Ecco un esempio
Startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
}
public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory, IServiceProvider serviceProvider)
{
loggerFactory.AddCustomLogger(serviceProvider.GetService<IHttpContextAccessor>());
//
}
personalizzato Logger:
public class CustomLogProvider : ILoggerProvider
{
private readonly Func<string, LogLevel, bool> _filter;
private readonly IHttpContextAccessor _accessor;
public CustomLogProvider(Func<string, LogLevel, bool> filter, IHttpContextAccessor accessor)
{
_filter = filter;
_accessor = accessor;
}
public ILogger CreateLogger(string categoryName)
{
return new CustomLogger(categoryName, _filter, _accessor);
}
public void Dispose()
{
}
}
public class CustomLogger : ILogger
{
private string _categoryName;
private Func<string, LogLevel, bool> _filter;
private readonly IHttpContextAccessor _accessor;
public CustomLogger(string categoryName, Func<string, LogLevel, bool> filter, IHttpContextAccessor accessor)
{
_categoryName = categoryName;
_filter = filter;
_accessor = accessor;
}
public IDisposable BeginScope<TState>(TState state)
{
return null;
}
public bool IsEnabled(LogLevel logLevel)
{
return (_filter == null || _filter(_categoryName, logLevel));
}
public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)
{
if (!IsEnabled(logLevel))
{
return;
}
if (formatter == null)
{
throw new ArgumentNullException(nameof(formatter));
}
var message = formatter(state, exception);
if (string.IsNullOrEmpty(message))
{
return;
}
message = $"{ logLevel }: {message}";
if (exception != null)
{
message += Environment.NewLine + Environment.NewLine + exception.ToString();
}
if(_accessor.HttpContext != null) // you should check HttpContext
{
message += Environment.NewLine + Environment.NewLine + _accessor.HttpContext.Request.Path;
}
// your implementation
}
}
public static class CustomLoggerExtensions
{
public static ILoggerFactory AddCustomLogger(this ILoggerFactory factory, IHttpContextAccessor accessor,
Func<string, LogLevel, bool> filter = null)
{
factory.AddProvider(new CustomLogProvider(filter, accessor));
return factory;
}
}
Anche se sopra modo in cui funziona, io preferirei attuare personalizzato IRequestLogger
invece di iniettare HttpContextAccessor
. L'implementazione è come qui di seguito (che non è testato):
public interface IRequestLogger<T>
{
void Log(LogLevel logLevel, EventId eventId, string message); // you can change this
}
public class RequestLogger<T> : IRequestLogger<T>
{
private readonly IHttpContextAccessor _accessor;
private readonly ILogger _logger;
public RequestLogger(ILogger<T> logger, IHttpContextAccessor accessor)
{
_accessor = accessor;
_logger = logger;
}
public void Log(LogLevel logLevel, EventId eventId, string message)
{
Func<object, Exception, string> _messageFormatter = (object state, Exception error) =>
{
return state.ToString();
};
_logger.Log(LogLevel.Critical, 0, new FormattedLogValues(message), null, _messageFormatter);
}
}
e di utilizzo semplice:
public class LogType
{
}
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
services.AddSingleton(typeof(IRequestLogger<>), typeof(RequestLogger<>));
}
public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory)
{
loggerFactory.AddConsole(true);
app.Run(async (context) =>
{
var requestLogger = context.RequestServices.GetService<IRequestLogger<LogType>>();
requestLogger.Log(LogLevel.Critical, 11, "<message>");
//
});
}
Mi dispiace, ho inviato la mia risposta e poi visto che mi battuto sul tempo. Questo è più completo in ogni caso, quindi ho votato. –