/
xmlrpcserver.py
executable file
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/
xmlrpcserver.py
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#!/usr/bin/env python2
#xmlrpcserver.py
#Original author: Possibly Scott Dougan ( orange@csh.rit.edu )
#Current maintainer: Josh McSavaney ( mcsaucy@csh.rit.edu )
#XML-RPC server to manage the state of the BetaBrite sign and ensure persistence
# across updates
import os
import sys
import SimpleXMLRPCServer
from twisted.web import server, xmlrpc
from BetaBrite import WRITE_MODES, startPacket, endPacket, setPriority, removePriority
from xml.dom import minidom
from sayxml import parsexml, handleFile
from time import sleep
import signal
def gracefullyDepart(SIG, FRM): #ensure graceful departure if this is killed by systemd
sys.exit(0)
signal.signal(signal.SIGHUP, gracefullyDepart)
NAMESPACE = 'http://infosys.csh.rit.edu/'
CURR_XML_LOC = '/tmp'
PORT=8080
FILE = CURR_XML_LOC + "/infosys_current.xml"
#FILE = "%s/infosys_current.xml" % os.path.expanduser('~')
def getDom():
dom = minidom.parse(FILE)
dom.normalize()
return dom
def saveDom(dom):
file = open(FILE, 'w')
file.write(dom.toxml())
file.close()
class Methods:
def addFile(self, filelabel):
if int(filelabel) < 0 or int(filelabel) > 95:
return "BAD_FILELABEL"
dom = getDom()
lilinfosys = dom.documentElement
files = lilinfosys.getElementsByTagName('file')
# verify the file does not exist
for file in files:
if int(file.getAttribute('label')) == int(filelabel):
return "FILE_EXISTS"
# done with assertions now add the file
file_element = dom.createElement('file')
file_label = file_element.setAttribute('label', str(filelabel))
lilinfosys.appendChild(file_element)
saveDom(dom)
return 'ok'
def addText(self, filelabel, effect, text, embed = "0"):
if int(filelabel) <= 0 or int(filelabel) > 95:
return "BAD_FILELABEL"
if not WRITE_MODES.has_key(effect.upper()):
return "BAD_EFFECT"
dom = getDom()
lilinfosys = dom.documentElement
files = lilinfosys.getElementsByTagName('file')
found = False
for file in files:
if int(file.getAttribute('label')) == int(filelabel):
assert not found
found = True
text_element = dom.createElement('text')
text_effect = text_element.setAttribute('effect', effect.upper())
embed = int(embed)
if embed <= 94 and embed > 0 and embed != 63:
text_embed = text_element.setAttribute('embed', str(embed))
text_text = dom.createTextNode(text)
text_element.appendChild(text_text)
file.appendChild(text_element)
if not found:
return "FILE_DOES_NOT_EXIST"
saveDom(dom)
return 'ok'
def addString(self, filelabel, string):
if int(filelabel) <= 0 or int(filelabel) > 95 or int(filelabel) == 63:
return "BAD_FILELABEL"
dom = getDom()
lilinfosys = dom.documentElement
files = lilinfosys.getElementsByTagName('file')
found = False
foundFile = None
flash = False #do we need to flash a memory config (and thus the display) for this?
for file in files:
if int(file.getAttribute('label')) == int(filelabel):
assert not found
found = True
foundFile = file
if not found:
return "FILE_DOES_NOT_EXIST"
if len(string) > 120: #play it safe, I guess
string = string[:120]
print "** WARNING ** truncating string to 120 characters"
if foundFile.getElementsByTagName('text').length != 0:
print "CANNOT HAVE STRING AND TEXT IN SAME FILE"
return "CANNOT_HAVE_STRING_AND_TEXT_IN_SAME_FILE"
#Yo, you can't have a string and text item together.
strings = foundFile.getElementsByTagName(u'string')
if strings.length != 1 or not strings.item(0).hasAttribute(u'size') and strings.item(0).getAttribute(u'size') < len(string):
print "Well, this won't be as seemless as we would've liked..."
flash = True
file_element = dom.createElement('file')
file_label = file_element.setAttribute('label', str(filelabel))
string_element = dom.createElement('string')
string_size = string_element.setAttribute('size', str(len(string)))
string_element.appendChild( dom.createTextNode( string ) )
file_element.appendChild(string_element)
lilinfosys.replaceChild(file_element, foundFile) #we'll just perform a switcheroo here...
#and NOW we should actually process that update...
saveDom(dom)
if flash:
dom = getDom()
parsexml(dom.toxml())
else:
startPacket()
handleFile(file_element)
endPacket()
return 'ok'
def delFile(self, filelabel):
if int(filelabel) <= 0 or int(filelabel) > 95:
return "BAD_FILELABEL"
dom = getDom()
lilinfosys = dom.documentElement
files = lilinfosys.getElementsByTagName('file')
# not caring if it finds more than one...
# that should never happen (tm)
# or doesn't find one
for file in files:
if file.getAttribute('label') == str(filelabel):
lilinfosys.removeChild(file)
saveDom(dom)
return 'ok'
def fileListing(self):
list = [];
dom = getDom()
lilinfosys = dom.documentElement
files = lilinfosys.getElementsByTagName('file')
for file in files:
list.append(int(file.getAttribute('label')))
return list
def fileExists(self, filelabel):
if int(filelabel) < 0 or int(filelabel) > 95:
return "BAD_FILELABEL"
dom = getDom()
lilinfosys = dom.documentElement
files = lilinfosys.getElementsByTagName('file')
for file in files:
if int(file.getAttribute('label')) == int(filelabel):
return True
return False
def fileContent(self, filelabel):
if int(filelabel) <= 0 or int(filelabel) > 95:
return "BAD_FILELABEL"
list = []
dom = getDom()
lilinfosys = dom.documentElement
files = lilinfosys.getElementsByTagName('file')
for file in files:
if int(file.getAttribute('label')) == int(filelabel):
return file.toxml()
return "FILE_NOT_FOUND"
def updateSign(self):
dom = getDom()
parsexml(dom.toxml())
return 'ok'
def clearAll(self):
dom = minidom.Document()
infosys = dom.createElement('lilinfosys')
dom.appendChild(infosys)
saveDom(dom)
return 'ok'
class InfosysXmlRpc(xmlrpc.XMLRPC):
def xmlrpc_clearAll(self):
return Methods.clearAll()
if __name__ == "__main__":
from twisted.internet import reactor
import xml.dom.minidom
print "xmlrpcserver starting"
if not os.path.exists( FILE ):
print "Creating file " + FILE
file = open (FILE, 'w')
dom = xml.dom.minidom.Document()
infosys_element = dom.createElementNS('http://infosys.csh.rit.edu/', 'lilinfosys')
dom.appendChild(infosys_element)
file.write(dom.toxml())
file.close()
methods_object = Methods()
server = SimpleXMLRPCServer.SimpleXMLRPCServer(("0.0.0.0", PORT))
server.register_instance(methods_object)
server.serve_forever()