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executable file 46 lines (38 sloc) 1.347 kb
#!/usr/bin/env python
import cgitb
cgitb.enable()
import os
import sys
import cgi
from nagcat.graph import Graph
def argv_to_cgi(argv, cgi_store):
key=None
for arg in argv:
if arg.startswith("--"):
if key:
cgi_store.list.append(cgi.MiniFieldStorage(key, True))
key = arg.replace("--", "", 1)
else:
if key:
cgi_store.list.append(cgi.MiniFieldStorage(key, arg))
key = None
def pull_cgi_data(cgi_store):
"""Pull data from CGI variables, validating the inputs."""
assert 'host' in cgi_store, "Host parameter not found"
assert 'rrd' in cgi_store, "RRD parameter not found"
host = cgi_store.getfirst('host').translate(None, "/.")
rrd = cgi_store.getfirst('rrd').translate(None, "/.")
if 'period' in cgi_store:
period = cgi_store.getfirst('period')
else:
period = "day"
return (host, rrd, period)
### Execution
if __name__ == "__main__":
cgi_store = cgi.FieldStorage()
argv_to_cgi(sys.argv, cgi_store)
(host, rrd, period) = pull_cgi_data(cgi_store)
path = os.environ.get('NAGCAT_RRA_DIR', None)
assert os.path.isdir(path), "Invalid NAGCAT_RRA_DIR %s" % path
graph = Graph(path, host, rrd, period)
sys.stdout.write("Content-Type: image/png\r\n\r\n%s" % graph.graph())
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