Get the path of a file with streamlit cloud

Hello, I create a project where the user upload a file and use the path to this file to run what next.
In local, it works perfectly.
But in the cloud, I need to know if it’s possible to find the path of a file ? Because with st.upload it only take the name of the file, but I need the entire path.
My idea was to create an input for directory path, and then os.chdir in this path, so I can just use st.upload, but it doesn’t work because streamlit don’t recognize my directory path.
So is there any solution ? I have to make sure that my project can be done with streamlit cloud
Thanks