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# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com> # # This file is part of Ansible # # Ansible 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 3 of the License, or # (at your option) any later version. # # Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>. from __future__ import (absolute_import, division, print_function) __metaclass__ = type import os import base64 from ansible.errors import AnsibleError, AnsibleActionFail, AnsibleActionSkip from ansible.module_utils.common.text.converters import to_bytes, to_text from ansible.module_utils.six import string_types from ansible.module_utils.parsing.convert_bool import boolean from ansible.plugins.action import ActionBase from ansible.utils.display import Display from ansible.utils.hashing import checksum, checksum_s, md5, secure_hash from ansible.utils.path import makedirs_safe, is_subpath display = Display() class ActionModule(ActionBase): def run(self, tmp=None, task_vars=None): ''' handler for fetch operations ''' if task_vars is None: task_vars = dict() result = super(ActionModule, self).run(tmp, task_vars) del tmp # tmp no longer has any effect try: if self._play_context.check_mode: raise AnsibleActionSkip('check mode not (yet) supported for this module') source = self._task.args.get('src', None) original_dest = dest = self._task.args.get('dest', None) flat = boolean(self._task.args.get('flat'), strict=False) fail_on_missing = boolean(self._task.args.get('fail_on_missing', True), strict=False) validate_checksum = boolean(self._task.args.get('validate_checksum', True), strict=False) msg = '' # validate source and dest are strings FIXME: use basic.py and module specs if not isinstance(source, string_types): msg = "Invalid type supplied for source option, it must be a string" if not isinstance(dest, string_types): msg = "Invalid type supplied for dest option, it must be a string" if source is None or dest is None: msg = "src and dest are required" if msg: raise AnsibleActionFail(msg) source = self._connection._shell.join_path(source) source = self._remote_expand_user(source) remote_stat = {} remote_checksum = None if not self._connection.become: # Get checksum for the remote file. Don't bother if using become as slurp will be used. # Follow symlinks because fetch always follows symlinks try: remote_stat = self._execute_remote_stat(source, all_vars=task_vars, follow=True) except AnsibleError as ae: result['changed'] = False result['file'] = source if fail_on_missing: result['failed'] = True result['msg'] = to_text(ae) else: result['msg'] = "%s, ignored" % to_text(ae, errors='surrogate_or_replace') return result remote_checksum = remote_stat.get('checksum') if remote_stat.get('exists'): if remote_stat.get('isdir'): result['failed'] = True result['changed'] = False result['msg'] = "remote file is a directory, fetch cannot work on directories" # Historically, these don't fail because you may want to transfer # a log file that possibly MAY exist but keep going to fetch other # log files. Today, this is better achieved by adding # ignore_errors or failed_when to the task. Control the behaviour # via fail_when_missing if not fail_on_missing: result['msg'] += ", not transferring, ignored" del result['changed'] del result['failed'] return result # use slurp if permissions are lacking or privilege escalation is needed remote_data = None if remote_checksum in (None, '1', ''): slurpres = self._execute_module(module_name='ansible.legacy.slurp', module_args=dict(src=source), task_vars=task_vars) if slurpres.get('failed'): if not fail_on_missing: result['file'] = source result['changed'] = False else: result.update(slurpres) if 'not found' in slurpres.get('msg', ''): result['msg'] = "the remote file does not exist, not transferring, ignored" elif slurpres.get('msg', '').startswith('source is a directory'): result['msg'] = "remote file is a directory, fetch cannot work on directories" return result else: if slurpres['encoding'] == 'base64': remote_data = base64.b64decode(slurpres['content']) if remote_data is not None: remote_checksum = checksum_s(remote_data) # calculate the destination name if os.path.sep not in self._connection._shell.join_path('a', ''): source = self._connection._shell._unquote(source) source_local = source.replace('\\', '/') else: source_local = source # ensure we only use file name, avoid relative paths if not is_subpath(dest, original_dest): # TODO: ? dest = os.path.expanduser(dest.replace(('../',''))) raise AnsibleActionFail("Detected directory traversal, expected to be contained in '%s' but got '%s'" % (original_dest, dest)) if flat: if os.path.isdir(to_bytes(dest, errors='surrogate_or_strict')) and not dest.endswith(os.sep): raise AnsibleActionFail("dest is an existing directory, use a trailing slash if you want to fetch src into that directory") if dest.endswith(os.sep): # if the path ends with "/", we'll use the source filename as the # destination filename base = os.path.basename(source_local) dest = os.path.join(dest, base) if not dest.startswith("/"): # if dest does not start with "/", we'll assume a relative path dest = self._loader.path_dwim(dest) else: # files are saved in dest dir, with a subdir for each host, then the filename if 'inventory_hostname' in task_vars: target_name = task_vars['inventory_hostname'] else: target_name = self._play_context.remote_addr dest = "%s/%s/%s" % (self._loader.path_dwim(dest), target_name, source_local) dest = os.path.normpath(dest) # calculate checksum for the local file local_checksum = checksum(dest) if remote_checksum != local_checksum: # create the containing directories, if needed makedirs_safe(os.path.dirname(dest)) # fetch the file and check for changes if remote_data is None: self._connection.fetch_file(source, dest) else: try: f = open(to_bytes(dest, errors='surrogate_or_strict'), 'wb') f.write(remote_data) f.close() except (IOError, OSError) as e: raise AnsibleActionFail("Failed to fetch the file: %s" % e) new_checksum = secure_hash(dest) # For backwards compatibility. We'll return None on FIPS enabled systems try: new_md5 = md5(dest) except ValueError: new_md5 = None if validate_checksum and new_checksum != remote_checksum: result.update(dict(failed=True, md5sum=new_md5, msg="checksum mismatch", file=source, dest=dest, remote_md5sum=None, checksum=new_checksum, remote_checksum=remote_checksum)) else: result.update({'changed': True, 'md5sum': new_md5, 'dest': dest, 'remote_md5sum': None, 'checksum': new_checksum, 'remote_checksum': remote_checksum}) else: # For backwards compatibility. We'll return None on FIPS enabled systems try: local_md5 = md5(dest) except ValueError: local_md5 = None result.update(dict(changed=False, md5sum=local_md5, file=source, dest=dest, checksum=local_checksum)) finally: self._remove_tmp_path(self._connection._shell.tmpdir) return result