Once in a while need to allow someone access to one file but no other files in the same directory. I often solve this problem by moving the one file to a sub directory and then adding the following to an htaccess file in that same sub directory.
allow from all satisfy any
This normally works well but is not a perfect solution since it is not always appropriate to move the file to a different directory. So, I took the time and figured out how to password protect everything but one file. Below is the basic password protection that I had in the htaccess file that blocked everything in the directory (and sub-directories).
AuthGroupFile /dev/null AuthName "A Blog" AuthType Basic AuthUserFile /path/to/.htpasswd require valid-user
Now in order to exclude a file I just had to add the following below the above six lines of code.
<Files "page.html"> Allow from all Satisfy any
Of course this can be taken one step further if you wanted to exclude multiple files from password protection.
<FilesMatch "(page1\.html)|(page2\.html)"> Allow from all Satisfy any </FilesMatch>
FilesMatch can take a regular expression so you don’t necessarily have to list out each file. The below code will also accomplish the same thing (as above).
<FilesMatch "page[1-2]\.html"> Allow from all Satisfy any </FilesMatch>