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Improvements and fixes to HttpRobotRulesParser when following redirects#1103
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- remove unsafe check for absolute URLs on redirects (location header) - resolve relative redirects using the redirect source as base URL - cache robot rules for all /robots.txt (if on default location) in a chain of redirects Signed-off-by: Sebastian Nagel <sebastian@commoncrawl.org>
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httpis not necessarily a valid and resolvable URL. For safety, always resolve the redirect location using java.net.URL(URL context, String spec)/robots.txt(if on default location) in a chain of redirectsNote: this PR is a result of implementing the RFC 9309 redirect rules to Nutch, see NUTCH-2990 and apache/nutch#779. I deliberately took the implementation in StormCrawler (#1058/#1074) as a starting point.