To add support for breadcrumbs, you need to apply various settings in a new or existing property configuration.
You need to add the Breadcrumbs behavior to your Download Delivery property.
Create a new Download Delivery property, or edit an existing one using Property Manager.
In the Property Configuration Settings options, click Add Behavior.
In the Search available behaviorsfield, input Breadcrumbs to filter the listed behaviors, and select it from the list.
The new behavior is added to your configuration. Set the Enable Breadcrumbs switch to On.
Use the Opt Mode slider to conditionally Opt-IN or Opt-OUT of breadcrumbs support on a per request basis, using a specific query string.
Opt-OUT. By default, breadcrumbs data is includedin the response. Set this way, you can add the
ak-bc=offquery string to an individual request to block breadcrumbs data from a response.
Opt-IN. By default, breadcrumbs data is not includedin the response. You can optionally add the
ak-bc=onquery string to a request to include it in the response.
Review this table to understand how the query strings are applied, based on your Opt Mode setting.
|Query string parameter||Opt-Mode setting||Is Breadcrumbs data included in response?||Description|
|Opt-IN||Yes||By default, Opt-IN blocks breadcrumbs data from all responses. By including this query string, the response for this request will contain breadcrumbs data.|
|Opt-OUT||No||By default, Opt-OUT includes breadcrumbs data in all responses. By including this query string, breadcrumbs data will be left out of the response to this request.|
|None||Opt-IN||No||If no parameter is included, the "opt-IN" method responses *will not include* breadcrumbs data in all responses. (You need to include the query parameter in a request to "Opt-IN" and receive the data.)|
|Opt-OUT||Yes||If no parameter is included, the "Opt-OUT" method *includes*Breadcrumbs data in all responses. You need to include the query parameter in a request to "Opt-OUT" of receiving the data.|
You can simply have Breadcrumbs enabled in your property configuration and set Opt Mode to Opt-OUT to have breadcrumbs applied for all requests that match your rule criteria. Breadcrumbs include a specific header in the response to a requesting app. So, this increases the number of bytes delivered. Plus, your app just may not want (or support) the breadcrumbs response header. So, you can still have Breadcrumbs enabled and include opt-IN or opt-OUT to let the individual apps determine how to handle the responses on a per-request basis.
If so, ensure that the "Access-Control-Expose-Headers" contains the name of the Breadcrumbs response header.
Click the Default CORS Policy rule.
Locate the Modify Outgoing Response Header entry with its Select Header Name set to Access-Control-Expose-Headers.
Add Akamai-Request-BC to the list to include this header.
With Breadcrumbs, your app can send query parameters to control the opt-IN or opt-OUT aspects of receiving associated data in the response header. This parameter is not supported for use in the cache key. So, if you're including the Cache Key Query Parameters behavior, ensure that opt-IN and opt-OUT are left out.
Updated 8 months ago