/
cm-client.py
executable file
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/
cm-client.py
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#!/usr/bin/env python3
"""
cache management command line client.
load balanced file caching on local harddisks
"""
import sys
import os
from cmlogging import *
from client import CmClient, ClientConfiguration
from filesystem import FileSystem
__version__ = "$Rev: 837 $"
__author__ = "rybach@cs.rwth-aachen.de (David Rybach)"
__copyright__ = "Copyright 2012, RWTH Aachen University"
def usage():
p = os.path.basename(sys.argv[0])
sys.stderr.write("usage: \n" +\
" get local copy:\n" +\
" %s [options] <filename>\n" % p +\
" copy local file to file server:\n" +\
" %s [options] -cp [-n|--noregister] [-m|--maxloc N] <source> <destination>\n" % p +\
" --noregister don't register local copy\n" +\
" --maxloc N only check N remote copies\n" +\
" retrieve locations of local copies:\n" +\
" %s [options] -l <filenames> \n" % p +\
" %s [options] -ll <location-limit-per-file> <filenames> \n" % p +\
" get destination for local copy (do not copy):\n" +\
" %s [options] -d <filename>\n" % p +\
" options:\n"+\
" --config <file> use alternative configuration\n" +\
" --debug enable debug output\n"+\
" --bundle treat file as bundle\n"+\
" --conjunct cache all files or none (for bundles)\n"+\
" --nobundle ignore special meaning of *.bundle files\n")
class Options:
def __init__(self, argv):
self.copy = False
self.register = True
self.locate = False
self.locateLimit = 9999
self.help = False
self.version = False
self.debug = False
self.config = ""
self.nobundle = False
self.bundle = False
self.conjunct = False
self.printDestination = False
self.arg = []
self.parseArguments(argv)
def parseArguments(self, argv):
n = len(argv)
i = 1
while i < n:
a = argv[i]
if a == "--":
try:
self.arg = argv[i+1:]
except Exception: pass
elif a == "--help" or a == "-h":
self.help = True
elif a == "--version" or a == "-V":
self.version = True
elif a == "--copy" or a == "-cp":
self.copy = True
elif a == "--noregister" or a == "-n":
self.register = False
elif a == "--locate" or a == "-l":
self.locate = True
elif a == "--locate-limit" or a == "-ll":
self.locate = True
try:
self.locateLimit = int(argv[i+1])
i += 1
except:
error("--locate-limit (-ll) expects an int")
return 1
elif a == "--maxloc" or a == "-m":
try:
self.locateLimit = int(argv[i+1])
i += 1
except:
error("--maxloc (-m) expects an int")
return 1
elif a == "--destination" or a == "-d":
self.printDestination = True
elif a == "--debug":
self.debug = True
elif a == "--nobundle":
self.nobundle = True
elif a == "--bundle":
self.bundle = True
elif a == "--conjunct":
self.conjunct = True
elif a == "--config":
try:
self.config = argv[i+1]
i += 1
except Exception as e:
warning("--config expects a file name" + str(e))
elif a.startswith("-"):
warning("unknown option: '%s'" % a)
else:
self.arg += [ a ]
i += 1
def main(argc, argv):
options = Options(argv)
if options.version:
sys.stderr.write("%s\n" % __version__)
return 1
if options.help or len(options.arg) < 1:
usage()
return 1
if options.debug:
LogLevel.enableDebug()
if options.copy:
if len(options.arg) < 2:
usage()
return 1
filename = options.arg[0]
config = ClientConfiguration(options.config)
if options.config:
if not config.read(options.config):
error("cannot read config file %s. using build-in defaults" % options.config)
else:
if not config.loadDefault():
error("cannot read default config file. using build-in defaults")
if options.nobundle:
config.IGNORE_BUNDLE = True
if options.printDestination:
print(CmClient.getDestination(FileSystem(config), os.path.realpath(filename)))
return 0
client = CmClient(config)
if not client.isConnected():
error("cannot connect to server")
else:
log("connected to %s" % str(client.connection.getPeerName()))
r = False
if options.copy:
r = client.copy(filename, options.arg[1], options.register, options.bundle)
elif options.locate:
locations = []
r = client.getLocations(options.arg, locations, options.bundle, options.locateLimit)
log("%d locations found" % len(locations))
for l in locations:
print("%s:%s:%s" % l)
else:
f, r = client.fetch(filename, options.bundle, options.conjunct, options.locateLimit)
print(f)
return not r
if __name__ == "__main__":
sys.exit( main(len(sys.argv), sys.argv) )