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
HTTP Proxy Injector: A Powerful HTTP Proxy Injection Tool HTTP Proxy Injector is a powerful tool for HTTP request proxying and injection, helping developers, testers, and security researchers intercept, modify, and redirect HTTP/HTTPS requests. It is widely used in development debugging, security testing, and network analysis. This article will comprehensively introduce the core features, working … Read more
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
Basic Concepts HTTP (HyperText Transfer Protocol) is an application layer protocol used for distributed, collaborative, and hypermedia information systems. In simple terms, it is a method for publishing and receiving HTML pages, used to transfer information between web browsers and web servers. HTTP operates by default on TCP port 80, and websites accessed with http:// … Read more
Introduction to MQTT: Practical Implementation 1. Overview of MQTT MQTT (Message Queuing Telemetry Transport) is a lightweight and efficient messaging protocol based on a publish-subscribe model, particularly suitable for Internet of Things (IoT) scenarios. Its operation is based on several core concepts: Broker: The core component of MQTT, acting as a message relay, is responsible … Read more
1. Application Layer The application layer is the first layer of the TCP/IP protocol, directly providing services to application processes. (Data unit: message) It supports the World Wide Web with HTTP, email with SMTP, and file transfer with the FTP protocol. 2. Transport Layer Responsible for providing general data transmission services for communication between processes … Read more
SDNCan SDN network architecture replace TCP/IP architecture?1. SDN and NFV differ from traditional routing table selection rules, as they choose forwarding paths through OpenFlow flow tables. Does this mean that routing protocols like OSPF and EIGRP are no longer needed? Can we say that it has replaced the network layer?2. Overlay provides layer 2 flat … Read more
Omron EtherCAT: Sharing on High-Speed Fieldbus for Synchronous Control Systems Introduction: Starting from My Experience Hello everyone! I am an engineer with many years of experience in industrial automation, primarily working with industrial fieldbus, motion control, and equipment debugging. In past projects, I have frequently encountered EtherCAT, especially in applications involving high-precision synchronous control systems. … Read more
CANopen is an application layer protocol based on the CAN bus. Porting it to the target platform generally requires the following steps: 1.Hardware Preparation ◦Ensure that the target microcontroller or microprocessor has a CAN controller. If there is no built-in CAN controller, an external CAN controller chip (such as SJA1000, etc.) may be required, and … Read more