public async Task <IEnumerable <string> > Execute(IEsiFragment fragment, EsiExecutionContext executionContext)
{
if (fragment == null)
{
throw new ArgumentNullException(nameof(fragment));
}
var fragmentType = fragment.GetType();
if (!_executors.TryGetValue(fragmentType, out var executor))
{
throw new NotSupportedException($"No executor found for type '{fragmentType}'.");
}
var pipelineDelegates = _pipelineCache.GetOrAdd(fragmentType, GetPipelineDelegates);
if (!pipelineDelegates.Any())
{
return(await executor(fragment, executionContext));
}
Task <IEnumerable <string> > Exec(IEsiFragment f, EsiExecutionContext ec) => executor(f, ec);
return(await pipelineDelegates
.Aggregate(
(ExecuteDelegate)Exec,
(next, pipeline) => async (f, ec) => await pipeline(f, ec, next))(fragment, executionContext));
}
private async Task StoreFragmentInCache(
HttpContext context, Uri pageUri, EsiExecutionContext executionContext, IEsiFragment fragment)
{
CacheControlHeaderValue.TryParse(
context.Response.Headers[HeaderNames.CacheControl], out var cacheControl);
if (ShouldSetCache(context))
{
var headers = context.Response.Headers.ToDictionary();
var pageResponse = new FragmentPageResponse(fragment, headers);
var vary = context.Response.Headers[HeaderNames.Vary];
var cacheResponse = CacheResponse.Create(pageResponse, cacheControl, vary);
await _cache.Set(pageUri, executionContext, cacheResponse);
}
}
public FragmentPageResponse(IEsiFragment fragment, IReadOnlyDictionary <string, IReadOnlyCollection <string> > headers)
{
Fragment = fragment ?? throw new ArgumentNullException(nameof(fragment));
Headers = headers;
}
public EsiTryFragment(IEsiFragment attemptFragment, IEsiFragment exceptFragment)
{
AttemptFragment = attemptFragment ?? throw new ArgumentNullException(nameof(attemptFragment));
ExceptFragment = exceptFragment ?? throw new ArgumentNullException(nameof(exceptFragment));
}
public EsiChooseFragment(IReadOnlyCollection <EsiWhenFragment> whenFragments, IEsiFragment otherwiseFragment)
{
WhenFragments = whenFragments;
OtherwiseFragment = otherwiseFragment;
}
public EsiWhenFragment(IBooleanExpression expression, IEsiFragment innerFragment)
{
Expression = expression ?? throw new ArgumentNullException(nameof(expression));
InnerFragment = innerFragment ?? throw new ArgumentNullException(nameof(innerFragment));
}
