HPACK: Header Compression for HTTP/2

Table of Contents

1. Introduction

• 1.1. Overview
• 1.2. Conventions
• 1.3. Terminology

2. Compression Process Overview

• 2.1. Header List Ordering
• 2.2. Encoding and Decoding Contexts
• 2.3. Indexing Tables
• 2.3.1. Static Table
• 2.3.2. Dynamic Table
• 2.3.3. Index Address Space
• 2.4. Header Field Representation

3. Header Block Decoding

• 3.1. Header Block Processing
• 3.2. Header Field Representation Processing

4. Dynamic Table Management

• 4.1. Calculating Table Size
• 4.2. Maximum Table Size
• 4.3. Entry Eviction When Dynamic Table Size Changes
• 4.4. Entry Eviction When Adding New Entries

5. Primitive Type Representations

• 5.1. Integer Representation
• 5.2. String Literal Representation

6. Binary Format

• 6.1. Indexed Header Field Representation
• 6.2. Literal Header Field Representation
• 6.2.1. Literal Header Field with Incremental Indexing
• 6.2.2. Literal Header Field without Indexing
• 6.2.3. Literal Header Field Never Indexed
• 6.3. Dynamic Table Size Update

7. Security Considerations

• 7.1. Probing Dynamic Table State
• 7.1.1. Applicability to HPACK and HTTP
• 7.1.2. Mitigation
• 7.1.3. Never-Indexed Literals
• 7.2. Static Huffman Encoding
• 7.3. Memory Consumption
• 7.4. Implementation Limits

8. References

这一章都是引用的论文，所以就不翻译了。

• 8.1. Normative References
• 8.2. Informative References

Appendix A. Static Table Definition

Appendix B. Huffman Code

Appendix C. Examples

• C.1. Integer Representation Examples
• C.1.1. Example 1: Encoding 10 Using a 5-Bit Prefix
• C.1.2. Example 2: Encoding 1337 Using a 5-Bit Prefix
• C.1.3. Example 3: Encoding 42 Starting at an Octet Boundary
• C.2. Header Field Representation Examples
• C.2.1. Literal Header Field with Indexing
• C.2.2. Literal Header Field without Indexing
• C.2.3. Literal Header Field Never Indexed
• C.2.4. Indexed Header Field
• C.3. Request Examples without Huffman Coding
• C.3.1. First Request
• C.3.2. Second Request
• C.3.3. Third Request
• C.4. Request Examples with Huffman Coding
• C.4.1. First Request
• C.4.2. Second Request
• C.4.3. Third Request
• C.5. Response Examples without Huffman Coding
• C.5.1. First Response
• C.5.2. Second Response
• C.5.3. Third Response
• C.6. Response Examples with Huffman Coding
• C.6.1. First Response
• C.6.2. Second Response
• C.6.3. Third Response

Reference：

RFC 7541

GitHub Repo：Halfrost-Field

Follow: halfrost · GitHub

Source: https://halfrost.com/http2_rfc7541/