HTTP, testing via Telnet - Revision history

Jimbo at 19:03, 29 December 2008

2008-12-29T19:03:29Z

Jimbo at 19:02, 29 December 2008

2008-12-29T19:02:58Z

Jimbo at 19:02, 29 December 2008

2008-12-29T19:02:50Z

Jimbo at 19:00, 29 December 2008

2008-12-29T19:00:19Z

Jimbo at 18:52, 29 December 2008

2008-12-29T18:52:36Z

New page

ph34r# '''telnet testdomain.tld 80'''
Trying 192.168.0.252...
Connected to testdomain.tld.
Escape character is '^]'.
'''GET <nowiki>http://www.testdomain.tld/</nowiki>'''
<html><body><h1>It works!</h1></body></html>
Connection closed by foreign host.

In this case, we connected to a fictious webserver and asked it to serve us its home page. Note the response - that's a recent Apache "congratulations" page, meaning that the server hasn't really been configured properly (yet). (Usually, you'll get a MUCH longer response - typical [[HTML]] pages these days run 150K+ in size in code alone!)

Note that the '''GET''' command is in all caps - Apache is very particular about capitalization, and will not understand [[HTTP]] commands which are not in all caps!

What happens if we ask for a page that doesn't exist?

ph34r# '''telnet testdomain.tld 80'''
Trying 192.168.0.250...
Connected to testdomain.tld.
Escape character is '^]'.
'''GET <nowiki>http://testdomain.tld/doesntexist.html</nowiki>'''
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL /doesntexist.html was not found on this server.</p>
<hr>
<address>Apache/2.0.52 (FreeBSD) PHP/5.2.1 with Suhosin-Patch Server at testdomain.tld Port 80</address>
</body></html>
Connection closed by foreign host.

← Older revision		Revision as of 19:03, 29 December 2008
Line 1:		Line 1:
−	When troubleshooting an HTTP service, it's frequently helpful to use the ~~'''~~telnet~~'''~~ client to "speak" to the server directly, rather than using a mail client which won't give you the exact responses the server does. In this example, we will use '''telnet''' to connect to an HTTP server, request a web page that exists, and request a web page that doesn't exist.	+	When troubleshooting an HTTP service, it's frequently helpful to use the [[telnet]] client to "speak" to the server directly, rather than using a mail client which won't give you the exact responses the server does. In this example, we will use '''telnet''' to connect to an HTTP server, request a web page that exists, and request a web page that doesn't exist.

	ph34r# '''telnet testdomain.tld 80'''		ph34r# '''telnet testdomain.tld 80'''

← Older revision		Revision as of 19:02, 29 December 2008
Line 1:		Line 1:
	When troubleshooting an HTTP service, it's frequently helpful to use the '''telnet''' client to "speak" to the server directly, rather than using a mail client which won't give you the exact responses the server does. In this example, we will use '''telnet''' to connect to an HTTP server, request a web page that exists, and request a web page that doesn't exist.		When troubleshooting an HTTP service, it's frequently helpful to use the '''telnet''' client to "speak" to the server directly, rather than using a mail client which won't give you the exact responses the server does. In this example, we will use '''telnet''' to connect to an HTTP server, request a web page that exists, and request a web page that doesn't exist.
−

	ph34r# '''telnet testdomain.tld 80'''		ph34r# '''telnet testdomain.tld 80'''

← Older revision		Revision as of 19:02, 29 December 2008
Line 1:		Line 1:
		+	When troubleshooting an HTTP service, it's frequently helpful to use the '''telnet''' client to "speak" to the server directly, rather than using a mail client which won't give you the exact responses the server does. In this example, we will use '''telnet''' to connect to an HTTP server, request a web page that exists, and request a web page that doesn't exist.
		+
		+
	ph34r# '''telnet testdomain.tld 80'''		ph34r# '''telnet testdomain.tld 80'''
	Trying 192.168.0.252...		Trying 192.168.0.252...

@@ Line 1: / Line 1: @@
   ph34r# '''telnet testdomain.tld 80'''
   Trying 192.168.0.252...
@@ Line 29: / Line 28: @@
   &lt;/body>&lt;/html>
   Connection closed by foreign host.