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=============================
Middlewares and configuration
=============================
Middlewares can be configured in multiple fashion depending of the
application needs. Here is some use-cases:
Configuration from the application
----------------------------------
The application code will looks like::
from oslo_middleware import sizelimit
from oslo_config import cfg
conf = cfg.ConfigOpts()
app = sizelimit.RequestBodySizeLimiter(your_wsgi_application, conf)
Configuration with paste-deploy and the oslo.config
---------------------------------------------------
The paste filter (in /etc/my_app/api-paste.ini) will looks like::
[filter:sizelimit]
use = egg:oslo.middleware#sizelimit
# In case of the application doesn't use the global oslo.config
# object. The middleware must known the app name to load
# the application configuration, by setting this:
# oslo_config_project = my_app
# In some cases, you may need to specify the program name for the project
# as well.
# oslo_config_program = my_app-api
The oslo.config file of the application (eg: /etc/my_app/my_app.conf) will looks like::
[oslo_middleware]
max_request_body_size=1000
Configuration with pastedeploy only
-----------------------------------
The paste filter (in /etc/my_app/api-paste.ini) will looks like::
[filter:sizelimit]
use = egg:oslo.middleware#sizelimit
max_request_body_size=1000
This will override any configuration done via oslo.config
.. note::
healtcheck middleware does not yet use oslo.config, see :doc:`../reference/healthcheck_plugins`
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