WebSockets

A Simplified Understanding of TCP, HTTP, SSE, and WebSocket

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A Simplified Understanding of TCP, HTTP, SSE, and WebSocket

Features TCP HTTP SSE WebSocket Communication Direction Bidirectional Request-Response Unidirectional (Server → Client) Bidirectional Underlying Protocol IP TCP HTTP TCP (Initial handshake is HTTP) Protocol Layer Transport Layer Application Layer Application Layer Application Layer Core Advantages Reliable, Stable Simple, Stateless, General Lightweight, Auto-Reconnect True Duplex, Low Latency Main Disadvantages Complex Protocol, High Overhead Header Redundancy, … Read more

The Past and Present of the HTTP Protocol

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The Past and Present of the HTTP Protocol

HTTP stands for Hypertext Transfer Protocol, which is the protocol for transferring hypertext. There is a plethora of information available online about the HTTP protocol, but most of it lists the specific regulations of the HTTP protocol, with few discussing the reasons behind its design. Today, I will attempt to analyze the main characteristics of … Read more

Remote Operation and Maintenance Deployment for Embedded Devices

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Remote Operation and Maintenance Deployment for Embedded Devices

In on-site operation and maintenance, you may be troubled by the following issues: • Remote devices are scattered in weak network/cellular/private network environments, unable to open public IPs, and temporary debugging requires sending personnel on-site. • VPN/port forwarding configurations are complex and unstable, making it difficult to implement fine-grained permissions and operation logging. • Device … Read more

A Tunnel Solution for Exposing Local HTTP, TCP, or WebSocket Connections to the Public Internet

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A Tunnel Solution for Exposing Local HTTP, TCP, or WebSocket Connections to the Public Internet

portr A tunnel solution that allows local HTTP, TCP, or WebSocket connections to be exposed to the public internet. It securely transmits connections using SSH remote port forwarding technology. Github Repository https://github.com/amalshaji/portr Official Website https://portr.dev/ Main Features 1. Admin Dashboard • Provides a complete web interface for monitoring active connections, managing teams, and controlling access … Read more

Detailed Explanation of ResTempale and OkHttp3

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Detailed Explanation of ResTempale and OkHttp3

📌 1. Core Definitions and Basic Understanding (What?) 1. Official Documentation/Specifications • Positioning: OkHttp is a modern and efficient HTTP & HTTP/2 client open-sourced by Square (official documentation). • Core Objectives: • Support for HTTP/2 and WebSocket • Connection pool reuse to reduce latency • Transparent GZIP compression • Response caching • Automatic retries and … Read more

Everyone Needs an HTTP Proxy for Debugging

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Everyone Needs an HTTP Proxy for Debugging

Introduction This article discusses how front-end engineers can use HTTP proxies for debugging, going beyond the limitations of DevTools. Today’s article is shared by Front-end Morning Reading @huli. As a front-end engineer who deals with web pages daily, it is quite reasonable to be familiar with the use of DevTools. Whenever there is an issue … Read more

Everyone Needs an HTTP Proxy for Debugging

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Everyone Needs an HTTP Proxy for Debugging

Author: @huli https://blog.huli.tw/2025/04/23/everyone-need-a-http-proxy-to-debug/ Introduction This article introduces how front-end engineers can use HTTP proxies for debugging, surpassing the limitations of DevTools. Today’s article is shared by Front-end Morning Reading @huli. As a front-end engineer who deals with web pages daily, it is quite reasonable to be familiar with the use of DevTools. Whenever there is … Read more

Frontend HTTP Requests: A Practical Guide to Accurately Determining Data Reception Completion

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Frontend HTTP Requests: A Practical Guide to Accurately Determining Data Reception Completion

When users download large files and the progress stalls at 99%, or when real-time data streams suddenly interrupt without notice—these typical issues stem from neglecting to accurately determine the completion of HTTP responses. This article will delve into solving a key challenge in frontend development:How to accurately determine whether HTTP response data has been completely … Read more

Feasibility Design of MATLAB-Cesium Joint Simulation

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Feasibility Design of MATLAB-Cesium Joint Simulation

As an excellent open-source GIS software, Cesium has powerful data rendering and interaction capabilities. To achieve dynamic functions such as simulating aircraft flight, it can be linked with high-performance data processing software MATLAB for joint simulation. Here, the author proposes a feasible solution. This solution requires the use of three software: Cesium 1.131, node 22.17.1 … Read more

IoT Architecture Based on ESP32 and AWS Fully Managed Services: Efficient Device-Cloud-APP Interconnection with MQTT + WebSocket

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IoT Architecture Based on ESP32 and AWS Fully Managed Services: Efficient Device-Cloud-APP Interconnection with MQTT + WebSocket

Using ESP32 + MQTT (Device to Cloud) + WebSocket (Cloud to APP) architecture, and introducing AWS Serverless + AWS IoT Core. This is a modern, scalable, and low-maintenance IoT architecture choice. Covers low power consumption for devices, optimization of AWS cloud serverless architecture, and IoT Core access design. 1. Overall Architecture Diagram Plain Text [ESP32] … Read more