Is web scraping legal?
Web scraping of publicly accessible data (no login required, no authentication bypassed) is generally legal in the USA, EU, and most jurisdictions the hiQ v. LinkedIn ruling (9th Circuit, 2022) affirmed that scraping publicly available data does not violate the Computer Fraud and Abuse Act. The legal considerations are: Terms of Service (most websites' ToS prohibit scraping violating ToS is a contract breach but typically not a criminal offence for public data; ClickMasters advises on the legal risk profile of specific targets), GDPR/CCPA (scraping personal data of EU or California residents requires a lawful basis business contact information in professional directories has a legitimate interest basis in many cases but requires careful analysis), and copyright (scraped content may be copyright-protected extracting structured data facts is generally acceptable, reproducing full copyrighted text is not). ClickMasters reviews ToS and legal considerations for each scraping target before building.
What is the difference between Playwright and Scrapy for web scraping?
Scrapy is an asynchronous Python spider framework optimised for high-throughput scraping of server-rendered HTML it is fast, memory-efficient, and well-suited for static HTML pages where the data is in the page source. Playwright is a browser automation library that runs a full Chromium/Firefox/WebKit browser it handles JavaScript-rendered content (React SPAs, dynamically loaded data, infinite scroll) that Scrapy cannot access because Scrapy only sees the server's HTML response, not the page after JavaScript execution. ClickMasters uses Scrapy for high-volume static HTML scraping (news sites, product catalogues, directories) and Playwright for JavaScript-heavy sites (modern SPAs, sites with dynamic loading, sites requiring JavaScript interaction to reveal data). For anti-detection requirements, Playwright with stealth plugins is more effective than Scrapy's built-in features.
How do you handle sites that block scraping?
Anti-bot blocking is handled at several layers. Rate limiting: human-realistic request timing (random delays following a Poisson distribution 2-8 seconds between requests, occasionally pausing for 30-60 seconds to simulate reading) rather than fixed intervals that are statistically detectable. User agent rotation: rotating realistic, up-to-date browser user agent strings matched to the proxy's apparent browser type. Proxy rotation: residential proxies (Oxylabs, Bright Data) provide IP addresses from real ISPs significantly harder to block than datacenter proxies. Browser fingerprint masking: Playwright stealth plugin patches headless browser detection removes webdriver properties, patches navigator.plugins, WebGL, canvas fingerprint. Session management: maintain cookies and session state across requests appear as a returning user rather than a fresh connection on every request. CAPTCHA solving: 2captcha or Anti-Captcha API for sites with CAPTCHA challenges used only where legally appropriate.
How do you structure and deliver scraped data?
Scraped data is structured and delivered via: schema design (define the exact fields to extract product name, price, availability, URL, last updated with data types and validation rules before writing the crawler), data validation (validate extracted fields against the schema required fields must be present, numeric prices within expected ranges, URLs valid reject or flag invalid records before storage), storage (PostgreSQL for structured queryable data, S3 for raw HTML backups and change history), and delivery (REST API for real-time access to the extracted data, scheduled CSV/Excel export to S3 for downstream consumption, direct database connection for BI tools, webhook notification on significant data changes). ClickMasters designs the delivery mechanism to match the consuming system data warehouse, BI tool, CRM, or ERP rather than requiring the client to build their own ETL from raw scraped files.
