A collection of improvements to XF's attachment system.

• SVG support
• nginx's X-Accel-Redirect
• New Permissions for forum/conversations (Respects global attachment size & count limits): -- Attachment Size (kb). -- Maximum Attachment Count.

As XenForo_FileOutput is not extensible, this addon reimplements:

• XenForo_ViewAdmin_Attachment_View
• XenForo_ViewPublic_Attachment_View

Adds support for SVG files as attachments to be displayable as normal images.

Enables the use of Nginx's X-Accel-Redirect header feature for attachment serving.

This permits XenForo to-do validation and authentication, and offload the actual file serving to Nginx. This feature is not particularly well documented, but some info found here; http://wiki.nginx.org/X-accel

This addon assumes the /internal_data folder exists within XenForo's webroot.

If not, you may need an nginx config construct similar to:

    location ^~ /internal_data {
        internal;
        add_header Etag $upstream_http_etag;
        add_header X-Frame-Options SAMEORIGIN;
        add_header X-Content-Type-Options nosniff;
        alias /path/to/internal_data;
    }

And then add in config.php

    $config['internalDataUrl'] = '/internal_data';

To ensure you match how XenForo serves files, add the following headers into your site config where appropriate:

    add_header Etag $upstream_http_etag;
    add_header X-Frame-Options SAMEORIGIN;
    add_header X-Content-Type-Options nosniff;

ie:

location ^~ /internal_data {
    internal;
    add_header Etag $upstream_http_etag;
    add_header X-Frame-Options SAMEORIGIN;
    add_header X-Content-Type-Options nosniff;
}