| 摘要 |
PROBLEM TO BE SOLVED: To provide a URL filtering system for extracting a URL without applying any load to a network. SOLUTION: A proxy server operating device 24 judges repetition or repetition refusal concerning an access based on the list of URL in a proxy server setting storage part 34. At the time of processing start, a cache log retrieving device 21 reads a keyword out of a keyword storage part 31, reads the URL out of a cache log storage part 32 and retrieves the presence/absence of the keyword, and when there is the keyword in the URL, the URL is stored in the proxy server setting storage part 34. When the proxy server setting storage part 34 fails the retrieval of the keyword, a cache data retrieving device 22 reads out data, and in the case of HTML file, a cache data file name is investigated. Then, the presence/absence of the keyword in the HTML data is retrieved, and when there is the keyword, since the URL is stored in the proxy server setting storage part 34, the URL can be extracted without applying any load to the network.
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