# Java EE 企业应用系统开发 HTTP 响应处理编程 王晓东 wangxiaodong@ouc.edu.cn 中国海洋大学 November 17, 2018  。 ## 响应的内容 ▶ 响应状态（Status Code） ▶ 响应头（Response Header） ▶ 响应体（Response Body） ## ① HTTP 响应状态行 表明响应的状态信息，如成功、失败、错误。 状态行组成：版本 / 状态代码 / 状态消息。 ## 状态行例子 HTTP/1.1 200 ok 1

## +24 ## Creating a Sender/Receiver HTTP Server ## DIETMAR KÜHL 20 24 September 15 - 20 ## Objective • Create a basic HTTP server. • Allow a single-threaded server handling multiple clients. • std::execution (sender/receiver): http://wg21.link/p2300 • https://github.com/NVIDIA/stdexec.git • https://github.com/beman-project/execution26 • Sender/receiver networking: http://wg21.link/p2762 • Implementation: Implementation: https://github.com/beman-project/net29 •Async scope: http://wg21.link/p3149 TechAtBloomberg.com

# Apache HTTP Server Documentation Version 2.0  Apache Software Foundation February 3, 2014 ## About The PDF Documentation compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ version of the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.0/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

# Apache HTTP Server Documentation Version 2.2  Apache Software Foundation January 15, 2017 ## About The PDF Documentation compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ version of the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.2/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

Apache HTTP Server Documentation Version 2.4 Apache Software Foundation October 3, 2017 ## About The PDF Documentation Licensed to the Apache Software Foundation (ASF) under one or more contributor compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ version of the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

# Apache HTTP Server Documentation Version 2.4  Apache Software Foundation March 13, 2014 ## About The PDF Documentation compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ version of the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

Apache HTTP Server Documentation Version 2.4 Apache Software Foundation March 21, 2018 ## About The PDF Documentation Licensed to the Apache Software Foundation (ASF) under one or more contributor license compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ version of the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

# Apache HTTP Server Documentation Version 2.4  Apache Software Foundation February 3, 2014 ## About The PDF Documentation compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ version of the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

# 06.HTTP & AJAX # 19 décembre 2023 ## Développement web il3 HTTP & AJAX HE-Arc (DGR) 2022 ## HyperText Transfer Protocol • Protocole application : invention www en 1990 (v0.9) - Connexion Connexion, GET, réponse, fermeture • HTTP 1.0 (1996) - Entêtes de requête (Host, Referer, User-Agent, ...) et réponse (Content-Type, Set-Cookie, Location, ...) • HTTP 1.1 (1997) - Nouveaux entêtes (Keep-alive obligatoire • HTTP 2.0 $ ^{1} $ (2015) - Binaire, multiplexage connexions, compression entêtes, push, ... – Supporté par presque tous $ ^{2} $ les navigateurs, une majorité de serveurs • HTTP 3.0 $ ^{3}

[Image](/uploads/documents/b/1/0/5/b1059dfbcee2b670b93af9e16b949726/p1_1.jpg) ## 链滴 ## 一 次线上 java 应用响应时间过长问题的排查 作者：xinzhongtianxia 原文链接：https://ld246.com/article/1569574881351 来源网站：链滴 许可协议：署名-相同方式共享 svg)

最近接手一个老 java 应用，没多久接到响应时间太长的报警，整个排查过程还是挺有意思的，录一下。

整个过程中，设计到 cpu，内存，垃圾回收，引用，spring，单例 等等知识，整个下来，心情愉悦。

接到报警

吃完晚饭回来，接到报警短信，服务响应时间太长，达到 2s 以上。

第一反应，怎 第一反应，怎么可能，这个应用很简单，就提供了几个查询接口，QPS 单机也就 10 左右，居然响应间 2s 以上，这不科学。

看监控平台，有问题的机器，cpu占用很高，这。。。更不科学了。理论上，这应用cpu能到1

就不错了，现在居然 80%，吓得我赶紧跑到机器上，top 了一把，确实是 java 应用占用 cpu 很高。

找出占用cpu的线程