def doActions( self, actions, inEvent ):
self._log.debug("doActions %s", actions)
if actions :
self._log.debug("doActions %s", actions)
for action in actions:
try:
cmd = action["cmd"]
adrs = action["address"]
uri = action["uri"]
# has uri got any % symbols in it, attempt substitution
if inEvent.getPayload() and '%' in uri:
# the uri can contain string substitutions of the form %(key)s where
# the key is a key into other_data, the s is the string specifier.
# See String Formatting Operations in the python library ref.
uri = uri % inEvent.getPayload()
self._log.info("url address : %s command: %s uri: %s" % (adrs, cmd, uri) )
if ( cmd == "GET" ):
# TODO rate limit requests to a webbrick at one time
url = str("http://%s%s" % (adrs,uri))
# list operations are thread safe
http_sin.addQueueEntry( adrs, action, url )
else:
# TODO shift to twisted for POST
resp = DoHTTPRequest(adrs, cmd, uri)
if resp and (resp.status != 200) and resp.read():
self._log.error("HTTP error %i : %s in targetUrl" % (resp.status,resp.reason) )
except Exception, ex:
self._log.exception( ex )
def doActions( self, actions, inEvent ):
self._log.debug("doActions %s", actions)
if actions :
self._log.debug("doActions %s", actions)
for action in actions:
try:
cmd = action["cmd"]
adrs = action["address"]
uri = action["uri"]
# has uri got any % symbols in it, attempt substitution
if inEvent.getPayload() and '%' in uri:
# the uri can contain string substitutions of the form %(key)s where
# the key is a key into other_data, the s is the string specifier.
# See String Formatting Operations in the python library ref.
uri = uri % inEvent.getPayload()
if inEvent.getPayload() and '%' in adrs:
# the address can contain string substitutions of the form %(key)s where
# the key is a key into other_data, the s is the string specifier.
# See String Formatting Operations in the python library ref.
adrs = adrs % inEvent.getPayload()
self._log.info("url address : %s command: %s uri: %s" % (adrs, cmd, uri) )
if ( cmd == "GET" ):
# TODO rate limit requests to a webbrick at one time
url = str("http://%s%s" % (adrs,uri))
# list operations are thread safe
self.addQueueEntry( adrs, (action,url) )
# we need to handle this on the reactor thread as it will
# make network calls twisted is not thread safe!
# defer import to here so we can install alternate reactors.
from twisted.internet import reactor
reactor.callFromThread( self.actionStart, adrs )
else:
# TODO shift to twisted for POST
resp = DoHTTPRequest(adrs, cmd, uri)
if resp and (resp.status != 200) and resp.read():
self._log.error("HTTP error %i : %s in targetUrl" % (resp.status,resp.reason) )
except Exception, ex:
self._log.exception( ex )
def default(self, *args):
# and request parameters as well.
self._log.debug( 'WebBrickProxy args (%i) Uri %s' % (len(args), args ) )
if len(args) == 0:
## no webbrick to handle.
pass
elif len(args) == 1:
# no local part, redirect to index page
raise cherrypy.HTTPRedirect( "%s/index.htm" % args[0] )
else:
wbaddr = args[0] # Ip or DNS address
reqUri = string.join( args[1:], '/' )
# TODO should we use twisted or this is already worker thread so no issue
self._log.debug( 'WebBrickProxy Address %s Uri %s' % (wbaddr, reqUri) )
if not self._webbrickVers.has_key(wbaddr):
# retrieve interface version string.
r = DoHTTPRequest(wbaddr, "GET", "/ver")
if r and (r.status == 200):
self._webbrickVers[wbaddr] = r.read().strip()
else:
self._webbrickVers[wbaddr] = 'default'
# is wbUri in local directory?
# first look in default webbrick group.
# TODO allow configuring webbrick UI by address/name
# TODO list files that must be proxied to webbrick, i.e. .spi files
localdir = os.path.join( self.proxyDir, self._webbrickVers[wbaddr] )
if not os.path.exists( localdir ):
os.makedirs(localdir)
localpath = os.path.join( localdir, reqUri )
if os.path.exists( localpath ):
# yes then return.
return cherrypy.lib.cptools.serveFile(localpath)
else:
# do not cache stuff from webbricks.
cherrypy.response.headerMap["cache-control"] = "no-cache"
# retrieve from remote webbrick and serve
wbUri = '/' + reqUri + '?' + cherrypy.request.query_string
self._log.debug( 'WebBrickProxy Retrieve %s Uri %s' % (wbaddr, wbUri) )
r = DoHTTPRequest(wbaddr, "GET", wbUri)
if r:
if (r.status == 200):
txt = r.read()
self._log.debug( 'WebBrickProxy %s return (%s)' % (wbaddr, txt) )
# if extension is not .inc, .xml then cache locally.
if not localpath.endswith('.inc') and not localpath.endswith('.xml'):
f = open(localpath,"wb")
f.write(txt)
f.close()
return txt
elif (r.status == 302):
# redirect by webbrick
self._log.debug("HTTP redirect %s" % ( r.getheaders() ) )
raise cherrypy.HTTPRedirect( r.getheader('Location') )
else:
self._log.debug("HTTP error %i : %s %s " % ( r.status,r.reason,r.getheaders() ) )
# TODO error handling
# TODO error
return {}
