# (c) 2012-2014, Michael DeHaan # # 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 . from __future__ import (absolute_import, division, print_function) __metaclass__ = type import os from ansible.module_utils._text import to_bytes 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.hashing import checksum, md5, secure_hash from ansible.utils.path import makedirs_safe REMOTE_CHECKSUM_ERRORS = { '0': "unable to calculate the checksum of the remote file", '1': "the remote file does not exist", '2': "no read permission on remote file", '3': "remote file is a directory, fetch cannot work on directories", '4': "python isn't present on the system. Unable to compute checksum", '5': "stdlib json was not found on the remote machine. Only the raw module can work without those installed", } 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) try: if self._play_context.check_mode: result['skipped'] = True result['msg'] = 'check mode not (yet) supported for this module' return result 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) # validate source and dest are strings FIXME: use basic.py and module specs source = self._task.args.get('src') if not isinstance(source, string_types): result['msg'] = "Invalid type supplied for source option, it must be a string" dest = self._task.args.get('dest') if not isinstance(dest, string_types): result['msg'] = "Invalid type supplied for dest option, it must be a string" if result.get('msg'): result['failed'] = True return result source = self._connection._shell.join_path(source) source = self._remote_expand_user(source) # calculate checksum for the remote file, don't bother if using # become as slurp will be used Force remote_checksum to follow # symlinks because fetch always follows symlinks remote_checksum = self._remote_checksum(source, all_vars=task_vars, follow=True) # 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 dest = os.path.expanduser(dest) if flat: if os.path.isdir(to_bytes(dest, errors='surrogate_or_strict')) and not dest.endswith(os.sep): result['msg'] = "dest is an existing directory, use a trailing slash if you want to fetch src into that directory" result['file'] = dest result['failed'] = True return result 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 = dest.replace("//", "/") if remote_checksum in REMOTE_CHECKSUM_ERRORS: result['changed'] = False result['file'] = source result['msg'] = REMOTE_CHECKSUM_ERRORS[remote_checksum] # 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 fail_on_missing: result['failed'] = True del result['changed'] else: result['msg'] += ", not transferring, ignored" return result # 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 self._connection.fetch_file(source, dest) 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