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Non-trivial web applications provide By default, RESTXQ code is executed with the {{Code|admin}} user. As a result, this user will be displayed in the ability logs for users to sign in and outall RESTXQ requests. User handling can be realized In a web application with session attributes (see e. g. a custom user management, however, the name of the [[DBA]] code)actual user who has sent a request is often more relevant.
By default, RESTXQ code When log data is run with admin permissions. However, as it is more interesting to know which user has called written during the processing of a RESTXQ function, the RESTXQ user string (which following is {{Code|admin}} by default, and which will show looked up in the log data) will be overwritten by the value of an {{Code|id}} session attribute. If the request path includes {{Code|/dba/}}, the {{Code|dba}} session attribute will be assigned.as follows:
If # The current request is checked for an {{Code|id}} attribute. The attribute can be assigned via RESTXQ and the following {{Function|Request|request:set-attribute}} function , and it is the recommended approach for stateless requests as all request attributes will be dropped after the finalization of a request.# If none is called more than oncefound, the {{Code|joeid}} will appear as user attribute is looked up in the second and subsequent log entries: <pre class="brush:xquery">import module namespace Session = 'http://basexcurrent user session.org/modules/session';declare %rest:path('/session-id') function local:f() The attribute can be assigned via {{ Function|Session|session:set}} ('id', 'joe'see e. g. the [[DBA]] code for sessions and user handling). If the request path contains a {{Code|dba}} segment, 'I am Joe'a {{Code|dba}};session attribute will be looked up instead.</pre># If none is found, the default path will be taken, and the user of the current database context will be included in the logs.
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The server logs are written in plain text. In your [[Configuration#Database Directory|Database Directory]], you can find a folder named <code>.logs</code> in which all log files are stored with the according date. Note that, depending on your OS and configuration, files and folders beinning with a <code>.</code> may be hidden. The log directory can be changed via the {{Option|LOGPATH}} option.
If BaseX is used in a [[Web Application]], all trace output (generated via {{Code|fn:trace}}, {{Function|Profiling|prof:dump}} and similar functions) will be stored in the logs as well.
Some more notes on the logging facility:
* HTTP requests are included in the log files.
* Logging can be turned on/off via the [[Options#LOG{{Option|LOG]] }} option.* The maximum length of logging messages can be changed via [[Options#LOGMSGMAXLEN{{Option|LOGMSGMAXLEN]]}}.
* The [[Admin Module]] provides access to the log files from XQuery.
==RESTXQ==
==Format==
; Example 1:
<presyntaxhighlight>
01:18:12.892 SERVER admin OK Server was started (port: 1984)
01:18:15.436 127.0.0.1:4722 jack REQUEST XQUERY for $i in 1 to 5 return random:double()
01:18:15.447 127.0.0.1:4722 jack REQUEST EXIT
01:18:15.447 127.0.0.1:4722 jack OK 0.39 ms
</presyntaxhighlight>
A server has been started and a user <code>jack</code> has connected to the server to perform a query and exit properly.
; Example 2:
<presyntaxhighlight>
01:23:33.251 127.0.0.1:4736 john OK QUERY[0] 'hi' 0.44 ms
01:23:33.337 127.0.0.1:4736 john OK ITER[0] 1.14 ms
01:23:33.359 127.0.0.1:4736 john REQUEST EXIT
01:23:33.359 127.0.0.1:4736 john OK 0.14 ms
</presyntaxhighlight>
A user <code>john</code> has performed an iterative query, using one of the client APIs.
; Example 3:
<presyntaxhighlight>
01:31:51.888 127.0.0.1:4803 admin REQUEST [GET] http://localhost:8984/rest/factbook
01:31:51.892 127.0.0.1:4803 admin 200 4.43 ms
</presyntaxhighlight>
An admin user has accessed the <code>factbook</code> database via REST.
=Changelog=
;Version 9.3
* Updated: Store trace output in database logs
* Updated: [[#RESTXQ|RESTXQ]]: The request attributes will be checked for a user id.
;Version 8.6
* Added: The log directory can be changed with the {{Option|LOGPATH}} option.
* Updated: Include session attributes in log data.
