# pypad.py
#
# PAD processor for Rivendell
#
# (C) Copyright 2018-2020 Fred Gleason <fredg@paravelsystems.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import os.path
import configparser
import datetime
import MySQLdb
import signal
import selectors
import socket
import sys
import syslog
import json
from urllib.parse import quote
#
# Enumerated Constants (sort of)
#
# Escape types
#
ESCAPE_NONE=0
ESCAPE_XML=1
ESCAPE_URL=2
ESCAPE_JSON=3
#
# PAD Types
#
TYPE_NOW='now'
TYPE_NEXT='next'
#
# Field Names
#
FIELD_START_DATETIME='startDateTime'
FIELD_LINE_NUMBER='lineNumber'
FIELD_LINE_ID='lineId'
FIELD_CART_NUMBER='cartNumber'
FIELD_CART_TYPE='cartType'
FIELD_CUT_NUMBER='cutNumber'
FIELD_LENGTH='length'
FIELD_YEAR='year'
FIELD_GROUP_NAME='groupName'
FIELD_TITLE='title'
FIELD_ARTIST='artist'
FIELD_PUBLISHER='publisher'
FIELD_COMPOSER='composer'
FIELD_ALBUM='album'
FIELD_LABEL='label'
FIELD_CLIENT='client'
FIELD_AGENCY='agency'
FIELD_CONDUCTOR='conductor'
FIELD_USER_DEFINED='userDefined'
FIELD_SONG_ID='songId'
FIELD_OUTCUE='outcue'
FIELD_DESCRIPTION='description'
FIELD_ISRC='isrc'
FIELD_ISCI='isci'
FIELD_EXTERNAL_EVENT_ID='externalEventId'
FIELD_EXTERNAL_DATA='externalData'
FIELD_EXTERNAL_ANNC_TYPE='externalAnncType'
#
# Default TCP port for connecting to Rivendell's PAD service
#
PAD_TCP_PORT=34289
class Update(object):
def __init__(self,pad_data,config,rd_config):
self.__fields=pad_data
self.__config=config
self.__rd_config=rd_config
def __fromIso8601(self,string):
try:
return datetime.datetime.strptime(string.strip()[:19],'%Y-%m-%dT%H:%M:%S')
except AttributeError:
return ''
def __escapeXml(self,string):
string=string.replace("&","&")
string=string.replace("<","<")
string=string.replace(">",">")
string=string.replace("'","'")
string=string.replace("\"",""")
return string
def __escapeWeb(self,string):
string=quote(string)
return string
def __escapeJson(self,string):
string=string.replace("\\","\\\\")
string=string.replace("\"","\\\"")
string=string.replace("/","\\/")
string=string.replace("\b","\\b")
string=string.replace("\f","\\f")
string=string.replace("\n","\\n")
string=string.replace("\r","\\r")
string=string.replace("\t","\\t")
return string
def __replaceWildcard(self,wildcard,sfield,stype,string,esc):
try:
if isinstance(self.__fields['padUpdate'][stype][sfield],str):
string=string.replace('%'+wildcard,self.escape(self.__fields['padUpdate'][stype][sfield],esc))
else:
if self.__fields['padUpdate'][stype][sfield] is None:
string=string.replace('%'+wildcard,'')
else :
string=string.replace('%'+wildcard,str(self.__fields['padUpdate'][stype][sfield]))
except TypeError:
string=string.replace('%'+wildcard,'')
except KeyError:
string=string.replace('%'+wildcard,'')
return string
def __replaceWildcardPair(self,wildcard,sfield,string,esc):
string=self.__replaceWildcard(wildcard,sfield,'now',string,esc);
string=self.__replaceWildcard(wildcard[0].upper()+wildcard[1:],sfield,'next',string,esc);
return string;
def __findDatetimePattern(self,pos,wildcard,string):
start=string.find('%'+wildcard+'(',pos)
if start>=0:
end=string.find(")",start+3)
if end>0:
return (end+2,string[start:end+1])
return None
def __replaceDatetimePattern(self,string,pattern):
stype='now'
if pattern[1]=='D':
stype='next'
try:
dt=self.__fromIso8601(self.__fields['padUpdate'][stype]['startDateTime'])
except TypeError:
string=string.replace(pattern,'')
return string
dt_pattern=pattern[3:-1]
try:
#
# Process Times
#
miltime=(dt_pattern.find('ap')<0)and(dt_pattern.find('AP')<0)
if not miltime:
if dt.hour<13:
dt_pattern=dt_pattern.replace('ap','am')
dt_pattern=dt_pattern.replace('AP','AM')
else:
dt_pattern=dt_pattern.replace('ap','pm')
dt_pattern=dt_pattern.replace('AP','PM')
if miltime:
dt_pattern=dt_pattern.replace('hh',dt.strftime('%H'))
dt_pattern=dt_pattern.replace('h',str(dt.hour))
else:
dt_pattern=dt_pattern.replace('hh',dt.strftime('%I'))
hour=dt.hour
if hour==0:
hour=12
dt_pattern=dt_pattern.replace('h',str(hour))
dt_pattern=dt_pattern.replace('mm',dt.strftime('%M'))
dt_pattern=dt_pattern.replace('m',str(dt.minute))
dt_pattern=dt_pattern.replace('ss',dt.strftime('%S'))
dt_pattern=dt_pattern.replace('s',str(dt.second))
#
# Process Dates
#
dt_pattern=dt_pattern.replace('MMMM',dt.strftime('%B'))
dt_pattern=dt_pattern.replace('MMM',dt.strftime('%b'))
dt_pattern=dt_pattern.replace('MM',dt.strftime('%m'))
dt_pattern=dt_pattern.replace('M',str(dt.month))
dt_pattern=dt_pattern.replace('dddd',dt.strftime('%A'))
dt_pattern=dt_pattern.replace('ddd',dt.strftime('%a'))
dt_pattern=dt_pattern.replace('dd',dt.strftime('%d'))
dt_pattern=dt_pattern.replace('d',str(dt.day))
dt_pattern=dt_pattern.replace('yyyy',dt.strftime('%Y'))
dt_pattern=dt_pattern.replace('yy',dt.strftime('%y'))
except AttributeError:
string=string.replace(pattern,'')
return string
string=string.replace(pattern,dt_pattern)
return string
def __replaceDatetimePair(self,string,wildcard):
pos=0
pattern=(0,'')
while(pattern!=None):
pattern=self.__findDatetimePattern(pattern[0],wildcard,string)
if pattern!=None:
string=self.__replaceDatetimePattern(string,pattern[1])
return string
def config(self):
"""
If a valid configuration file was set in
'pypad.Receiver::setConfigFile()', this will return a
parserconfig object created from it. If no configuration file
was specified, returns None.
"""
return self.__config
def dateTimeString(self):
"""
Returns the date-time of the update in ISO 8601 format (string).
"""
return self.__fields['padUpdate']['dateTime']
def dateTime(self):
"""
Returns the date-time of the PAD update (datetime)
"""
return self.__fromIso8601(self.__fields['padUpdate']['dateTime'])
def escape(self,string,esc):
"""
Returns an 'escaped' version of the specified string.
Takes two arguments:
string - The string to be processed.
esc - The type of escaping to be applied. The following values
are valid:
pypad.ESCAPE_JSON - Escape for use in JSON string values
(as per ECMA-404)
pypad.ESCAPE_NONE - String is passed through unchanged
pypad.ESCAPE_URL - Escape for use in URLs
(as per RFC 2396)
pypad.ESCAPE_XML - Escape for use in XML
(as per XML-v1.0)
"""
if(esc==0):
return string
if(esc==1):
return self.__escapeXml(string)
if(esc==2):
return self.__escapeWeb(string)
if(esc==3):
return self.__escapeJson(string)
raise ValueError('invalid esc value')
def hostName(self):
"""
Returns the host name of the machine whence this PAD update
originated (string).
"""
return self.__fields['padUpdate']['hostName']
def shortHostName(self):
"""
Returns the short host name of the machine whence this PAD update
originated (string).
"""
return self.__fields['padUpdate']['shortHostName']
def machine(self):
"""
Returns the log machine number to which this update pertains
(integer).
"""
return self.__fields['padUpdate']['machine']
def mode(self):
"""
Returns the operating mode of the host log machine to which
this update pertains (string).
"""
return self.__fields['padUpdate']['mode']
def onairFlag(self):
"""
Returns the state of the on-air flag (boolean).
"""
return self.__fields['padUpdate']['onairFlag']
def hasService(self):
"""
Indicates if service information is included with this update
(boolean).
"""
try:
return self.__fields['padUpdate']['service']!=None
except TypeError:
return False;
def rivendellConfig(self):
"""
Returns a parserconfig object containing the contents of the
current rd.conf(5) file.
"""
return self.__rd_config
def serviceName(self):
"""
Returns the name of the service associated with this update (string).
"""
return self.__fields['padUpdate']['service']['name']
def serviceDescription(self):
"""
Returns the description of the service associated with this update
(string). Not to be confused with the 'description' field for a
cut!
"""
return self.__fields['padUpdate']['service']['description']
def serviceProgramCode(self):
"""
Returns the Program Code of the service associated with this update
(string).
"""
return self.__fields['padUpdate']['service']['programCode']
def hasLog(self):
"""
Indicates if log information is included with this update
(boolean).
"""
try:
return self.__fields['padUpdate']['log']!=None
except TypeError:
return False;
def logName(self):
"""
Returns the name of the log associated with this update (string).
"""
return self.__fields['padUpdate']['log']['name']
def resolvePadFields(self,string,esc):
"""
Takes two arguments:
string - A string containing one or more PAD wildcards, which it
will resolve into the appropriate values. See the
'Metadata Wildcards' section of the Rivendell Operations
Guide for a list of recognized wildcards.
esc - Character escaping to be applied to the PAD fields.
See the documentation for the 'escape()' method for valid
field values.
"""
#
# MAINTAINER'S NOTE: These mappings must be kept in sync with
# those of the 'RDLogLine::resolveWildcards()'
# method in 'lib/rdlog_line.cpp'.
#
string=self.__replaceWildcardPair('a','artist',string,esc)
string=self.__replaceWildcardPair('b','label',string,esc)
string=self.__replaceWildcardPair('c','client',string,esc)
string=self.__replaceDatetimePair(string,'d') # %d(<dt>) Handler
string=self.__replaceDatetimePair(string,'D') # %D(<dt>) Handler
string=self.__replaceWildcardPair('e','agency',string,esc)
#string=self.__replaceWildcardPair('f',sfield,string,esc) # Unassigned
string=self.__replaceWildcardPair('g','groupName',string,esc)
string=self.__replaceWildcardPair('h','length',string,esc)
string=self.__replaceWildcardPair('i','description',string,esc)
string=self.__replaceWildcardPair('j','cutNumber',string,esc)
# %k - Assigned for use for the Start Time for rdimport(1)
string=self.__replaceWildcardPair('l','album',string,esc)
string=self.__replaceWildcardPair('m','composer',string,esc)
string=self.__replaceWildcardPair('n','cartNumber',string,esc)
string=self.__replaceWildcardPair('o','outcue',string,esc)
string=self.__replaceWildcardPair('p','publisher',string,esc)
# %q - Assigned for use for the Start Date for rdimport(1)
string=self.__replaceWildcardPair('r','conductor',string,esc)
string=self.__replaceWildcardPair('s','songId',string,esc)
string=self.__replaceWildcardPair('t','title',string,esc)
string=self.__replaceWildcardPair('u','userDefined',string,esc)
secs=self.__replaceWildcard('v','length','now','%v',ESCAPE_NONE) # Length, rounded down
if(secs==''):
string=string.replace('%v','0')
else:
string=string.replace('%v',str(int(secs)//1000))
secs=self.__replaceWildcard('V','length','next','%V',ESCAPE_NONE)
if(secs==''):
string=string.replace('%V','0')
else:
string=string.replace('%V',str(int(secs)//1000))
string=self.__replaceWildcardPair('wc','isci',string,esc)
string=self.__replaceWildcardPair('wi','isrc',string,esc)
string=self.__replaceWildcardPair('wm','recordingMbId',string,esc)
string=self.__replaceWildcardPair('wr','releaseMbId',string,esc)
string=self.__replaceWildcardPair('x','lineId',string,esc) # Log Line ID
string=self.__replaceWildcardPair('y','year',string,esc)
string=self.__replaceWildcardPair('z','lineNumber',string,esc) # Log Line #
string=string.replace('\\b','\b')
string=string.replace('\\f','\f')
string=string.replace('\\n','\n')
string=string.replace('\\r','\r')
string=string.replace('\\t','\t')
return string
def hasPadType(self,pad_type):
"""
Indicates if this update includes the specified PAD type
Takes one argument:
pad_type - The type of PAD value. Valid values are:
pypad.TYPE_NOW - Now playing data
pypad.TYPE_NEXT - Next to play data
"""
try:
return self.__fields['padUpdate'][pad_type]!=None
except TypeError:
return False;
def startDateTimeString(self,pad_type):
"""
Returns the start date-time of the specified PAD type in ISO 8601
format (string).
Takes one argument:
pad_type - The type of PAD value. Valid values are:
pypad.TYPE_NOW - Now playing data
pypad.TYPE_NEXT - Next to play data
"""
return self.__fields['padUpdate'][pad_type]['startDateTime']
def startDateTime(self,pad_type):
"""
Returns the start datetime of the specified PAD type
Takes one argument:
pad_type - The type of PAD value. Valid values are:
pypad.TYPE_NOW - Now playing data
pypad.TYPE_NEXT - Next to play data
"""
try:
return self.__fromIso8601(self.__fields['padUpdate'][pad_type]['startDateTime'])
except AttributeError:
return None
def padField(self,pad_type,pad_field):
"""
Returns the raw value of the specified PAD field.
Takes two arguments:
pad_type - The type of PAD value. Valid values are:
pypad.TYPE_NOW - Now playing data
pypad.TYPE_NEXT - Next to play data
pad_field - The specific field. Valid values are:
pypad.FIELD_AGENCY - The 'Agency' field (string)
pypad.FIELD_ALBUM - The 'Album' field (string)
pypad.FIELD_ARTIST - The 'Artist' field (string)
pypad.FIELD_CART_NUMBER - The 'Cart Number' field
(integer)
pypad.FIELD_CART_TYPE - 'The 'Cart Type' field (string)
pypad.FIELD_CLIENT - The 'Client' field (string)
pypad.FIELD_COMPOSER - The 'Composer' field (string)
pypad.FIELD_CONDUCTOR - The 'Conductor' field (string)
pypad.FIELD_CUT_NUMER - The 'Cut Number' field (integer)
pypad.FIELD_DESCRIPTION - The cut 'Description' field
(string). Not to be confused
with the service description!
pypad.FIELD_EXTERNAL_ANNC_TYPE - The 'EXT_ANNC_TYPE'
field (string)
pypad.FIELD_EXTERNAL_DATA - The 'EXT_DATA' field
(string)
pypad.FIELD_EXTERNAL_EVENT_ID - The 'EXT_EVENT_ID'
field (string)
pypad.FIELD_GROUP_NAME - The 'GROUP_NAME' field (string)
pypad.FIELD_ISRC - The 'ISRC' field (string)
pypad.FIELD_ISCI - The 'ISCI' field (string)
pypad.FIELD_LABEL - The 'Label' field (string)
pypad.FIELD_LENGTH - The 'Length' field (integer)
pypad.FIELD_LINE_ID - The log line ID (integer)
pypad.FIELD_LINE_NUMBER - The log line number (integer)
pypad.FIELD_OUTCUE - The 'Outcue' field (string)
pypad.FIELD_PUBLISHER - The 'Publisher' field (string)
pypad.FIELD_SONG_ID - The 'Song ID' field (string)
pypad.FIELD_START_DATETIME - The 'Start DateTime field
(string)
pypad.FIELD_TITLE - The 'Title' field (string)
pypad.FIELD_USER_DEFINED - 'The 'User Defined' field
(string)
pypad.FIELD_YEAR - The 'Year' field (integer)
"""
return self.__fields['padUpdate'][pad_type][pad_field]
def resolveFilepath(self,string,dt):
"""
Returns a string with any Rivendell Filepath wildcards resolved
(See Appdendix C of the Rivendell Operations Guide for a list).
Takes two arguments:
string - The string to resolve.
dt - A Python 'datetime' object to use for the resolution.
"""
ret=''
upper_case=False
initial_case=False
offset=0
i=0
while i<len(string):
field=''
offset=0;
if string[i]!='%':
ret+=string[i]
else:
i=i+1
offset=offset+1
if string[i]=='^':
upper_case=True
i=i+1
offset=offset+1
else:
upper_case=False
if string[i]=='$':
initial_case=True
i=i+1
offset=offset+1
else:
initial_case=False
found=False
if string[i]=='a': # Abbreviated weekday name
field=dt.strftime('%a').lower()
found=True
if string[i]=='A': # Full weekday name
field=dt.strftime('%A').lower()
found=True
if (string[i]=='b') or (string[i]=='h'): # Abrev. month Name
field=dt.strftime('%b').lower()
found=True
if string[i]=='B': # Full month name
field=dt.strftime('%B').lower()
found=True
if string[i]=='C': # Century
field=dt.strftime('%C').lower()
found=True
if string[i]=='d': # Day (01 - 31)
field='%02d' % dt.day
found=True
if string[i]=='D': # Date (mm-dd-yy)
field=dt.strftime('%m-%d-%y')
found=True
if string[i]=='e': # Day, padded ( 1 - 31)
field='%2d' % dt.day
found=True
if string[i]=='E': # Day, unpadded (1 - 31)
field='%d' % dt.day
found=True
if string[i]=='F': # Date (yyyy-mm-dd)
field=dt.strftime('%F')
found=True
if string[i]=='g': # Two digit year number (as per ISO 8601)
field=dt.strftime('%g').lower()
found=True
if string[i]=='G': # Four digit year number (as per ISO 8601)
field=dt.strftime('%G').lower()
found=True
if string[i]=='H': # Hour, zero padded, 24 hour
field=dt.strftime('%H').lower()
found=True
if string[i]=='I': # Hour, zero padded, 12 hour
field=dt.strftime('%I').lower()
found=True
if string[i]=='i': # Hour, space padded, 12 hour
hour=dt.hour
if hour>12:
hour=hour-12
if hour==0:
hour=12
field='%2d' % hour
found=True
if string[i]=='J': # Hour, unpadded, 12 hour
hour=dt.hour
if hour>12:
hour=hour-12
if hour==0:
hour=12
field=str(hour)
found=True
if string[i]=='j': # Day of year
field=dt.strftime('%j')
found=True
if string[i]=='k': # Hour, space padded, 24 hour
field=dt.strftime('%k')
found=True
if string[i]=='M': # Minute, zero padded
field=dt.strftime('%M')
found=True
if string[i]=='m': # Month (01 - 12)
field=dt.strftime('%m')
found=True
if string[i]=='p': # AM/PM string
field=dt.strftime('%p')
found=True
if string[i]=='r': # Rivendell host name
field=self.hostName()
found=True
if string[i]=='R': # Rivendell short host name
field=self.shortHostName()
found=True
if string[i]=='S': # Second (SS)
field=dt.strftime('%S')
found=True
if string[i]=='s': # Rivendell service name
if self.hasService():
field=self.serviceName()
else:
field=''
found=True
if string[i]=='u': # Day of week (numeric, 1..7, 1=Monday)
field=dt.strftime('%u')
found=True
if (string[i]=='V') or (string[i]=='W'): # Week # (as per ISO 8601)
field=dt.strftime('%V')
found=True
if string[i]=='w': # Day of week (numeric, 0..6, 0=Sunday)
field=dt.strftime('%w')
found=True
if string[i]=='y': # Year (yy)
field=dt.strftime('%y')
found=True
if string[i]=='Y': # Year (yyyy)
field=dt.strftime('%Y')
found=True
if string[i]=='%':
field='%'
found=True
if not found: # No recognized wildcard, rollback!
i=-offset
field=string[i]
if upper_case:
field=field.upper();
if initial_case:
field=field[0].upper()+field[1::]
ret+=field
upper_case=False
initial_case=False
i=i+1
return ret
def shouldBeProcessed(self,section):
"""
Reads the Log Selection and SendNullUpdate parameters of the
config and returns a boolean to indicate whether or not this
update should be processed (boolean).
Takes one argument:
section - The '[<section>]' of the INI configuration from which
to take the parameters.
"""
result=True
if self.__config.has_section(section):
if self.__config.has_option(section,'ProcessNullUpdates'):
if self.__config.get(section,'ProcessNullUpdates')=='0':
result=result and True
if self.__config.get(section,'ProcessNullUpdates')=='1':
result=result and self.hasPadType(pypad.TYPE_NOW)
if self.__config.get(section,'ProcessNullUpdates')=='2':
result=result and self.hasPadType(pypad.TYPE_NEXT)
if self.__config.get(section,'ProcessNullUpdates')=='3':
result=result and self.hasPadType(pypad.TYPE_NOW) and self.hasPadType(pypad.TYPE_NEXT)
else:
result=result and True
log_dict={1: 'MasterLog',2: 'Aux1Log',3: 'Aux2Log',
101: 'VLog101',102: 'VLog102',103: 'VLog103',104: 'VLog104',
105: 'VLog105',106: 'VLog106',107: 'VLog107',108: 'VLog108',
109: 'VLog109',110: 'VLog110',111: 'VLog111',112: 'VLog112',
113: 'VLog113',114: 'VLog114',115: 'VLog115',116: 'VLog116',
117: 'VLog117',118: 'VLog118',119: 'VLog119',120: 'VLog120'}
option=log_dict[self.machine()]
if self.__config.has_option(section,option):
if self.__config.get(section,option).lower()=='yes':
result=result and True
else:
if self.__config.get(section,option).lower()=='no':
result=result and False
else:
if self.__config.get(section,option).lower()=='onair':
result=result and self.onairFlag()
else:
result=result and False
else:
result=result and False
else:
result=result and False
#print('machine(): '+str(self.machine()))
#print('result: '+str(result))
return result
def syslog(self,priority,msg):
"""
Send a message to the syslog.
"""
if((priority&248)==0):
priority=priority|(int(self.__rd_config.get('Identity','SyslogFacility',fallback=syslog.LOG_USER))<<3)
syslog.syslog(priority,msg)
class Receiver(object):
def __init__(self):
self.__pad_callback=None
self.__timer_callback=None
self.__timer_interval=None
self.__config_parser=None
def __pypad_Process(self,pad):
self.__pad_callback(pad)
def __pypad_TimerProcess(self,config):
self.__timer_callback(config)
def __getDbCredentials(self):
config=configparser.ConfigParser()
config.readfp(open('/etc/rd.conf'))
return (config.get('mySQL','Loginname'),config.get('mySQL','Password'),
config.get('mySQL','Hostname'),config.get('mySQL','Database'))
def __openDb(self):
creds=self.__getDbCredentials()
try:
return MySQLdb.connect(user=creds[0],passwd=creds[1],
host=creds[2],database=creds[3],
charset='utf8mb4')
except TypeError:
return MySQLdb.connect(user=creds[0],password=creds[1],
host=creds[2],database=creds[3],
charset='utf8mb4')
def setPadCallback(self,callback):
"""
Set the processing callback.
"""
self.__pad_callback=callback
def setTimerCallback(self,interval,callback):
"""
Set the timer callback.
Takes two arguments:
interval - The interval (in seconds) between callback invocations.
callback - The function to call when the timer interval expires. The
function should take one argument, which will be a
configparser object if setConfigFile() was called prior
to start(), otherwise None.
"""
self.__timer_interval=interval
self.__timer_callback=callback
def setConfigFile(self,filename):
"""
Set a file whence to get configuration information. If set,
the 'pypad.Update::config()' method will return a parserconfig
object created from the specified file. The file must be in INI
format.
A special case is if the supplied filename string begins with
the '$' character. If so, the remainder of the string is assumed
to be an unsigned integer ID that is used to retrieve the
configuration from the 'PYPAD_INSTANCES' table in the database
pointed to by '/etc/rd.conf'.
Returns a configparser object created from the specified
configuration.
"""
if filename[0]=='$': # Get the config from the DB
db=self.__openDb()
cursor=db.cursor()
cursor.execute('select CONFIG from PYPAD_INSTANCES where ID='+
filename[1::])
config=cursor.fetchone()
self.__config_parser=configparser.ConfigParser(interpolation=None)
self.__config_parser.read_string(config[0])
db.close()
else: # Get the config from a file
fp=open(filename)
self.__config_parser=configparser.ConfigParser(interpolation=None)
self.__config_parser.read_file(fp)
fp.close()
return self.__config_parser
def start(self,hostname,port):
"""
Connect to a Rivendell system and begin processing PAD events.
Once started, a pypad object can be interacted with
only within its callback method.
Takes the following arguments:
hostname - The hostname or IP address of the Rivendell system.
port - The TCP port to connect to. For most cases, just use
'pypad.PAD_TCP_PORT'.
"""
# So we exit cleanly when shutdown by rdpadengined(8)
signal.signal(signal.SIGTERM,SigHandler)
# Open rd.conf(5)
rd_config=configparser.ConfigParser(interpolation=None)
rd_config.readfp(open('/etc/rd.conf'))
# Open the syslog
pypad_name=sys.argv[0].split('/')[-1]
syslog.openlog(pypad_name,logoption=syslog.LOG_PID,facility=int(rd_config.get('Identity','SyslogFacility',fallback=syslog.LOG_USER)))
# Connect to the PAD feed
sock=socket.socket(socket.AF_INET)
conn=sock.connect((hostname,port))
timeout=None
if self.__timer_interval!=None:
timeout=self.__timer_interval
deadline=datetime.datetime.now()+datetime.timedelta(seconds=timeout)
sel=selectors.DefaultSelector()
sel.register(sock,selectors.EVENT_READ)
c=bytes()
line=bytes()
msg=""
while 1<2:
if len(sel.select(timeout))==0:
now=datetime.datetime.now()
if now>=deadline:
timeout=self.__timer_interval
deadline=now+datetime.timedelta(seconds=timeout)
self.__pypad_TimerProcess(self.__config_parser)
else:
timeout=(deadline-now).total_seconds()
else:
c=sock.recv(1)
line+=c
if c[0]==10:
linebytes=line.decode('utf-8','replace')
msg+=linebytes
if linebytes=='\r\n':
self.__pypad_Process(Update(json.loads(msg),self.__config_parser,rd_config))
msg=""
line=bytes()
if self.__timer_interval!=None:
timeout=(deadline-datetime.datetime.now()).total_seconds()
def SigHandler(signo,stack):
sys.exit(0)