httpClient

Preface

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.

Although the java.net package provides basic functionality for accessing resources via HTTP, it doesn't provide the full flexibility or functionality needed by many applications. HttpClient seeks to fill this void by providing an efficient, up-to-date, and feature-rich package implementing the client side of the most recent HTTP standards and recommendations.

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

序言

超文本传输协议或许是现现在互联网中最重要的协议，Web services,网络应用和网络计算的增加超过了用户驱动的web浏览器，进一步扩大了HTTP协议的做用同时增长了须要HTTP支持的应用的数量。

经过java.net 这个包提供经过HTTP访问资源的基本功能，它不提供许多应用须要的所有灵活性和功能。HttpClient旨在填补这一空缺经过提供一个高效的，最新的，而且功能丰富的包实现的最新标准和建议的HTTP客户端.

被设计成可扩展同时对基础HTTP协议提供了强有力的支持，HttpClient被用于建立HTTP-aware客户端应用，例如：web浏览器，web service 客户端或leverage系统或扩展HTTP协议的分布式通讯系统。

1. HttpClient scope

• Client-side HTTP transport library based on HttpCore

• Based on classic (blocking) I/O

• Content agnostic

1.HTTPClient 的范围

.client-side HTTP 传输库基于HttpCore

.基于经典的（阻塞）I/O

.内容无关

2. What HttpClient is NOT

• HttpClient is NOT a browser. It is a client side HTTP transport library. HttpClient's purpose is to transmit and receive HTTP messages. HttpClient will not attempt to process content, execute javascript embedded in HTML pages, try to guess content type, if not explicitly set, or reformat request / rewrite location URIs, or other functionality unrelated to the HTTP transport.

    HttpClient 不是一个浏览器。它是一个HTTP传输库的客户端。HttpClient的目的是传输和接受HTTP信息。