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TiddlyWiki5/editions/tw5.com/tiddlers/webserver/WebServer Authorization.tid
2018-09-05 08:38:47 +01:00

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created: 20180630194006239
modified: 20180904174030250
tags: WebServer
title: WebServer Authorization
type: text/vnd.tiddlywiki
''Authorization'' is the process of determining which resources may be accessed by a particular user. It occurs after [[authentication|WebServer Authentication]] has determined the identity of the user. TiddlyWiki's WebServer implements a simple authorization scheme which permits independent control of who has read and write access to a wiki.
The WebServer parameters [[readers|WebServer Parameter: readers]] and [[writers|WebServer Parameter: writers]] each contain a comma separated list of //principals// (which is to say, either usernames or certain special tokens) which should have read or write access respectively.
The available special tokens are:
* ''(anon)'' - indicates all anonymous users
* ''(authenticated)'' - indicates all authenticated users
!! Read-only Mode
Read-only mode is engaged when the current user is not authorized to write to the current wiki.
User interface features concerned with creating or editing content are disabled in read-only mode:
* ''clone'', ''delete'', ''new-here'' and ''new-journal-here'' tiddler toolbar buttons
* ''import'', ''manager'', ''new-tiddler'' ''new-image'' and ''new-journal'' page control buttons
The tiddler $:/status/IsReadOnly is set to `yes` when read-only mode is engaged.
!! Examples
These example use the [[credentials|WebServer Parameter: credentials]] parameter to specify the location of a file containing usernames and passwords.
In the first example, read access is permitted for the users "joe" and "mary", with write access restricted to "mary":
```
tiddlywiki mywikifolder --listen credentials=myusers.csv readers=joe,mary writers=mary
```
In the following example, read access is granted to all authenticated users, but only "mary" is granted write access:
```
tiddlywiki mywikifolder --listen credentials=myusers.csv "readers=(authenticated)" writers=mary
```