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SEO 1 Forums > Content >

HTTP



Author Thread
Jenniferlinn
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Joined: 01 Jan 2009
Good Posts: 107
Location: UK
HTTP  Reply with quote  

Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems.[1] Its use for retrieving inter-linked resources led to the establishment of the World Wide Web.

HTTP is a request/response standard between a client and a server. A client is the end-user, the server is the web site. The client making a HTTP request—using a web browser, spider, or other end-user tool—is referred to as the user agent. The responding server—which stores or creates resources such as HTML files and images—is called the origin server. In between the user agent and origin server may be several intermediaries, such as proxies, gateways, and tunnels. HTTP is not constrained to using TCP/IP and its supporting layers, although this is its most popular application on the Internet. Indeed HTTP can be "implemented on top of any other protocol on the Internet, or on other networks. HTTP only presumes a reliable transport; any protocol that provides such guarantees can be used."

The request message consists of the following:

* Request line, such as GET /images/logo.gif HTTP/1.1, which requests a resource called /images/logo.gif from server
* Headers, such as Accept-Language: en
* An empty line
* An optional message body


HTTP defines eight methods (sometimes referred to as "verbs") indicating the desired action to be performed on the identified resource. What this resource represents, whether pre-existing data or data that is generated dynamically, depends on the implementation of the server. Often, the resource corresponds to a file or the output of an executable residing on the server.

HEAD

Asks for the response identical to the one that would correspond to a GET request, but without the response body. This is useful for retrieving meta-information written in response headers, without having to transport the entire content.

GET

Requests a representation of the specified resource. Note that GET should not be used for operations that cause side-effects, such as using it for taking actions in web applications. One reason for this is that GET may be used arbitrarily by robots or crawlers, which should not need to consider the side effects that a request should cause. See safe methods below.

POST

Submits data to be processed (e.g., from an HTML form) to the identified resource. The data is included in the body of the request. This may result in the creation of a new resource or the updates of existing resources or both.

PUT

Uploads a representation of the specified resource.

DELETE


Deletes the specified resource.

TRACE

Echoes back the received request, so that a client can see what intermediate servers are adding or changing in the request.

OPTIONS

Returns the HTTP methods that the server supports for specified URL. This can be used to check the functionality of a web server by requesting '*' instead of a specific resource.

CONNECT

Converts the request connection to a transparent TCP/IP tunnel, usually to facilitate SSL-encrypted communication (HTTPS) through an unencrypted HTTP proxy.


SEO
Post Fri Mar 06, 2009 12:56 pm
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seo1
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Joined: 13 Oct 2008
Good Posts: 354
Location: India
 Reply with quote  

good post thanks for sharing lot of about HTTP but one bad thing like you forget here also mention source code

you just copy from here : http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol


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Post Fri Mar 06, 2009 1:03 pm
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krish
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Joined: 17 Dec 2008
Good Posts: 96
Location: India
 Reply with quote  

quote:
HTTP defines eight methods (sometimes referred to as "verbs") indicating the desired action to be performed on the identified resource. What this resource represents, whether pre-existing data or data that is generated dynamically, depends on the implementation of the server. Often, the resource corresponds to a file or the output of an executable residing on the server.


nice post thanks for sharing both of you good info about HTTP...


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Post Sat Mar 07, 2009 4:07 pm
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seoprofessional
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Joined: 26 Dec 2008
Good Posts: 57

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Good information
Post Fri Jul 17, 2009 10:56 am
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acasia
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Joined: 04 Aug 2009
Good Posts: 6

 Reply with quote  

Hi,

The use of hypertext, hyperlinks and a page-based model of sharing information, introduced with Mosaic and later Netscape, helped to define web content, ...

No fake signatures - thanks
Post Tue Aug 04, 2009 4:28 am
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tcyonline123
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Joined: 16 Nov 2010
Good Posts: 83
Location: India
 Reply with quote  

Thanks for this useful post. Happy reading.


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Post Mon Feb 28, 2011 4:43 am
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