Solved

Explanation about CInternetSession headers

Posted on 2001-06-21
2
489 Views
Last Modified: 2013-11-20
I need a clear explanation about the Headers in the CInternetSession which comes under CHttpConnection::AddRequestHeaders.

I need to download a HTML file from the HTTP server.
0
Comment
Question by:sunsrigod
[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 Comments
 

Accepted Solution

by:
baston earned 50 total points
ID: 6214352
Hi,

The request headers are a bunch of data your browser (or application) sends along with the page request.
It basically helps the server identify the capabilities of your browser and the type of data it can accept.
Let's see the most common ones (the ones I use):

"User-Agent" - Identifies the program/client to the server, mostly for statistics purpose.

"Accept-Language" - tells the server the type of language you accept or can deal with.

"Accept-Encoding" - the file encoding your browser accept.

"Connection" - tells the server whether to keep the connection open or to treat every request as a seperate one. this is usually set to  "Keep-Alive".

"Accept" - type of files you accept, it's divided to type (like "text", "image","application") and the extension, like ("jpeg","gif","plain") to form pairs: "image/jpeg", "text/html" etc.

Request headers are very simple to use. just define the ones you wish to include in the request, seperating them with CRLF and attach them using AddRequestHeaders() to your request.
It looks something like this:

----------------------------------------------
CString szAllInAll =
_T("Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/msword, application/x-comet, */*\rAccept-Language: he,en;q=0.5\rContent-Type: application/x-www-form-urlencoded\rAccept-Encoding: gzip, deflate\rUser-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows 98)\rConnection: Keep-Alive\r");

CHttpFile *pFile;

// Opening CInternetSession...
// Getting the connection..
// opening the CHttpFile

pFile->AddRequestHeaders(szAllInAll,HTTP_ADDREQ_FLAG_REPLACE | HTTP_ADDREQ_FLAG_ADD);

pFile->SendRequest();

(I used MSIE 5.01 headers)
--------------------------------------------------
that's it! pretty strait forward.
for more info: http://www.w3.org/Protocols/HTTP/HTRQ_Headers.html

Asaf
0
 

Author Comment

by:sunsrigod
ID: 6214961
thank U Asaf
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
Introduction: The undo support, implementing a stack. Continuing from the eigth article about sudoku.   We need a mechanism to keep track of the digits entered so as to implement an undo mechanism.  This should be a ‘Last In First Out’ collec…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…

623 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