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HTTP call to create content on existing WIKI page

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Posted on by JonDoesFlow

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Hey,

I am trying to create some content on an ADO wiki page via an HTTP connector:

The projectID and wiki name is coming from a previous GET HTTP call. That seems to be working.

Password is my PAT Token.

When this step runs I get this error:

Parameter 'versions & newName' cannot be null or empty.
Parameter name: versions & newName

I have tried so many different things, but all coming back no go, any ideas?

Thanks,

Jon

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Expiscornovus 33,844 Most Valuable Professional on at

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Hi @Jondoesflow,

As far as I am aware that PATCH request requires an additional key/value in the headers section. You can use the eTag of your first request for the value of that key.

https://learn.microsoft.com/en-us/rest/api/azure/devops/wiki/pages/update?view=azure-devops-rest-7.1&tabs=HTTP#request-headers

Below is an example how you can set that up.

1. A GET request which retrieves page with ID 1

2. The PATCH of that page, which uses the below expression for the If-Match key

outputs('HTTP_-_Get_Wiki_Page_by_Id')['headers']['eTag']

I have also written this up as a blog btw:

https://www.expiscornovus.com/2024/03/18/azure-devops-update-wiki-page-content/

Happy to help out 😁

I share more #PowerAutomate and #SharePointOnline content on my Blog, Bluesky profile or Youtube Channel

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JonDoesFlow 1,304 on at

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Thanks @Expiscornovus I actually got to the same conclusion as you in the end, but this is exactly what I did, so marking it as accepted solution.

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