HTML5 URL LOCATOR CHAPTER 22

TUTORIAL 22 ON HTML URL LOCATORS



HTML Uniform Resource Locators

A URL is another word for a web address.

A URL can be composed of words (www.unknownprogrammer.blogspot.com), or an Internet Protocol (IP) address (192.68.20.50).

Most people enter the name 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.

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

A web address like Unknownprogramming.blogspot.com/default.asp follows these syntax rules:

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

Explanation:

  • scheme - defines the type of Internet service (most common is http or https)
  • prefix - defines a domain prefix (default for http is www)
  • domain - defines the Internet domain name (like w3schools.com)
  • port - defines the port number at the host (default for http is 80)
  • path - defines a path at the server (If omitted: the root directory of the site)
  • filename - defines the name of a document or resource

Common URL Schemes

The table below lists some common schemes:

Scheme

Short for

Used for

http

HyperText Transfer Protocol

Common web pages. Not encrypted

https

Secure HyperText Transfer Protocol

Secure web pages. Encrypted

ftp

File Transfer Protocol

Downloading or uploading files

file

 

A file on your computer


URL Encoding

URLs can only be sent over the Internet using the ASCII character-set. If a URL contains characters outside the ASCII set, the URL has to be converted.

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

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

URLs cannot contain spaces. URL encoding normally replaces a space with a plus (+) sign, or %20.

Try It Yourself

 


If you click "Submit", the browser will URL encode the input before it is sent to the server.

A page at the server will display the received input.

Try some other input and click Submit again.

FILE DOWNLOAD LINK BELOW 

 

 

 

 


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