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Old 11-27-2011, 05:38 AM   #1
hshah
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How to Telnet to different web servers using Linux (Ubunto)


I want to Telnet to a web server from my Linux operating system (Ubunto) e.g. "google.com" and retrieve the index page. Then may be Send a search query via Telnet and see what do i get. I am not sure which add-on i require and what procedure to follow. i am using Ubunto
 
Old 11-27-2011, 07:28 AM   #2
Doc CPU
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Hi there,

Quote:
Originally Posted by hshah View Post
I want to Telnet to a web server from my Linux operating system (Ubunto) e.g. "google.com" and retrieve the index page. Then may be Send a search query via Telnet and see what do i get. I am not sure which add-on i require
none at all, in theory. You just have to "speak" HTTP. For example, try "telnet www.google.com 80", then you're connected to one of Google's web servers. Now talk:
Code:
GET /search?q=tuna+sandwich HTTP/1.0    <enter>
Host: www.google.com   <enter><enter>
After the double enter, the server should reply with a bunch of HTTP header lines, the first of which would be:
Code:
HTTP/1.x 200 OK
After the first blank line, the actual response data starts, which should be an HTML document here.

As I said: In theory.
In practise, Google is a bad example, because they require some more HTTP header lines in the request - AFAIK the most important one is a User-Agent that looks like a real browser. But you may try that with some other plain vanilla HTTP server. That's just the way HTTP works.

Quote:
Originally Posted by hshah View Post
i am using Ubunto
Please note: That popular distribution is called Ubuntu (with a 'u' at the end).

[X] Doc CPU
 
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Old 11-27-2011, 07:32 AM   #3
repo
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Why not use a text web browser like lynx?

Kind regards
 
Old 11-27-2011, 09:09 AM   #4
Doc CPU
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Hi there,

Quote:
Originally Posted by repo View Post
Why not use a text web browser like lynx?Kind regards
there had to be that answer sooner or later! ;-)

If it makes sense depends on what hshah really wants. If he's into lightweight, quick retrieval of online information without being annoyed by all the bells and whistles like ads and pseudo-friendly gimmicks, your suggestion is probably a good one. However, in that case he could just as well take a popular and widespread browser like Firefox or Opera and disable Javascript, CSS and display of images.

I thought that the OP might rather be interested in what browser and server are talking behind the scenes, and that would remain hidden with Lynx as well - or can you build arbitrary requests and view all HTTP response headers with Lynx? Probably not.

[X] Doc CPU
 
Old 11-27-2011, 01:20 PM   #5
theNbomr
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It's never obvious whether questions like this are demonstrating some undeveloped enlightenment, or full naivete. I like to take the optimistic approach, and assume there is some well-reasoned basis for the question. On that basis, I will suggest creating an HTTP client in a scripting language, such as Perl. This is easily done with the example code in the lib-www-perl module on CPAN. Even if the OP doesn't elect to write anything in Perl, there is enough information about the underlying mechanisms there to contribute to a successful venture using telnet.
--- rod.
 
Old 11-27-2011, 05:38 PM   #6
jefro
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http://www.dgate.org/~brg/bvtelnet80/
 
  


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