def set_headers(self, stream):
"""Given an HTTP stream, parse and store the message headers.
The HTTP stream must be positioned at the second line of a request.
The message headers are read and a new Message instance is added to
self. This instance will be updated in set_body once the body has been
read. We have to do this in two stages because the length of the body is
communicated to us via the headers.
"""
# Read in everything until the next blank line, parsing as we go.
# ===============================================================
raw_headers = []
parser_ = FeedParser()
for line in stream:
raw_headers.append(line)
parser_.feed(line)
if line == '\r\n':
break
# Now store on self.
# ==================
self.raw.extend(raw_headers)
self.raw_headers = ''.join(raw_headers)
self.message = parser_.close()
def lineReceived(self, line):
log.debug("Line In: %s"%line)
self.parser = FeedParser(Event)
self.parser.feed(line)
self.message = self.parser.close()
#if self.state is not READ_CONTENT (i.e Content-Type is already read) and the Content-Length is present
#read rest of the message and set it as payload
if self.message.has_key('Content-Length') and self.state!= 'READ_CONTENT':
if self.enterRawMode():
log.debug("Entering raw mode to read message payload")
return
try:
self.inspectMessage()
except:
log.error("Exception in message processing ", exc_info=True)
def parse_headers(self):
parser = FeedParser()
while True:
line = self.f.readline()
self.hbuf.write(line)
parser.feed(line)
if not line.strip(): break
self.m = parser.close()
L = self.parse_addrs('from')
self.h_from = L and L[0] or None
self.h_to = self.parse_addrs('to')
self.h_cc = self.parse_addrs('cc')
self.h_rcpts = self.h_to + self.h_cc
self.h_subject = decode_header(self.m.get('subject'))
self.h_subject_len1 = len(self.h_subject)
self.h_subject = self.h_subject.replace(' ', '')
self.h_subject = self.h_subject.replace(u' ', '')
self.h_subject_len2 = len(self.h_subject)
def parse_headers(self):
parser = FeedParser()
while True:
line = self.f.readline()
self.hbuf.write(line)
parser.feed(line)
if not line.strip(): break
self.m = parser.close()
L = self.parse_addrs('from')
self.h_from = L and L[0] or None
self.h_to = self.parse_addrs('to')
self.h_cc = self.parse_addrs('cc')
self.h_rcpts = self.h_to + self.h_cc
self.h_subject = decode_header(self.m.get('subject'))
self.h_subject_len1 = len(self.h_subject)
self.h_subject = self.h_subject.replace(' ', '')
self.h_subject = self.h_subject.replace(u' ', '')
self.h_subject_len2 = len(self.h_subject)
def parse(self, fp, headersonly=False):
feedparser = FeedParser(self._class)
if headersonly:
feedparser._set_headersonly()
while True:
data = fp.read(8192)
if not data:
break
feedparser.feed(data)
return feedparser.close()
def parse(self, fp, headersonly = False):
feedparser = FeedParser(self._class)
if headersonly:
feedparser._set_headersonly()
while True:
data = fp.read(8192)
if not data:
break
feedparser.feed(data)
return feedparser.close()
def parse(self, fp, headersonly=False):
"""Create a message structure from the data in a file.
Reads all the data from the file and returns the root of the message
structure. Optional headersonly is a flag specifying whether to stop
parsing after reading the headers or not. The default is False,
meaning it parses the entire contents of the file.
"""
feedparser = FeedParser(self._class)
if headersonly:
feedparser._set_headersonly()
while True:
data = fp.read(8192)
if not data:
break
feedparser.feed(data)
return feedparser.close()
def parse(self, fp, headersonly=False):
"""Create a message structure from the data in a file.
Reads all the data from the file and returns the root of the message
structure. Optional headersonly is a flag specifying whether to stop
parsing after reading the headers or not. The default is False,
meaning it parses the entire contents of the file.
"""
feedparser = FeedParser(self._class)
if headersonly:
feedparser._set_headersonly()
while True:
data = fp.read(8192)
if not data:
break
feedparser.feed(data)
return feedparser.close()
def _handle_upload(self, headers, registry, parser):
# file upload handling
# mime parser
from email.FeedParser import FeedParser
fp = FeedParser()
# need header
content_type = headers['content-type']
fp.feed('CONTENT-TYPE: %s\n' % content_type)
# size limit
size_limit = self.stdin_size_limit
# read in chunks
chunk_size = 8192
# number of chunks
n = size_limit / chunk_size
# feed contents from stdin to parser
import sys
i = 0
succeeded = False
while i < n:
data = sys.stdin.read(chunk_size)
if not data:
succeeded = True
break
fp.feed(data)
continue
if not succeeded:
raise RuntimeError, "stdin too large"
# parsed is a mime instance
parsed = fp.close()
#
header = 'Content-Disposition'
if self.inventory.debug:
self._cgi_inputs['uploaded mime'] = parsed.as_string()
args = []
uploads = {}
for part in parsed.walk():
if part.get_content_maintype() == 'multipart':
# this part is the parent message it self, skip
continue
filename = part.get_param('filename', header=header)
if filename:
# this means we are dealing with a real file
# save them to a dictionary so that later actors can handle them
content = part.get_payload(decode=True)
uploads[filename] = content
else:
# just a key,value pair
key = part.get_param('name', header=header)
value = part.get_payload()
args.append((key, value))
# pass key,value pairs to pyre option registry
arg = '&'.join(['%s=%s' % (k, v) for k, v in args])
if arg: parser.parse(registry, arg, 'form')
self._uploads = uploads
return
def __init__(self,path):
fp = FeedParser()
charset = chardet.detect(open(path).read())
fp.feed(codecs.open(path,encoding = charset["encoding"]).read())
self.m = fp.close()
class FSProtocol(basic.LineReceiver):
"""FreeSWITCH EventSocket protocol implementation.
All the FreeSWITCH api and dptool commands are defined in this class
"""
delimiter="\n\n"
jobType = False
state = "READ_CONTENT"
def connectionMade(self):
self.contentCallbacks = {"auth/request":self.auth,
"api/response":self.onAPIReply,
"command/reply":self.onCommandReply,
"text/event-plain":self.onEvent,
"text/disconnect-notice":self.disconnectNotice
}
self.pendingJobs = []
self.pendingBackgroundJobs = {}
self.eventCallbacks = {}
self.customEventCallbacks = {}
self.subscribedEvents = []
log.info("Connected to FreeSWITCH")
def connectionLost(self, reason):
log.info("Cleaning up")
self.disconnectedFromFreeSWITCH()
def disconnectedFromFreeSWITCH(self):
"""Over-ride this to get notified of FreeSWITCH disconnection"""
pass
def registerEvent(self, event,subscribe, function, *args, **kwargs):
"""Register a callback for the event
event -- (str) Event name as sent by FreeSWITCH , Custom events should give subclass also
eg : CUSTOM conference::maintenance
subsribe -- (bool) if True subscribe to this event
function -- callback function accepts a event dictionary as first argument
args -- argumnet to be passed to callback function
kwargs -- keyword arguments to be passed to callback function
returns instance of EventCallback , keep a reference of this around if you want to deregister it later
"""
if subscribe:
if self.needToSubscribe(event):
self.subscribeEvents(event)
ecb = EventCallback(event, function, *args, **kwargs)
ecb_list = self.eventCallbacks.get(event, [])
event_callbacks = self.eventCallbacks
#handle CUSTOM events
if event.startswith("CUSTOM"):
subclass = event.split(' ')
event = subclass[1]
ecb.subclass = event
ecb_list = self.customEventCallbacks.get(event, [])
event_callbacks = self.customEventCallbacks
ecb_list.append(ecb)
event_callbacks[event] = ecb_list
return ecb
def needToSubscribe(self, event):
"""Decide if we need to subscribe to an event or not by comparing the event provided against already subscribeEvents
event -- (str) event name
returns bool
"""
if "all" in self.subscribedEvents:
return False
if event in self.subscribedEvents:
return False
if 'myevents' in self.subscribedEvents:
return False
else:
return True
def deregisterEvent(self,ecb):
"""Deregister a callback for the given event
ecb -- (EventCallback) instance of EventCallback object
"""
callbacks_list = self.eventCallbacks
if ecb.eventname == 'CUSTOM':
callbacks_list = self.customEventCallbacks
ecbs = callbacks_list[ecb.eventname]
try:
ecbs.remove(ecb)
except ValueError:
log.error("%s already deregistered "%ecb)
def dataReceived(self, data):
"""
We override this twisted method to avoid being disconnected by default MAX_LENGTH for messages which cross
that limit
"""
if self._busyReceiving:
self._buffer += data
return
try:
self._busyReceiving = True
self._buffer += data
while self._buffer and not self.paused:
if self.line_mode:
try:
line, self._buffer = self._buffer.split(
self.delimiter, 1)
except ValueError:
return
else:
why = self.lineReceived(line)
if (why or self.transport and
self.transport.disconnecting):
return why
else:
data = self._buffer
self._buffer = b''
why = self.rawDataReceived(data)
if why:
return why
finally:
self._busyReceiving = False
def lineReceived(self, line):
log.debug("Line In: %s"%line)
self.parser = FeedParser(Event)
self.parser.feed(line)
self.message = self.parser.close()
#if self.state is not READ_CONTENT (i.e Content-Type is already read) and the Content-Length is present
#read rest of the message and set it as payload
if self.message.has_key('Content-Length') and self.state!= 'READ_CONTENT':
if self.enterRawMode():
log.debug("Entering raw mode to read message payload")
return
try:
self.inspectMessage()
except:
log.error("Exception in message processing ", exc_info=True)
def rawDataReceived(self, data):
"""Read length of raw data specified by self.contentLength and set it as message payload """
log.debug("Data In : %s"%data)
self.rawdataCache = ''.join([self.rawdataCache, data])
if len(self.rawdataCache) >= self.contentLength-1:
self.clearLineBuffer()
extra = self.rawdataCache[self.contentLength:]
currentResult = self.rawdataCache[:self.contentLength]
self.message.set_payload(currentResult)
try:
self.inspectMessage()
except:
log.error("Exception in message processing ", exc_info=True)
self.setLineMode(extra)
def enterRawMode(self):
"""
Change to raw mode from line mode if self.contentLength > 0
"""
self.contentLength = int(self.message['Content-Length'].strip())
if self.contentLength > 0:
self.rawdataCache =''
self.setRawMode()
return True
return False
def inspectMessage(self):
"""Inspect message and dispatch based on self.state or Content-Type of message """
if self.state == "READ_EVENT":
return self.dispatchEvent()
if self.state == "READ_CHANNELINFO":
return self.onConnect()
if self.state == 'READ_API':
return self.fireAPIDeferred()
if not self.message.has_key("Content-Type"):
return
ct = self.message['Content-Type']
try:
cb = self.contentCallbacks[ct]
cb()
except KeyError:
log.error("Got unimplemented Content-Type : %s"%ct)
def dispatchEvent(self):
self.state = "READ_CONTENT"
eventname = self.message['Event-Name']
#Handle background job event
if eventname == "BACKGROUND_JOB":
try:
df = self.pendingBackgroundJobs.pop(self.message['Job-UUID'])
df.callback(self.message)
except KeyError:
log.error("Stray BACKGROUND_JOB event received %s", self.message['Job-UUID'])
except:
log.error("Error in BACKGROUND_JOB event handler", exc_info=True)
if eventname == 'CUSTOM':
self.message.decode()
ecbs = self.customEventCallbacks.get(self.message['Event-Subclass'], None)
else:
ecbs = self.eventCallbacks.get(eventname, None)
if ecbs is None:
return
for ecb in ecbs:
try:
ecb.func(self.message, *ecb.args, **ecb.kwargs)
except:
log.error("Message %s\nError in event handler %s on event %s:"%(self.message, ecb.func, eventname), exc_info=True)
def onConnect(self):
"""Channel Information is ready to be read.
"""
log.info("onconnect")
def auth(self):
"""
FreeSWITCH is requesting to authenticate
"""
pass
def fireAPIDeferred(self):
self.state = 'READ_CONTENT'
df = self.pendingJobs.pop(0)
df.callback(self.message)
def onAPIReply(self):
"""
Handle API reply
"""
if not self.message.has_key("Content-Length"):
self.currentDeferred = self.pendingJobs.pop(0)
return self.currentDeferred.callback(self.message)
if self.enterRawMode():
self.state = "READ_API"
log.debug("Entering raw mode to read API response")
return
else:
self.currentDeferred.callback(self.message)
def onCommandReply(self):
"""
Handle CommandReply
"""
if self.message.has_key("Job-UUID"):
return
try:
df = self.pendingJobs.pop(0)
except IndexError:
log.error("Command reply message received with out pending deferred %s"%self.message)
return
if self.message['Reply-Text'].startswith("+OK"):
df.callback(self.message)
else:
e = CommandError(self.message['Reply-Text'])
df.errback(e)
def onEvent(self):
"""
Handle a new event
"""
self.state = "READ_EVENT"
def disconnectNotice(self):
"""
Handle disconnect notice
"""
if not self.message.has_key("Content-Length"):
return self.disconnectNoticeReceived(self.message)
self.contentLength = int(self.message['Content-Length'])
if self.contentLength>0:
self.currentDeferred = defer.Deferred()
log.info("Enter raw mode to read disconnect notice")
self.rawdataCache = ''
self.setRawMode()
else:
self.disconnectNoticeReceived(self.message)
def disconnectNoticeReceived(self, msg):
"""Override this to receive disconnect notice from FreeSWITCH"""
log.error("disconnectNoticeReceived not implemented")
log.info(msg)
def sendData(self, cmd, args=''):
df = defer.Deferred()
#self.pendingJobs.append((cmd, df))
self.pendingJobs.append(df)
if args:
cmd = ' '.join([cmd, args])
self.sendLine(cmd)
log.debug("Line Out: %r"%cmd)
return df
def sendMsg(self, msg):
"""Send message to FreeSWITCH
msg -- (event) Event object
"""
df = defer.Deferred()
self.pendingJobs.append(df)
msg = msg.as_string(True)
self.transport.write(msg)
log.debug("Line Out: %r"%msg)
return df
def sendCommand(self, cmd, args='', uuid='', lock=True):
msg = Event()
if uuid:
msg.set_unixfrom("SendMsg %s"%uuid)
else:
msg.set_unixfrom("SendMsg")
msg['call-command'] = "execute"
msg['execute-app-name'] = cmd
if args:
msg['execute-app-arg'] = args
if lock:
msg['event-lock'] = "true"
return self.sendMsg(msg)
def sendAPI(self, apicmd, background=jobType):
if background:
return self.sendBGAPI(apicmd)
else:
return self.sendData("api", apicmd)
def sendBGAPI(self, apicmd):
jobid = str(uuid.uuid1())
apicmd = ' '.join(['bgapi', apicmd])
apicmd = '\n'.join([apicmd, "Job-UUID:%s"%jobid])
backgroundJobDeferred = defer.Deferred()
self.pendingBackgroundJobs[jobid] = backgroundJobDeferred
log.debug("Line Out: %r", apicmd)
self.sendLine(apicmd)
return backgroundJobDeferred
def subscribeEvents(self, events):
"""Subscribe to FreeSWITCH events.
events -(str) 'all' subscribe to all events or event names separated by space
this method can subscribe to multiple events but if the event is of CUSTOM type
then only one CUSTOM event with subclass should be given
"""
_events = []
if not events.startswith("CUSTOM"):
_events = events.split(' ')
for event in _events:
self.subscribedEvents.append(events)
return self.sendData("event plain", events)
def myevents(self, uuid=''):
"""Tie up the connection to particular channel events"""
self.subscribedEvents.append("myevents")
if uuid:
return self.sendData("myevents %s"%uuid)
else:
return self.sendData("myevents")
def apiAvmd(self, uuid, start=True, background=jobType):
"""Execute avmd on provided channel.
uuid (str) -- uuid of the target channel
start (bool) -- If True avmd will start if false avmd will be stopped
"""
if start:
return self.sendAPI("avmd %s start"%uuid, background)
else:
return self.sendAPI("avmd %s stop"%uuid, background)
def apiConferenceDial(self, name, url, background=jobType):
"""Dial the given url from conference
name -- (str) name of the conference
url -- (str) FreeSWITCH compatible call URL"""
cmd = 'conference %s dial %s'%(name, url)
return self.sendAPI(cmd, background)
def apiConferenceKick(self,name, member, background=jobType):
"""Kick the given member from conference
name -- (str) name of the conference
member -- (str) member id or all or last
"""
cmd = "conference %s kick %s"%(name, member)
return self.sendAPI(cmd, background)
def apiConferenceList(self, name=None, delim=None, background=jobType):
"""List the conference
name - (str) name of the conference. if not given all the conferences will be listed
delim - (str) delimiter to use for separating values """
cmd = "conference"
if name is not None:
cmd = ' '.join([cmd, name, 'list'])
else:
cmd = ' '.join([cmd,'list'])
if delim is not None:
cmd = ' '.join([cmd, 'delim',delim])
return self.sendAPI(cmd, background)
def apiConferenceListCount(self, name, background=True):
"""Return number of members in the conference
name -- (str) name of the conference
"""
cmd = 'conference %s list count'%name
return self.sendAPI(cmd, background)
def apiConferenceVolume(self, name, member, value=0, direction='out', background=jobType):
"""Set volume of conference
name -- (str) name of the conference
memeber -- (str) member id or all or last
value -- (int) 0 - 4
direction -- (str) in or out"""
cmd = "conference %s volume_%s %s %s"%(name, direction, member, value)
return self.sendAPI(cmd, background)
def apiConferenceMute(self, name, member, background=jobType):
"""Mute given member in a conference
name -- (str) name of the conference
member -- (str) member id or all or last
"""
cmd = "conference %s mute %s"%(name, member)
return self.sendAPI(cmd, background)
def apiConferencePlay(self, name, filename, member=None, background=jobType):
"""Playback given file in conference
name -- (str) name of the conference
filename -- (str) name of the audio file to be played in conference
member -- (str) member id in conference
"""
if member:
cmd = "conference %s play %s %s"%(name, filename, member)
else:
cmd = "conference %s play %s"%(name, filename,)
return self.sendAPI(cmd, background)
def apiConferenceStop(self, name, fid=None, member=None, background=jobType):
"""Stop an ongoing/queued playback in conference
name -- (str) name of the conference
fid -- (str) file ID to stop takes all|async|current|last
member -- (str) member id in conference
"""
if member:
cmd = "conference %s stop %s %s"%(name, fid, member)
elif fid:
cmd = "conference %s stop %s"%(name, fid)
else:
cmd = "conference %s stop"%(name, )
return self.sendAPI(cmd, background)
def apiConferenceUnMute(self, name, member, background=jobType):
"""UnMute given member in a conference
name -- (str) name of the conference
member -- (str) member id or all or last
"""
cmd = "conference %s unmute %s"%(name, member)
return self.sendAPI(cmd, background)
def apiDomainExists(self, domain, background=jobType):
cmd = "domain_exists %s"%domain
return self.sendAPI(cmd, background)
def apiGlobalGetVar(self,variable='', background=jobType):
"""Get the value of a global variable
variable -- name of the variable
returns the value of the provided global variable if argument variable is not present then all global variables are returned.
"""
apicmd = ' '.join(["global_getvar", variable])
df = self.sendAPI(apicmd, background)
if variable != '':
return df
else:
finalDF = defer.Deferred()
df.addCallback(self._parseGlobalGetVar,finalDF)
return finalDF
def _parseGlobalGetVar(self, result, df):
result = result.get_payload()
res = result.strip().split("\n")
finalResult = {}
try:
for r in res:
k, v = r.split("=", 1)
finalResult[k] = v
else:
df.callback(finalResult)
except Exception, err:
log.error(err)
