-#!/usr/bin/python
-
-import sys
+import sys, os.path
+import pickle
+import time
import socket
import traceback
from urlparse import urlparse
-import pygraphviz
+try:
+ import pygraphviz
+except:
+ print 'Warning, could not import pygraphviz, test mode only'
from optparse import OptionParser
from sfa.client.sfi import Sfi
-from sfa.util.sfalogging import sfa_logger,sfa_logger_goes_to_console
-import sfa.util.xmlrpcprotocol as xmlrpcprotocol
+from sfa.util.sfalogging import logger, DEBUG
+from sfa.client.sfaserverproxy import SfaServerProxy
def url_hostname_port (url):
if url.find("://")<0:
else:
return (url,parts[0],parts[1])
+### a very simple cache mechanism so that successive runs (see make)
+### will go *much* faster
+### assuming everything is sequential, as simple as it gets
+### { url -> (timestamp,version)}
+class VersionCache:
+ def __init__ (self, filename=None, expires=60*60):
+ # default is to store cache in the same dir as argv[0]
+ if filename is None:
+ filename=os.path.join(os.path.dirname(sys.argv[0]),"sfascan-version-cache.pickle")
+ self.filename=filename
+ self.expires=expires
+ self.url2version={}
+ self.load()
+
+ def load (self):
+ try:
+ infile=file(self.filename,'r')
+ self.url2version=pickle.load(infile)
+ infile.close()
+ except:
+ logger.debug("Cannot load version cache, restarting from scratch")
+ self.url2version = {}
+ logger.debug("loaded version cache with %d entries %s"%(len(self.url2version),self.url2version.keys()))
+
+ def save (self):
+ try:
+ outfile=file(self.filename,'w')
+ pickle.dump(self.url2version,outfile)
+ outfile.close()
+ except:
+ logger.log_exc ("Cannot save version cache into %s"%self.filename)
+ def clean (self):
+ try:
+ retcod=os.unlink(self.filename)
+ logger.info("Cleaned up version cache %s, retcod=%d"%(self.filename,retcod))
+ except:
+ logger.info ("Could not unlink version cache %s"%self.filename)
+
+ def show (self):
+ entries=len(self.url2version)
+ print "version cache from file %s has %d entries"%(self.filename,entries)
+ key_values=self.url2version.items()
+ def old_first (kv1,kv2): return int(kv1[1][0]-kv2[1][0])
+ key_values.sort(old_first)
+ for key_value in key_values:
+ (url,tuple) = key_value
+ (timestamp,version) = tuple
+ how_old = time.time()-timestamp
+ if how_old<=self.expires:
+ print url,"-- %d seconds ago"%how_old
+ else:
+ print "OUTDATED",url,"(%d seconds ago, expires=%d)"%(how_old,self.expires)
+
+ # turns out we might have trailing slashes or not
+ def normalize (self, url):
+ return url.strip("/")
+
+ def set (self,url,version):
+ url=self.normalize(url)
+ self.url2version[url]=( time.time(), version)
+ def get (self,url):
+ url=self.normalize(url)
+ try:
+ (timestamp,version)=self.url2version[url]
+ how_old = time.time()-timestamp
+ if how_old<=self.expires: return version
+ else: return None
+ except:
+ return None
+
###
class Interface:
- def __init__ (self,url):
+ def __init__ (self,url,verbose=False):
self._url=url
+ self.verbose=verbose
try:
(self._url,self.hostname,self.port)=url_hostname_port(url)
self.ip=socket.gethostbyname(self.hostname)
self.probed=False
except:
-# traceback.print_exc()
self.hostname="unknown"
self.ip='0.0.0.0'
self.port="???"
# connect to server and trigger GetVersion
def get_version(self):
+ ### if we already know the answer:
if self.probed:
return self._version
+ ### otherwise let's look in the cache file
+ logger.debug("searching in version cache %s"%self.url())
+ cached_version = VersionCache().get(self.url())
+ if cached_version is not None:
+ logger.info("Retrieved version info from cache")
+ return cached_version
+ ### otherwise let's do the hard work
# dummy to meet Sfi's expectations for its 'options' field
class DummyOptions:
pass
options=DummyOptions()
- options.verbose=False
+ options.verbose=self.verbose
+ options.timeout=10
try:
client=Sfi(options)
client.read_config()
key_file = client.get_key_file()
cert_file = client.get_cert_file(key_file)
+ logger.debug("using key %s & cert %s"%(key_file,cert_file))
url=self.url()
- sfa_logger().info('issuing get version at %s'%url)
- server=xmlrpcprotocol.get_server(url, key_file, cert_file, options)
+ logger.info('issuing GetVersion at %s'%url)
+ # setting timeout here seems to get the call to fail - even though the response time is fast
+ #server=SfaServerProxy(url, key_file, cert_file, verbose=self.verbose, timeout=options.timeout)
+ server=SfaServerProxy(url, key_file, cert_file, verbose=self.verbose)
self._version=server.GetVersion()
except:
-# traceback.print_exc()
+ logger.log_exc("failed to get version")
self._version={}
+ # so that next run from this process will find out
self.probed=True
+ # store in version cache so next processes will remember for an hour
+ cache=VersionCache()
+ cache.set(self.url(),self._version)
+ cache.save()
+ logger.debug("Saved version for url=%s in version cache"%self.url())
+ # that's our result
return self._version
@staticmethod
result='<<TABLE BORDER="0" CELLBORDER="0"><TR><TD>' + \
'</TD></TR><TR><TD>'.join(lines) + \
'</TD></TR></TABLE>>'
-# print 'multilines=',result
return result
# default is for when we can't determine the type of the service
layout['fillcolor']='gray'
return layout
-class SfaScan:
+class Scanner:
# provide the entry points (a list of interfaces)
def __init__ (self, left_to_right=False, verbose=False):
while to_scan:
for interface in to_scan:
# performing xmlrpc call
+ logger.info("retrieving/fetching version at interface %s"%interface.url())
version=interface.get_version()
- if self.verbose:
- sfa_logger().info("GetVersion at interface %s"%interface.url())
- if not version:
- sfa_logger().info("<EMPTY GetVersion(); offline or cannot authenticate>")
- else:
- for (k,v) in version.iteritems():
- if not isinstance(v,dict):
- sfa_logger().info("\r\t%s:%s"%(k,v))
- else:
- sfa_logger().info(k)
- for (k1,v1) in v.iteritems():
- sfa_logger().info("\r\t\t%s:%s"%(k1,v1))
+ if not version:
+ logger.info("<EMPTY GetVersion(); offline or cannot authenticate>")
+ else:
+ for (k,v) in version.iteritems():
+ if not isinstance(v,dict):
+ logger.debug("\r\t%s:%s"%(k,v))
+ else:
+ logger.debug(k)
+ for (k1,v1) in v.iteritems():
+ logger.debug("\r\t\t%s:%s"%(k1,v1))
# 'geni_api' is expected if the call succeeded at all
# 'peers' is needed as well as AMs typically don't have peers
if 'geni_api' in version and 'peers' in version:
# proceed with neighbours
- for (next_name,next_url) in version['peers'].items():
+ for (next_name,next_url) in version['peers'].iteritems():
next_interface=Interface(next_url)
# locate or create node in graph
try:
for node in graph.nodes():
interface=node2interface.get(node,None)
if interface:
- for (k,v) in interface.get_layout().items():
+ for (k,v) in interface.get_layout().iteritems():
node.attr[k]=v
else:
- sfa_logger().error("MISSED interface with node %s"%node)
+ logger.error("MISSED interface with node %s"%node)
-default_outfiles=['sfa.png','sfa.svg','sfa.dot']
-
-def main():
- sfa_logger_goes_to_console()
- usage="%prog [options] url-entry-point(s)"
- parser=OptionParser(usage=usage)
- parser.add_option("-o","--output",action='append',dest='outfiles',default=[],
- help="output filenames (cumulative) - defaults are %r"%default_outfiles)
- parser.add_option("-l","--left-to-right",action="store_true",dest="left_to_right",default=False,
- help="instead of top-to-bottom")
- parser.add_option("-v","--verbose",action='store_true',dest='verbose',default=False,
- help="verbose")
- (options,args)=parser.parse_args()
- if not args:
- parser.print_help()
- sys.exit(1)
- if not options.outfiles:
- options.outfiles=default_outfiles
- scanner=SfaScan(left_to_right=options.left_to_right, verbose=options.verbose)
- entries = [ Interface(entry) for entry in args ]
- g=scanner.graph(entries)
- sfa_logger().info("creating layout")
- g.layout(prog='dot')
- for outfile in options.outfiles:
- sfa_logger().info("drawing in %s"%outfile)
- g.draw(outfile)
- sfa_logger().info("done")
-
-if __name__ == '__main__':
- main()
+class SfaScan:
+
+ default_outfiles=['sfa.png','sfa.svg','sfa.dot']
+
+ def main(self):
+ usage="%prog [options] url-entry-point(s)"
+ parser=OptionParser(usage=usage)
+ parser.add_option("-d", "--dir", dest="sfi_dir",
+ help="config & working directory - default is " + Sfi.default_sfi_dir(),
+ metavar="PATH", default=Sfi.default_sfi_dir())
+ parser.add_option("-o","--output",action='append',dest='outfiles',default=[],
+ help="output filenames (cumulative) - defaults are %r"%SfaScan.default_outfiles)
+ parser.add_option("-l","--left-to-right",action="store_true",dest="left_to_right",default=False,
+ help="instead of top-to-bottom")
+ parser.add_option("-v", "--verbose", action="count", dest="verbose", default=0,
+ help="verbose - can be repeated for more verbosity")
+ parser.add_option("-c", "--clean-cache",action='store_true',
+ dest='clean_cache',default=False,
+ help='clean/trash version cache and exit')
+ parser.add_option("-s","--show-cache",action='store_true',
+ dest='show_cache',default=False,
+ help='show/display version cache')
+
+ (options,args)=parser.parse_args()
+ logger.enable_console()
+ # apply current verbosity to logger
+ logger.setLevelFromOptVerbose(options.verbose)
+ # figure if we need to be verbose for these local classes that only have a bool flag
+ bool_verbose=logger.getBoolVerboseFromOpt(options.verbose)
+
+ if options.show_cache:
+ VersionCache().show()
+ sys.exit(0)
+ if options.clean_cache:
+ VersionCache().clean()
+ sys.exit(0)
+ if not args:
+ parser.print_help()
+ sys.exit(1)
+
+ if not options.outfiles:
+ options.outfiles=SfaScan.default_outfiles
+ scanner=Scanner(left_to_right=options.left_to_right, verbose=bool_verbose)
+ entries = [ Interface(entry) for entry in args ]
+ try:
+ g=scanner.graph(entries)
+ logger.info("creating layout")
+ g.layout(prog='dot')
+ for outfile in options.outfiles:
+ logger.info("drawing in %s"%outfile)
+ g.draw(outfile)
+ logger.info("done")
+ # test mode when pygraphviz is not available
+ except:
+ entry=entries[0]
+ print "GetVersion at %s returned %s"%(entry.url(),entry.get_version())
+
git://git.onelab.eu / sfa.git / blobdiff