def save():
"""Save any changed session data."""
if not hasattr(cherrypy.serving, 'session'):
return
request = cherrypy.serving.request
response = cherrypy.serving.response
# Guard against running twice
if hasattr(request, '_sessionsaved'):
return
request._sessionsaved = True
if response.stream:
# If the body is being streamed, we have to save the data
# *after* the response has been written out
request.hooks.attach('on_end_request', cherrypy.session.save)
else:
# If the body is not being streamed, we save the data now
# (so we can release the lock).
if is_iterator(response.body):
response.collapse_body()
cherrypy.session.save()
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