHAT" does the webserver receive?  Does the webserver receive a text file that has request information?

0
Comment
Question by:wesunivofmd
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 33

Accepted Solution

by:
humeniuk earned 250 total points
ID: 12201944
It sends a GET request, which is part of the HTTP protocol, not a text file or anything like that.  If you want more detail, this article is a good starting point: 'How Web Servers Work' (http://computer.howstuffworks.com/web-server.htm).  If that's too basic, see http://www.dslab.tuwien.ac.at/Task_Description/http.html or http://www.jmarshall.com/easy/http/.
0
 
LVL 34

Expert Comment

by:Dave_Dietz
ID: 12214315
It can be very interesting (and useful) to see what exactly is passing back and forth between a client and a web server.

Try downloading the IIS Resource Kit Tools from the following link:
http://www.microsoft.com/downloads/details.aspx?FamilyID=56fc92ee-a71a-4c73-b628-ade629c89499&DisplayLang=en

There is a utility called wfetch in there that will allow you to craft and send requests from basic get requests to complex requests with additional headers and body elements to any given webserver and see exactly what is sent back.

For example, this is what you would see for a standard GET request to http://www.yahoo.com:

started....
resolve hostname "www.yahoo.com"
WWWConnect::Connect("216.109.118.72","80")\n
source port: 4853\r\n
REQUEST: **************\n
GET / HTTP/1.1\r\n
Host: www.yahoo.com\r\n
Accept: */*\r\n
\r\n
RESPONSE: **************\n
HTTP/1.1 200 OK\r\n
Date: Mon, 04 Oct 2004 02:38:57 GMT\r\n
P3P: policyref="http://p3p.yahoo.com/w3c/p3p.xml", CP="CAO DSP COR CUR ADM DEV TAI PSA PSD IVAi IVDi CONi TELo OTPi OUR DELi SAMi OTRi UNRi PUBi IND PHY ONL UNI PUR FIN COM NAV INT DEM CNT STA POL HEA PRE GOV"\r\n
Cache-Control: private\r\n
Vary: User-Agent\r\n
Connection: close\r\n
Transfer-Encoding: chunked\r\n
Content-Type: text/html\r\n
\r\n
<html>
*** Actual page contents deleted for brevity***
></html>\n
\n
<!-- p9.www.dcn.yahoo.com uncompressed/chunked Sun Oct  3 19:38:57 PDT 2004 -->\n
WWWConnect::Close("216.109.118.72","80")\n
closed source port: 4853\r\n
finished.

Kinda cool, huh?  :-)

Hope this helps.....

Dave Dietz
0
 

Author Comment

by:wesunivofmd
ID: 12227168
Thanks, humeniuk
0
 
LVL 33

Expert Comment

by:humeniuk
ID: 12227266
Glad to be able to help out a little.  Good luck.

Thanks to Dave, too.  That's a handy tool.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In our day to day coding, how many times have we come across a necessity to check whether a URL is a broken link or not? For those of you that answered countless and are using ColdFusion like myself, then this article is for you.  It will show yo…
Most ColdFusion developers get confused between the CFSet, Duplicate, and Structcopy methods of copying a Structure, especially which one to use when. This Article will explain the differences in the approaches with examples; therefore, after readin…
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question