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This is AWS WAF Classic documentation. For more information, see AWS
WAF Classic in the developer guide.
For the latest version of AWS WAF, use the AWS WAFV2 API and see the AWS
WAF Developer Guide. With the latest version, AWS WAF has a single set of endpoints
for regional and global use.
When you want to create, update, or delete AWS WAF objects, get a change token and include the change token in the create, update, or delete request. Change tokens ensure that your application doesn't submit conflicting requests to AWS WAF.
Each create, update, or delete request must use a unique change token. If your application
submits a GetChangeToken request and then submits a second GetChangeToken
request before submitting a create, update, or delete request, the second GetChangeToken
request returns the same value as the first GetChangeToken request.
When you use a change token in a create, update, or delete request, the status of
the change token changes to PENDING, which indicates that AWS WAF is propagating
the change to all AWS WAF servers. Use GetChangeTokenStatus to determine the
status of your change token.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginGetChangeToken and EndGetChangeToken.
Namespace: Amazon.WAF
Assembly: AWSSDK.WAF.dll
Version: 3.x.y.z
public virtual Task<GetChangeTokenResponse> GetChangeTokenAsync( CancellationToken cancellationToken )
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
| Exception | Condition |
|---|---|
| WAFInternalErrorException | The operation failed because of a system problem, even though the request was valid. Retry your request. |
.NET Core App:
Supported in: 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5