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Software Development Architectures When building software applications, developers must create both client and server components. Server: Provides continuous, around-the-clock services Client: Initiates requests to locate and consume services Two primary architectural patterns exist: C/S Architecture (Client/Server) Examples: Desktop QQ appli ...

Function Prototypes select #include <sys/select.h> int select(int max_fds, fd_set *read_set, fd_set *write_set, fd_set *except_set, struct timeval *timeout); poll #include <poll.h> int poll(struct pollfd *fds, nfds_t nfds, int timeout); epoll #include <sys/epoll.h> int epoll_create(int size); int epoll_ctl(int ep ...

Netty provides a robust foundation for implementing custom HTTP servers without relying on traditional web frameworks like Spring MVC or Jakarta Servlet. Its channnel-based architecture allows fine-grained control over request parsing, response generation, and protocol handling. Core Pipeline Configuration To enable HTTP support, the server pip ...

When working with Qt's network library in production projects, developers may encounter certain limitations and edge cases. This article documents a common issue where Fiddler cannot capture network requests initiated by Qt applications, along with the solution. The Problem During the testing phase, QA engineers reported that Fiddler was unable ...

Apache Commons Net FTPClient Dependency Apache Commons Net provides a comprehensive FTP client implementation for Java applications through its FTPClient class. This library enables developers to perform various file transfer operations with FTP servers. Maven Configuration Add the following dependency to your project's pom.xml file: <depend ...

TCP Communication in Qt TCP Programming Charatceristics Requires both server and client components Add QT += network to project file Key classses: QTcpServer and QTcpSocket TCP Server Implementation Project Configuration QT += core gui network UI Components Read-only receive text area Port number input field Message input field Action butto ...

UDP Broadcasting Implementation in C The follownig example demonstraets how to create a UDP broadcast cliant in C using epoll for efficient I/O multiplexing. This client broadcasts messages to a specified network address and port, then listens for server responses. Code Implementation #include <sys/socket.h> #include <netinet/in.h> ...

This article demonstrates an implementation of core system utility functions for iOS devices, providing capabilities to retrieve device information, network addresses, memory statistics, and battery status. System Information Header // // DeviceSystem.h // PhoneManager // #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> ...

Implementing bidirectional data exchange over TCP in C# requires coordinating a listener that binds to a network interface and a client that initiates the connection. The .NET framework provides TcpListener and TcpClient to abstract low-level socket operations, while NetworkStream manages the underlying byte transmission pipeline. Server-Side I ...

Modbus TCP is a widely adopted industrial communication protocol that operates over standard Ethernet networks. Unlike its serial counterpart (Modbus RTU), it leverages TCP/IP for transport, eliminating the need for checksums while introducing new considerations around connection management, byte ordering, and message framing. Core Architecture ...