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SWAVE SEVAH + MONEY BAGZ  VS RYDA + JAKKBOY MAINE SMACK/ URL RAP BATTLE
SWAVE SEVAH + MONEY BAGZ VS RYDA + JAKKBOY MAINE SMACK/ URL RAP BATTLE
Published: 2017/09/06
Channel: Ultimate Rap League
CORTEZ + MATH HOFFA VS RUM NITTY + ILL WILL SMACK/ URL RAP BATTLE
CORTEZ + MATH HOFFA VS RUM NITTY + ILL WILL SMACK/ URL RAP BATTLE
Published: 2017/09/01
Channel: Ultimate Rap League
TAY ROC VS CHESS SMACK/ URL RAP BATTLE
TAY ROC VS CHESS SMACK/ URL RAP BATTLE
Published: 2017/07/10
Channel: Ultimate Rap League
Star TV - Canlı Yayın HD
Star TV - Canlı Yayın HD
Published: 2016/11/02
Channel: STARTVSTAR
HITMAN HOLLA + AYE VERB VS T TOP + BRIZZ RAWSTEEN SMACK/ URL
HITMAN HOLLA + AYE VERB VS T TOP + BRIZZ RAWSTEEN SMACK/ URL
Published: 2017/07/27
Channel: Ultimate Rap League
CHARLIE CLIPS + GOODZ VS ARSONAL + SHOTGUN SUGE  SMACK/ URL RAP BATTLE
CHARLIE CLIPS + GOODZ VS ARSONAL + SHOTGUN SUGE SMACK/ URL RAP BATTLE
Published: 2017/08/11
Channel: Ultimate Rap League
T-REX VS K-SHINE SMACK/ URL RAP BATTLE
T-REX VS K-SHINE SMACK/ URL RAP BATTLE
Published: 2017/05/22
Channel: Ultimate Rap League
GOODZ VS T-TOP SMACK/ URL RAP BATTLE
GOODZ VS T-TOP SMACK/ URL RAP BATTLE
Published: 2017/07/14
Channel: Ultimate Rap League
BRIZZ RAWSTEEN VS ILL WILL SMACK/ URL RAP BATTLE
BRIZZ RAWSTEEN VS ILL WILL SMACK/ URL RAP BATTLE
Published: 2017/06/16
Channel: Ultimate Rap League
MIKE P VS NU JERZY TWORK SMACK/ URL RAP BATTLE
MIKE P VS NU JERZY TWORK SMACK/ URL RAP BATTLE
Published: 2017/07/17
Channel: Ultimate Rap League
Loaded Lux vs Arsonal | UDubb
Loaded Lux vs Arsonal | UDubb's Alpha N Omega Rap Battle
Published: 2017/08/26
Channel: UDubb Network Battle League
CORTEZ VS PREZ MAFIA SMACK/ URL RAP BATTLE
CORTEZ VS PREZ MAFIA SMACK/ URL RAP BATTLE
Published: 2017/06/24
Channel: Ultimate Rap League
ARSONAL VS BRIZZ RAWSTEEN SMACK/ URL RAP BATTLE
ARSONAL VS BRIZZ RAWSTEEN SMACK/ URL RAP BATTLE
Published: 2017/01/01
Channel: Ultimate Rap League
JC VS CHEF TREZ SMACK/ URL RAP BATTLE
JC VS CHEF TREZ SMACK/ URL RAP BATTLE
Published: 2017/05/10
Channel: Ultimate Rap League
JAKK BOY MAINE/ RYDA  VS  SNAKE EYEZ/ DOUGY SMACK/ URL RAP BATTLE
JAKK BOY MAINE/ RYDA VS SNAKE EYEZ/ DOUGY SMACK/ URL RAP BATTLE
Published: 2017/06/21
Channel: Ultimate Rap League
JOHN JOHN DA DON VS TAY ROC SMACK/ URL Ultimate Rap League  Ultimate Rap League
JOHN JOHN DA DON VS TAY ROC SMACK/ URL Ultimate Rap League Ultimate Rap League
Published: 2017/04/26
Channel: Channel Rahat israel איהאב רהט
TH3 SAGA VS TINK DA DEMON SMACK/ URL RAP BATTLE
TH3 SAGA VS TINK DA DEMON SMACK/ URL RAP BATTLE
Published: 2017/07/13
Channel: Ultimate Rap League
QUEENZ FLIP VS JAY BLAC SMACK/ URL RAP BATTLE (BLOGGER BATTLE)
QUEENZ FLIP VS JAY BLAC SMACK/ URL RAP BATTLE (BLOGGER BATTLE)
Published: 2017/09/08
Channel: Ultimate Rap League
TSU SURF VS HITMAN HOLLA SMACK/ URL
TSU SURF VS HITMAN HOLLA SMACK/ URL
Published: 2014/10/13
Channel: Ultimate Rap League
SHOTGUN SUGE VS AVE SMACK/ URL RAP BATTLE
SHOTGUN SUGE VS AVE SMACK/ URL RAP BATTLE
Published: 2017/05/31
Channel: Ultimate Rap League
ILL WILL VS CALICOE SMACK/ URL RAP BATTLE
ILL WILL VS CALICOE SMACK/ URL RAP BATTLE
Published: 2017/06/09
Channel: UltimateRap League
TAY ROC VS CALICOE SMACK/ URL RAP BATTLE
TAY ROC VS CALICOE SMACK/ URL RAP BATTLE
Published: 2015/09/28
Channel: Ultimate Rap League
CHARLIE CLIPS VS ILL WILL SMACK/ URL RAP BATTLE
CHARLIE CLIPS VS ILL WILL SMACK/ URL RAP BATTLE
Published: 2016/12/09
Channel: Ultimate Rap League
Best of SMACK/ URL - 2017 (Born Legacy 3,4,5, Ascension, and more )
Best of SMACK/ URL - 2017 (Born Legacy 3,4,5, Ascension, and more )
Published: 2017/07/23
Channel: Playboy X
SMACK/ URL SUMMER MADNESS 6 RECAP (JC 3-0 Rum Nitty, Hollow vs Tay Roc Is A Classic & More!)
SMACK/ URL SUMMER MADNESS 6 RECAP (JC 3-0 Rum Nitty, Hollow vs Tay Roc Is A Classic & More!)
Published: 2017/09/12
Channel: Rap Grid
TSU SURF VS T-TOP SMACK/ URL RAP BATTLE
TSU SURF VS T-TOP SMACK/ URL RAP BATTLE
Published: 2016/12/15
Channel: Ultimate Rap League
O RED VS AVE SMACK/ URL RAP BATTLE
O RED VS AVE SMACK/ URL RAP BATTLE
Published: 2017/03/29
Channel: Ultimate Rap League
CONCEITED VS B-MAGIC SMACK/ URL
CONCEITED VS B-MAGIC SMACK/ URL
Published: 2014/12/06
Channel: Ultimate Rap League
CHARLIE CLIPS VS HOLLOW DA DON  SMACK/ URL (OFFICIAL VERSION)
CHARLIE CLIPS VS HOLLOW DA DON SMACK/ URL (OFFICIAL VERSION)
Published: 2015/06/03
Channel: Ultimate Rap League
MR WAVY VS BILL COLLECTOR SMACK/ URL RAP BATTLE
MR WAVY VS BILL COLLECTOR SMACK/ URL RAP BATTLE
Published: 2017/05/03
Channel: Ultimate Rap League
Best Punchlines SMACK/URL 2017 part 2 HD
Best Punchlines SMACK/URL 2017 part 2 HD
Published: 2017/06/26
Channel: Paulo Tavares
CHESS VS AVE SMACK/ URL RAP BATTLE
CHESS VS AVE SMACK/ URL RAP BATTLE
Published: 2016/12/25
Channel: Ultimate Rap League
Hitman Banned From Summer Madness 6 By Url and Hip-Hop Police
Hitman Banned From Summer Madness 6 By Url and Hip-Hop Police
Published: 2017/07/27
Channel: Battle Truth
MOON VS HOLMZIE DA GOD SMACK/ URL RAP BATTLE
MOON VS HOLMZIE DA GOD SMACK/ URL RAP BATTLE
Published: 2017/08/29
Channel: Ultimate Rap League
NU JERZY TWORK VS QLEEN PAPER SMACK/ URL RAP BATTLE
NU JERZY TWORK VS QLEEN PAPER SMACK/ URL RAP BATTLE
Published: 2017/04/04
Channel: Ultimate Rap League
GEECHI GOTTI VS GLUEAZY SMACK/ URL RAP BATTLE
GEECHI GOTTI VS GLUEAZY SMACK/ URL RAP BATTLE
Published: 2017/08/21
Channel: Ultimate Rap League
TAY ROC VS CHESS - ROAD TO URL/NOME 7
TAY ROC VS CHESS - ROAD TO URL/NOME 7
Published: 2017/03/30
Channel: hiphopisreal.com
TOP BARS OF 2016 - SMACK/URL
TOP BARS OF 2016 - SMACK/URL
Published: 2016/12/30
Channel: Jayblac1615
LOADED LUX VS CHARLIE CLIPS  SMACK/ URL
LOADED LUX VS CHARLIE CLIPS SMACK/ URL
Published: 2015/09/27
Channel: Ultimate Rap League
JOE VS HOLMZIE DA GOD SMACK/ URL RAP BATTLE
JOE VS HOLMZIE DA GOD SMACK/ URL RAP BATTLE
Published: 2017/05/24
Channel: Ultimate Rap League
JAZ THE RAPPER VS O
JAZ THE RAPPER VS O'FFICIAL SMACK/ URL (OFFICIAL VERSION)
Published: 2015/06/24
Channel: Ultimate Rap League
GOODZ DA ANIMAL VS T-TOP - ROAD TO URL/NOME 7
GOODZ DA ANIMAL VS T-TOP - ROAD TO URL/NOME 7
Published: 2017/04/08
Channel: hiphopisreal.com
CHAMPION | HOLLOW DA DON VS TAY ROC - SUMMER MADNESS 6 - SMACK/URL
CHAMPION | HOLLOW DA DON VS TAY ROC - SUMMER MADNESS 6 - SMACK/URL
Published: 2017/07/07
Channel: Jayblac1615
BEST OF NOME 7 SMACK/URL HD | Rap Battle 2017
BEST OF NOME 7 SMACK/URL HD | Rap Battle 2017
Published: 2017/07/19
Channel: Paulo Tavares
TAY ROC VS RUM NITTY SMACK/ URL RAP BATTLE
TAY ROC VS RUM NITTY SMACK/ URL RAP BATTLE
Published: 2017/01/09
Channel: Ultimate Rap League
TSU SURF/ TAY ROC VS K SHINE/ DNA SMACK/ URL RAP BATTLE
TSU SURF/ TAY ROC VS K SHINE/ DNA SMACK/ URL RAP BATTLE
Published: 2016/04/14
Channel: Ultimate Rap League
DAYLYT x BANGZ | RAP BATTLE
DAYLYT x BANGZ | RAP BATTLE
Published: 2017/08/18
Channel: WEGOHARDTV
DNA VS CHESS SMACK/ URL
DNA VS CHESS SMACK/ URL
Published: 2016/11/15
Channel: Ultimate Rap League
CHAMPION | DOUBLE IMPACT 2 - SMACK/URL
CHAMPION | DOUBLE IMPACT 2 - SMACK/URL
Published: 2017/06/02
Channel: Jayblac1615
RUM NITTY VS AVE  SMACK/ URL
RUM NITTY VS AVE SMACK/ URL
Published: 2016/03/28
Channel: Ultimate Rap League
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
  (Redirected from Uniform Resource Locator)
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A Uniform Resource Locator (URL), colloquially termed a web address,[1] is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identifier (URI),[2] although many people use the two terms interchangeably.[3][a] URLs occur most commonly to reference web pages (http), but are also used for file transfer (ftp), email (mailto), database access (JDBC), and many other applications.

Most web browsers display the URL of a web page above the page in an address bar. A typical URL could have the form http://www.example.com/index.html, which indicates a protocol (http), a hostname (www.example.com), and a file name (index.html).

History

Uniform Resource Locators were defined in RFC 1738 in 1994 by Tim Berners-Lee, the inventor of the World Wide Web, and the URI working group of the Internet Engineering Task Force (IETF),[6] as an outcome of collaboration started at the IETF Living Documents Birds of a feather session in 1992.[7][8]

The format combines the pre-existing system of domain names (created in 1985) with file path syntax, where slashes are used to separate directory and filenames. Conventions already existed where server names could be prefixed to complete file paths, preceded by a double slash (//).[9]

Berners-Lee later expressed regret at the use of dots to separate the parts of the domain name within URIs, wishing he had used slashes throughout,[9] and also said that, given the colon following the first component of a URI, the two slashes before the domain name were unnecessary.[10]

Syntax

Every HTTP URL conforms to the syntax of a generic URI. A generic URI is of the form:

 scheme:[//[user[:password]@]host[:port]][/path][?query][#fragment]

It comprises:

  • The scheme, consisting of a sequence of characters beginning with a letter and followed by any combination of letters, digits, plus (+), period (.), or hyphen (-). Although schemes are case-insensitive, the canonical form is lowercase and documents that specify schemes must do so with lowercase letters. It is followed by a colon (:). Examples of popular schemes include http(s), ftp, mailto, file, data, and irc. URI schemes should be registered with the Internet Assigned Numbers Authority (IANA), although non-registered schemes are used in practice.[b]
  • Two slashes (//): This is required by some schemes and not required by some others. When the authority component (explained below) is absent, the path component cannot begin with two slashes.[12]
  • An authority part, comprising:
  • A path, which contains data, usually organized in hierarchical form, that appears as a sequence of segments separated by slashes. Such a sequence may resemble or map exactly to a file system path, but does not always imply a relation to one.[15] The path must begin with a single slash (/) if an authority part was present, and may also if one was not, but must not begin with a double slash. The path is always defined, though the defined path may be empty (zero length), therefore no trailing slash.
Query delimiter Example
Ampersand (&) key1=value1&key2=value2
Semicolon (;)[d][incomplete short citation] key1=value1;key2=value2
  • An optional query, separated from the preceding part by a question mark (?), containing a query string of non-hierarchical data. Its syntax is not well defined, but by convention is most often a sequence of attribute–value pairs separated by a delimiter.
  • An optional fragment, separated from the preceding part by a hash (#). The fragment contains a fragment identifier providing direction to a secondary resource, such as a section heading in an article identified by the remainder of the URI. When the primary resource is an HTML document, the fragment is often an id attribute of a specific element, and web browsers will scroll this element into view.

A web browser will usually dereference a URL by performing an HTTP request to the specified host, by default on port number 80. URLs using the https scheme require that requests and responses will be made over a secure connection to the website.

Internationalized URL

Internet users are distributed throughout the world using a wide variety of languages and alphabets and expect to be able to create URLs in their own local alphabets. An Internationalized Resource Identifier (IRI) is a form of URL that includes Unicode characters. All modern browsers support IRIs. The parts of the URL requiring special treatment for different alphabets are the domain name and path.[17][18]

The domain name in the IRI is known as an Internationalized Domain Name (IDN). Web and Internet software automatically convert the domain name into punycode usable by the Domain Name System; for example, the Chinese URL http://例子.卷筒纸 becomes http://xn--fsqu00a.xn--3lr804guic/. The xn-- indicates that the character was not originally ASCII.[19]

The URL path name can also be specified by the user in the local writing system. If not already encoded, it is converted to UTF-8, and any characters not part of the basic URL character set are escaped as hexadecimal using percent-encoding; for example, the Japanese URL http://example.com/引き割り.html becomes http://example.com/%E5%BC%95%E3%81%8D%E5%89%B2%E3%82%8A.html. The target computer decodes the address and displays the page.[17]

Protocol-relative URLs

Protocol-relative links (PRL), also known as protocol-relative URLs (PRURL), are URLs that have no protocol specified. For example, //example.com will use the protocol of the current page, either HTTP or HTTPS.[20][21]

See also

Notes

  1. ^ A URL implies the means to access an indicated resource and is denoted by a protocol or an access mechanism, which is not true of every URI.[4][3] Thus http://www.example.com is a URL, while www.example.com is not.[5]
  2. ^ The procedures for registering new URI schemes were originally defined in 1999 by RFC 2717, and are now defined by RFC 7595, published in June 2015.[11]
  3. ^ For URIs relating to resources on the World Wide Web, some web browsers allow .0 portions of dot-decimal notation to be dropped or raw integer IP addresses to be used.[14]
  4. ^ Historic RFC 1866 (obsoleted by RFC 2854) encourages CGI authors to support ';' in addition to '&'.[16]

Citations

References

External links

Disclaimer

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All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

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