public static TraceContext New()
{
var context = new TraceContext
{
TraceId = SodiumCore.GetRandomBytes(16),
ParentId = SodiumCore.GetRandomBytes(8),
Flags = TraceFlags.None
};
return(context);
}
//
// See: https://www.w3.org/TR/trace-context/#problem-statement
public static IApplicationBuilder UseTraceContext(this IApplicationBuilder app)
{
app.Use(async(context, next) =>
{
if (!context.Request.Headers.TryGetValue(HttpHeaders.TraceParent, out var traceContext))
{
context.Request.Headers.Add(HttpHeaders.TraceParent,
traceContext = TraceContext.New().Header);
}
context.TraceIdentifier = traceContext;
if (app.ApplicationServices.GetService(typeof(IHttpContextAccessor)) is IHttpContextAccessor accessor)
{
accessor.HttpContext = context;
}
await next();
});
return(app);
}