{Tutorial}HTML URL Encoding.Step 22.

[MrHotFire]

A URL is another word for a web address.

 

A URL can be composed of words, such as "mrhotfire.com", or an Internet Protocol (IP) address: 000.00.00.00. Most people enter the name of the website when surfing, because names are easier to remember than numbers.

URL - Uniform Resource Locator

 

Web browsers request pages from web servers by using a URL.

 

When you click on a link in an HTML page, an underlying <a> tag points to an address on the world wide web.

 

A Uniform Resource Locator (URL) is used to address a document (or other data) on the world wide web.

 

A web address, like this: http://www.mrhotfire.com/html/default.asp follows these syntax rules:

scheme://host.domain:port/path/filename 

 

Explanation

 

    scheme - defines the type of Internet service. The most common type is http

    host - defines the domain host (the default host for http is www)

    domain - defines the Internet domain name, like mrhotfire.com

    :port - defines the port number at the host (the default port number for http is 80)

    path - defines a path at the server (If omitted, the document must be stored at the root directory of the web site)

    filename - defines the name of a document/resource

 

Common URL Schemes

 

The table below lists some common schemes:

Scheme 	Short for.... 	Which pages will the scheme be used for...
http 	HyperText Transfer Protocol 	Common web pages starts with http://. Not encrypted
https 	Secure HyperText Transfer Protocol 	Secure web pages. All information exchanged are encrypted
ftp 	File Transfer Protocol 	For downloading or uploading files to a website. Useful for domain maintenance
file 	  	A file on your computer

 

URL Encoding

 

URLs can only be sent over the Internet using the ASCII character-set.

 

Since URLs often contain characters outside the ASCII set, the URL has to be converted into a valid ASCII format.

 

URL Encoding Examples

 

Character 	URL-encoding
€ 	%80
£ 	%A3
© 	%A9
® 	%AE
À 	%C0
Á 	%C1
 	%C2
à 	%C3
Ä 	%C4
Å 	%C5

 

 

URL encoding converts characters into a format that can be transmitted over the Internet.

 

URL encoding replaces non ASCII characters with a "%" followed by two hexadecimal digits.

 

URLs cannot contain spaces. URL encoding normally replaces a space with a + sign.

 

 

Credits Olympus,Internet,ME.