/// <summary>
/// A middleware used to filter requests by their Host header.
/// </summary>
/// <param name="next"></param>
/// <param name="logger"></param>
/// <param name="options"></param>
public HostFilteringMiddleware(RequestDelegate next, ILogger <HostFilteringMiddleware> logger,
IOptions <HostFilteringOptions> options)
{
_next = next ?? throw new ArgumentNullException(nameof(next));
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_options = options?.Value ?? throw new ArgumentNullException(nameof(options));
}
/// <summary>
/// A middleware used to filter requests by their Host header.
/// </summary>
/// <param name="next"></param>
/// <param name="logger"></param>
/// <param name="optionsMonitor"></param>
public HostFilteringMiddleware(RequestDelegate next, ILogger <HostFilteringMiddleware> logger,
IOptionsMonitor <HostFilteringOptions> optionsMonitor)
{
_next = next ?? throw new ArgumentNullException(nameof(next));
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_optionsMonitor = optionsMonitor ?? throw new ArgumentNullException(nameof(optionsMonitor));
_options = _optionsMonitor.CurrentValue;
_optionsMonitor.OnChange(options =>
{
// Clear the cached settings so the next EnsureConfigured will re-evaluate.
_options = options;
_allowedHosts = new List <StringSegment>();
_allowAnyNonEmptyHost = null;
});
}