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Prerequisites Log in to your CentOS 7 server using an account that has sudo privileges. Ensure that no other service (such as Apache) is occupying port 80 or 443, as this would prevent Nginx from starting. Installing Nginx Nginx is available from the EPEL (Extra Packages for Enterprise Linux) repository. Follow these steps to install it: Inst ...

HTTP Protocol Request and Response Process Perform a simple HTTP request to observe the process: curl -v www.baidu.com HTTP Request Message Request Line Request Method: GET (read/retrieve) or POST (write/submit) Request Resource: e.g., index.html, oldboy.jpg Protocol Version: HTTP/1.0 (short-lived TCP connections), HTTP/1.1 (persistent TCP ...

When restarting Apache after cleaning log directories, the service fails with the following error: [root@localhost apache]# /etc/init.d/*_apache restart Stopping *_apache: [FAILED] Starting *_apache: (98)Address already in use: make_sock: could not bind to address [::]:99 (98)Address already in use: make_s ...

The worker_processes directive determines the number of worker processes Nginx should spawn. A typical Nginx instance runs one master process that manages multiple worker processes based on this setting. The default value is 'auto', which automatically creates a number of worker processes equal to the available CPU cores. When using SSL certifi ...

Nginx Overview Nginx is a high-performance HTTP server and reverse proxy known for low memory usage and strong concurrency support. It serves static content efficiently and handles dynamic content via CGI protocols like Perl and PHP, but requires Tomcat for Java applications. Optimized for high-load environments, Nginx supports up to 50,000 con ...

Tomcat Architecture OverviewApache Tomcat operates as a robust Servlet container, managing the lifecycle of web applications and handling client requests. Its architecture is fundamentally divided into two core modules: the Connector (Coyote) and the Container (Catalina). This separation of concerns allows Tomcat to decouple network communicati ...

Java Enterprise Context The Java Enterprise Edition (JavaEE) specification, former known as J2EE, defines standards for enterprise application development. Managed by the Java Community Process (JCP), it includes technologies like Servlets, JSP, JDBC, and JPA. The current version is JavaEE 8. Web Fundamentals The World Wide Web (WWW) provides a ...

Previously, there was some confusion about the relationship between Nginx, WSGI (or uWSGI, uwsgi), and Flask (or Django). After consulting some materials, the relationships have been clarified. In summary, from the moment a client sends an HTTP request to when Flask processes it, the request passes through three layers: the web server layer, th ...

Prerequisites Setup Before installing Nginx, create a dedicated directory for the installation. cd /usr/local/ mkdir nginx cd nginx Downloading Nginx Navigate to the official Nginx website and download the desired version. Its recommended to use the stable release for production environments. Uploading and Extracting Transfer the Nginx archive ...

Compiling Nginx from source provides greater control over the binary features and optimization for specific server environments. This process involves setting up the build enviroment, installing necessary libraries, and executing the compilation workflow. 1. Preparation of Installation Directories Create a dedicated workspace to store the sourc ...