Description Installing ROS2 Dashing using APT in a Linux environment Test environment: Ubuntu 18.04 + ROS2 Dashing Installation Steps Set the language environment $ sudo locale-gen en_US en_US.UTF-8 $ sudo update-locale LC_ALL=en_US.UTF-8 LANG=en_US.UTF-8 $ export LANG=en_US.UTF-8 Add the key $ sudo apt update && sudo apt install curl gnupg2 lsb-release $ curl http://repo.ros2.org/repos.key | sudo … Read more
Introduction: Want to know the underlying secrets of Django ORM and Flask middleware? This article will guide you through building pluggable framework components using metaprogramming techniques, implementing core functionalities such as automated route registration and dynamic configuration loading step by step! At the end of the article, a Python full-stack development gift package is included, … Read more
Click the above“blue text” to follow us Go Language HTTP Middleware Chain: Goroutine Pooling Technology | Code Reuse Strategy “Brother Feng, our website traffic has suddenly surged, and the server CPU is maxed out!” This was a message sent urgently by a student yesterday. After checking the logs, I found that a large number of … Read more
Click the above“blue text”to follow us The Art of Middleware in Go: Building High-Performance HTTP Services and Concurrent Safe Maps Have you ever written a seemingly simple HTTP service, only to face a disaster under high concurrency? Or have you been overwhelmed by various shared data across requests? Don’t worry. Today, we will discuss the … Read more
Click the “blue text” above to follow us “Hey, Xiao Wang, do you know why our website occasionally times out?” As soon as I walked into the office, my boss said this. Huh? I looked puzzled. “During peak times, the interface response is as slow as a snail. Can you optimize the middleware?” My boss … Read more
Click the above“blue text” to follow us Middleware Design Patterns in Go: 8 Common Interception Techniques for HTTP Request Handling “Boss, we have repeated the login validation logic in our system over a dozen times, and the code is everywhere!” Little Wang, who just joined a few days ago, ran over with a frown and … Read more
Click the “blue text” above to follow us Yesterday, my friend Xiao Li called me: “Brother Feng, help! Our API service always lags during peak times, and I suspect it’s a middleware issue.” I laughed; isn’t this an old story? No matter how fancy the code is, it can’t escape the performance hurdle. Especially in … Read more
Click the above“blue text” to follow us Go Language HTTP Middleware Chain: Onion Model Design | Handling Cross-Cutting Concerns Want to know why efficient web services can handle authentication, logging, rate limiting, and error handling simultaneously without making the code look like spaghetti? The secret lies in the “onion model” design of HTTP middleware. Every … Read more
1. Essential Differences Between Synchronous and Asynchronous (Comparative Understanding) 1.1 Waiter Model Synchronous Mode: The waiter serves only one table of guests at a time (thread blocking) Asynchronous Mode: The waiter serves other guests while waiting for dishes to be served (event loop) # Synchronous request example import requests resp = requests.get('http://example.com') # Blocks until … Read more
Click the “blue text” above to follow us Yesterday, a novice asked me: “Brother Feng, why does our Go service always run out of network bandwidth during peak times?” I smiled and said, isn’t this the classic “naked running” problem? Your HTTP response isn’t wearing a “compression coat”, and the data is like a fat … Read more