This comprehensive tutorial introduces several widely used intranet penetration and proxy tools—including nps, frp, EW, and ngrok—explaining their core principles, key features, installation steps, configuration details, and practical usage scenarios for secure remote access and service exposure.
This article compiles essential Nginx interview questions covering its definition, key features, differences from Apache, request handling mechanisms, master‑worker architecture, proxy types, module usage, and common configuration directives, providing a comprehensive guide for backend engineers preparing for technical interviews.
This guide explains what ZZNohost is, why it is used, and provides step‑by‑step instructions—including account setup, environment creation, whistle configuration, mobile proxy capture, UI automation integration with code examples, and platform‑level usage in Jarvis and WatchDog—to streamline multi‑environment testing and debugging.
This tutorial explains Java's proxy design pattern, bytecode manipulation, static proxies using AspectJ and JDK, dynamic proxies with JDK and CGLIB, and demonstrates how Spring AOP selects between these mechanisms, providing complete code examples for each approach.
This article explains how Spring AOP weaves aspect code using dynamic proxies, why internal calls via this bypass proxy logic, and how to correctly configure and obtain proxied beans using JDK/CGLIB proxies, @EnableAspectJAutoProxy, @Autowired injection, and AopContext.
This article shares a collection of powerful kubectl commands and tips—including API debugging, status‑based pod filtering and deletion, node‑specific pod listing, distribution counting with awk, and proxy usage—to help experienced Kubernetes users work more efficiently and avoid manual API client coding.
This article explains why Spring AOP proxies are not applied when a bean invokes its own methods via the this reference, compares JDK and CGLIB proxy mechanisms, and shows how to enable proxy exposure or use AopContext to achieve the desired AOP behavior.
This article provides a comprehensive walkthrough of Vue 3's reactivity system, covering the architecture diagram, prerequisite concepts like Proxy, Reflect, and WeakMap, and detailed source code explanations for reactive, readonly, ref, effect, and computed implementations, plus further reading links.
This article explains why a custom AOP annotation like @MyMonitor may not trigger advice in Spring Boot, analyzes the proxy‑based limitation of Spring AOP, and provides practical solutions such as self‑injection or AspectJ mode to ensure the advice executes correctly.
This article explains the concept of micro‑frontend, compares common implementation approaches such as dynamic module loading and browser sandboxing, details the use of Shadow DOM and Proxy for isolation, introduces frameworks like qiankun and hot‑chocolate, and describes an application platform that streamlines build, upload, and release workflows for complex front‑end projects.
This tutorial explains how to use XPath in Python to extract free proxy IP addresses from kuaidaili.com, covering XPath basics, installing the XPath Helper Chrome extension, crafting extraction rules, and looping through pages to collect and display results.
This article explains how Spring 5.3.3 creates AOP proxy objects using Advisors, details the internal methods for locating and applying both bean-defined and @Aspect advisors, and demonstrates how to implement a custom Advisor to intercept methods annotated with @DS, including common pitfalls and solutions.
This article walks through Spring’s AOP proxy creation process, detailing how enabling @EnableAspectJAutoProxy registers AnnotationAwareAspectJAutoProxyCreator, how it decides whether to wrap a bean, and the internal methods—wrapIfNecessary, isInfrastructureClass, shouldSkip, and advisor discovery—that together generate the dynamic proxies used at runtime.
This article explains Vue’s reactive system, compares Vue 2.6’s Object.defineProperty approach with Vue 3’s Proxy implementation, details how observers are defined, collected, and triggered, and shows why the asynchronous update queue improves performance and maintainability.
The article explains various Redis high‑availability solutions—including Sentinel service discovery, VIP binding, keepalived VRRP, and proxy middleware—for both master‑slave and cluster architectures, and shows how clients can reliably locate the current master node after failover.
This article explains how CGLIB creates proxy classes, decompiles them, sets thread callbacks, and uses MethodInterceptor and FastClass to efficiently intercept and invoke methods in a Java 8 environment, complete with code examples and diagram illustrations.
This article explains the principles and step‑by‑step implementation of Aspect‑Oriented Programming (AOP) in a lightweight Spring‑style container, covering core concepts, advice and pointcut design, weaving mechanisms, proxy creation, observer integration, and practical code examples.
This article provides a comprehensive overview of key structural design patterns—including Proxy, Adapter, Bridge, Decorator, Facade, Flyweight, and Composite—explaining their definitions, advantages, structure, real‑world scenarios, and complete Java implementations with code snippets and diagrams.
This article explores Nginx's origins, why it outperformed Apache, its core features such as event‑driven architecture and modularity, explains forward and reverse proxy concepts, and details the load‑balancing algorithms Nginx supports, providing practical insights for backend engineers.
The dubbo-go v1.5.6 release aligns with Dubbo 2.7.8 and introduces a CLI tool, proxy extensions, configurable file paths, custom ConfigPostProcessor, URL comparison enhancements, registration center optimizations, API‑based config, gRPC tweaks, and updates to dubbo-go‑hessian2, with a roadmap toward cloud‑native 3.x.
The article analyzes three typical situations—non‑public methods, internal self‑calls, and caught exceptions—that cause Spring's @Transactional annotation to be ineffective, explains the underlying proxy and AOP mechanisms, and provides Java code samples and test cases to illustrate each case.
This article provides a comprehensive Python web‑scraping guide covering basic GET/POST requests with urllib2, proxy handling, cookie management, header manipulation to mimic browsers, gzip compression handling, regular‑expression and library parsing, simple captcha strategies, and a multithreaded thread‑pool example.
This article explains the main reasons why Spring's @Transactional annotation may become ineffective—including non‑public method modifiers, internal method calls, and swallowed exceptions—provides code examples, test cases, and a deep dive into the underlying proxy and AOP mechanisms.
This article explores how MyBatis implements nine fundamental design patterns—including Builder, Factory, Singleton, Proxy, Composite, Template Method, Adapter, Decorator, and Iterator—by examining its source code, illustrating each pattern with concrete classes, code snippets, and diagrams to deepen developers' understanding of design patterns in practice.
Turbox is a front‑end framework designed for large‑scale 3D design editors, offering a reactive data‑flow transaction system, decorator‑based model definitions, Proxy‑driven state tracking, middleware, action handling, computed properties, and robust undo/redo mechanisms to streamline complex graphics applications.
This article presents nine practical methods to speed up GitHub access, including using mirror sites, Cloudflare Workers proxies, download accelerators, Chrome extensions, raw content CDNs, JsDelivr, Gitee repository forks, and manual hosts file modifications, with step‑by‑step instructions and relevant URLs.
This article explains how NetEase Cloud's audio‑video service overcomes the limitations of TCP in poor network conditions by adopting a QUIC‑based acceleration proxy architecture, detailing its design, key optimizations, and performance gains in latency, packet loss resistance, and bandwidth utilization.
This guide explains how to configure HTTP and HTTPS proxy environment variables with username and password authentication on Linux, including the conversion of special characters in passwords to their percent‑encoded ASCII representations, and provides a reference table of common ASCII codes.
This article explains how Aspect‑Oriented Programming (AOP) can replace repetitive try‑catch blocks in Dubbo services, introduces core AOP concepts such as JoinPoint, Pointcut, and Advice, and compares static, JDK dynamic, and CGLIB dynamic proxy implementations with practical Java code examples.
This guide shows how to integrate the Whistle proxy with frontend projects—whether using webpack devServer, a traditional setup without build tools, or custom plugins—by configuring domain‑based rules, handling CGI mocks, and leveraging exclude filters to enable seamless local debugging via real online URLs.
The article explains why Nginx silently discards request headers containing underscores, demonstrates the issue with a Spring Boot service and Postman, and shows how adding the 'underscores_in_headers on;' directive resolves the problem.
This article introduces Gradle as a modern Java build tool, explains how to install it via binaries or package managers, demonstrates using the Gradle wrapper, details dependency scopes, describes custom tasks and plugins, and provides step‑by‑step instructions for configuring mirrors and proxy settings to improve download speed and reliability.
This article explains the origins of Nginx, compares it with Apache, describes why Nginx gained popularity, details forward and reverse proxy concepts, and outlines the various load‑balancing algorithms it supports, providing a comprehensive overview for backend developers and operations engineers.
This article presents the background, research, design choices, core features, extensions, challenges, and outcomes of Mars, a proxy‑based lightweight frontend mock platform developed by Ctrip's IBU ticket team to improve development efficiency and testing flexibility across devices and environments.
This article explains six fundamental JavaScript design patterns—Constructor, Facade, Proxy, Strategy, Bridge, and State—illustrating their concepts, advantages, drawbacks, and providing clear code examples that demonstrate how each pattern can improve code organization, reuse, and maintainability in front‑end development.
This article provides a comprehensive overview of the design patterns used in the Spring framework—including Simple Factory, Factory Method, Singleton, Adapter, Decorator, Proxy, Observer, Strategy, and Template Method—explaining their implementation, underlying principles, and practical significance with code examples.
This article provides a comprehensive guide to Python web scraping, covering basic GET/POST requests, proxy usage, cookie management, browser header spoofing, gzip compression handling, and multithreaded crawling to improve efficiency and avoid common obstacles.
This article walks through the fundamentals of Spring AOP, showing how to replace repetitive logging code with AspectJ‑driven aspects, explains core AOP concepts, pointcut expressions, proxy creation mechanisms, advice types, caching behavior, and common pitfalls for Java backend developers.
This beginner‑friendly guide walks readers through installing Scrapy, creating a project and spider, running and debugging crawlers, implementing parsing with CSS/XPath, and overcoming common hurdles such as JavaScript rendering, user‑agent spoofing, and proxy rotation via configurable middlewares, enabling quick start of web‑crawling projects.
This tutorial explains why companies use a secondary HTTP proxy, introduces Cntlm as a secure NTLM‑capable proxy, and provides detailed installation, minimal configuration, authentication retrieval, and service reload instructions for both Debian‑based Linux distributions and Windows.
Learn how to install Cntlm on Debian‑based Linux or Windows, configure its authentication and proxy settings, obtain NTLM hashes, and apply changes by reloading or restarting the systemd service, enabling secure multi‑user HTTP proxy access within restricted networks.
This article provides a comprehensive guide to the Spring framework, covering its core modules, the concepts of Inversion of Control and Aspect‑Oriented Programming, various container implementations, proxy mechanisms, bean lifecycle, design patterns, MVC architecture, Spring Boot, Spring Cloud, and common annotations for Java backend development.
This tutorial demonstrates how to configure an open‑source Squid proxy in an AWS VPC to restrict Internet access, allow only approved Amazon S3 buckets and Yum repositories, route traffic through specific gateways, and achieve high availability using Auto Scaling and Route 53.
Learn how to use Python’s built-in urllib library for web requests, handling GET/POST, adding headers, managing proxies, processing cookies, handling errors, parsing URLs, and respecting robots.txt, with clear code examples and a practical case of scraping a novel site.
This guide lists nine practical methods—including public mirrors, Cloudflare‑based proxies, raw file CDN, JsDelivr, Gitee fork import, and manual hosts file edits—to speed up GitHub browsing, cloning, and release downloads for developers facing slow connections.
This article details Xiaomi's migration of tens of thousands of Redis instances from physical servers to Kubernetes, explaining the motivations for containerization, the deployment architecture with StatefulSets and a custom Redis Proxy, performance comparisons of proxy options, operational challenges, and the resulting benefits in resource utilization, automation, and service stability.
This article explains why Spring AOP advice does not trigger when a method calls itself via this, demonstrates how to reproduce the problem, and provides a solution using AopContext.currentProxy() together with proper proxy configuration to ensure the aspect executes correctly.
The nginx 1.19.4 mainline release adds new directives such as proxy_smtp_auth, several ssl_conf_command variants, and ssl_reject_handshake, with the latter allowing servers to reject SSL handshakes for specified hostnames, as demonstrated by example configuration snippets.
This article explains how service discovery has progressed from simple centralized proxies to client‑embedded libraries and finally to host‑level independent processes like Service Mesh, detailing each generation, their pros and cons, and how Kubernetes implements discovery and load balancing.
This article explains Chrome 80+ default blocking of third‑party cookies, describes SameSite attribute options, and presents four practical solutions—including a Node.js proxy that enables cookie sharing across front‑end, proxy, and back‑end services—complete with implementation code and deployment guidance.
This guide compiles multiple free methods—including mirror sites, Cloudflare Workers proxies, raw file CDNs, Chrome extensions, Gitee imports, and hosts file modifications—to dramatically speed up GitHub cloning, downloading releases, and accessing raw files for developers worldwide.
This guide presents nine practical methods to accelerate GitHub access, including using mirror sites, Cloudflare Workers proxies, raw file CDNs, Chrome extensions, Gitee fork imports, and manual hosts file modifications, each with step‑by‑step instructions and relevant URLs.
Envoy 1.15 introduces a Postgres filter that transparently parses the PostgreSQL wire protocol, extracts rich metrics without any server‑side changes, and exports them to Prometheus, while outlining its design goals, current capabilities, usage steps, limitations, and future roadmap.
This guide presents nine practical techniques—including mirror sites, Cloudflare Workers proxies, browser extensions, raw file CDNs, JsDelivr, Gitee fork imports, and hosts file modifications—to significantly speed up GitHub repository and file downloads for developers worldwide.
This guide introduces lowcode-mock, a zero‑configuration mock server that forwards regex‑matched requests to backend endpoints, covering installation, startup, route creation, generating mocks from YAPI or JSON, adding delays, handling HTTP errors, and proxying requests, all with code examples.
This article explains the concept of AOP, its typical use cases, the underlying mechanisms of Spring AOP (JDK dynamic proxy and CGLIB), the relationship with AspectJ, and provides a complete XML‑free code example that demonstrates aspects, pointcuts, join points and advice.
This article explains six essential software design patterns—Factory, Singleton, Decorator, Strategy, Proxy, and Observer—covering their concepts, structure, advantages, drawbacks, typical use cases, and provides concise Java code examples for each.
This article explains Redis sharding, covering its purpose, various partitioning methods such as range and hash partitioning, implementation approaches like client‑side and proxy‑assisted sharding, their drawbacks, and practical steps for migration and using Redis Cluster or Twemproxy.
This article explains how to split large files into chunks, control concurrent uploads with a Proxy‑based queue, and offload the upload process to a Web Worker to improve reliability and keep the main thread responsive, including practical code examples and bundling tips.
This guide explains how to set up HTTP/HTTPS proxy environment variables for the Docker daemon via systemd, configure per‑container proxy settings through the Docker client config.json, and pass proxy arguments during docker build, including special considerations for network isolation and host mode.
This guide explains how to configure HTTP/HTTPS proxies for Docker's daemon via systemd, set per‑container proxy settings through the Docker config file, and pass proxy arguments during image builds, covering common pitfalls and network isolation considerations.
The article explains how to bypass internal network restrictions by configuring a Java HTTP proxy, provides demo code for setting and using the proxy, and includes utility methods for proxy validation and request configuration.
This guide explains why Charles fails to install its macOS proxy helper, shows the problematic launch daemon plist, and provides step‑by‑step instructions to locate, edit, and restore the correct configuration so the proxy works again.
This guide walks through what Squid is, its traditional and transparent proxy modes, step‑by‑step installation, configuration of cache directories, service scripts, temporary and permanent proxy settings on Linux, and notes on using Squid as a unified outbound gateway.
This article explains how Xiaomi migrated tens of thousands of Redis instances from bare‑metal servers to Kubernetes, using Redis Proxy, StatefulSets, and Ceph storage to achieve resource isolation, automated deployment, dynamic scaling, and improved reliability while addressing latency, IP‑change, and security challenges.
This article describes how Qunar scaled its IDC infrastructure, introduced multi‑IDC deployment, automated DNS‑based load balancing, open‑source DNSDB, and an IDC proxy built on Squid to achieve rapid fault self‑healing and transparent traffic switching for both user and third‑party access.
This guide walks you through setting up Nginx on CentOS, explains its core features such as event‑driven architecture, lightweight modules, and CPU affinity, then demonstrates practical scenarios like static asset serving, browser caching, cross‑origin handling, anti‑hotlinking, reverse proxy, load balancing algorithms, and proxy caching with detailed configuration examples.
This guide explains how to set up a SOCKS5 proxy, convert it to HTTP with Privoxy, and configure Docker, Chrome, terminal tools, and Git on Unix systems to use the accelerated proxy for faster access to external services.
This article traces Nginx’s creation by Igor Sysoev, explains its advantages over Apache, and details how Nginx functions as a forward and reverse proxy, supports various load‑balancing algorithms, and is widely used in modern web infrastructure.
Explore the fundamentals of Envoy, the lightweight L7 proxy for modern SOA architectures, through a detailed walkthrough of its architecture, configuration structure, filter chain, and key components such as xDS, listeners, clusters, and runtime settings, illustrated with diagrams and practical examples.
This article chronicles Vue's journey from its first 0.6.0 release through major milestones like 1.0, 2.0, and the upcoming 3.0, explains the architectural changes, reactive system overhaul, Composition API, and provides practical code examples for migration and local experimentation.
This article explores the limitations of traditional web vulnerability scanners and manual testing, proposes a proxy‑based architecture that captures real user requests for centralized analysis, demonstrates a demo implementation using Burp and custom scanners, and reflects on the design's strengths and remaining challenges.
This tutorial walks through analyzing a proxy‑listing website’s structure, building a Python scraper using requests, Scrapy, regular expressions and BeautifulSoup, extracting IP, port, location and type fields across multiple pages, and saving the collected data to files, illustrating key web‑crawling techniques.
This tutorial explains how to overcome common anti‑scraping defenses of a proxy‑listing website by capturing legitimate HTTP headers with Fiddler, configuring the Python requests library, and building a dynamic proxy pool to keep your crawler running smoothly.
Xianyu created a highly extensible user‑behavior collection framework that standardizes data into a common ODPS schema, uses JavaScript Proxy to intercept navigation and API calls, maps business metrics via JSON, aggregates reports to cut dataset‑creation effort from days to minutes while avoiding heavy full‑tracking overhead.
This article continues the mica-http guide, showcasing how version v1.1.7 introduces enhanced proxy handling, retry mechanisms, page crawling, model integration, and result processing, while providing documentation links, example projects, and open‑source tool recommendations for building lightweight Java crawlers.
This article explains the concepts of forward and reverse proxies, compares their operation and use cases, and shows how they differ in client configuration, security, and load‑balancing, providing clear examples and visual illustrations for practical understanding.
This tutorial walks you through installing the GD library, building SARG from source, configuring its key parameters, running reports, using command‑line options, scheduling automated jobs with cron, and troubleshooting common installation and configuration issues for Squid log analysis.
This article explains how to use Python's urllib2 library for web scraping, covering basic page fetching, proxy configuration, cookie handling, form submission, header manipulation, anti‑hotlink techniques, and advanced methods like Selenium to bypass restrictions.
This article explains how an OpenDNS intelligent proxy works, its selective DNS‑level routing, the distinction between forward and reverse proxies, and how Nginx is used to implement these concepts, highlighting engineering challenges and future directions.
This article explains the origins of Nginx, compares it with Apache, describes forward and reverse proxy concepts, and details Nginx's load‑balancing mechanisms and algorithms, providing a comprehensive overview of how Nginx serves as a high‑performance web and proxy server.
This guide continues the mica‑http tutorial, detailing the new v1.1.7 release, proxy and retry mechanisms, page crawling steps, model usage, result handling, and provides documentation links and open‑source tool recommendations for building lightweight backend crawlers.
This article experimentally explores Nginx's keepalive settings—HTTP keepalive_timeout, proxy_read_timeout, and TCP so_keepalive—showing how different browsers, upstream delays, and TCP probes affect connection lifetimes and what practical steps administrators can take to troubleshoot unexpected disconnects.
This article examines how MyBatis implements numerous classic design patterns—including Builder, Factory, Singleton, Proxy, Composite, Template Method, Adapter, Decorator, and Iterator—through its source code, explaining each pattern's role, related classes, and code examples to deepen developers' understanding of backend architecture.
This article traces Nginx’s origins, explains why it outperforms Apache, details the concepts of forward and reverse proxy, and walks through Nginx’s load‑balancing algorithms and practical deployment scenarios, providing a comprehensive guide for backend engineers.
This guide explains practical techniques to avoid IP bans and 403 errors when web‑scraping, covering explicit and implicit waiting, User‑Agent spoofing, proxy usage, IP pools, and distributed crawling architectures.
Nohost, built on the open‑source Whistle proxy, offers a centralized, multi‑user, multi‑environment configuration and packet‑capture solution that lets developers, testers, and product teams instantly switch and share environments, automate CI integration, and streamline debugging across PC, H5, and mini‑program platforms.
This article explains ByteDance's shift to RocketMQ, detailing the business drivers, technical advantages, proxy layer implementation for microservices, encountered challenges, and the disaster‑recovery strategies adopted to ensure high availability and performance.
Vue 3 replaces Vue 2’s Object.defineProperty reactivity with a Proxy‑based system, using the Composition API (e.g., a reusable usePosition hook) to create reactive state, cache proxies via WeakMaps, differentiate array additions from length changes, and track dependencies through effect stacks for efficient updates.
This article shares practical troubleshooting steps for frequent Fiddler problems such as HTTPS capture failures, proxy connection refusals caused by host or IPv6 settings, and registration errors after Windows upgrades, helping testers quickly resolve proxy configuration issues.
This article explains why node‑sass binary downloads fail on internal DevOps platforms, analyzes the underlying proxy and Python2 requirements, and presents three practical solutions—including setting network proxies, configuring SASS_BINARY_PATH or SASS_BINARY_SITE, and deploying an internal npm mirror—to enable seamless frontend builds without modifying build commands.
Vue 3 introduces substantial performance gains, a smaller bundle size, tree‑shakable global APIs, a proxy‑based reactivity system, and experimental time‑slicing features, all of which make modern, mobile‑first web development faster and more efficient.
This article explains how Vue 3.0 rewrites its reactivity system using Proxy and Reflet, introduces the reactive, effect, and computed APIs, compares them with MobX, and details the resulting changes for arrays, collections, lazy observation, and IE compatibility.
This article explains the background, principles, and step‑by‑step instructions for using a non‑intrusive domestic mirror to accelerate WebRTC dependency synchronization and compilation across macOS, iOS, Linux, Android, and Windows platforms, including proxy configuration and repository URL replacement.
This article explains how JavaScript Proxy can intercept object operations to implement getter/setter shortcuts, dynamic validation, logging, and flexible API proxies, providing clear code examples and practical scenarios for both front‑end and Node.js development.
This guide explains how to set up a proxy machine, configure proxy environment variables on Linux, and test the proxy to ensure Minikube can access external resources, while reminding users to open the necessary proxy ports on the server.
This article explains what cross‑origin requests are and presents four practical solutions—webpack proxyTable, SwitchHosts, Uuaper, and Nginx—detailing configuration steps, common pitfalls, and code examples to help developers overcome CORS problems during local development.
This article explains the fundamentals of forward and reverse proxies, compares their characteristics and differences, and provides practical Nginx configuration examples for implementing reverse proxy, load balancing, and cross‑origin handling in web applications.
This comprehensive guide walks you through setting up Nginx on CentOS, explains what Nginx is and why it outperforms other HTTP servers, covers installation, core configuration, static file serving, caching, cross‑origin handling, hotlink protection, proxying, load balancing algorithms, and common troubleshooting tips.
This article explains how Nginx was created to overcome Apache's limitations, describes its role as a high‑performance HTTP and reverse‑proxy server, clarifies forward and reverse proxy concepts, outlines common deployment scenarios, compares load‑balancing algorithms, and provides a feature comparison with other web servers.
