Follow the instructions below to attach one or more default policies that are shipped with WSO2 API Manager to an API operation(s) of an existing API.
Sign in to the WSO2 API Publisher.
Click on the API for which you want to attach policies to (e.g.,
PizzaShackAPI 1.0.0). Navigate to API Configurations → Policies.
API Gatewaysection, make sure to select the correct Gateway. API Manager supports the following two Gateway types:
Regular Gateway (Synapse Gateway)and
Choreo Connect. Select the Gateway depending on the Gateway that your API is deployed in.
Keep in mind that the policies attached under a given
API Gatewaywill be removed when you switch between Gateways. However, this policy removal will be reflected in your API only if you click on the Save button found at the bottom of the Policies page.
The policy list is dependant on the selected Gateway (i.e. policy list under
Regular Gatewayis different to that of
Listed below are the key differences between the two types.
Gateway Difference Regular Gateway Operation level granularity Supported flows under each operation:
Choreo Connect Resource level granularity Supported flows under each resource:
Pick out the desired operation and flow to which you want to attach policies. Once that is decided, you can expand that API operation. At this point you will notice that by default the UI will open up the first API operation on initial page visit (for PizzaShack API,
/order POSTis expanded by default).
Let’s attach a policy to the
/menu GEToperation. Scroll down through the left side column of the UI and click on
/menu GETAPI operation. You should be able to see the below screen when the API operation is expanded.
Drag the Add Header policy from the Request tab of the Policy List and drop that to the Request Flow dropzone of
/menu GEToperation. You will notice a side panel appearing from the right hand side. Fill the required details using the values provided below. Then, click Save.
Field Sample Value Header Name Foo Header Value Bar
You can optionally use the Apply to all resources option to attach the same policy to all the resources when you save your settings. This will attach the same policy to all the API operations along with the values you entered to configure the policy (if any). It is important to note that if the policy was applied to the
Request Flow, it will only be applied to all the
Request Flowsof all operations.
Now that we have saved the dropped policy, you should be able to see the attached Add Header policy (depicted with the initials
If you click on this newly attached AH (i.e. Add Header) policy, you should still be able to view/edit values that you entered initially.
Let’s go ahead and attach a few more policies to the same Request Flow. Pick any amount of policies from the Request tab of the Policy List.
You can rearrange the dropped policies that are attached to the Request Flow of
You can download the policy source as a
.zipfile by clicking the cloud download icon
If you click on the delete icon, the dropped policy is cancelled
Finally, when you are satisfied with the dragged and dropped policies, you can go ahead and click on the Save button at the bottom of the page. Note that if you do not click on save, none of the dropped policies will be saved to the API.