private void ApplySessionToken(DocumentServiceRequest request)
{
if (request.Headers != null &&
!string.IsNullOrEmpty(request.Headers[HttpConstants.HttpHeaders.SessionToken]))
{
if (ReplicatedResourceClient.IsMasterResource(request.ResourceType))
{
request.Headers.Remove(HttpConstants.HttpHeaders.SessionToken);
}
return; //User is explicitly controlling the session.
}
string requestConsistencyLevel = request.Headers[HttpConstants.HttpHeaders.ConsistencyLevel];
bool sessionConsistency =
this.defaultConsistencyLevel == ConsistencyLevel.Session ||
(!string.IsNullOrEmpty(requestConsistencyLevel) &&
string.Equals(requestConsistencyLevel, ConsistencyLevel.Session.ToString(), StringComparison.OrdinalIgnoreCase));
if (!sessionConsistency || ReplicatedResourceClient.IsMasterResource(request.ResourceType))
{
return; // Only apply the session token in case of session consistency and when resource is not a master resource
}
//Apply the ambient session.
string sessionToken = this.sessionContainer.ResolveGlobalSessionToken(request);
if (!string.IsNullOrEmpty(sessionToken))
{
request.Headers[HttpConstants.HttpHeaders.SessionToken] = sessionToken;
}
}
public virtual async Task <DocumentServiceResponse> ProcessMessageAsync(DocumentServiceRequest request, CancellationToken cancellationToken = default(CancellationToken))
{
GatewayStoreModel.ApplySessionToken(
request,
this.defaultConsistencyLevel,
this.sessionContainer);
DocumentServiceResponse response;
try
{
Uri physicalAddress = GatewayStoreClient.IsFeedRequest(request.OperationType) ? this.GetFeedUri(request) : this.GetEntityUri(request);
response = await this.gatewayStoreClient.InvokeAsync(request, request.ResourceType, physicalAddress, cancellationToken);
}
catch (DocumentClientException exception)
{
if ((!ReplicatedResourceClient.IsMasterResource(request.ResourceType)) &&
(exception.StatusCode == HttpStatusCode.PreconditionFailed || exception.StatusCode == HttpStatusCode.Conflict ||
(exception.StatusCode == HttpStatusCode.NotFound && exception.GetSubStatus() != SubStatusCodes.ReadSessionNotAvailable)))
{
this.CaptureSessionToken(exception.StatusCode, exception.GetSubStatus(), request, exception.Headers);
}
throw;
}
this.CaptureSessionToken(response.StatusCode, response.SubStatusCode, request, response.Headers);
return(response);
}
public virtual async Task <DocumentServiceResponse> ProcessMessageAsync(DocumentServiceRequest request, CancellationToken cancellationToken = default(CancellationToken))
{
this.ApplySessionToken(request);
DocumentServiceResponse response;
try
{
response = await this.InvokeAsync(request, request.ResourceType, cancellationToken);
}
catch (DocumentClientException exception)
{
if ((!ReplicatedResourceClient.IsMasterResource(request.ResourceType)) &&
(exception.StatusCode == HttpStatusCode.PreconditionFailed || exception.StatusCode == HttpStatusCode.Conflict ||
(exception.StatusCode == HttpStatusCode.NotFound && exception.GetSubStatus() != SubStatusCodes.ReadSessionNotAvailable)))
{
this.CaptureSessionToken(request, exception.Headers);
}
throw;
}
this.CaptureSessionToken(request, response.Headers);
return(response);
}
private async Task CaptureSessionTokenAndHandleSplitAsync(
HttpStatusCode?statusCode,
SubStatusCodes subStatusCode,
DocumentServiceRequest request,
INameValueCollection responseHeaders)
{
// Exceptionless can try to capture session token from CompleteResponse
if (request.IsValidStatusCodeForExceptionlessRetry((int)statusCode, subStatusCode))
{
// Not capturing on master resources
if (ReplicatedResourceClient.IsMasterResource(request.ResourceType))
{
return;
}
// Only capturing on 409, 412, 404 && !1002
if (statusCode != HttpStatusCode.PreconditionFailed &&
statusCode != HttpStatusCode.Conflict &&
(statusCode != HttpStatusCode.NotFound || subStatusCode == SubStatusCodes.ReadSessionNotAvailable))
{
return;
}
}
if (request.ResourceType == ResourceType.Collection && request.OperationType == OperationType.Delete)
{
string resourceId;
if (request.IsNameBased)
{
resourceId = responseHeaders[HttpConstants.HttpHeaders.OwnerId];
}
else
{
resourceId = request.ResourceId;
}
this.sessionContainer.ClearTokenByResourceId(resourceId);
}
else
{
this.sessionContainer.SetSessionToken(request, responseHeaders);
PartitionKeyRange detectedPartitionKeyRange = request.RequestContext.ResolvedPartitionKeyRange;
string partitionKeyRangeInResponse = responseHeaders[HttpConstants.HttpHeaders.PartitionKeyRangeId];
if (detectedPartitionKeyRange != null &&
!string.IsNullOrEmpty(partitionKeyRangeInResponse) &&
!string.IsNullOrEmpty(request.RequestContext.ResolvedCollectionRid) &&
!partitionKeyRangeInResponse.Equals(detectedPartitionKeyRange.Id, StringComparison.OrdinalIgnoreCase))
{
// The request ended up being on a different partition unknown to the client, so we better refresh the caches
await this.partitionKeyRangeCache.TryGetPartitionKeyRangeByIdAsync(
request.RequestContext.ResolvedCollectionRid,
partitionKeyRangeInResponse,
NoOpTrace.Singleton,
forceRefresh : true);
}
}
}
// DEVNOTE: This can be replace with ReplicatedResourceClient.IsMasterOperation on next Direct sync
internal static bool IsMasterOperation(
ResourceType resourceType,
OperationType operationType)
{
// Stored procedures, trigger, and user defined functions CRUD operations are done on
// master so they do not require the session token. Stored procedures execute is not a master operation
return(ReplicatedResourceClient.IsMasterResource(resourceType) ||
GatewayStoreModel.IsStoredProcedureCrudOperation(resourceType, operationType) ||
resourceType == ResourceType.Trigger ||
resourceType == ResourceType.UserDefinedFunction ||
operationType == OperationType.QueryPlan);
}
private void CaptureSessionToken(
HttpStatusCode?statusCode,
SubStatusCodes subStatusCode,
DocumentServiceRequest request,
INameValueCollection responseHeaders)
{
// Exceptionless can try to capture session token from CompleteResponse
if (request.IsValidStatusCodeForExceptionlessRetry((int)statusCode, subStatusCode))
{
// Not capturing on master resources
if (ReplicatedResourceClient.IsMasterResource(request.ResourceType))
{
return;
}
// Only capturing on 409, 412, 404 && !1002
if (statusCode != HttpStatusCode.PreconditionFailed &&
statusCode != HttpStatusCode.Conflict &&
(statusCode != HttpStatusCode.NotFound || subStatusCode == SubStatusCodes.ReadSessionNotAvailable))
{
return;
}
}
if (request.ResourceType == ResourceType.Collection && request.OperationType == OperationType.Delete)
{
string resourceId;
if (request.IsNameBased)
{
resourceId = responseHeaders[HttpConstants.HttpHeaders.OwnerId];
}
else
{
resourceId = request.ResourceId;
}
this.sessionContainer.ClearTokenByResourceId(resourceId);
}
else
{
this.sessionContainer.SetSessionToken(request, responseHeaders);
}
}
private static bool ShouldUpdateSessionToken(
DocumentServiceRequest request,
INameValueCollection responseHeaders,
out ResourceId resourceId,
out string collectionName)
{
resourceId = null;
string ownerFullName = responseHeaders[HttpConstants.HttpHeaders.OwnerFullName];
if (string.IsNullOrEmpty(ownerFullName))
{
ownerFullName = request.ResourceAddress;
}
collectionName = PathsHelper.GetCollectionPath(ownerFullName);
string resourceIdString;
if (request.IsNameBased)
{
resourceIdString = responseHeaders[HttpConstants.HttpHeaders.OwnerId];
if (string.IsNullOrEmpty(resourceIdString))
{
resourceIdString = request.ResourceId;
}
}
else
{
resourceIdString = request.ResourceId;
}
if (!string.IsNullOrEmpty(resourceIdString))
{
resourceId = ResourceId.Parse(resourceIdString);
if (resourceId.DocumentCollection != 0 &&
collectionName != null &&
!ReplicatedResourceClient.IsReadingFromMaster(request.ResourceType, request.OperationType))
{
return(true);
}
}
return(false);
}
private void HandleUnsuccessfulStoreResponse(DocumentServiceRequest request, HttpStatusCode?statusCode, SubStatusCodes subStatusCode, INameValueCollection responseHeaders)
{
if (request.IsNameBased && statusCode == HttpStatusCode.NotFound &&
subStatusCode == SubStatusCodes.ReadSessionNotAvailable &&
request.ClearSessionTokenOnSessionReadFailure)
{
// Clear the session token, because the collection name might be reused.
DefaultTrace.TraceWarning("Clear the the token for named base request {0}", request.ResourceAddress);
this.sessionContainer.ClearToken(null, request.ResourceAddress, responseHeaders);
}
else
{
if ((!ReplicatedResourceClient.IsMasterResource(request.ResourceType)) &&
(statusCode == HttpStatusCode.PreconditionFailed || statusCode == HttpStatusCode.Conflict ||
(statusCode == HttpStatusCode.NotFound && subStatusCode != SubStatusCodes.ReadSessionNotAvailable)))
{
this.CaptureSessionToken(request, responseHeaders);
}
}
}
public virtual async Task <DocumentServiceResponse> ProcessMessageAsync(DocumentServiceRequest request, CancellationToken cancellationToken = default)
{
await GatewayStoreModel.ApplySessionTokenAsync(
request,
this.defaultConsistencyLevel,
this.sessionContainer,
this.partitionKeyRangeCache,
this.clientCollectionCache,
this.endpointManager);
DocumentServiceResponse response;
try
{
Uri physicalAddress = GatewayStoreClient.IsFeedRequest(request.OperationType) ? this.GetFeedUri(request) : this.GetEntityUri(request);
// Collect region name only for document resources
if (request.ResourceType.Equals(ResourceType.Document) && this.endpointManager.TryGetLocationForGatewayDiagnostics(request.RequestContext.LocationEndpointToRoute, out string regionName))
{
request.RequestContext.RegionName = regionName;
}
response = await this.gatewayStoreClient.InvokeAsync(request, request.ResourceType, physicalAddress, cancellationToken);
}
catch (DocumentClientException exception)
{
if ((!ReplicatedResourceClient.IsMasterResource(request.ResourceType)) &&
(exception.StatusCode == HttpStatusCode.PreconditionFailed || exception.StatusCode == HttpStatusCode.Conflict ||
(exception.StatusCode == HttpStatusCode.NotFound && exception.GetSubStatus() != SubStatusCodes.ReadSessionNotAvailable)))
{
await this.CaptureSessionTokenAndHandleSplitAsync(exception.StatusCode, exception.GetSubStatus(), request, exception.Headers);
}
throw;
}
await this.CaptureSessionTokenAndHandleSplitAsync(response.StatusCode, response.SubStatusCode, request, response.Headers);
return(response);
}
/// <summary>
/// Resolves the endpoint of the partition for the given request
/// </summary>
/// <param name="request">Request for which the partition endpoint resolution is to be performed</param>
/// <param name="forceRefreshPartitionAddresses">Force refresh the partition's endpoint</param>
/// <param name="cancellationToken">Cancellation token</param>
/// <returns>An instance of <see cref="ResolutionResult"/>.</returns>
private async Task <ResolutionResult> ResolveAddressesAndIdentityAsync(
DocumentServiceRequest request,
bool forceRefreshPartitionAddresses,
CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
if (request.ServiceIdentity != null)
{
// In this case we don't populate request.RequestContext.ResolvedPartitionKeyRangeId,
// which is needed for session token.
// The assumption is that:
// 1. Master requests never use session consistency.
// 2. Service requests (like collection create etc.) don't use session consistency.
// 3. Requests which target specific partition of an existing collection will use x-ms-documentdb-partitionkeyrangeid header
// to send request to specific partition and will not set request.ServiceIdentity
ServiceIdentity identity = request.ServiceIdentity;
PartitionAddressInformation addresses = await this.addressCache.TryGetAddressesAsync(request, null, identity, forceRefreshPartitionAddresses, cancellationToken);
if (addresses == null)
{
DefaultTrace.TraceInformation("Could not get addresses for explicitly specified ServiceIdentity {0}", identity);
throw new NotFoundException()
{
ResourceAddress = request.ResourceAddress
};
}
return(new ResolutionResult(addresses, identity));
}
if (ReplicatedResourceClient.IsReadingFromMaster(request.ResourceType, request.OperationType) && request.PartitionKeyRangeIdentity == null)
{
DefaultTrace.TraceInformation("Resolving Master service address, forceMasterRefresh: {0}, currentMaster: {1}",
request.ForceMasterRefresh,
this.masterServiceIdentityProvider?.MasterServiceIdentity);
// Client implementation, GlobalAddressResolver passes in a null IMasterServiceIdentityProvider, because it doesn't actually use the serviceIdentity
// in the addressCache.TryGetAddresses method. In GatewayAddressCache.cs, the master address is resolved by making a call to Gateway AddressFeed,
// not using the serviceIdentity that is passed in
if (request.ForceMasterRefresh && this.masterServiceIdentityProvider != null)
{
ServiceIdentity previousMasterService = this.masterServiceIdentityProvider.MasterServiceIdentity;
await this.masterServiceIdentityProvider.RefreshAsync(previousMasterService, cancellationToken);
}
ServiceIdentity serviceIdentity = this.masterServiceIdentityProvider?.MasterServiceIdentity;
PartitionKeyRangeIdentity partitionKeyRangeIdentity = this.masterPartitionKeyRangeIdentity;
PartitionAddressInformation addresses = await this.addressCache.TryGetAddressesAsync(
request,
partitionKeyRangeIdentity,
serviceIdentity,
forceRefreshPartitionAddresses,
cancellationToken);
if (addresses == null)
{
// This shouldn't really happen.
DefaultTrace.TraceCritical("Could not get addresses for master partition {0}", serviceIdentity);
throw new NotFoundException()
{
ResourceAddress = request.ResourceAddress
};
}
PartitionKeyRange partitionKeyRange = new PartitionKeyRange {
Id = PartitionKeyRange.MasterPartitionKeyRangeId
};
return(new ResolutionResult(partitionKeyRange, addresses, serviceIdentity));
}
bool collectionCacheIsUptoDate = !request.IsNameBased ||
(request.PartitionKeyRangeIdentity != null && request.PartitionKeyRangeIdentity.CollectionRid != null);
bool collectionRoutingMapCacheIsUptoDate = false;
ContainerProperties collection = await this.collectionCache.ResolveCollectionAsync(request, cancellationToken);
CollectionRoutingMap routingMap = await this.collectionRoutingMapCache.TryLookupAsync(
collection.ResourceId, null, request, cancellationToken);
if (routingMap != null && request.ForceCollectionRoutingMapRefresh)
{
DefaultTrace.TraceInformation(
"AddressResolver.ResolveAddressesAndIdentityAsync ForceCollectionRoutingMapRefresh collection.ResourceId = {0}",
collection.ResourceId);
routingMap = await this.collectionRoutingMapCache.TryLookupAsync(collection.ResourceId, routingMap, request, cancellationToken);
}
if (request.ForcePartitionKeyRangeRefresh)
{
collectionRoutingMapCacheIsUptoDate = true;
request.ForcePartitionKeyRangeRefresh = false;
if (routingMap != null)
{
routingMap = await this.collectionRoutingMapCache.TryLookupAsync(collection.ResourceId, routingMap, request, cancellationToken);
}
}
if (routingMap == null && !collectionCacheIsUptoDate)
{
// Routing map was not found by resolved collection rid. Maybe collection rid is outdated.
// Refresh collection cache and reresolve routing map.
request.ForceNameCacheRefresh = true;
collectionCacheIsUptoDate = true;
collectionRoutingMapCacheIsUptoDate = false;
collection = await this.collectionCache.ResolveCollectionAsync(request, cancellationToken);
routingMap = await this.collectionRoutingMapCache.TryLookupAsync(
collection.ResourceId,
previousValue : null,
request : request,
cancellationToken : cancellationToken);
}
AddressResolver.EnsureRoutingMapPresent(request, routingMap, collection);
// At this point we have both collection and routingMap.
ResolutionResult result = await this.TryResolveServerPartitionAsync(
request,
collection,
routingMap,
collectionCacheIsUptoDate,
collectionRoutingMapCacheIsUptodate : collectionRoutingMapCacheIsUptoDate,
forceRefreshPartitionAddresses : forceRefreshPartitionAddresses,
cancellationToken : cancellationToken);
if (result == null)
{
// Couldn't resolve server partition or its addresses.
// Either collection cache is outdated or routing map cache is outdated.
if (!collectionCacheIsUptoDate)
{
request.ForceNameCacheRefresh = true;
collectionCacheIsUptoDate = true;
collection = await this.collectionCache.ResolveCollectionAsync(request, cancellationToken);
if (collection.ResourceId != routingMap.CollectionUniqueId)
{
// Collection cache was stale. We resolved to new Rid. routing map cache is potentially stale
// for this new collection rid. Mark it as such.
collectionRoutingMapCacheIsUptoDate = false;
routingMap = await this.collectionRoutingMapCache.TryLookupAsync(
collection.ResourceId,
previousValue : null,
request : request,
cancellationToken : cancellationToken);
}
}
if (!collectionRoutingMapCacheIsUptoDate)
{
collectionRoutingMapCacheIsUptoDate = true;
routingMap = await this.collectionRoutingMapCache.TryLookupAsync(
collection.ResourceId,
previousValue : routingMap,
request : request,
cancellationToken : cancellationToken);
}
AddressResolver.EnsureRoutingMapPresent(request, routingMap, collection);
result = await this.TryResolveServerPartitionAsync(
request,
collection,
routingMap,
collectionCacheIsUptodate : true,
collectionRoutingMapCacheIsUptodate : true,
forceRefreshPartitionAddresses : forceRefreshPartitionAddresses,
cancellationToken : cancellationToken);
}
if (result == null)
{
DefaultTrace.TraceInformation("Couldn't route partitionkeyrange-oblivious request after retry/cache refresh. Collection doesn't exist.");
// At this point collection cache and routing map caches are refreshed.
// The only reason we will get here is if collection doesn't exist.
// Case when partitionkeyrange doesn't exist is handled in the corresponding method.
throw new NotFoundException()
{
ResourceAddress = request.ResourceAddress
};
}
if (request.IsNameBased)
{
// Append collection rid.
// If we resolved collection rid incorrectly because of outdated cache, this can lead
// to incorrect routing decisions. But backend will validate collection rid and throw
// InvalidPartitionException if we reach wrong collection.
// Also this header will be used by backend to inject collection rid into metrics for
// throttled requests.
request.Headers[WFConstants.BackendHeaders.CollectionRid] = collection.ResourceId;
}
return(result);
}
public async Task <INameValueCollection> CreateCommonHeadersAsync(FeedOptions feedOptions)
{
INameValueCollection requestHeaders = new DictionaryNameValueCollection();
Cosmos.ConsistencyLevel defaultConsistencyLevel = (Cosmos.ConsistencyLevel) await this.Client.GetDefaultConsistencyLevelAsync();
Cosmos.ConsistencyLevel?desiredConsistencyLevel = (Cosmos.ConsistencyLevel?) await this.Client.GetDesiredConsistencyLevelAsync();
if (!string.IsNullOrEmpty(feedOptions.SessionToken) && !ReplicatedResourceClient.IsReadingFromMaster(this.ResourceTypeEnum, OperationType.ReadFeed))
{
if (defaultConsistencyLevel == Cosmos.ConsistencyLevel.Session || (desiredConsistencyLevel.HasValue && desiredConsistencyLevel.Value == Cosmos.ConsistencyLevel.Session))
{
// Query across partitions is not supported today. Master resources (for e.g., database)
// can span across partitions, whereas server resources (viz: collection, document and attachment)
// don't span across partitions. Hence, session token returned by one partition should not be used
// when quering resources from another partition.
// Since master resources can span across partitions, don't send session token to the backend.
// As master resources are sync replicated, we should always get consistent query result for master resources,
// irrespective of the chosen replica.
// For server resources, which don't span partitions, specify the session token
// for correct replica to be chosen for servicing the query result.
requestHeaders[HttpConstants.HttpHeaders.SessionToken] = feedOptions.SessionToken;
}
}
requestHeaders[HttpConstants.HttpHeaders.Continuation] = feedOptions.RequestContinuationToken;
requestHeaders[HttpConstants.HttpHeaders.IsQuery] = bool.TrueString;
// Flow the pageSize only when we are not doing client eval
if (feedOptions.MaxItemCount.HasValue)
{
requestHeaders[HttpConstants.HttpHeaders.PageSize] = feedOptions.MaxItemCount.ToString();
}
requestHeaders[HttpConstants.HttpHeaders.EnableCrossPartitionQuery] = feedOptions.EnableCrossPartitionQuery.ToString();
if (feedOptions.MaxDegreeOfParallelism != 0)
{
requestHeaders[HttpConstants.HttpHeaders.ParallelizeCrossPartitionQuery] = bool.TrueString;
}
if (this.feedOptions.EnableScanInQuery != null)
{
requestHeaders[HttpConstants.HttpHeaders.EnableScanInQuery] = this.feedOptions.EnableScanInQuery.ToString();
}
if (this.feedOptions.EmitVerboseTracesInQuery != null)
{
requestHeaders[HttpConstants.HttpHeaders.EmitVerboseTracesInQuery] = this.feedOptions.EmitVerboseTracesInQuery.ToString();
}
if (this.feedOptions.EnableLowPrecisionOrderBy != null)
{
requestHeaders[HttpConstants.HttpHeaders.EnableLowPrecisionOrderBy] = this.feedOptions.EnableLowPrecisionOrderBy.ToString();
}
if (!string.IsNullOrEmpty(this.feedOptions.FilterBySchemaResourceId))
{
requestHeaders[HttpConstants.HttpHeaders.FilterBySchemaResourceId] = this.feedOptions.FilterBySchemaResourceId;
}
if (this.feedOptions.ResponseContinuationTokenLimitInKb != null)
{
requestHeaders[HttpConstants.HttpHeaders.ResponseContinuationTokenLimitInKB] = this.feedOptions.ResponseContinuationTokenLimitInKb.ToString();
}
if (this.feedOptions.ConsistencyLevel.HasValue)
{
await this.Client.EnsureValidOverwriteAsync((Documents.ConsistencyLevel) feedOptions.ConsistencyLevel.Value);
requestHeaders.Set(HttpConstants.HttpHeaders.ConsistencyLevel, this.feedOptions.ConsistencyLevel.Value.ToString());
}
else if (desiredConsistencyLevel.HasValue)
{
requestHeaders.Set(HttpConstants.HttpHeaders.ConsistencyLevel, desiredConsistencyLevel.Value.ToString());
}
if (this.feedOptions.EnumerationDirection.HasValue)
{
requestHeaders.Set(HttpConstants.HttpHeaders.EnumerationDirection, this.feedOptions.EnumerationDirection.Value.ToString());
}
if (this.feedOptions.ReadFeedKeyType.HasValue)
{
requestHeaders.Set(HttpConstants.HttpHeaders.ReadFeedKeyType, this.feedOptions.ReadFeedKeyType.Value.ToString());
}
if (this.feedOptions.StartId != null)
{
requestHeaders.Set(HttpConstants.HttpHeaders.StartId, this.feedOptions.StartId);
}
if (this.feedOptions.EndId != null)
{
requestHeaders.Set(HttpConstants.HttpHeaders.EndId, this.feedOptions.EndId);
}
if (this.feedOptions.StartEpk != null)
{
requestHeaders.Set(HttpConstants.HttpHeaders.StartEpk, this.feedOptions.StartEpk);
}
if (this.feedOptions.EndEpk != null)
{
requestHeaders.Set(HttpConstants.HttpHeaders.EndEpk, this.feedOptions.EndEpk);
}
if (this.feedOptions.PopulateQueryMetrics)
{
requestHeaders[HttpConstants.HttpHeaders.PopulateQueryMetrics] = bool.TrueString;
}
if (this.feedOptions.ForceQueryScan)
{
requestHeaders[HttpConstants.HttpHeaders.ForceQueryScan] = bool.TrueString;
}
if (this.feedOptions.MergeStaticId != null)
{
requestHeaders.Set(HttpConstants.HttpHeaders.MergeStaticId, this.feedOptions.MergeStaticId);
}
if (this.feedOptions.CosmosSerializationFormatOptions != null)
{
requestHeaders[HttpConstants.HttpHeaders.ContentSerializationFormat] = this.feedOptions.CosmosSerializationFormatOptions.ContentSerializationFormat;
}
else if (this.feedOptions.ContentSerializationFormat.HasValue)
{
requestHeaders[HttpConstants.HttpHeaders.ContentSerializationFormat] = this.feedOptions.ContentSerializationFormat.Value.ToString();
}
return(requestHeaders);
}