26 lines
1.3 KiB
Markdown
26 lines
1.3 KiB
Markdown
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Lecture Topic: Advanced HTTP
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# HTTP2
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Goal is to reduce latency, but keep the same methods, status codes, and header fields. Changes how data is formatted and transmitted between clients
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- Prioritises transmission of requested objects, and give a request a weight to each request to indicate priority
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- Server pushes additional objects to client, by sending multiple responses to a single client request, before receiving explicit
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- Head of line blocking
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- Before in HTTP 1.1 the request are blocked by large requests, as objects are delivered in sequence, and a workaround is to setup multiple TCP connections to request many objects at once
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- In version 2, objects are divided into *frames* and frame transmission is interleaved in a round robin fashion
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# HTTP3
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Improved performance even further by using streaming, by using the "QUIC" protocol over a bare UDP connection
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# HTML Versions
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- HTML 1.0 Is written by Tim Berners-Lee
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- HTML 1,2,3,4, 4.01 published in in 1999
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- XHTML is an extensible version of HTML, based on XML
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- HTML5
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- New elements, section for documents, figure for content flow, video, audio, canvas for multimedia
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- New APIs to prompt users, like alert(), confirm(), prompt(), and printing with print()
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HTML is a markup language that uses tags
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(list and explanation of common html tags)
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# CSS
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CSS defines the visual style of a document
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