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Apache
HttpComponents





Last Published: 2025-01-11|

HttpComponents/

Apache HttpComponents 
Apache
 




HttpComponents

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Components

HttpClient 5.4

HttpCore 5.3

HttpClient 4.5

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HttpAsyncClient 4.1 (EOL)

HttpCore 4.4 (EOL)

Commons HttpClient (EOL)

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ApacheConMaven

Apache HttpComponents


The Apache HttpComponents project is responsible for creating and maintaining a toolset of low level Java components focused on HTTP and associated protocols.

This project functions under the Apache Software Foundation (https://www.apache.org), and is part of a larger community of developers and users.

HttpComponents Overview


The Hyper-Text Transfer Protocol (HTTP) is perhaps the most significant protocol used on the Internet today. Web services, network-enabled appliances and the growth of network computing continue to expand the role of the HTTP protocol beyond user-driven web browsers, while increasing the number of applications that require HTTP support.

Designed for extension while providing robust support for the base HTTP protocol, the HttpComponents may be of interest to anyone building HTTP-aware client and server applications such as web browsers, web spiders, HTTP proxies, web service transport libraries, or systems that leverage or extend the HTTP protocol for distributed communication.

HttpComponents Structure

HttpComponents Core


HttpCore is a set of low level HTTP transport components that can be used to build custom client and server side HTTP services with a minimal footprint. HttpCore supports two I/O models: blocking I/O model based on the classic Java I/O and non-blocking, event driven I/O model based on Java NIO.

HttpComponents Client


HttpClient is a HTTP/1.1 compliant HTTP agent implementation based on HttpCore. It also provides reusable components for client-side authentication, HTTP state management, and HTTP connection management. HttpComponents Client is a successor of and replacement for Commons HttpClient 3.x. Users of Commons HttpClient are strongly encouraged to upgrade.

Commons HttpClient (legacy)


Commons HttpClient 3.x codeline is at the end of life. All users of Commons HttpClient 3.x are strongly encouraged to upgrade to HttpClient 4.1.
 





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