Questions about prohibiting direct access to files

As follows:
Background to generate Excel files, put in A/b/test.xls here, I do not want others to enter the Http://*.com/a/b/test.xls directly, I want to have permission to access, the right to automatically run, ask how to deal with it?

Reply to discussion (solution)

The simplest is to save to a directory other than the Web

Add a. htaccess file to the portal file sibling directory

Use Apache's permissions authentication. Add permissions to this directory.

Apache Conf Set directory Permissions

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