HTTP long polling

Ansible: From Introduction to Abandonment (Part 21)

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Ansible: From Introduction to Abandonment (Part 21)

Asynchronous Operations Asynchronous operations and polling can be set using <span>async</span> and <span>poll</span>. Ansible Ad-Hoc Asynchronous, Concurrent, and Querying Starting Asynchronous Tasks [root@awx-1 ansible]# ansible localhost -B 3600 -P 5 -a "sleep 30" localhost | CHANGED =&gt; { "ansible_job_id": "j445703768934.50473", "changed": true, "cmd": [ "sleep", "30" ], "delta": "0:00:30.003839", "end": "2025-04-21 23:31:02.617454", "finished": 1, "msg": … Read more

Analysis of Embedded Driver Design Techniques

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Analysis of Embedded Driver Design Techniques

In embedded system development, driver design is a key factor affecting system performance, energy efficiency, and maintainability. Below is an in-depth analysis of three mainstream driver design techniques along with practical recommendations: 1. Polling Driver Technical Features: Blocking Design: The main program cannot perform other tasks while waiting for peripheral responses. Simple Implementation: Only requires … Read more

Vol.03 HTTP and SOCKET

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Vol.03 HTTP and SOCKET

“I previously wrote a paid column on the architecture of SaaS products for Xiaobaotong, but due to starting a business, I didn’t have time to continue improving it, so it was put on hold. Now I will share the content of the column on the public account, with an expected update once a month. If … Read more

How to Receive Messages in Real-Time via HTTP Like TCP?

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How to Receive Messages in Real-Time via HTTP Like TCP?

1How WebIM Implements Message Pushing WebIM typically has three methods to implement a push channel: WebSocket FlashSocket HTTP Polling Among these, ① and ② are implemented using TCP long connections, which can guarantee the real-time nature of messages through TCP. Scheme ③ is considered the “orthodox” method for WebIM to implement message pushing, using HTTP … Read more