async Task <IResponse> PrepareAsync(IRequester requester, Url url, CancellationToken cancel)
{
if (_parserInserted && !IsAsync)
{
if (IsDeferred)
{
Owner.AddScript(this);
}
}
else if (!IsAsync && !_forceAsync)
{
//Add to end of list of scripts (in order) --> sufficient
Owner.AddScript(this);
}
else
{
//Just add to the set of scripts
Owner.AddScript(this);
}
var response = await requester.LoadWithCorsAsync(url, CrossOrigin.ToEnum(CorsSetting.None), Owner.Origin, OriginBehavior.Taint, cancel);
if (_parserInserted && !IsAsync)
{
_readyToBeExecuted = true;
}
return(response);
}
async Task LoadScriptAsync(IResourceLoader loader, ResourceRequest request)
{
var setting = CrossOrigin.ToEnum(CorsSetting.None);
var behavior = OriginBehavior.Taint;
var response = await loader.FetchWithCorsAsync(request, setting, behavior).ConfigureAwait(false);
var completion = new TaskCompletionSource <Boolean>();
_runScript = () =>
{
RunFromResponse(response);
response.Dispose();
completion.SetResult(true);
};
await completion.Task.ConfigureAwait(false);
}
Boolean InvokeLoadingScript(Url url)
{
var fromParser = true;
//Just add to the (end of) set of scripts
if ((_parserInserted && IsDeferred && !IsAsync) || !_parserInserted || IsAsync)
{
Owner.AddScript(this);
fromParser = false;
}
var request = this.CreateRequestFor(url);
var setting = CrossOrigin.ToEnum(CorsSetting.None);
var behavior = OriginBehavior.Taint;
this.CreateTask(async c =>
{
var response = await Owner.Loader.FetchWithCorsAsync(request, setting, behavior, c).ConfigureAwait(false);
if (response != null)
{
_runScript = () =>
{
RunFromResponse(response);
response.Dispose();
};
}
else
{
FireErrorEvent();
}
return(response);
});
return(fromParser);
}
/// <summary>
/// More information available at:
/// http://www.w3.org/TR/html5/scripting-1.html#prepare-a-script
/// </summary>
internal void Prepare()
{
var options = Owner.Options;
if (_started)
{
return;
}
_wasParserInserted = _parserInserted;
_parserInserted = false;
_forceAsync = _wasParserInserted && !IsAsync;
if ((String.IsNullOrEmpty(Source) && String.IsNullOrEmpty(Text)) || Owner == null)
{
return;
}
if (options.GetScriptEngine(ScriptLanguage) == null)
{
return;
}
if (_wasParserInserted)
{
_parserInserted = true;
_forceAsync = false;
}
_started = true;
if (!Owner.Options.IsScripting)
{
return;
}
var eventAttr = GetAttribute(AttributeNames.Event);
var forAttr = GetAttribute(AttributeNames.For);
if (!String.IsNullOrEmpty(eventAttr) && !String.IsNullOrEmpty(forAttr))
{
eventAttr = eventAttr.Trim();
forAttr = forAttr.Trim();
if (eventAttr.EndsWith("()"))
{
eventAttr = eventAttr.Substring(0, eventAttr.Length - 2);
}
if (!forAttr.Equals(AttributeNames.Window, StringComparison.OrdinalIgnoreCase) || !eventAttr.Equals("onload", StringComparison.OrdinalIgnoreCase))
{
return;
}
}
var src = Source;
if (src != null)
{
if (src == String.Empty)
{
Owner.QueueTask(Error);
return;
}
var url = this.HyperRef(src);
var requester = options.GetRequester(url.Scheme);
if (requester == null)
{
return;
}
_load = requester.LoadWithCorsAsync(url, CrossOrigin.ToEnum(CorsSetting.None), Owner.Origin, OriginBehavior.Taint);
if (_parserInserted && !IsAsync)
{
if (IsDeferred)
{
Owner.AddScript(this);
}
_load.ContinueWith(task => _readyToBeExecuted = true);
}
else if (!IsAsync && !_forceAsync)
{
//The element must be added to the end of the list of scripts that will execute in order as soon as possible associated
//with the Document of the script element at the time the prepare a script algorithm started.
Owner.AddScript(this);
}
else
{
//The element must be added to the set of scripts that will execute as soon as possible of the Document of the
//script element at the time the prepare a script algorithm started.
Owner.AddScript(this);
}
}
else if (_parserInserted)
{
//and either the parser that created the script is an XML parser or it's an HTML parser whose script nesting level is
//not greater than one, and the Document of the HTML parser or XML parser that created the script element has a style
//sheet that is blocking scripts
_readyToBeExecuted = true;
//TODO do not run immediately, i.e. remove the following line
options.RunScript(Text, CreateOptions(), ScriptLanguage);
}
else
{
options.RunScript(Text, CreateOptions(), ScriptLanguage);
}
}
