11.25.1. URL-uniform Resource Locator ¶

The Web browser requests a page from the Web server through URL.

When you click a link on the HTML page, the corresponding <a> the label points to an address on the World wide Web.

A uniform Resource Locator (URL) is used to locate documents on the World wide Web.

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

Description:

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

• host -define domain hosts (the default host for http is www)

• domain -define Internet domain names, such as runoob.com

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

• path -defines the path on the server (if omitted, the document must be in the root directory of the site).

• filename -define the name of the document / resource

11.25.2. Common URL Scheme ¶

Here are some URL scheme:

11.25.3. URL character coding ¶

URL can only use the ASCII character set to be sent over the Internet. Because URL often contains ASCII characters outside the collection, URL must be converted to a valid ASCII format.

URL encoding replaces non-hexadecimal numbers with “%” followed by two digits ASCII characters.

URL cannot contain spaces. URL coding is usually used + to replace spaces.

11.25.4. Online instance ¶

If you click the submit button below, the browser will URL the input before sending it. The page on the server displays the input received.

Try typing some characters, and then click the submit button again.

11.25.5. URL coding example ¶