This article explains the fundamentals of HTTP caching, covering forced and conditional cache strategies, key response headers like Cache-Control, Expires, ETag, and Last-Modified, and demonstrates how browsers decide when to serve cached content versus fetching fresh data.
This comprehensive guide walks you through the fundamentals of HTTP, covering its definition, hypertext, transfer, protocol layers, related components like browsers and servers, request‑response flow, methods, headers, status codes, content negotiation, and security extensions such as HTTPS and WAF.
This article provides a thorough introduction to the HTTP protocol, covering basic networking concepts, the OSI/TCP‑IP models, the structure and components of request and response messages, differences between HTTP/1.0 and HTTP/1.1, HTTP versus HTTPS, and long‑connection handling, illustrated with diagrams and code examples.
This article provides a comprehensive introduction to Python web scraping, covering the fundamental concepts of spiders, HTTP/HTTPS protocols, the Requests library usage, custom headers, proxies, cookies, and various data extraction techniques such as JSON parsing, XPath, and regular expressions.
This article explains how to use Spring's RestTemplate to perform GET, POST, PUT, and DELETE HTTP calls, compares getForObject with getForEntity, demonstrates parameter passing styles, and shows how to handle redirects with postForLocation, providing complete code examples for each operation.
This article explains the technical differences between RPC and HTTP services, covering the OSI model, RPC architecture, synchronous versus asynchronous calls, and compares popular frameworks like gRPC, Thrift, and Dubbo to help developers choose the right approach for large‑scale systems.
This article provides a comprehensive walkthrough of OpenFeign’s request processing pipeline, covering dynamic proxy generation, annotation parsing, method handler routing, request template building, interceptor execution, logging, client implementation, and Spring Cloud OpenFeign extensions such as Hystrix and Sentinel, illustrated with code snippets and diagrams.
This article explains the RESTful architectural style, its core principles such as resource identification, representation, state transfer, uniform interface, and statelessness, and describes how HTTP methods and Java frameworks like Restlet enable building scalable, layered backend web services.
This article reviews the most common IoT communication protocols—MQTT, CoAP, HTTP, XMPP, and SOAP—explaining their architectures, key features, message models, and practical differences to help developers choose the most suitable protocol for their IoT applications.
This article provides a concise overview of the most frequently used HTTP status codes, explaining the meaning of each 1xx, 2xx, 3xx, 4xx, and 5xx series and detailing individual codes such as 200, 201, 301, 404, and 500 to help developers interpret server responses correctly.
This guide walks you through practical cURL commands on Linux, covering file downloads, redirects, resume support, timeout settings, form submissions, email handling, and key differences from wget, all illustrated with clear examples and screenshots.
This article explains how to implement request‑ID tagging for each API call in a Java performance‑testing framework, describes the updated MarkRequest implementations, shows how to configure connection‑pool timeouts and retries, and provides full source code examples for both header‑based and string‑based markers.
This article presents a comprehensive guide to HTTP performance optimization, covering encoding efficiency, channel utilization, transport path enhancements, and security improvements, enabling developers and operators to reduce latency, save bandwidth, and handle massive concurrency effectively.
This comprehensive guide walks you through the fundamentals of HTTP, covering its definition, protocol stack, request‑response flow, methods, headers, content negotiation, and the protocol's strengths and weaknesses, providing clear examples and diagrams to deepen your understanding of web communication.
This article explains how to conduct proportional load testing for a microservice that exposes several APIs by using a custom Java performance‑testing framework, covering request deep‑copy handling, MarkRequest cloning, and a complete code example that drives concurrent requests according to a 1:2:3 ratio.
This article explains how to generate, propagate, and log unique request IDs across multithreaded HTTP calls in a Java performance‑testing framework, providing a MarkRequest interface, a RequestThreadTimes implementation, and a runnable demo that captures request‑ID timestamps for analysis.
This article traces the evolution of HTTP from its early versions to HTTP/2 and QUIC, explains the shortcomings of HTTP/1.1 such as head‑of‑line blocking and lack of encryption, details the performance‑boosting features of SPDY, HTTP/2 and QUIC, and discusses the remaining challenges like connection latency, server load, and NAT traversal.
This article explores how recent Python performance improvements and the ultra‑fast Japronto microframework enable handling over a million HTTP requests per second, detailing benchmark results, HTTP pipelining optimizations, C extensions, memory management tricks, and the underlying technologies that make such throughput possible.
The article outlines four key dimensions for extreme HTTP performance optimization—encoding efficiency, channel utilization, transmission path, and information security—explaining how advances like binary encoding, multiplexed streams, TCP/QUIC tuning, and TLS 1.3 together reduce latency, boost concurrency, and enhance user experience.
This guide explains how Laravel middleware filters HTTP requests, shows how to create custom middleware with artisan, demonstrates pre‑ and post‑processing, registers global and route middleware, configures middleware groups, priority ordering, parameter passing, and terminable middleware for advanced request handling.
This article walks through the essential concepts and step‑by‑step processes of DNS resolution and HTTP communication, illustrating how a browser transforms a URL into an IP address, queries multiple name servers, and finally retrieves web content via HTTP requests.
This article explains the shift from GUI‑centric automation to API testing, outlines its importance in agile development, describes the test pyramid, covers HTTP and REST fundamentals, and provides practical guidance for functional, load, and tool selection in API testing.
This article explains the fundamentals of TCP/IP networking, including the protocol layering model, the TCP three‑way handshake and four‑way termination, differences between TCP and UDP, and how HTTP operates as a short‑lived, stateless protocol built on top of TCP.
Through a narrative of a college student and her mother whose chat is intercepted and altered by a hacker, the article illustrates why plain HTTP is vulnerable, explains the principles of symmetric and asymmetric encryption, TLS/SSL, and how certificates and hybrid encryption secure modern communications.
This tutorial provides a comprehensive guide to using the cURL command-line tool on Linux, covering basic file downloads, following redirects, resuming interrupted transfers, setting timeouts, authentication, proxy usage, range requests, silent mode, header manipulation, data uploading, email sending, and a comparison with wget, all illustrated with practical examples and code snippets.
The article argues that while middleware can simplify handling cross‑cutting concerns in HTTP APIs, overusing it leads to tangled, untestable code, and proposes refactoring middleware logic into pure functions with explicit inputs and outputs to improve clarity and maintainability.
The article shares the author's journey from manual data collection to mastering Java web crawlers, explains why Java is preferred over Python, outlines the five-step crawling workflow, covers essential Java basics, HTTP fundamentals, and provides code examples for URL queuing, time parsing, and timestamp conversion.
This article demonstrates how to automate e‑commerce test data creation by retrieving schema information with SQLAlchemy ORM, defining mapping classes, generating realistic data using Faker, and submitting it via HTTP requests with the Requests library, covering database interactions, data assembly, and API communication.
This article explains the concept, types, lifecycle, and security considerations of HTTP cookies, illustrates how browsers store and send cookies, describes the cookie‑jar model, domain handling, and related CORS mechanisms, and provides practical JavaScript examples.
This article explains the fundamentals of browser HTTP caching, detailing request and response structures, the processes of forced and negotiated caching, cache-control directives like Expires and Cache-Control, and how browsers store and retrieve resources from memory and disk caches.
This article explains the REST architectural style, its basic concepts, differences from SOAP, the Richardson maturity model, HTTP verbs, response codes, resource specifications, popular implementations, client tools, and recommended books for building robust web APIs.
This article explains the step‑by‑step process from entering a URL to page rendering, focusing on TCP connection reuse, HTTP persistent connections, pipelining, HTTP/2 multiplexing, SSL session reuse, and browser limits on simultaneous connections for pages with many images.
The article explains how modern browsers manage TCP connections for HTTP requests, covering persistent connections, the number of requests per connection, pipelining limitations in HTTP/1.1, the advantages of HTTP/2 multiplexing, SSL reuse, and browser-imposed limits on concurrent connections per host.
This article explains how HTTP relies on TCP/IP, describes the browser's steps to open a TCP connection, details TCP segment and IP packet structures, outlines socket API calls, and discusses TCP handshake, slow start, and HTTP connection techniques such as parallel, persistent, and pipelined connections.
This article provides a comprehensive guide to caching technologies, covering HTTP caching, CDN caching, load‑balancer caching, in‑process caching, and distributed caching, while explaining strategies, algorithms, and common pitfalls such as cache avalanche, penetration, and breakdown.
This article explains how Nginx parses its configuration file by introducing the core data structures ngx_conf_t and ngx_command_t, describing the versatile ngx_conf_parse function, and detailing the step‑by‑step processing of HTTP, server, and location blocks, including conflict resolution.
The weekly roundup presents concise, actionable articles on font fundamentals, building an AST for arithmetic expressions, cyclomatic complexity metrics, the evolution from HTTP/2 to HTTP/3, native image lazy‑loading, and an overview of CSS Level‑4 selectors, all aimed at front‑end engineers.
This article examines why occasional ECONNRESET errors occur in HTTP RPC keep‑alive connections, explains the underlying TCP and OS mechanisms, and compares several practical mitigation strategies—including retries, connection pre‑discard, idempotent handling, and protocol upgrades such as HTTP/2 and gRPC—to help developers choose the most reliable solution.
An open‑source Java crawler that fetches historical‑today events from a public API is presented, detailing three practical challenges—GET request length limits, ambiguous JSON value types, and month string construction—along with a full code example and a GitHub repository link for reference.
This article explains why URLs and their parameters must be encoded during testing, covering readability, completeness, reserved characters, non‑ASCII symbols, and unsafe characters, and provides practical examples to ensure reliable data transmission and correct parameter parsing.
The article presents a Java/Groovy script that crawls a website offering curated e‑books, extracts book details such as title, author, and download links using HTTP requests and regular expressions, and then inserts the collected information into a MySQL database.
The series teaches mobile developers how to use Chrome’s Network panel and Wireshark, explains connection keep-alive, demonstrates HTTP 1.x head-of-line blocking with Go and OkHttp, and clarifies fixed-length versus chunked body transfer, providing practical code and traffic analysis for deeper protocol understanding.
This article walks through improving a Java GET‑parameter concatenation utility by overloading methods, handling Chinese characters with java.net.URLEncoder, and providing reusable code for converting JSON or Map arguments into properly encoded query strings for HttpClient requests.
This article breaks down the five essential questions about how modern browsers handle TCP connections, persistent HTTP requests, pipelining, SSL reuse, and per‑host connection limits when downloading dozens of images on a webpage.
After uncovering an unprotected API that allowed unlimited resource access, the author created a rough Java program that uses a fixed-size thread pool and CountDownLatch to fetch 100 000 items in parallel, retrieving 10 000 records per thread via HTTP GET requests.
The article explains why CORS distinguishes between simple requests—limited to GET, HEAD, POST with specific headers and content types—and preflighted requests, describing the server‑side rationale, the mechanics of preflight, and why avoiding preflight for simple requests simplifies cross‑origin interactions.
This article explains the HTTP Content-Type header, outlines common media type values, and demonstrates how Spring MVC's RequestMapping annotation uses the consumes and produces attributes to filter requests and responses based on Content-Type, including practical code examples.
This article explains why forcing a download dialog while preserving the original (possibly non‑ASCII) filename requires special handling of the Content‑Disposition header, reviews relevant RFCs, compares browser behaviours, and provides a standards‑compliant solution using RFC 5987 encoding.
This guide shows how to replace outdated GET calls with a POST request to the Turing Robot API using Java's HttpClient, explains recent changes to the service, and provides a full, ready‑to‑run code example for retrieving chatbot replies.
This article explains the origin, purpose, and inner workings of HTTP cookies, details their attributes and security implications, demonstrates how to create, retrieve, and set cookies with Python's requests library, and compares cookies with server‑side sessions for robust web development.
This comprehensive guide explains what web crawlers are, walks through HTTP request/response fundamentals, introduces essential Python modules like requests, re, XPath, BeautifulSoup, and threading, provides practical code examples, and details how to use the Scrapy framework—including its architecture, components, distributed crawling, and useful auxiliary tools.
This tutorial continues the mica-http complete guide, showcasing the new v1.1.7 release with proxy, retry, page crawling, model visualization, results, documentation links, and open‑source tool recommendations for building efficient backend crawlers.
mica-http is a Java wrapper for OkHttp that offers a fluent‑style HTTP client, showing Maven/Gradle integration, global logging configuration, synchronous and asynchronous request examples, and advanced features like header, cookie, query, form handling, and response processing with Jackson and Jsoup.
This article compares Spring's traditional RestTemplate blocking client with the newer reactive WebClient non‑blocking client, explaining their underlying mechanisms, performance differences under concurrency, and provides complete code examples for both approaches, helping developers choose the appropriate tool for efficient HTTP calls.
The article describes a Java performance testing framework that was refactored from a request‑based to a method‑based design, introducing a ThreadBase class and specialized adapters for HTTP requests, database queries, and concurrent execution, and discusses the advantages of code‑based concurrency and Groovy.
This comprehensive article explains the origins of HTTP, its relationship with the TCP/IP protocol suite, the three‑way handshake for establishing connections, the structure of HTTP request and response messages, status codes, long and short connections, and the four‑step termination process, providing essential knowledge for web development and networking interviews.
This tutorial explains how to use Spring's RestTemplate to download large files without exhausting memory, covering pitfalls of default methods, implementing a custom ResponseExtractor to stream data to disk, and adding support for resumable downloads via Range headers.
The article explains how modern browsers handle TCP connections and HTTP requests—including persistent connections, the limits on simultaneous connections per host, the (disabled) HTTP/1.1 pipelining, SSL reuse, and how HTTP/2 multiplexing improves image loading performance.
This article introduces gobox, a self‑developed lightweight Go framework that treats each module as a box, explains its HTTP request handling architecture, key components such as System, Router, SimpleRouter, ActionContext, Controller, demonstrates graceful‑restart support with gracehttp, and provides a complete runnable example with sample curl outputs.
Using Wireshark, this article dissects a complete HTTP request, explaining the TCP three‑way handshake, window scaling, SACK options, four‑step termination, and Keep‑Alive mechanisms, while illustrating each packet with screenshots and detailing how browsers may merge handshake steps for efficiency.
This article provides a comprehensive overview of the curl command-line tool, detailing its purpose, basic syntax, frequently used options, and practical examples for file downloading, uploading, and HTTP request testing, helping readers effectively leverage curl for network and data transfer tasks.
An in‑depth look at how browsers handle TCP connections during page loads, covering persistent connections, request limits per host, HTTP/1.1 pipelining, HTTP/2 multiplexing, and why SSL handshakes may be reused, illustrated with real‑world connection timing screenshots.
This article introduces Gobox, a self‑developed lightweight Go framework that treats each module as a reusable box, explains its HTTP request handling architecture—including System, Router, SimpleRouter, ActionContext, and Controller components—provides detailed code snippets, routing rules, and a complete example with graceful server restart support.
This article walks through the essential concepts of DNS and HTTP, detailing how a browser resolves a domain name to an IP address via recursive and iterative queries and then retrieves web content through HTTP request and response cycles, complete with diagrams and command examples.
The article explains the security risks of plain HTTP, introduces symmetric and asymmetric encryption, describes digital certificates, certificate authorities, digital signatures, and how they combine in HTTPS to protect data confidentiality, integrity, and authenticity during web communication.
The article describes a problem with Moco's default request extractor that fails to retrieve JSON parameters from POST requests and provides a custom Java extractor implementation that reads the request content and extracts the desired JSON field.
This article explains web crawlers—what they are, their classifications, typical use cases, and step‑by‑step workflow—covers the robots protocol, then delves into HTTP and HTTPS fundamentals, request/response structures, common methods, headers, status codes, and the security trade‑offs of HTTPS.
This article explains what HTTP cookies are, their basic operation via Set‑Cookie and Cookie headers, the standard cookie format and attributes, how to view them in browsers, and how cookies enable seamless cross‑domain redirects, illustrated with PHP code examples.
While many developers can list superficial distinctions between GET and POST, this article delves into the underlying TCP mechanics, browser and server constraints, and practical implications, revealing why the perceived differences exist and how each method truly operates in real‑world web applications.
This article chronicles the history of cURL, its creator Daniel Stenberg, the reasons behind its open‑source, free licensing, the global community that sustains it, and the personal motivations that keep the project thriving after two decades of development.
This article provides a comprehensive guide to browser caching, detailing the mechanisms of strong cache (Expires and Cache‑Control) and conditional cache (Last‑Modified, If‑Modified‑Since, and ETag), their directives, step‑by‑step workflows, status codes, and a side‑by‑side comparison to help developers optimize web performance.
This article introduces Moco, a Java‑based mock server tool, explains its purpose for early API testing and frontend development, provides step‑by‑step startup commands, showcases JSON request/response demos for various HTTP methods, outlines global configuration, and discusses its limitations.
This article compiles 17 essential Python interview questions covering basic syntax, type conversion, memory management, dictionary methods, lambda functions, os and sys modules, object copying, path handling, regex, generators, WSGI vs FastCGI, Django vs Tornado, debugging tools, Redis caching, unit testing, HTTP protocol fundamentals, request headers, and common status codes.
This article explains key networking concepts including the meaning and differences of HTTP 301/302 status codes, forward versus redirect mechanisms, TCP versus UDP characteristics, the TCP three‑way handshake, OSI layers, GET versus POST request distinctions, and multiple cross‑origin solutions such as JSONP, CORS, window.name, postMessage, and proxies.
This article provides a comprehensive overview of the HTTP protocol, covering its relationship with DNS/TCP/IP, request/response structure, methods, design principles, persistent connections, cookies, compression, caching, status codes, and the enhancements introduced in HTTP/2.
This comprehensive tutorial walks through capturing HTTP traffic with Wireshark and tcpdump, decodes raw TCP packets, explains request and response structures, explores encoding, MIME types, methods, status codes, and advanced topics such as proxies, caching, cookies, redirection, and connection management, giving developers a solid understanding of how HTTP works under the hood.
This article reviews five widely used JavaScript HTTP request libraries—Axios, Superagent, Request, Fetch, and Supertest—detailing their advantages, drawbacks, and typical use cases to help developers choose the most suitable tool for their projects.
The article explains step‑by‑step what occurs when a user types a URL, covering DNS resolution, browser caching, HTTP requests and redirects, server processing, HTML generation, resource fetching, compression, and asynchronous AJAX communication, using Facebook as a concrete example.
This comprehensive guide explains the HTTP protocol, covering its connection model, request and response message structures, common methods, URL components, version differences, header field categories, the request/response lifecycle, status code classifications, and the practical distinctions between GET and POST.
This article walks through the complete lifecycle of a web request—from entering a URL, DNS resolution, and HTTP communication, to server processing, HTML delivery, resource fetching, and AJAX interactions—explaining each step with diagrams and code examples.
This article explains how to build a lightweight Tomcat-inspired web server called MyTomcat, covering its socket service, request dispatching, HTTP request/response encapsulation, servlet mapping, and demonstrates the complete project structure with illustrative diagrams and code snippets.
This article provides a comprehensive Java tutorial for accessing Baidu's OCR service, covering prerequisite setup, Maven dependencies, token acquisition, image-to‑Base64 conversion, HTTP request construction, and performance observations for Chinese, English, and mixed‑language image recognition.
This article explains the RESTful architectural style, detailing its core constraints such as resource identification, representation, stateless state transfer, and the uniform interface, and compares REST with RPC while outlining Java frameworks and multi‑layer designs for building scalable backend web services.
This article explains the concept of FUZZ testing, describes its two main techniques, presents the design and core functions of a self‑developed FUZZ testing tool, showcases real‑world test results on SQL and HTTP interfaces, and outlines future enhancements for broader applicability.
REST, an architectural style defined by Roy Fielding, structures web APIs around resources identified by URIs, exchanged as representations, and manipulated through stateless, uniform HTTP methods that enforce constraints such as client‑server separation, caching, layered systems, and optional code‑on‑demand to ensure scalable, predictable interactions.
This article provides a thorough overview of the HTTP protocol, covering network architecture basics, the request/response model, detailed structures of request and response messages, and extra topics such as HTTP/1.1 vs HTTP/1.0, HTTPS differences, and long‑connection handling.
This comprehensive guide walks you through the core concepts of computer networking, including the OSI and TCP/IP models, detailed explanations of TCP and UDP protocols, HTTP fundamentals, socket programming, IP addressing, ICMP, ping operations, and the differences between routers, switches, cookies, sessions, and tokens.
This tutorial walks through using Python and browser developer tools to locate the NetEase Cloud Music comment API, extract encrypted request parameters, retrieve hot comments in JSON, and parse the Hot Songs chart to collect each song's name and ID with regular expressions.
Whistle is a Node.js‑based cross‑platform web debugging proxy that lets developers view and modify HTTP(S) and WebSocket traffic, offering features like host binding, request replacement, response status manipulation, script/style injection, and powerful mock data generation for front‑end development.
This article explains how to construct various HTTP response codes using a PHP script and how to emulate network anomalies such as TCP resets, packet loss, and latency with iptables and tc netem, providing practical techniques for robust backend testing.
This article explains how browsers handle CORS by distinguishing simple and non‑simple requests, the conditions that trigger a preflight OPTIONS request, the required Access‑Control response headers, and how server‑side implementations—such as Java interceptors—manage these interactions.
This article explains the fundamental differences between GET and POST requests, the dual TCP/UDP usage of DNS, the meaning of idempotence, the contrast between cookies and sessions, causes and solutions for TCP packet fragmentation, the three‑way handshake and four‑way termination, the complete HTTP request flow, long‑connection handling, TCP reliability mechanisms, detailed HTTP structure, the distinction between URI and URL, and how HTTPS secures data transmission.
This article explains the principle of HTTP pipelining, presents detailed performance tests comparing single‑thread, thread‑pool, and pipelined request methods, and provides a simple .NET implementation that demonstrates why pipelining can achieve ten‑fold speed gains over conventional HTTP keep‑alive.
This article explains the concept of HTTP pipelining, presents a series of performance tests comparing pipe, thread‑group, and asynchronous request methods on a typical PC, analyzes the results and underlying TCP behavior, and provides a simple .NET implementation for practical use.
This article explains the fundamentals of HTTPS by clarifying key terms such as HTTP, SSL/TLS, and encryption, describing how HTTP works over TCP, the differences between symmetric and asymmetric cryptography, and the core security requirements of confidentiality, integrity, authenticity, and performance.
This guide demonstrates how to programmatically log into the Super Schedule mobile app using Python, capture its JSON responses, and continuously fetch user-generated topics by mimicking the app’s HTTP requests, complete with sample code and request headers.
This article explains why plain‑HTTP traffic is vulnerable, outlines encryption tricks, describes file‑path traversal, DNS spoofing, proxy risks, HTTP error codes, POST data formats, cookie security, CSRF, XSS, JSONP, and CORS, and provides practical mitigation techniques for each threat.
This article explains how to create HTTP middleware in Go, covering request reading, trailing‑slash redirection, request‑ID injection, server header manipulation, custom ResponseWriter implementation, and handling of additional interfaces such as Push and Flush, with complete code examples.
This guide walks through creating Go middleware, showing how to read and modify requests, manage response headers with custom ResponseWriter implementations, handle edge cases like missing Write calls, and preserve additional interfaces such as http.Pusher and http.Flusher.
This article walks through using Python to log into CSDN, capture the dynamic Geek News list via its JSON API, handle request parameters, and extract article titles and links, providing concise code screenshots for a complete web‑scraping solution.
