/// <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;
//success is implied; otherwise OData error payload would have been received
//apply rule when URI path points to a single entity, properties of an entity or Media Resource
var edmxHelper = new EdmxHelper(XElement.Parse(context.MetadataDocument));
var segments = ResourcePathHelper.GetPathSegments(context);
UriType uriType;
var target = edmxHelper.GetTargetType(segments, out uriType);
bool IsUriPathApplicable = uriType == UriType.URI2 ||
uriType == UriType.URI3 ||
uriType == UriType.URI4 ||
uriType == UriType.URI5 ||
uriType == UriType.URI10 ||
uriType == UriType.URI17;
if (IsUriPathApplicable)
{
string entityName = ResourcePathHelper.GetEntityName(context);
string concurrencyProperty = ResourcePathHelper.GetConcurrencyProperty(XElement.Parse(context.MetadataDocument), entityName);
if (concurrencyProperty != null)
{
//to check the existence of ETag header
var etagInHeader = context.ResponseHttpHeaders.GetHeaderValue("ETag");
passed = etagInHeader != null;
if (!passed.Value)
{
info = new ExtensionRuleViolationInfo(this.ErrorMessage, context.Destination, string.Empty);
}
}
}
return(passed);
}
/// <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;
//to apply rule when payload has ETag header
var etagInHeader = context.ResponseHttpHeaders.GetHeaderValue("ETag");
if (etagInHeader != null)
{
var valueInHeader = GetETagValueCore(etagInHeader.Trim());
string entityName = ResourcePathHelper.GetEntityName(context);
string concurrencyProperty = ResourcePathHelper.GetConcurrencyProperty(XElement.Parse(context.MetadataDocument), entityName);
if (concurrencyProperty != null)
{
string valueInEntry = null;
//to get the concurrency token for the entity
switch (context.PayloadFormat)
{
case RuleEngine.PayloadFormat.Atom:
case RuleEngine.PayloadFormat.Xml:
valueInEntry = GetProperty(XElement.Parse(context.ResponsePayload), concurrencyProperty);
if (valueInEntry == null)
{
valueInEntry = GetRawValueOfProperty(context, concurrencyProperty, context);
}
break;
case RuleEngine.PayloadFormat.Json:
JObject jo = JObject.Parse(context.ResponsePayload);
valueInEntry = GetProperty(jo, concurrencyProperty);
if (valueInEntry == null)
{
valueInEntry = GetRawValueOfProperty(context, concurrencyProperty, context);
}
break;
case RuleEngine.PayloadFormat.Other:
{
var edmxHelper = new EdmxHelper(XElement.Parse(context.MetadataDocument));
var segments = ResourcePathHelper.GetPathSegments(context);
var segs = ResourcePathHelper.GetEntryUriSegments(segments.Take(segments.Count() - 1), edmxHelper);
Uri uriEntry = new Uri(context.ServiceBaseUri, string.Join("/", segs) + "/");
Uri uriConcurrencyValue = new Uri(uriEntry, concurrencyProperty + "/$value");
if (context.Destination == uriConcurrencyValue)
{
valueInEntry = context.ResponsePayload;
}
else
{
valueInEntry = GetProperty(uriEntry, concurrencyProperty, context);
}
}
break;
}
if (valueInEntry != null)
{
passed = valueInEntry == valueInHeader;
}
}
}
if (passed.HasValue && !passed.Value)
{
info = new ExtensionRuleViolationInfo(this.ErrorMessage, context.Destination, etagInHeader);
}
return(passed);
}
