5. 参考文献 (References)

5.1. 规范性参考文献 (Normative References)

[HTTP] Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke, Ed., "HTTP Semantics", STD 97, RFC 9110, DOI 10.17487/RFC9110, June 2022, https://www.rfc-editor.org/info/rfc9110. 用途: 定义 HTTP 语义, 是本文档描述代理状态和协议行为的基础.

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, https://www.rfc-editor.org/info/rfc2119. 用途: 解释规范性关键词的要求级别.

[RFC7301] Friedl, S., Popov, A., Langley, A., and E. Stephan, "Transport Layer Security (TLS) Application-Layer Protocol Negotiation Extension", RFC 7301, DOI 10.17487/RFC7301, July 2014, https://www.rfc-editor.org/info/rfc7301. 用途: 定义 TLS 应用层协议协商 (ALPN) 扩展.

[RFC8126] Cotton, M., Leiba, B., and T. Narten, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 8126, DOI 10.17487/RFC8126, June 2017, https://www.rfc-editor.org/info/rfc8126. 用途: 提供 IANA 考虑事项章节和注册流程的编写准则.

[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, https://www.rfc-editor.org/info/rfc8174. 用途: 说明 RFC 2119 关键词在大小写使用上的解释规则.

[RFC8499] Hoffman, P., Sullivan, A., and K. Fujiwara, "DNS Terminology", BCP 219, RFC 8499, DOI 10.17487/RFC8499, January 2019, https://www.rfc-editor.org/info/rfc8499. 用途: 提供 DNS 术语定义, 便于解释相关字段.

[RFC8914] Kumari, W., Hunt, E., Arends, R., Hardaker, W., and D. Lawrence, "Extended DNS Errors", RFC 8914, DOI 10.17487/RFC8914, October 2020, https://www.rfc-editor.org/info/rfc8914. 用途: 定义 Extended DNS Errors (扩展 DNS 错误), 与本文档的错误表达相关.

[STRUCTURED-FIELDS] Nottingham, M. and P-H. Kamp, "Structured Field Values for HTTP", RFC 8941, DOI 10.17487/RFC8941, March 2021, https://www.rfc-editor.org/info/rfc8941. 用途: 定义 HTTP 结构化字段值, 供本文档的字段语法引用.

[TLS] Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018, https://www.rfc-editor.org/info/rfc8446. 用途: 定义 TLS 1.3, 是安全传输和协商语境的重要依据.

5.2. 资料性参考文献 (Informative References)

[RFC8586] Ludin, S., Nottingham, M., and N. Sullivan, "Loop Detection in Content Delivery Networks (CDNs)", RFC 8586, DOI 10.17487/RFC8586, April 2019, https://www.rfc-editor.org/info/rfc8586. 说明: 提供 CDN 环路检测背景, 帮助理解相关部署场景.