Scrapy Middleware: Engineering Resilient Proxy...

The silence of a stalled spider is a sound every data engineer knows too well. You’ve refined your XPath selectors, optimized your asynchronous pipelines, and battle-tested your concurrency settings. Yet, five minutes into the crawl, the 403 Forbidden errors start cascading. The target site hasn’t just noticed you; it has systematically dismantled your session. In the world of high-stakes web scraping, an IP address is a consumable resource. If you aren’t rotating, you aren’t scaling. But simply