Unable to render aspx files when uploaded to SharePoint programmatically

Question

I am new to SharePoint. I have written a simple python script that basically connects to SharePoint and uploads files (aspx and other frontend files) from a folder on my local machine to a specific folder on SharePoint site.

To facilitate the script to communicate with the SharePoint, I have a created an App principal under SharePoint using the SharePoint App-Only model. I have done this by calling the appregnew.aspx, example: https://spo.test.com/sites/MYSITE/_layouts/15/appregnew.aspx

Then, I have provided the below permissions to the App principal through 'appinv.aspx', example - https://spo.test.com/sites/MYSITE/_layouts/15/appinv.aspx

<AppPermissionRequests AllowAppOnlyPolicy="true">
  <AppPermissionRequest Scope="http://sharepoint/content/sitecollection/web" Right="FullControl"/>
</AppPermissionRequests>

Next, I use the Client ID and Client Secret under the Python script to establish communication with SharePoint and to upload files to a specific folder (folder already exists and is not created by the program) on SharePoint, example path to which files are uploaded: https://spo.test.com/sites/MYSITE/Shared%20Documents/TeamDocs2

Note: This script uses Python library 'Office365-REST-Python-Client' to communicate with SharePoint

The script can successfully authenticate itself and also upload the files to the folder on SharePoint. But then when I manually go to the SharePoint folder and click on the aspx file, example : index.aspx; the file gets downloaded instead of getting rendered.

There is no issue with the file i.e. it is not corrupted because when I manually upload the same file onto the same folder, then there is no issue, the file gets rendered.

In regards to the permissions for the App principal, I've already given 'FullControl' at the scope 'sitecolletion/web' level. I also tried changing the scope from 'http://sharepoint/content/sitecollection/web' to 'http://sharepoint/content/sitecollection', this didn't work as well

Please can somebody help me with this. Thanks in advance

Answer 1

Hi @SAI ANIRUDH,

According to my research and testing, you can use the following PowerShell code to disable the parameter setting "DenyAddAndCustomizePages" to resolve issues where files are downloaded instead of rendered.

Set-SPOsite https://xxx.sharepoint.com/sites/xxx -DenyAddAndCustomizePages 0

Note: Please upload the .aspx file as Site Owner to the document library. It won't work if you just have "Member" permissions to the site.

Similar issue for reference: SharePoint Online new aspx files keep downloading instead of showing

Hope it can help you. Thanks for your understanding.

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