We need to poll a web page every 5 minutes and the web page is growing rather large. The web page is a directory listing and we need the last line (to get a file name). What is the best way to get just this last line?We need to poll a web page every 5 minutes and
阅读背景：
是否可以读取大型网页的最后几行（或1000个字符）？
来源：互联网
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