HTTP Protocol

  1. HTTP Versions
    1. HTTP/0.9
      1. The One-Line Protocol
        1. Simplicity and Limitations
          1. Request Format
            1. Response Format
              1. Historical Significance
              2. HTTP/1.0
                1. Introduction of Headers
                  1. Version Information in Messages
                    1. Status Codes Introduction
                      1. Content-Type Header
                        1. Connection Handling
                          1. Limitations and Issues
                          2. HTTP/1.1
                            1. Mandatory Host Header
                              1. Persistent Connections by Default
                                1. Pipelining Support
                                  1. Chunked Transfer Encoding
                                    1. Enhanced Caching Mechanisms
                                      1. Content Negotiation
                                        1. Range Requests
                                          1. Improved Error Handling
                                          2. HTTP/2
                                            1. Binary Framing Layer
                                              1. Multiplexing and Concurrency
                                                1. Header Compression (HPACK)
                                                  1. Server Push
                                                    1. Stream Prioritization
                                                      1. Flow Control
                                                        1. Backward Compatibility
                                                        2. HTTP/3
                                                          1. Built on QUIC Protocol
                                                            1. UDP-Based Transport
                                                              1. Reduced Head-of-Line Blocking
                                                                1. Faster Connection Establishment
                                                                  1. 0-RTT Connection Resumption
                                                                    1. Improved Mobility Support

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                                                                  2. Core Concepts of HTTP

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                                                                  4. Structure of HTTP Requests