The Allegro Listings Scraper enables quick and efficient data extraction from allegro.pl, allegro.cz, and allegro.sk. It gathers information from listing pages on one of Europe’s leading e-commerce marketplaces, providing valuable insights for market analysis and price monitoring.
Save records page by page; retain earlier results and fail the run if a later page fails.
Serialize dataset writes and enforce both total-input and paid-result limits.
Deduplicate offers per source and validate input before making provider requests.
Parse embedded JSON safely when titles contain braces or escaped quotes.
Preserve embedded Allegro Lokalnie listings and avoid double-decoding tracking URLs.
Add offer/product IDs, timestamps, marketplace, page position, seller feedback, delivery cost and price including delivery.
Preserve purchase-count labels and explanations; distinguish known product-wide popularity from unknown scope.
Return null for unavailable optional values instead of fabricated zeros/false flags. Required price/identity failures mark extraction incomplete.
Add explicit page/concurrency controls and a RUN-SUMMARY with source completion and provider-credit metrics.
Respect starting page numbers above 100, subject to source pagination and the configured page limit.
Add offline regression/lifecycle tests and a bounded live benchmark.
Compatibility: existing output keys remain, but optional fields can now be null. Duplicate rows within one source are removed. Consumers relying on zero/false defaults or duplicate counts should adjust before upgrading. Direct offer scraping, EAN lookup and automatic price-history/resume remain outside this release.
