/// <inheritdoc />
public async Task InvokeAsync(HttpContext httpContext, RequestDelegate next)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
var requestTimeZone = this.options.DefaultRequestTimeZone;
IRequestTimeZoneProvider winningProvider = null;
if (this.options.RequestTimeZoneProviders != null)
{
foreach (var provider in this.options.RequestTimeZoneProviders)
{
var providerTimeZoneResult = await provider
.DetermineProviderTimeZoneResult(httpContext);
if (providerTimeZoneResult == null)
{
continue;
}
try
{
var result = new RequestTimeZone(providerTimeZoneResult.TimeZoneName);
if (result.TimeZone != null)
{
requestTimeZone = result;
winningProvider = provider;
break;
}
}
catch (InvalidTimeZoneException ex)
{
this.logger.LogWarning(ex, $"Invalid TimeZone Id: {providerTimeZoneResult.TimeZoneName}");
}
catch (TimeZoneNotFoundException ex)
{
this.logger.LogWarning(ex, $"TimeZone Not Found: {providerTimeZoneResult.TimeZoneName}");
}
}
}
httpContext.Features
.Set <IRequestTimeZoneFeature>(new RequestTimeZoneFeature(requestTimeZone, winningProvider));
httpContext.Response.Headers[RequestTimeZoneHeaderProvider.Headerkey] = requestTimeZone.TimeZone.Id;
DateTimeInfo.TimeZone = new ThreadLocal <TimeZoneInfo>(() => requestTimeZone.TimeZone);
await next(httpContext);
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="requestTimeZone">The <see cref="RequestTimeZone"/>.</param>
/// <param name="provider">The <see cref="IRequestTimeZoneProvider"/>.</param>
public RequestTimeZoneFeature(RequestTimeZone requestTimeZone, IRequestTimeZoneProvider provider = null)
{
this.RequestTimeZone = requestTimeZone ?? throw new ArgumentNullException(nameof(requestTimeZone));
this.Provider = provider;
}