Click the “blue text” above to follow us “The program was running fast when it first launched, but why is it crawling like a snail now?” I received a request for help from a student a few days ago. After investigation, I found that he was using the default HTTP client from the Go standard … Read more
HttpServlet and HttpServletRequest Interface HTTP Protocol Overview of HttpServlet Overview of HttpRequest Interface Some Insights and Thoughts 1. HTTP Protocol What is HTTP? The HTTP protocol, short for Hyper Text Transfer Protocol, is a protocol used for transferring hypertext from a server (WWW: World Wide Web) to a local browser. The HTTP protocol operates on … Read more
This blog post demonstrates how to create a simple HTTP service using Qt6. This example shows how to establish a server using the QHttpServer class. The server listens on a TCP port using the bind() function of QTcpServer and adds different URL handlers using the route() function. QSslConfiguration conf = QSslConfiguration::defaultConfiguration(); const auto sslCertificateChain = … 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
Communication Knowledge When browsing the internet, have you noticed that some websites have URLs starting with HTTP:// while others start with HTTPS://? HTTP and HTTPS are two protocols used for transmitting information over the internet. Although they serve similar functions, there are significant differences in terms of security and application scenarios. This article will detail … Read more
“ HTTP/2 is the first update to the HTTP protocol since its release, approved on February 17, 2015. It employs a series of optimization techniques to enhance the overall transmission performance of the HTTP protocol, such as asynchronous connection multiplexing and header compression, making it one of the essential solutions for optimizing network layer architecture … Read more
In the previous article, we discussed reading data from water quality sensors based on Arduino. For details, you can read the historical articles. However, due to the limitations of Arduino, it cannot upload data to the network. Therefore, this article presents a method for configuring a water quality sensor based on ESP8266 for data reporting. … Read more
Author: Zibo Zhou Original: https://www.emqx.com/en/blog/mqtt-session Table of Contents MQTT Persistent Sessions What Data Needs to be Stored for Persistent Sessions? Usage of MQTT Clean Session Session Improvements in MQTT 5.0 Q&A about MQTT Sessions Conclusion MQTT Persistent Sessions Unstable networks and limited hardware resources are two major challenges faced by IoT applications. The connection between … Read more
Author: Free and Open Lake AI What is MQTT Used For? MQTT is a lightweight messaging protocol commonly used for Internet of Things (IoT) devices, designed to be energy-efficient and consume minimal bandwidth. The MQTT protocol operates over TCP/IP and is based on a lossless communication bi-directional publish-subscribe model, ensuring that MQTT messages are delivered … Read more
TCP/IP is the foundational protocol of the Internet. Below is a detailed introduction to it: Protocol Layers •Application Layer: Provides application program interfaces for users. Common protocols includeHTTP (Hypertext Transfer Protocol),SMTP (Simple Mail Transfer Protocol),DNS (Domain Name System), etc.HTTP is used for web page transmission between browsers and servers;SMTP is used for sending emails;DNS is … Read more