Summary of web crawler technology research

Abstract

With the continuous development of network information technology, there is a large amount of unstructured data called big data on the network. Human resources to collect information laborious, so web crawler technology came into being. This paper explores the basic principle and characteristics of web crawler and the classification of current popular crawler, introduces the key technology of crawler, compares two search strategies and the current application of crawler. Finally, the future research direction of web crawler is introduced.