With TLS fingerprinting blocking 43% of automated traffic (Akamai 2023), this guide details Python’s curl_cffi library to emulate browser TLS handshakes. By cloning Chrome/Safari cipher suite orders, elliptic curve priorities, and ALPN extensions, developers achieve 99.6% JA3 hash accuracy. The solution operates 3x faster than browser automation tools while supporting dynamic fingerprint rotation based on real-world browser market data—a critical countermeasure against evolving ML-powered detection systems.

Construct a reliable proxy pool service to provide efficient proxies for thousands of crawlers, ensuring each crawler receives appropriate proxy IPs for target websites. Implement distributed deep web crawling internally to guarantee speed and reliability. Note: The company’s internal product should not be open-sourced for functionality. However, during personal time, I aim to create a simple proxy pool service using open-source tools.

Web crawlers are an excellent way to access required data, whether you want to retrieve information from websites, monitor internet changes, or use website APIs. Though they consist of many components, crawlers fundamentally follow a simple process: they download raw data, process and extract it, and then save it in files or databases if needed. You can build your spider or crawler in various programming languages using multiple approaches.

A proxy or proxy server acts as an intermediary between client devices and destination servers within computer networks. Functioning as an intermediary between local networks (LANs) and wide-area networks (like the internet), it operates through port-based traffic redirection while obscuring the server’s true IP address for enhanced security. Modern proxy implementations typically include caching mechanisms for performance optimization and may enforce access controls via IP filtering with optional data encryption during transmission. [Reference: RFC 7230 (HTTP/1.1) § 2.3]

We almost always interact with transparent proxies when using public Wi-Fi. Positioned between your device and websites, they’re also called inline, intercepting, or forced proxies. Why are they invisible? Because they require no device-level configuration. Without altering your IP address, they filter, authenticate, and cache your requests.

软件或其组件不需要图形用户界面来相互通信。程序使用机器可读接口或 API 来交换信息和功能。API代表应用程序编程接口。本文将定义 API描述操作方式。

To provide security, control, and caching capabilities, HTTP proxy servers perform two intermediary functions: acting as both an HTTP client and an HTTP server. HTTP proxies support the caching of internet data when forwarding HTTP client requests from web browsers to the internet.

IP addresses are essential for internet connectivity; without an IP address, network communication is impossible. When browsing websites, your IP address is transmitted to the sites you visit, revealing two key pieces of information: your geographic location and Internet Service Provider (ISP). This is why platforms like Weibo and Zhihu have recently implemented features to display users’ IP geolocation. Proxy IPs can mask your real IP address, enhancing privacy.