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# Copyright (C) 2016 Red Hat, Inc., Michal Srb <michal@redhat.com>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import hashlib
import json
import os
import re
import zipfile
from functools import partial
from sos.plugins import Plugin, RedHatPlugin
class Jars(Plugin, RedHatPlugin):
"""Collect information about available Java archives."""
plugin_name = "jars"
version = "1.0.0"
profiles = ("java",)
option_list = [
("append_locations", "colon-separated list of additional JAR paths",
"fast", "")
]
# There is no standard location for JAR files and scanning
# the whole filesystem could be very slow. Therefore we only
# scan directories in which JARs can be typically found.
jar_locations = (
"/usr/share/java", # common location for JARs
"/usr/lib/java", # common location for JARs containing native code
"/opt", # location for RHSCL and 3rd party software
"/usr/local", # used by sysadmins when installing SW locally
"/var/lib" # Java services commonly explode WARs there
)
def setup(self):
results = {"jars": []}
jar_paths = []
locations = list(Jars.jar_locations)
extra_locations = self.get_option("append_locations")
if extra_locations:
locations += extra_locations.split(":")
# find all JARs in given locations
for location in locations:
for dirpath, _, filenames in os.walk(location):
for filename in filenames:
path = os.path.join(dirpath, filename)
if Jars.is_jar(path):
jar_paths.append(path)
# try to extract information about found JARs
for jar_path in jar_paths:
maven_id = Jars.get_maven_id(jar_path)
jar_id = Jars.get_jar_id(jar_path)
if maven_id or jar_id:
record = {"path": jar_path,
"sha1": jar_id,
"maven_id": maven_id
}
results["jars"].append(record)
results_str = json.dumps(results, indent=4, separators=(",", ": "))
self.add_string_as_file(results_str, "jars.json")
@staticmethod
def is_jar(path):
"""Check whether given file is a JAR file.
JARs are ZIP files which usually include a manifest
at the canonical location 'META-INF/MANIFEST.MF'.
"""
if os.path.isfile(path) and zipfile.is_zipfile(path):
try:
with zipfile.ZipFile(path) as f:
if "META-INF/MANIFEST.MF" in f.namelist():
return True
except IOError:
pass
return False
@staticmethod
def get_maven_id(jar_path):
"""Extract Maven coordinates from a given JAR file, if possible.
JARs build by Maven (most popular Java build system) contain
'pom.properties' file. We can extract Maven coordinates
from there.
"""
props = {}
try:
with zipfile.ZipFile(jar_path) as f:
r = re.compile("META-INF/maven/[^/]+/[^/]+/pom.properties$")
result = [x for x in f.namelist() if r.match(x)]
if len(result) != 1:
return None
with f.open(result[0]) as props_f:
for line in props_f.readlines():
line = line.strip()
if not line.startswith(b"#"):
try:
(key, value) = line.split(b"=")
key = key.decode('utf8').strip()
value = value.decode('utf8').strip()
props[key] = value
except ValueError:
return None
except IOError:
pass
return props
@staticmethod
def get_jar_id(jar_path):
"""Compute JAR id.
Returns sha1 hash of a given JAR file.
"""
jar_id = ""
try:
with open(jar_path, mode="rb") as f:
m = hashlib.sha1()
for buf in iter(partial(f.read, 4096), b''):
m.update(buf)
jar_id = m.hexdigest()
except IOError:
pass
return jar_id
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