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HTTP and HTTPS protocols

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  • To transfer web pages from a web server to a client web browser using TCP, usually on port 80,Hypertext Transport Protocol (HTTP) is used.


  • A D V E R T I S E M E N T
  • To inform the client web browser what type of data it is receiving,HTTP utilizes Multipart Internet Message Protocol (MIME) headers sent by the HTTP server.

    • HTTP Request
      1. Request Headers
      2. Request Methods
    • HTTP Response
      1. Response Messages
      2. Message Header Response Codes
    • Authentication
      1. Basic Authentication
      2. Digest Authentication
    • Encryption
    • Secure Sockets Layer



    HTTP

    To communicate web pages to web browsers,the Hypertext Transfer Protocol (HTTP) is used by web servers.When your browser connects to a web server, requests a web page from the server, and downloads the page,HTTP is used. It is a common standard that enables any browser to connect to any server, anywhere in the world.

    HTTP was originally designed by Tim Berners-Lee to support the special demands of web communications and with an emphasis on efficiency, and a target page load time of under a tenth of a second. Modern Internet networks can support this type of response provided the page isn't too large and the server is too far away.

    To download different parts of a web page, downloading the text, graphics, and other objects on the page in different orders,your browser can open more than one HTTP connection at once. That is why you may see the status messages in the bottom of your browser window switch between a message like "downloading 38% of 47K" to "downloading 62% of 15K" on the same page -- there are different HTTP connections.

    To specify the download priorities,some browsers enable you so that, for example, graphics are not loaded, text is loaded before graphics, everything is loaded at once, etc and check your individual browser preferences




    Sample HTTP

    GET / HTTP/1.0

    HTTP/1.0 200 OK
    Date: Wed, 18 Sep 1996 20:18:59 GMT
    Server: Apache/1.0.0
    Content-type: text/html
    Content-length: 1579
    Last-modified: Mon, 22 Jul 1996 22:23:34 GMT

    HTML document

    The use of full headers is preferred for several reasons which are as follows:

    • The first line of a server header includes a response code indicating that the success or failure of the operation

    • One of the server header fields will be Content-type:, which specifies that a MIME type to describe how the document should be interpreted.
    • If the document has moved, the server can specify its new location with a Location: field and allowing the client to transparently retry the request using the new URL.

    • WWW-Authenticate: and the Authorization: fields allow access controls to be placed on Web documents.

    • The Referer: field allows the client to tell the server the URL of the document that triggered this request and permitting savvy servers to trace clients through a series of requests.




    HTTP Supported Methods

    The table below lists the HTTP 1.1 methods supported by the RDF Gateway.

    HTTP Method Description
    GET Retrieves the information identified by the Request-URI.
    HEAD Identical to the GET method but returns no response body.
    POST Identical to the GET method but encodes parameters in the request body.
    PUT Updates the information identified by the Request-URI.
    DELETE Removes the information identified by the Request-URI.
    OPTIONS Requests information about the communication options available.



    HTTPS - Secure HTTP

    The HyperText Transport Protocol (Secure), the standard encrypted communication mechanism on the World Wide Web and this is actually just HTTP over SSL.




    Advantages of HTTPS

    1. Same as HTTP, only encrypted for security purposes.

      HTTPS (Hypertext Transfer Protocol over Secure Socket Layer, or HTTP over SSL) is a Web protocol built into its browser that encrypts and decrypts user page requests as well as the pages that are returned by the Web server and developed by Netscape. HTTPS is really just the use of the Netscape's Secure Socket Layer (SSL) as a sublayer under its regular HTTP application layering.



    2. The Hypertext Transport Protocol, Secure, the standard SSL communication mechanism of World Wide Web.

      (1) (HyperText Transport Protocol Secure) The protocol for accessing a secure Web server and using HTTPS in the URL instead of HTTP directs the message to a secure port address rather than the default Web port address of 80. The session is then managed by the security protocol.

      (2) (HyperText Transport Protocol Secure) The protocol for accessing a secure Web server and using HTTPS in the URL instead of HTTP directs the message to a secure port number rather than the default Web port number of 80. The session is then managed by a security protocol.

      (3) (HyperText Transport Protocol Server) A Web server that runs under Windows NT, developed by the European Microsoft Windows Academic Centre.



    3. HTTP layered over the SSL protocol.


    4. Secure Hypertext Transfer Protocol.


    5. Secure HyperText Transfer Protocol


    6. Same as HTTP but provides secure Internet communication using SSL.
      A type of server software which provides the ability for "secure" transactions to take place on the World Wide Web. If a Web site is running off a HTTPS server you can type in HTTPS instead of HTTP in the URL section of your browser to enter into the "secured mode". Windows NT HTTPS and Netscape Commerce server software support this protocol. SEE ALSO: proxy server, secure server and commerce server.



    7. https is ordinary http exchanged over an SSL-encrypted session.

      A new implementation of the HTTP protocol that provides for more secure web communications by including encryption methods.

    8. A variant of HTTP that encrypts messages for security.

      (HyperText Transfer Protocol Secure) A secure protocol for sending information forth and back over the Internet and the HTTPS protocol most frequently relies on the SSL (Secure Socket Layer) encryption system but others such as TLS (Transport layer security) are also available. Every attempt has been made to provide you with the correct acronym for HTTPS and if we missed the mark, we would greatly appreciate your help by entering the correct or alternate meaning in the box below. Definitions have been compiled multiple results provided for your review and popular search engine.



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    Keywords: HTTP and HTTPS protocols, http content type, http content length, http proxy server, http keep alive, https web server, http user agent, http web server, https internet explorer, http internet explorer, url http, https proxy, http redirect, http rfc, https header, http encoding, http 302, apache https, https post, php https, http cookies, http proxy, http format, http uri

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