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DOCS Clarify different file access types

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Ingo Schommer 2019-05-23 09:22:10 +12:00
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docs/en/02_Developer_Guides/14_Files/03_File_Security.md
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@ -32,19 +32,30 @@ Access restrictions:
Like all other objects in SilverStripe, permissions are generally controlled via `can*()` methods,
for example `canView()` (see [permissions](/developer_guides/security/permissions)).
The permission model defines the following actions:
* View: Access file metadata in the database
* Edit: Edit file metadata as well as replacing the file content
* Create: Create file metadata and upload file content
* Delete: Delete file metadata and the file content
* Download: Access the file content, but not the file metadata.
Usually treated the same as "View".
There's a few rules guiding their access, in descending order of priority:
* Published files can be viewed (downloaded) by anyone knowing the URL
* Access can determined by custom `can*()` method implementations on `File`
* Published and unprotected files can be downloaded by anyone knowing the URL.
They bypass any SilverStripe permission checks (served directly by the webserver).
* Access can be restricted by custom `can*()` method implementations on `File`
(through [extensions](/developer_guides/extending/extensions)).
This logic can overrule any further restrictions below.
* Users with "Full administrative rights" (`ADMIN` permission code)
have view and edit access by default, regardless of further restrictions below.
* Users with "Edit any file" permissions (`FILE_EDIT_ALL` permission code)
have edit access by default, regardless of further restrictions below.
* View or edit access can be restricted per file or folder through
an inherited permissions model similar to page content (through [api:SilverStripe\Security\InheritedPermissionsExtension]).
There are four types: "Inherit from parent" (default), "Anyone", "Logged-in users",
or "Only these groups".
There are four types: "Inherit from parent" (default), "Anyone", "Logged-in users", or "Only these groups".
* Protected files (incl. draft files) allow view/edit access when `File::$non_live_permissions` is satisfied.
By default, that's configured for anyone with access to any CMS section, or
the ability to "view draft content".
@ -65,7 +76,7 @@ further restrictions in your project.
When implenting your own `canView()` logic through [extensions](/developer_guides/extending/extensions),
existing unprotected files are not retroactively moved to the protected asset store.
While those new permissions are honoured in the CMS, protected files through custom `canView()`
can still be downloaded through a public URL until they a `write()` operation is triggered on them.
can still be downloaded through a public URL until a `write()` operation is triggered on them.
</div>
## Asset stores