private static IEnumerable <KeyValuePair <string, object> > ParseETagValue(IList <ResourceProperty> etagProperties, string ifMatchHeaderValue)
{
bool flag;
if (ifMatchHeaderValue == "*")
{
return(WebUtil.EmptyKeyValuePairStringObject);
}
string stringToUnescape = ifMatchHeaderValue.Substring("W/\"".Length, (ifMatchHeaderValue.Length - "W/\"".Length) - 1);
KeyInstance instance = null;
Exception innerException = null;
try
{
flag = KeyInstance.TryParseNullableTokens(Uri.UnescapeDataString(stringToUnescape), out instance);
}
catch (DataServiceException exception2)
{
flag = false;
innerException = exception2;
}
if (!flag)
{
throw DataServiceException.CreatePreConditionFailedError(System.Data.Services.Strings.Serializer_ETagValueDoesNotMatch, innerException);
}
if (instance.PositionalValues.Count != etagProperties.Count)
{
throw DataServiceException.CreatePreConditionFailedError(System.Data.Services.Strings.Serializer_ETagValueDoesNotMatch);
}
KeyValuePair <string, object>[] pairArray = new KeyValuePair <string, object> [etagProperties.Count];
for (int i = 0; i < pairArray.Length; i++)
{
ResourceProperty property = etagProperties[i];
object targetValue = null;
string text = (string)instance.PositionalValues[i];
if (text != "null")
{
try
{
flag = WebConvert.TryKeyStringToPrimitive(text, property.Type, out targetValue);
}
catch (OverflowException exception3)
{
flag = false;
innerException = exception3;
}
if (!flag)
{
throw DataServiceException.CreatePreConditionFailedError(System.Data.Services.Strings.Serializer_ETagValueDoesNotMatch, innerException);
}
}
pairArray[i] = new KeyValuePair <string, object>(etagProperties[i].Name, targetValue);
}
return(pairArray);
}
private void ApplyStandardPaging(string skipToken)
{
if (!string.IsNullOrEmpty(skipToken))
{
KeyInstance instance;
if (!this.IsPageSizeDefined)
{
throw DataServiceException.CreateBadRequestError(System.Data.Services.Strings.RequestQueryProcessor_SkipTokenSupportedOnPagedSets);
}
WebUtil.CheckSyntaxValid(KeyInstance.TryParseNullableTokens(skipToken, out instance));
if (this.topLevelOrderingInfo.OrderingExpressions.Count != instance.PositionalValues.Count)
{
throw DataServiceException.CreateBadRequestError(System.Data.Services.Strings.DataService_SDP_SkipTokenNotMatchingOrdering(instance.PositionalValues.Count, skipToken, this.topLevelOrderingInfo.OrderingExpressions.Count));
}
this.queryExpression = this.queryExpression.QueryableWhere(this.orderingParser.BuildSkipTokenFilter(this.topLevelOrderingInfo, instance));
this.description.VerifyProtocolVersion(RequestDescription.Version2Dot0, this.service);
this.description.VerifyRequestVersion(RequestDescription.Version2Dot0, this.service);
this.description.VerifyAndRaiseResponseVersion(RequestDescription.Version2Dot0, this.service);
}
}
private void ApplyCustomPaging(string skipToken)
{
if (!string.IsNullOrEmpty(skipToken))
{
KeyInstance instance;
WebUtil.CheckSyntaxValid(KeyInstance.TryParseNullableTokens(skipToken, out instance));
ParameterExpression parameterForIt = Expression.Parameter(this.description.LastSegmentInfo.TargetResourceType.InstanceType, "it");
RequestQueryParser.ExpressionParser parser = new RequestQueryParser.ExpressionParser(this.service, this.description, parameterForIt, string.Empty);
object[] skipTokenValues = new object[instance.PositionalValues.Count];
int num = 0;
foreach (object obj2 in instance.PositionalValues)
{
skipTokenValues[num++] = parser.ParseSkipTokenLiteral((string)obj2);
}
this.CheckAndApplyCustomPaging(skipTokenValues);
this.description.VerifyProtocolVersion(RequestDescription.Version2Dot0, this.service);
this.description.VerifyRequestVersion(RequestDescription.Version2Dot0, this.service);
}
else
{
this.CheckAndApplyCustomPaging(null);
}
}
/// <summary>
/// Parse the given etag value in the If-Match request header.
/// </summary>
/// <param name="etagProperties">List of etag properties for the type whose etag values we are parsing.</param>
/// <param name="ifMatchHeaderValue">value of the If-Match header as specified in the request.</param>
/// <returns>returns the etag value as a list containing the property name and its corresponding value. If the If-Match header value is '*', then returns an empty collection.</returns>
private static IEnumerable <KeyValuePair <string, object> > ParseETagValue(IList <ResourceProperty> etagProperties, string ifMatchHeaderValue)
{
Debug.Assert(etagProperties != null && etagProperties.Count != 0, "There must be atleast one etag property specified");
Debug.Assert(!String.IsNullOrEmpty(ifMatchHeaderValue), "IfMatch header cannot be null");
if (ifMatchHeaderValue == XmlConstants.HttpAnyETag)
{
// if the value is '*', then we return an empty IEnumerable.
return(new KeyValuePair <string, object> [0]);
}
Debug.Assert(ifMatchHeaderValue.StartsWith(XmlConstants.HttpWeakETagPrefix, StringComparison.Ordinal), "If-Match header must be properly formatted - this check is done in DataService.CheckETagValues method");
Debug.Assert(ifMatchHeaderValue.Length >= XmlConstants.HttpWeakETagPrefix.Length + 1, "If-Match header must be properly formatted - this check is done in DataService.CheckETagValues method");
// Just get the etag value - we need to ignore the 'W/"' and the last '"' character from the etag
string strippedETag = ifMatchHeaderValue.Substring(XmlConstants.HttpWeakETagPrefix.Length, ifMatchHeaderValue.Length - XmlConstants.HttpWeakETagPrefix.Length - 1);
KeyInstance keyInstance = null;
bool success;
Exception innerException = null;
// In V1, when we didn't have IConcurrencyProvider interface, we always used to compute the
// latest etag from the entity instance we got from IUpdatable.GetResource and then comparing
// it with the If-Match request header. Hence all invalid cases always used to throw
// DataServiceException with 412, since the etags didn't match.
// In V1.5, we have added the support for IConcurrencyProvider, which means we need to parse
// the etag values and parse it to the provider, if it has implement this interface. To avoid
// breaking changes, we need to catch all parsing errors and report them as 412 instead of 400
// to avoid it from becoming a breaking change.
try
{
success = KeyInstance.TryParseNullableTokens(Uri.UnescapeDataString(strippedETag), out keyInstance);
}
catch (DataServiceException e)
{
success = false;
innerException = e;
}
if (!success)
{
// We could have throwed BadRequest here since the etag value is not properly formattted. But since
// we used to do throw 412 in V1, keeping it that way to avoid breaking change.
throw DataServiceException.CreatePreConditionFailedError(Strings.Serializer_ETagValueDoesNotMatch, innerException);
}
if (keyInstance.PositionalValues.Count != etagProperties.Count)
{
// We could have throwed BadRequest here since the etag value is not properly formattted. But since
// we used to do throw 412 in V1, keeping it that way to avoid breaking change.
throw DataServiceException.CreatePreConditionFailedError(Strings.Serializer_ETagValueDoesNotMatch);
}
KeyValuePair <string, object>[] etagPropertyInfo = new KeyValuePair <string, object> [etagProperties.Count];
for (int i = 0; i < etagPropertyInfo.Length; i++)
{
ResourceProperty etagProperty = etagProperties[i];
object propertyValue = null;
string value = (string)keyInstance.PositionalValues[i];
if (value != XmlConstants.NullLiteralInETag)
{
// The reason we need to catch the Overflow Exception here is because of the Bug #679728.
// In V1, when we didn't have IConcurrencyProvider interface, we always used to compute the
// latest etag from the entity instance we got from IUpdatable.GetResource and then comparing
// it with the If-Match request header. Hence all invalid cases always used to throw
// DataServiceException with 412, since the etags didn't match.
// In V1.5, we have added the support for IConcurrencyProvider, which means we need to parse
// the etag values and parse it to the provider, if it has implement this interface. To avoid
// breaking changes, we need to catch all parsing errors and report them as 412 instead of 400
// to avoid it from becoming a breaking change.
try
{
success = System.Data.Services.Parsing.WebConvert.TryKeyStringToPrimitive(value, etagProperty.Type, out propertyValue);
}
catch (OverflowException e)
{
success = false;
innerException = e;
}
if (!success)
{
// We could have throwed BadRequest here since the etag value is not properly formattted. But since
// we used to do throw 412 in V1, keeping it that way to avoid breaking change.
throw DataServiceException.CreatePreConditionFailedError(Strings.Serializer_ETagValueDoesNotMatch, innerException);
}
}
etagPropertyInfo[i] = new KeyValuePair <string, object>(etagProperties[i].Name, propertyValue);
}
return(etagPropertyInfo);
}
