Adding ArcGIS Feature Service connections to QGIS 3 using Python API?

Question

I am trying to deploy multiple ArcGIS Feature Service connections to all of the QGIS 3 users in my workplace.

Is there a way to do it using the Python API?

At the moment I'm manually adding the connections into the QGIS3.ini, like this :

[qgis]
connections-arcgisfeatureserver\My%20Service%20Name\url=https://services.somewhere.com/arcgis/rest/services/My_Service_Name/MapServer
ARCGISFEATURESERVER\My%20Service%20Name\username=MyUsername
ARCGISFEATURESERVER\My%20Service%20Name\password=MyPassword
ARCGISFEATURESERVER\My%20Service%20Name\authcfg=

but I would prefer to add them using Python if possible.

Answer 1

See qgis.core.QgsSettings

Instantiate QgsSettings() in the QGIS console and you can access all the settings as keys/values

For ArcGIS FeatureServer, try:

[i for i in QSettings().allKeys() if 'arcgisfeatureserver' in i]

which will show all the keys for the featureserver settings.

For each feature service [SERVICENAME] and parameter [PARAM] the key [KEY] will be in the form:

'qgis/connections-arcgisfeatureserver/[SERVICENAME]/[PARAM]'

Which you can set using QgsSettings().setValue([KEY], [VALUE])

So for your feature service you would have

QgsSettings().setValue('qgis/connections-arcgisfeatureserver/[SERVICENAME]/url', [URL])
QgsSettings().setValue('qgis/connections-arcgisfeatureserver/[SERVICENAME]/username', [USERNAME])
QgsSettings().setValue('qgis/connections-arcgisfeatureserver/[SERVICENAME]/password', [PASSWORD])
QgsSettings().setValue('qgis/connections-arcgisfeatureserver/[SERVICENAME]/authcfg', '')

Then update the GUI with

iface.reloadConnections()

I think PyQt's QSettings() does the same thing too.