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Introduction to RocketMQ For detailed explanation, you can view the following documents: rocketmq Basics RocketMQ It is an open source distributed messaging system, based on high availability distributed cluster technology, which provides low latency and highly reliable message publishing and subscription services. At the same time, it is wid ...

1, Explain Download Middleware is a hook framework for scripy's request / response processing. It is a lightweight low-level system used to globally change the request and response of scripy. It is often used to add agents, add cookie s, reissue requests after failure, and so on. 2, Activate Download Middleware To activate Download Middlewar ...

rabbitMQ learning (II) advanced features and clusters When we study middleware, it is often easy to get started (just be able to use API), but to achieve high availability and high performance of MQ, we still need to know some of its advanced features. Advanced features of rabbitMQ Ensure the reliability of MQ Students who have studied TCP ...

This article has been included https://github.com/lkxiaolou/lkxiaolou Welcome, star. preface In the previous article Design and implementation of Cobar SQL audit A question about the performance of timestamp acquisition is raised in Get the operating system time, and directly call system in Java currentTimeMillis(); It's OK, but in Cob ...

introduceThis article describes how to pass rk-boot Implement the CSRF verification logic of the server.What is CSRF?Cross Site Request Forgery (English: Cross Site Request Forgery), also known as one click attack or session riding, usually abbreviated as CSRF or XSRF, is an attack method to coerce users to perform unintentional operations on t ...

MQ related concepts What is mq Message queue is literally a queue. First in, first out, only messages are stored. It is also a cross process communication mechanism for upstream and downstream message delivery. In the Internet architecture, mq is a common upstream and downstream "logical decoupling + physical decoupling" message ...

Container network is not difficult Using containers always feels like magic. Containers work well for those who understand the underlying principles, but they are a nightmare for those who don't. Fortunately, we have studied container technology for a long time, and even successfully revealed that the container is only an isolated and restrict ...

catalogue Downloader Middleware 1, process_request(self, request, spider) 2, process_response(self, request, response, spider) 3, Random request header Middleware setting.py  middlewares.py httpbin.py 4, ip proxy pool Middleware 1. Purchasing agent 2. Using ip proxy pool 3. Exclusive agent pool   Downloader Middleware Downloader ...

preface    if you find it useful, remember to give the blogger a praise, comment and collection. It's not easy to write with one button.    and it's said that people who praise won't have too bad luck every day. If it's really white whoring, you're welcome to come often!!! 20 minutes to familiarize you with Redisson ...

Use jedis2 There may be a problem with the small partners of the connection pool of 9.1. After the program runs with high concurrency for a period of time, the error message of Could not get a resource from the pool will appear, and the idle connection idelPool in the redistemplate connection factory viewed after stopping the interface call is ...