public static CrawlerBuilder UseDefaultService(this CrawlerBuilder builder)
{
builder.UseHtmlLoader <HtmlAgilityHelper>()
.UseHttpClient <HttpClientFactoryClient>()
.Services
.AddHttpClient()
.AddSingleton <ICrawlerFactory, DefaultCrawlerFactory>()
.AddTransient <IConfigureOptions <CrawlerContext>, CrawlerContextConfigureOptions>();
return(builder);
}
