分析网页代码，提取url进行散列处理，提交客户端程序进行排重处理，然后存入客户机数据库，随后根据数据库中的url列表遍历整个网络。-Analysis of web code, extract the hashed url, submit re-schedule the client program to deal with, and then stored in the client database, and then the url list in the database through