private bool TryRead(LogEventReader reader, out LogEvent evt)
{
try
{
return(reader.TryRead(out evt));
}
catch (JsonReaderException ex)
{
// As we are reading/streaming one line at a time in the JSON file
// Thus we can not report the line number, as it will always be 1
_logger.Error <JsonLogViewer>(ex, "Unable to parse a line in the JSON log file");
evt = null;
return(true);
}
}
public void AllEventsAreRead()
{
var all = new List <LogEvent>();
using (var clef = File.OpenText("LogEventReaderTests.clef"))
{
var reader = new LogEventReader(clef);
LogEvent evt;
while (reader.TryRead(out evt))
{
all.Add(evt);
}
}
Assert.Equal(5, all.Count);
}
public IActionResult GetSystemLog()
{
List <LogEvent> logs = new List <LogEvent>();
// configure strongly typed settings objects
var logPath = Configuration.GetSection("AppSettings").Get <AppSettings>().LogPath;
DirectoryInfo di = new DirectoryInfo(logPath);
di = di.Parent;
DateTime now = DateTime.Now;
var patternYesterday = $"log-{now.AddDays(-1).ToString("yyyyMMdd")}*.log";
var patternToday = $"log-{now.ToString("yyyyMMdd")}*.log";
//get log files and sort
var yesterdayLogs = di.GetFiles(patternYesterday).ToList();
var todayLogs = di.GetFiles(patternToday).ToList();
yesterdayLogs = yesterdayLogs.OrderBy(o => o.CreationTime).ToList();
todayLogs = todayLogs.OrderBy(o => o.CreationTime).ToList();
List <FileInfo> logfiles = new List <FileInfo>();
logfiles.AddRange(yesterdayLogs);
logfiles.AddRange(todayLogs);
string result = string.Empty;
foreach (var fi in logfiles)
{
using (var clef = System.IO.File.Open(fi.FullName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
TextReader tr = new StreamReader(clef);
var reader = new LogEventReader(tr);
LogEvent evt;
while (reader.TryRead(out evt))
{
logs.Add(evt);
}
}
}
logs.Reverse();
return(Ok(new { Logs = logs }));
}
public IEnumerable <LogEvent> GetAllLogs()
{
var logs = new List <LogEvent>();
using (var fs = new FileStream(Constants.LOG_PATH, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (var sr = new StreamReader(fs))
{
var reader = new LogEventReader(sr);
LogEvent evt;
while (reader.TryRead(out evt))
{
if (evt.Properties.ContainsKey("TaskId"))
{
logs.Add(evt);
}
}
}
}
return(logs);
}
public static void Main(string[] args)
{
using (var fileLog = new LoggerConfiguration()
.WriteTo.File(new CompactJsonFormatter(), "log.clef")
.CreateLogger())
{
fileLog.Information("Hello, {@User}", new { Name = "nblumhardt", Id = 101 });
fileLog.Information("Number {N:x8}", 42);
fileLog.Warning("Tags are {Tags}", new[] { "test", "orange" });
try
{
throw new DivideByZeroException();
}
catch (Exception ex)
{
fileLog.Error(ex, "Something failed");
}
}
using (var console = new LoggerConfiguration()
.WriteTo.LiterateConsole()
.CreateLogger())
{
using (var clef = File.OpenText("log.clef"))
{
var reader = new LogEventReader(clef);
LogEvent evt;
while (reader.TryRead(out evt))
{
console.Write(evt);
}
}
}
File.Delete("log.clef");
}
