I\'m trying to write a Owin midleware component that would LOG every incoming request and response to the database.
Here\'s how far I managed to get.
I got stu
Response Body can be logged in this manner:
public class LoggingMiddleware : OwinMiddleware
{
private static Logger log = LogManager.GetLogger("WebApi");
public LoggingMiddleware(OwinMiddleware next, IAppBuilder app)
: base(next)
{
}
public override async Task Invoke(IOwinContext context)
{
using (var db = new HermesEntities())
{
var sw = new Stopwatch();
sw.Start();
var logRequest = new log_Request
{
Body = new StreamReader(context.Request.Body).ReadToEndAsync().Result,
Headers = Json.Encode(context.Request.Headers),
IPTo = context.Request.LocalIpAddress,
IpFrom = context.Request.RemoteIpAddress,
Method = context.Request.Method,
Service = "Api",
Uri = context.Request.Uri.ToString(),
UserName = context.Request.User.Identity.Name
};
db.log_Request.Add(logRequest);
context.Request.Body.Position = 0;
Stream stream = context.Response.Body;
MemoryStream responseBuffer = new MemoryStream();
context.Response.Body = responseBuffer;
await Next.Invoke(context);
responseBuffer.Seek(0, SeekOrigin.Begin);
var responseBody = new StreamReader(responseBuffer).ReadToEnd();
//do logging
var logResponse = new log_Response
{
Headers = Json.Encode(context.Response.Headers),
Body = responseBody,
ProcessingTime = sw.Elapsed,
ResultCode = context.Response.StatusCode,
log_Request = logRequest
};
db.log_Response.Add(logResponse);
responseBuffer.Seek(0, SeekOrigin.Begin);
await responseBuffer.CopyToAsync(stream);
await db.SaveChangesAsync();
}
}
}