zoneminder/docs/api.rst

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API
^^^
This document will provide an overview of ZoneMinder's API. This is work in progress.
Overview
^^^^^^^^
In an effort to further 'open up' ZoneMinder, an API was needed. This will
allow quick integration with and development of ZoneMinder.
The API is built in CakePHP and lives under the ``/api`` directory. It
provides a RESTful service and supports CRUD (create, retrieve, update, delete)
functions for Monitors, Events, Frames, Zones and Config.
Examples
^^^^^^^^
Here be a list of examples. Some results may be truncated.
You will see each URL ending in either ``.xml`` or ``.json``. This is the
format of the request, and it determines the format that any data returned to
you will be in. I like json, however you can use xml if you'd like.
(In all examples, replace 'server' with IP or hostname & port where ZoneMinder is running)
API Version
^^^^^^^^^^^
To retrieve the API version:
::
http://server/zm/api/host/getVersion.json
Return a list of all monitors
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
::
curl -XGET http://server/zm/api/monitors.json
Retrieve monitor 1
^^^^^^^^^^^^^^^^^^^
::
curl -XGET http://server/zm/api/monitors/1.json
Change State of Monitor 1
^^^^^^^^^^^^^^^^^^^^^^^^^^
This API changes monitor 1 to Modect and Enabled
::
curl -XPOST http://server/zm/api/monitors/1.json -d "Monitor[Function]=Modect&Monitor[Enabled]:true"
Add a monitor
^^^^^^^^^^^^^^
This command will add a new http monitor.
::
curl -XPOST http://server/zm/api/monitors.json -d "Monitor[Name]=Cliff-Burton \
&Monitor[Function]=Modect \
&Monitor[Protocol]=http \
&Monitor[Method]=simple \
&Monitor[Host]=usr:pass@192.168.11.20 \
&Monitor[Port]=80 \
&Monitor[Path]=/mjpg/video.mjpg \
&Monitor[Width]=704 \
&Monitor[Height]=480 \
&Monitor[Colours]=4"
Edit monitor 1
^^^^^^^^^^^^^^^
This command will change the 'Name' field of Monitor 1 to 'test1'
::
curl -XPUT http://server/zm/api/monitors/1.json -d "Monitor[Name]=test1"
Delete monitor 1
^^^^^^^^^^^^^^^^^
This command will delete Monitor 1, but will _not_ delete any Events which
depend on it.
::
curl -XDELETE http://server/zm/api/monitors/1.json
Return a list of all events
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
::
curl -XGET http://server/zm/api/events.json
Note that events list can be quite large and this API (as with all other APIs in ZM)
uses pagination. Each page returns a specific set of entries. By default this is 25
and ties into WEB_EVENTS_PER_PAGE in the ZM options menu.
So the logic to iterate through all events should be something like this (pseudocode):
(unfortunately there is no way to get pageCount without getting the first page)
::
data = http://server/zm/api/events.json?page=1 # this returns the first page
# The json object returned now has a property called data.pagination.pageCount
count = data.pagination.pageCount;
for (i=1, i<count, i++)
{
data = http://server/zm/api/events.json?page=i;
doStuff(data);
}
Retrieve event Id 1000
^^^^^^^^^^^^^^^^^^^^^^
::
curl -XGET http://server/zm/api/events/1000.json
Edit event 1
^^^^^^^^^^^^^
This command will change the 'Name' field of Event 1 to 'Seek and Destroy'
::
curl -XPUT http://server/zm/api/events/1.json -d "Event[Name]=Seek and Destroy"
Delete event 1
^^^^^^^^^^^^^^
This command will delete Event 1, and any Frames which depend on it.
::
curl -XDELETE http://server/zm/api/events/1.json
Return a list of events for a specific monitor Id =5
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
::
curl -XGET http://server/zm/api/events/events/index/MonitorId:5.json``
Note that the same pagination logic applies if the list is too long
Return a list of events for a specific monitor within a specific date/time range
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
::
http://server/zm/api/events/events/index/MonitorId:5/StartTime >=:2015-05-15 18:43:56/EndTime <=:2015-05-16 18:43:56.json
To try this in CuRL, you need to URL escape the spaces like so:
::
curl -XGET "http://server/zm/api/events/index/MonitorId:5/StartTime%20>=:2015-05-15%2018:43:56/EndTime%20<=:2015-05-16%2018:43:56.json"
Return a list of events for all monitors within a specified date/time range
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
::
curl -XGET "http://server/zm/api/events/index/StartTime%20>=:2015-05-15%2018:43:56/EndTime%20<=:208:43:56.json"
Configuration Apis
^^^^^^^^^^^^^^^^^^^
The APIs allow you to access all the configuration parameters of ZM that you typically set inside the web console.
This returns the full list of configuration parameters:
::
curl -XGET http://server/zm/api/configs.json
Each configuration parameter has an Id, Name, Value and other fields. Chances are you are likely only going to focus on these 3.
(Example of changing config TBD)
Run State Apis
^^^^^^^^^^^^^^^
ZM API can be used to start/stop/restart/list states of ZM as well
Examples:
::
curl -XGET http://server/zm/api/states.json # returns list of run states
curl -XPOST http://server/zm/api/states/change/restart.json #restarts ZM
curl -XPOST http://server/zm/api/states/change/stop.json #Stops ZM
curl -XPOST http://server/zm/api/states/change/start.json #Starts ZM
Create a Zone
^^^^^^^^^^^^^^
::
curl -XPOST http://server/zm/api/zones.json -d "Zone[Name]=Jason-Newsted \
&Zone[MonitorId]=3 \
&Zone[Type]=Active \
&Zone[Units]=Percent \
&Zone[NumCoords]=4 \
&Zone[Coords]=0,0 639,0 639,479 0,479 \
&Zone[AlarmRGB]=16711680 \
&Zone[CheckMethod]=Blobs \
&Zone[MinPixelThreshold]=25 \
&Zone[MaxPixelThreshold]= \
&Zone[MinAlarmPixels]=9216 \
&Zone[MaxAlarmPixels]= \
&Zone[FilterX]=3 \
&Zone[FilterY]=3 \
&Zone[MinFilterPixels]=9216 \
&Zone[MaxFilterPixels]=230400 \
&Zone[MinBlobPixels]=6144 \
&Zone[MaxBlobPixels]= \
&Zone[MinBlobs]=1 \
&Zone[MaxBlobs]= \
&Zone[OverloadFrames]=0"
PTZ Control APIs
^^^^^^^^^^^^^^^^
PTZ controls associated with a monitor are stored in the Controls table and not the Monitors table inside ZM. What that means is when you get the details of a Monitor, you will only know if it is controllable (isControllable:true) and the control ID.
To be able to retrieve PTZ information related to that Control ID, you need to use the controls API
This returns all the control definitions:
::
curl http://server/zm/api/controls.json
This returns control definitions for a specific control ID=5
::
curl http://server/zm/api/controls/5.json
Host APIs
^^^^^^^^^^
ZM APIs have various APIs that help you in determining host (aka ZM) daemon status, load etc. Some examples:
::
curl -XGET http://server/zm/api/host/daemonCheck.json # 1 = ZM running 0=not running
curl -XGET http://server/zm/api/host/getLoad.json # returns current load of ZM
curl -XGET http://server/zm/api/host/getDiskPercent.json # returns in GB (not percentage), disk usage per monitor (that is, space taken to store various event related information,images etc. per monitor) ``