[PATCH phosphor-rest-server] The streaming support for obmc-rest.
OpenBMC Patches
openbmc-patches at stwcx.xyz
Thu Jan 28 19:00:37 AEDT 2016
From: shgoupf <shgoupf at cn.ibm.com>
Changes:
1) The main idea of this change is to have a streaming path as below:
dbus signal -> obmc-rest capture the dbus signal -> obmc-rest notify the client of the signal receiving.
2) Replace rocket with gevent WSGI server to support multiple async accesses.
3) Use gevent queue to notify the dbus signal receiving.
4) The uri to the streaming should be in the form as below:
https://<ip>/<path>/stream/<signal_name>
---
obmc-rest | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 104 insertions(+), 11 deletions(-)
mode change 100644 => 100755 obmc-rest
diff --git a/obmc-rest b/obmc-rest
old mode 100644
new mode 100755
index c6d2949..481dafa
--- a/obmc-rest
+++ b/obmc-rest
@@ -3,7 +3,9 @@
import os
import sys
import dbus
+import gobject
import dbus.exceptions
+import dbus.mainloop.glib
import json
import logging
from xml.etree import ElementTree
@@ -14,6 +16,10 @@ from OpenBMCMapper import Mapper, PathTree, IntrospectionNodeParser, ListMatch
import spwd
import grp
import crypt
+import threading
+import gevent
+from gevent.pywsgi import WSGIServer
+from gevent.queue import Queue
DBUS_UNKNOWN_INTERFACE = 'org.freedesktop.UnknownInterface'
DBUS_UNKNOWN_METHOD = 'org.freedesktop.DBus.Error.UnknownMethod'
@@ -59,12 +65,13 @@ def makelist(data):
class RouteHandler(object):
_require_auth = makelist(valid_user)
- def __init__(self, app, bus, verbs, rules):
+ def __init__(self, app, bus, verbs, rules, skips = []):
self.app = app
self.bus = bus
self.mapper = Mapper(bus)
self._verbs = makelist(verbs)
self._rules = rules
+ self._skips = skips
def _setup(self, **kw):
request.route_data = {}
@@ -79,7 +86,7 @@ class RouteHandler(object):
return getattr(self, 'do_' + request.method.lower())(**kw)
def install(self):
- self.app.route(self._rules, callback = self,
+ self.app.route(self._rules, callback = self, skip = self._skips,
method = ['GET', 'PUT', 'PATCH', 'POST', 'DELETE'])
@staticmethod
@@ -108,6 +115,58 @@ class RouteHandler(object):
return None
raise
+class SignalHandler(RouteHandler):
+ verbs = ['GET']
+ rules = '<path:path>/stream/<signal>'
+
+ def __init__(self, app, bus):
+ super(SignalHandler, self).__init__(
+ app, bus, self.verbs, self.rules)
+
+ def find(self, path, signal):
+ busses = self.try_mapper_call(self.mapper.get_object,
+ path = path)
+ for items in busses.iteritems():
+ s = self.find_signal_on_bus(path, signal, *items)
+ if s:
+ return s
+
+ abort(404, _4034_msg %('signal', 'found', signal))
+
+ def setup(self, path, signal):
+ request.route_data['map'] = self.find(path, signal)
+
+ def do_get(self, path, signal):
+ body = Queue()
+ dsignal = DbusSignal(bus, request.route_data['map'][0],
+ request.route_data['map'][1], path)
+ dsignal.onData(body.put)
+ dsignal.onFinish(lambda: body.put(StopIteration))
+ dsignal.signalSnooping()
+ return body
+
+ @staticmethod
+ def find_signal(signal, signals):
+ if signals is None:
+ return None
+
+ signal = find_case_insensitive(signal, signals.keys())
+ if signal is not None:
+ return signal
+
+ def find_signal_on_bus(self, path, signal, bus, interfaces):
+ obj = self.bus.get_object(bus, path, introspect = False)
+ iface = dbus.Interface(obj, dbus.INTROSPECTABLE_IFACE)
+ data = iface.Introspect()
+ parser = IntrospectionNodeParser(
+ ElementTree.fromstring(data),
+ intf_match = ListMatch(interfaces))
+ for x,y in parser.get_interfaces().iteritems():
+ s = self.find_signal(signal,
+ y.get('signal'))
+ if s:
+ return (x,s)
+
class DirectoryHandler(RouteHandler):
verbs = 'GET'
rules = '<path:path>/'
@@ -715,7 +774,8 @@ class RestApp(Bottle):
self.install(JSONPlugin(**json_kw))
self.install(JsonApiErrorsPlugin(**json_kw))
self.install(AuthorizationPlugin())
- self.install(JsonApiResponsePlugin())
+ self.json_response_plugin = JsonApiResponsePlugin()
+ self.install(self.json_response_plugin)
self.install(JsonApiRequestPlugin())
self.install(JsonApiRequestTypePlugin())
@@ -726,6 +786,7 @@ class RestApp(Bottle):
def create_handlers(self):
# create route handlers
+ self.signal_handler = SignalHandler(self, self.bus)
self.session_handler = SessionHandler(self, self.bus)
self.directory_handler = DirectoryHandler(self, self.bus)
self.list_names_handler = ListNamesHandler(self, self.bus)
@@ -736,6 +797,11 @@ class RestApp(Bottle):
self.instance_handler = InstanceHandler(self, self.bus)
def install_handlers(self):
+ # Skip json response for signal handler because it requires to
+ # return a gevent iterable which cannot be handled by json
+ # response plugin
+ self.signal_handler._skips = [self.json_response_plugin]
+ self.signal_handler.install()
self.session_handler.install()
self.directory_handler.install()
self.list_names_handler.install()
@@ -766,21 +832,48 @@ class RestApp(Bottle):
parts = filter(bool, path.split('/'))
request.environ['PATH_INFO'] = '/' + '/'.join(parts) + trailing
+class DbusSignal():
+ def __init__(self, bus, dbus_interface, signal_name, path):
+ # Register the dbus recieve handler
+ bus.add_signal_receiver(self.signalReciever,
+ dbus_interface = dbus_interface,
+ signal_name = signal_name,
+ path = path)
+
+ self.snooping = True
+
+ def signalReciever(self, msg):
+ self.send("Recieved message: %s" % msg)
+ self.snooping = False
+
+ def onData(self, send):
+ self.send = send
+
+ def onFinish(self, f):
+ self.finish = f
+
+ def signalSnooping(self):
+ while self.snooping:
+ mainloop = gobject.MainLoop()
+ gevent.sleep(1)
+ gobject.timeout_add(1, mainloop.quit)
+ mainloop.run()
+
+ self.finish()
+
if __name__ == '__main__':
log = logging.getLogger('Rocket.Errors')
log.setLevel(logging.INFO)
log.addHandler(logging.StreamHandler(sys.stdout))
+ dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
app = RestApp(bus)
+
default_cert = os.path.join(sys.prefix, 'share',
os.path.basename(__file__), 'cert.pem')
- server = Rocket(('0.0.0.0',
- 443,
- default_cert,
- default_cert),
- 'wsgi', {'wsgi_app': app},
- min_threads = 1,
- max_threads = 1)
- server.start()
+ server = WSGIServer(("0.0.0.0", 443), app, keyfile = default_cert,
+ certfile = default_cert)
+
+ server.serve_forever()
--
2.6.4
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