Question

ASP.NET 5 Core MVC 应用程序在带有 Apache 的 Debian 中运行。下面的控制器用于读取日志。 Reding syslog 工作正常。读取访问和错误日志导致错误

Permission denied
Access to the path '/var/log/apache2/error.log' is denied.

System.UnauthorizedAccessException: Access to the path '/var/log/apache2/error.log' is denied.
 ---> System.IO.IOException: Permission denied
   --- End of inner exception stack trace ---
   at Interop.ThrowExceptionForIoErrno(ErrorInfo errorInfo, String path, Boolean isDirectory, Func`2 errorRewriter)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
   at System.IO.StreamReader.ValidateArgsAndOpenPath(String path, Encoding encoding, Int32 bufferSize)
...

/var/log/apache2/error.log 文件，/var 和 /log 目录被标记为每个人都可读。如何阅读这些日志？读取系统日志有效。

    public async Task<IActionResult> Syslog()
    {   // this works
        return await Logi("/var/log/syslog");
    }

    public async Task<IActionResult> Errorlog()
    { // this throws permission denied error
        return await Logi("/var/log/apache2/error.log");
    }


    static async Task<IActionResult> Logi( string fail)
    {
        StringBuilder sb = new("<html><head></head><body><pre>");
        using (StreamReader reader = new(fail))
        {
            string line;
            while ((line = await reader.ReadLineAsync()) != null)
                sb.AppendLine(line);
        }
        sb.AppendLine("</pre></body></html>");
        return new ContentResult()
        {
            Content = sb.ToString(),
            ContentType = "text/html"
        };
    }

如何读取Apache日志

0 个答案: