/// <summary>
/// Verifies the semantic rule
/// </summary>
/// <param name="context">The Interop service context</param>
/// <param name="info">out parameter to return violation information when rule does not pass</param>
/// <returns>true if rule passes; false otherwise</returns>
public override bool?Verify(ServiceContext context, out ExtensionRuleViolationInfo info)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
info = null;
bool?passed = null;
if (FeedCore2001.IsNextLinkPresent(context))
{
passed = true;
}
else
{
passed = !FeedCore2001.IsPartialColleclection(context);
if (!passed.Value)
{
info = new ExtensionRuleViolationInfo(Resource.PayloadExpectingNextLink, context.Destination, context.ResponsePayload);
}
}
return(passed);
}
/// <summary>
/// Checks whether the context payload is a partial collection of entrities
/// </summary>
/// <param name="context">The service context</param>
/// <returns>True if it is partial collection; false otherwise</returns>
private static bool IsPartialColleclection(ServiceContext context)
{
bool anyNewEntry = false;
JObject contextResponse = JsonParserHelper.GetResponseObject(context);
if (contextResponse != null)
{
JArray contextEntries = JsonParserHelper.GetEntries(contextResponse);
if (contextEntries.Count > 0)
{
// if any more entries return, the context response payload was a partial collection
Uri prober = FeedCore2001.ConstructProbeUri(context);
var resp = WebHelper.Get(prober, Constants.AcceptHeaderJson, RuleEngineSetting.Instance().DefaultMaximumPayloadSize, context.RequestHeaders);
if (resp == null || string.IsNullOrEmpty(resp.ResponsePayload) || !JsonHelper.IsJsonVerboseFeed(resp.ResponsePayload))
{
return(false);
}
JObject response = JsonParserHelper.GetResponseObject(resp.ResponsePayload);
if (response != null)
{
JArray entries = JsonParserHelper.GetEntries(response);
if (entries.Count > 0)
{
// some producers do not respect $skipton;
// need to look at each entry to see whether there is any new entry.
HashSet <string> contextEntryKeys = new HashSet <string>(EqualityComparer <string> .Default);
foreach (var e in contextEntries)
{
if (e.Type == JTokenType.Object)
{
var i = JsonParserHelper.GetTokenOfEntry((JObject)e);
contextEntryKeys.Add(i);
}
}
foreach (var e in entries)
{
if (e.Type == JTokenType.Object)
{
var i = JsonParserHelper.GetTokenOfEntry((JObject)e);
if (!contextEntryKeys.Contains(i))
{
anyNewEntry = true;
break;
}
}
}
}
}
}
}
return(anyNewEntry);
}