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A Java Web crawler: multi-threaded, scalable, with high performance, extensible and polite. It can be used to crawl and index any web or enterprise domain and is configurable through a XML configuration file.
Yet another web crawler? Yes, but this ones uses the full power of regular expressions to accept or reject, examine or ignore, save or refuse pages. You also use MIME types to do all this. Powerful and flexible.
This project is a java web spider (web crawler) with the ability to download (and resume) files. It is also highly customizable with regular expressions and download templates. All backend functionalities are also available in a separate library.
Other spiders has a limited link depth, follows links not randomized or are combined with heavy indexing machines. This spider will has not link depth limits, randomize next url, that will be checked for new urls.
WebNews Crawler is a specific web crawler (spider, fetcher) designed to acquire and clean news articles from RSS and HTML pages. It can do a site specific extraction to extract the actual news content only, filtering out the advertising and other cruft.