public async Task <IValueProvider> BindAsync(BindingContext context)
{
LoginParams loginParams = null;
HttpRequest httpRequest = context.GetHttpRequest();
if (httpRequest.HasFormContentType)
{
var form = await(httpRequest?.ReadFormAsync() ?? Task.FromResult <IFormCollection>(null));
if (form == null)
{
throw new NullReferenceException("The HTTP form could not be fetched.");
}
loginParams = new LoginParams
{
TargetLinkUri = form["target_link_uri"].ToString(),
LoginHint = form["login_hint"].ToString(),
LtiMessageHint = form["lti_message_hint"]
};
}
else
{
var query = httpRequest?.Query;
if (query == null)
{
throw new NullReferenceException("The HTTP Query could not be fetched.");
}
loginParams = new LoginParams
{
TargetLinkUri = query["target_link_uri"].ToString(),
LoginHint = query["login_hint"].ToString(),
LtiMessageHint = query["lti_message_hint"].ToString()
};
}
return(new LtiAdvantageLoginRedirectValueProvider(loginParams));
}
public Task <IValueProvider> BindAsync(BindingContext context)
{
HttpRequest httpRequest = context.GetHttpRequest();
return(Task.FromResult <IValueProvider>(new LtiResourceLinkRequestValueProvider(httpRequest)));
}
