Tag Archives: power app portal

Power Pages Update SSL Cert and Website Bindings and Website Authentication Key

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If you are here, you’re likely dealing with a Power Pages cert that’s about to expire or already has. Updating the cert is fairly straightforward, but the kicker is ensuring the user making the update has the correct permissions. When updating the cert, also check that the Website authentication key is still valid. Scroll to the bottom to see more about the auth key.

Permissions that are needed to update the cert and get the authentication key updated:
Owner on the App Registration associated with the Portal.
o365: Power Platform Admin, and Global Admin
As noted in the warning below, it states you can be a Global Admin or App Registration owner. Unless your sys admin is doing the update or if you are a sys admin, gaining access to the App Registration might be the easiest way to update the cert and re-bind the site.

Here are the steps I took to update my portals’ cert:
Uploaded the new cert under Manage custom certificates (note cert ID)
Navigate to the Set up custom domains and SSL page
Delete expired cert
In the SSL Bindings section, click +Add new and associate your host with the newly uploaded cert.

Here you can grab the Application ID and locate the associated App Registration.

Open the Azure portal, search for App Registrations, then search by the App ID. Once you have the App Reg., make sure you are an Owner. In the left nav of the app, click Owners, then add yourself or have an admin add you.

After that is updated, navigate back to the Power Pages admin portal and update the Authentication key. NOTE: the site will be offline for a few minutes.

Here are some helpful links related to this topic:
https://learn.microsoft.com/en-us/power-pages/admin/admin-roles
https://learn.microsoft.com/en-us/power-pages/admin/manage-auth-key


How Do You Get a Power Page Attachment That’s Stored in Blob Storage

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My Power App Portal (Power Pages) environments are configured to use Azure blob storage for form attachments. One of the primary reasons for doing this is to avoid filling up expensive dataverse storage with endless attachments submitted by enduers.

This article outlines how to set up Azure storage: link

What I’m going to demo is how to get ONE attachment that’s uploaded to a form. If your form allows multiple attachments, you’d simply loop through them.

In the example, I’m using the soon-to-be-obsolete dataverse connector, but the same basic flow design applies to the normal connector.

When a row is added to my table, the flow is triggered.
The flow then queries the Note (annotation) table using the ID from the source table.
filter query: (_objetid_value eq souce_table_id)

The list rows notes query will result in an array being returned, but I’m only dealing with one attachment, so there’s no need to loop through it. To avoid an unnecessary loop, a function can be used to target a single object from the array: first(body(‘List_rows_Notes’)?[‘value’])?[‘annotationid’]

From the Get row note action, annotationid and filename will be needed to help form the path to the blob. Using the concat function I’m combing the container name, annotationid, and filename. Also, note the transformation on annotationid, the hyphens need to be removed, and the string needs to be lowercase. The last part of the transformation is to remove .azure.txt from the filename. 

concat('/blobcontainer/',toLower(replace(outputs('Get_row_Note')?['body/annotationid'], '-', '')),'/', split(outputs('Get_row_Note')?['body/filename'], '.azure.txt')[0])

The end result of the transformation will be:
/blobcontainer/annotationid/filename /blobcontainer/cf03e4cf7f72ad118561002248881923/example.pdf

With the path to the blob formed, the get blob content action can retrieve the file.

It’s that simple.

A couple of notes:
It would be wise to leverage a virus-scanning tool like Cloudmersive.
If you haven’t already noticed, when a user uploads a file that contains special characters in the name…it’s saved to the Note table without the special characters, but when it’s moved to blob storage, the characters will be in the name. Yes, that’s a bug Microsoft has yet to fix. You can avoid this by adding Javascript to the upload page to block files that fall into this category. OR. Write another flow to clean file names before the form is processed.
Example:
Uploaded filename: my report 1:2:3.pdf
Note table: my report 123.pdf
Blob: my report 1:2:3.pdf

Purge Cache in Power App Portals

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This post will be updated to link to a future post that outlines all the different Power App Portals areas. If you have spent more than a few minutes in Portals, you will quickly notice that there is no single place to update or change settings.

How do you purge the cache for a portal?
Navigate to the Power Platform admin center
https://admin.powerplatform.microsoft.com/
Click on Environments and select your environment
Select the portal, then click Purge Cache in the ribbon

edit
The purge cache button won’t always pop up the modal asking if you want to purge the cache. If you visit this page, select your portal site, click the Purge Cache button, and the modal will appear.

https://admin.powerplatform.microsoft.com/resources/portals