Welcome to the HttpCore component of the Apache HttpComponents project.

For building from source instructions please refer to BUILDING.txt.

HttpCore requires Java 1.8 compatible runtime. The optional httpcore5-jackson3 module depends on Jackson 3 and requires Java 17.

• RFC 9110 - HTTP Semantics
• RFC 9112 - Hypertext Transfer Protocol Version 1.1 (HTTP/1.1)
• RFC 9113 - Hypertext Transfer Protocol Version 2 (HTTP/2)
• RFC 7541 - HPACK: Header Compression for HTTP/2
• RFC 1945 - Hypertext Transfer Protocol -- HTTP/1.0
• RFC 3986 - Uniform Resource Identifier (URI): Generic Syntax
• RFC 9218 - Extensible Prioritization Scheme for HTTP
• RFC 10008 - The HTTP QUERY Method
• RFC 9651 - Structured Field Values for HTTP
• RFC 9530 - Digest Fields

Apache HttpComponents Core is licensed under the Apache License 2.0. See the files LICENSE.txt and NOTICE.txt for more information.

• For general information visit the main project site at
  https://hc.apache.org/
• For current status information visit the status page at
  https://hc.apache.org/status.html
• If you want to contribute visit
  https://hc.apache.org/get-involved.html

This distribution may include software that has been designed for use with cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See https://www.wassenaar.org/ for more information.

The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this Apache Software Foundation distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.

The following provides more details on the included software that may be subject to export controls on cryptographic software:

Apache HttpComponents Core interfaces with the Java Secure Socket Extension (JSSE) API to provide

• HTTPS support

Apache HttpComponents Core does not include any implementation of JSSE.