如何从Grails应用程序访问日志目录内的文件？ [英] how to access a file inside logs directory from grails application?

问题描述

我只是试图在Grails的日志目录中打印最新日志文件的内容。 command.execute（）。text正在返回空白。所以我一定在做错事。我感谢任何帮助！谢谢！

I am simply trying to print the content of the latest log file inside the logs directory from Grails. command.execute().text is returning empty. so I must be doing something wrong. I appreciate any help! Thanks!

def command = "cat \$(ls logs/localhost_access_log* | tail -1)"     

println command.execute().text

推荐答案

制作一个复杂的cmdline字符串，为什么不用groovy / java工具编程呢？

instead of making a complex cmdline string, why not just program it with the groovy/java tools?

// find real directory of logs folder
def dir = new File(ServletContextHolder.servletContext.getRealPath('logs'))
// inside logs folder look for newest file beginning with "localhost_access"
def file = dir.listFiles({ name -> name.startsWith('localhost_access') } as FilenameFilter).max({ it.lastModified() })
def content = null
if (file) {
    // read content directly
    def content = file.text
    // or via a process
    def content = new ProcessBuilder('cat', file.absolutePath).start().text
}

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