Hyper Text Transfer Protocol

[Ruby17]

HTTP

The World Wide Web is composed primarily of HTML documents transmitted from a Web server to a Web browser using the Hypertext Transfer Protocol (HTTP).
However, HTTP can be used to serve images, sound, and other content in addition to HTML. To allow the Web browser to know how to handle the document it received, an indication of the file format of the document must be transmitted along with the document. This vital metadata includes the MIME type (text/html for HTML 4.01 and earlier, application/xhtml+xml for XHTML 1.0 and later) and the character encoding (see Character encodings in HTML).

In modern browsers, the MIME type that is sent with the HTML document affects how the document is interpreted. A document sent with an XHTML MIME type, or served as application/xhtml+xml, is expected to be well-formed XML, and a syntax error causes the browser to fail to render the document. The same document sent with an HTML MIME type, or served as text/html, might be displayed successfully, since Web browsers are more lenient with HTML. However, XHTML parsed in this way is not considered either proper XHTML or HTML, but so-called tag soup.

If the MIME type is not recognized as HTML, the Web browser should not attempt to render the document as HTML, even if the document is prefaced with a correct Document Type Declaration. Nevertheless, some Web browsers do examine the contents or URL of the document and attempt to infer the file type, despite this being forbidden by the HTTP 1.1 specification.

[Guest]

Yes, I know about it.
Can you tell me about FTP.