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Private Uploads

作者: Chris Dennis

説明

‘Private’ uploaded files (PDFs, images, etc.) will normally be only included in private posts and pages. But the files themselves can still be accessed by anyone if they know the corresponding URLs.

For example, a PDF file’s URL might be

http://example.com/wp-content/uploads/minutes-20160924.pdf

and anyone could download that file because WordPress does not get a chance to check their authorisation.

The solution that the Private Uploads plugin uses involves moving any private files to a separate folder, and then configuring the web server to ask WordPress to authenticate access to files in that folder.

So the file’s URL might now be

http://example.com/wp-content/uploads/private/minutes-20160924.pdf

and an HTTP server rewrite rule will convert this to

http://example.com/?pucd-folder=private&pucd-file=minutes-20160924.pdf

The Private Uploads plugin will intercept that URL and reject it with a 403 status code.

This plugin is more efficient than some similar ones because it only has to run when serving files in the private folder(s): the web server handles other uploaded files (ones not in the private folders) directly.

Requirements

  • Sufficient access to the web server to allow the required configuration.

Acknowledgements

Future Plans

  • Currently, access to private files just depends on the is_user_logged_in() function. This plugin could be developed to give more fine-grained control, such as having a folder for each user.

インストール

Install the plugin in the usual way and activate it.

Move your private uploads (PDFs, images, or whatever) into a separate sub-folder within the WordPress uploads folder (usually /wp-content/uploads). One way of creating such a folder and moving the private files is by means of the Media Organiser plugin.

Then configure your web server as follows:

Nginx

Include a line like this in the server section of the Nginx configuration:

rewrite ^/wp-content/uploads/(private)/(.*)$ /?pucd-folder=$1&pucd-file=$2 break;

The folder name ‘private’ can be anything you like — it just has to match the name of the folder where your private files are kept, and be enclosed in parentheses in the rewrite statement.

More than one private folder can be configured by adding more lines of the same form, for example:

rewrite ^/wp-content/uploads/(2017/secure)/(.*)$ /?pucd-folder=$1&pucd-file=$2 break;

Apache

Enchiridion has supplied the following configuration for Apache. Thank you.

Here’s an equivalent rule for Apache to add to your existing rules:

RewriteRule ^wp-content/uploads/(private)/(.*)$ /?pucd-folder=$1&pucd-file=$2 [L]

Or you can copy/paste this entire block into your .htaccess file. Add before the # BEGIN WordPress block:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
# Block unauthenticated user access to the /private/ uploads folder
RewriteRule ^wp-content/uploads/(private)/(.*)$ /?pucd-folder=$1&pucd-file=$2 [L]
</IfModule>

Other web servers

are left as an exercise for the reader.

評価

Perfect

2019年11月18日
Simple, works well, just perfect for me. Some tips: With the Plugin User Role Editor you can add a role like view_private_file and choose which user roles can access it. You can also redirect to a access denied page. Just modify in the Plugin file the function send_private_file like this: // Only return files to logged-in users if (!is_user_logged_in() || !current_user_can('view_private_file')) { header("Location: https://www.yoursite.com/access-denied"); die(); }

Works well

2019年2月26日
Developer was helpful in answering my questions. Bluehost users will want to follow the Apache instructions.

Just What I Was Looking For

2018年7月12日
This is just the plugin I needed! No fluff, just does one thing and does it well. While it does work out of the box, there's some hard-coded paths and other things in there that can't be changed, so I've based a customized version off this plugin. For anyone who wants to use this with Apache, here's an equivalent .htaccess rule: RewriteRule ^wp-content/uploads/(private)/(.*)$ /?pucd-folder=$1&pucd-file=$2 [L]
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変更履歴

0.1.1

Tested with WordPress 5. Documentation tidied up.

0.1.0

  • First public release.

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