For data migration purposes I tried to copy files from one document library to another with the help of Power Automate's copy file action for SharePoint. At some point I realized that it always fails on file names that contain a plus (+) sign.
Checking the community pages I found this article that pointed me to the right direction to find a workaround:
https://powerusers.microsoft.com/t5/Building-Flows/Copying-sharepoint-files-with-a-symbol-in-them/m-p/675902#M91042
Although the "Copy file" action is already the second generation it seems like Microsoft has not managed to finally solve this bug as stated in article.
The community user BISK came up with a solution to replace the file path with some HTML or URI encoding. Basically, the solution its a double URI encoded string of the path we need.
We can solve this with using the encodeUriComponent() function in an expression twice.
Sample:
encodeUriComponent(encodeUriComponent('/Source/MyFolder/MyFiles with a + sign.pdf'))
And the result would look like this:
%252FSource%252FMyFolder%252FMyFiles%2520with%2520a%2520%252B%2520sign.pdf
You can also verify the encoding yourself with using this page: https://www.urlencoder.org/
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