php - download service, controlling file access -

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i have wordpress site people buy access downloads through woocommerce plugin.

there several thousand downloads each order , have found woocommerce inefficient when handling large amounts of downloads.

the download files 

product1_date.pdf  product2_date.pdf  etc...

i can't change this

i need php solution which

  1. admin can upload files directory via ftp
  2. users buy product can download them in download area
  3. users cannot access files products haven't purchased guessing filename

1 , 2 can handle, how prevent 3? there way can set file permissions read specific user has purchased? or possible make directory writable (so can uploaded) files readable apache , serve files user other way?

first, must stop hotlinks! after, create downloader file contain of downloader function. this's parameters file mime-type, file name, file url etc... users can download downloader file. function first control users access, after accept user want or not accept. return


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