DataparkSearch has the RESTfull interface, though it's available only in the upcoming 4.54 version (you can try it in the latest snapshot). Using DataparkSearch templates you can get the search results practically in any text based format you need to process.
Googlebot is Google's web crawling bot (sometimes also called a "spider"). Crawling is the process by which Googlebot discovers new and updated pages to be added to the Google index. We use a huge set of computers to fetch (or "crawl") billions of pages on the web.
Heritrix is a web crawler designed for web archiving. It was written by the Internet Archive. It is available under a free software license and written in Java. The main interface is accessible using a web browser, and there is a command-line tool that can optionally be used to initiate crawls.
Hierarchical Cluster as engine: Provides hierarchical cluster infrastructure – nodes connection schema, relations between nodes, roles of nodes, requests typification and data processing sequences algorithms, data sharding modes, and so on. Provides network transport layer for data of client application and administration management messages.
Scheduler: OpenSearchServer's scheduler is a highly customizable tool to set up reccurent processes. This picture shows these main concepts: So far, so good? Let's start working with our example site. Set up the index and the crawler Index creation and configuration. Let's start by creating an index. An index is the heart of OpenSearchServer.
Xenu’s not just a great tool to look inside your own site, it’s also pretty powerful for crawling external resources like directories, particularly if you’re looking for a domain to buy. Try crawling dmoz.org, being sure to restrict Xenu’s access to “editors.dmoz.org”, but allow the crawler to “check external links”.