Cusom Connectors: Policy templates: expressions not working

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Posted on by Frank37

Hi,

In my Custom Connector I need an expression in the policy

see: https://docs.microsoft.com/en-us/connectors/custom-connectors/policy-templates/expressions/expressions

example:

I have a query parameter named "content-format"

I defined a policy

- template: Set HTTP-Header

- operation: (my action selected)

- header name: content-type

- header value: @queryParameters(‘content-format’)

- action if header exists: overide

- run policy on: request

If I test my action, the answer from the azure platform is:

{
 "error": {
 "code": 500,
 "message": "Invalid parameters template. No property names specified in @headers or @queryParameters or @connectionParameters expression",
 "source": "europe-002.azure-apim.net",
 "path": "choose[4]\\when[1]",
 "clientRequestId": "cecfe20d-ddfa-4384-8624-f1aa-63c8c81f"
 }
}

Where ist my error?

Frank

Categories:

Microsoft Dataverse with Power Apps

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v-yutliu-msft on at

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Hi @Frank37 ,

Please check whether your api has access to the data source.

You could try to switch off authorization and do firewall rule and On-Premises gateway connection for security.

Here's a similar issue for your reference:

https://powerusers.microsoft.com/t5/Common-Data-Service-for-Apps/Can-t-do-custom-connector-from-url/td-p/170750

What's more, here's a doc about how to use this template that may help you for your reference:

https://docs.microsoft.com/en-us/connectors/custom-connectors/policy-templates

Best regards,

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Frank37 61 on at

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Hi Yutliu, the API access to the data source is OK: If I do not use the policy, the action is sent successfully to the server. This error only occurs if I enable the policy for this action (but I need the policy to make the action work correct) Frank

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ThamiMtombeni 71 on at

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Hi @Frank37 ,

Did you find a solution for this issue?

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