run() :

以下是流程图(存疑)

LinkHandler: 用于拼接两条Filter链

reject：拒绝连接

sendReply：发送回复st=>start: 开始 e=>end: 结束 init=>operation: context = connection.getHttpContext() check_context=>condition: context 不为空 get_rawio_by_connection=>operation: 从connection 中获取 rawin 和 rawout check_https=>condition: 检查 是否是https连接 get_rawio_by_https=>operation: 构造SSLStreams流 从SSLStreams流中获取 rawin 和 rawout get_rawio_by_http=>operation: 构造 BufferedInputStream 和 Request.WriteStream流并获取 rawin 和 rawout create_request=>operation: 根据rawin和rawout构造request对象 get_method_uriStr_version=>operation: 获取request的请求行并且解析method、url、version find_httpContextImpl=>operation: 获取HttpContextImpl对象 setContext=>operation: 为connection设置HttpContext create_ExchangeImpl=>operation: 构造ExchangeImpl对象 set_connection_ka=>operation: 根据http版本判断是否需要设置keep-alive set_parameters=>operation: 根据是否是新连接为connection设置参数 create_filter_chain=>operation: 责任链模式，构造链并且处理request st->init->check_context check_context(yes)->get_rawio_by_connection->create_request check_context(no)->check_https check_https(yes)->get_rawio_by_https->create_request check_https(no)->get_rawio_by_http->create_request create_request->get_method_uriStr_version get_method_uriStr_version->find_httpContextImpl find_httpContextImpl->setContext setContext->create_ExchangeImpl->set_connection_ka set_connection_ka->set_parameters->create_filter_chain->e{"scale":1,"line-width":2,"line-length":50,"text-margin":10,"font-size":12}