来自外部来源的IMacros DATASOURCE

I have a script that extracts the data from a (local) CSV file and use it to fill some forms.

The problem I face is that I want to generate this CSV file on my VPS (with PHP), so I replaced:

SET !DATASOURCE data.csv

with

SET !DATASOURCE http://www.example.com/data.csv

Unfortunately, it seems that iMacros doesn't support an online datasource. Is there a way I could easily bypass this restriction? Maybe by combining my macro with JavaScript?

I get the following error message:

NS_ERROR_FILE_UNRECOGNIZED_PATH: Component returned failure code: 0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsILocalFile.initWithPath], line: 5 (Error code: -1001)