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HTML•HTML Foundations

HTML Uniform Resource Locators

A URL is another word for a web address.

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 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 )
  • 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:

SchemeShort forUsed for
httpHyperText Transfer ProtocolCommon web pages. Not encrypted
httpsSecure HyperText Transfer ProtocolSecure web pages. Encrypted
ftpFile Transfer ProtocolDownloading or uploading files
fileA 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.

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.

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HTML Encoding (Character Sets)

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HTML Versus XHTML

This chapter

Overview
56

Lessons

191m

Read time

1. HTML Tutorial2. HTML Introduction3. HTML Editors4. HTML Elements5. HTML Attributes6. HTML Headings7. HTML Paragraphs8. HTML Styles9. HTML Text Formatting10. HTML Comments11. HTML Colors12. HTML RGB and RGBA Colors13. HTML HEX Colors14. HTML HSL and HSLA Colors15. HTML Styles - CSS16. HTML Links17. HTML Links - Different Colors18. HTML Links - Create Bookmarks19. HTML Images20. HTML Image Maps21. HTML Background Images22. HTML <picture> Element23. HTML Favicon24. HTML Page Title25. HTML Tables26. HTML Table Borders27. HTML Table Sizes28. HTML Table Headers29. HTML Table Padding & Spacing30. HTML Table Colspan & Rowspan31. HTML Table Styling32. HTML Table Colgroup33. HTML Lists34. HTML Unordered Lists35. HTML Ordered Lists36. HTML Other Lists37. HTML Block and Inline Elements38. HTML Div Element39. HTML class Attribute40. HTML id Attribute41. HTML Buttons42. HTML Iframes43. HTML JavaScript44. HTML File Paths45. HTML - The Head Element46. HTML Layout Elements and Techniques47. HTML Responsive Web Design48. HTML Computer Code Elements49. HTML Semantic Elements50. HTML Style Guide51. HTML Entities52. HTML Symbols53. Using Emojis in HTML54. HTML Encoding (Character Sets)55. HTML Uniform Resource Locators56. HTML Versus XHTML

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URL - Uniform Resource LocatorCommon URL SchemesURL Encoding