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Elastic search -- Rest style operation index, mapping and document ElasticSearch provides a REST API that can be accessed through HTTP and JSON. 1. Index operation 1. Basic operations of index: PUT /Index name Create index DELETE /Index name delete index DELETE /* Delete all indexes GET /Index name View specified index i ...

1, What is a reptile? The essence of a crawler is an application that sends a request to a website or URL, obtains resources, analyzes and extracts useful data. Can be used to obtain text data, can also be used to download pictures or music. Crawlers can verify hyperlinks and HTML code for web crawling. Web search engines and other sites updat ...

Blog direct in the last section! After obtaining the web page, the next step is to analyze the data. We need to be familiar with the basic operation of regular expressions. Here is a tutorial entrance. Students without knowledge reserve can go to this channel first regular expression You can only look at the simplest "grammar" sec ...