Method of Deep Web Collection for Mobile Application Store Based on Category Keyword Searching

With the rapid development of mobile Internet, mobile Internet has come into the era of big data. The demand for data analysis of mobile applications has become more and more obvious, which puts forward higher requirements for the standard of mobile application information collection. Due to the large number of applications, almost all third-party app stores display only a small number of applications, and most of the information is hidden in the Deep Web database behind the query form. The existing crawler strategy cannot meet the demand. In order to solve the above problems, this paper proposes a collection method based on category keywords query to improve the crawl rate and integrity of the mobile app stores information collection. Firstly, get the information of application interfaces that include various kinds of applications by using the vertical crawler. Then extract the keywords that represent each category of applications by TF-IDF algorithm from the application name and description information. Finally, incremental crawling is performed by using keyword query-based acquisition method. Results show that this collection method effectively promoted information integrity and acquisition efficiency.