3b7feb8980
There is no need to require thirsty mode when the destination is a directory. We add the basename of the url to the destination directory and proceed with that. If that file exists in non-thirsty mode continue as expected. I also cleaned up some of the logic that is no longer necessary if we simply rewrite the destination from the very start the way it is expected.
240 lines
7.7 KiB
Python
Executable file
240 lines
7.7 KiB
Python
Executable file
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2012, Jan-Piet Mens <jpmens () gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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# see examples/playbooks/get_url.yml
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import shutil
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import datetime
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import tempfile
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DOCUMENTATION = '''
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---
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module: get_url
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short_description: Downloads files from HTTP, HTTPS, or FTP to node
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description:
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- Downloads files from HTTP, HTTPS, or FTP to the remote server. The remote
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server must have direct access to the remote resource.
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version_added: "0.6"
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options:
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url:
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description:
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- HTTP, HTTPS, or FTP URL
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required: true
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default: null
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aliases: []
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dest:
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description:
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- absolute path of where to download the file to.
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- If I(dest) is a directory, the basename of the file on the remote server will be used. If a directory, I(thirsty=yes) must also be set.
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required: true
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default: null
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thirsty:
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description:
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- if C(yes), will download the file every time and replace the
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file if the contents change. if C(no), the file will only be downloaded if
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the destination does not exist. Generally should be C(yes) only for small
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local files. prior to 0.6, acts if C(yes) by default.
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version_added: "0.7"
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required: false
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choices: [ "yes", "no" ]
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default: "no"
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others:
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description:
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- all arguments accepted by the M(file) module also work here
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required: false
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examples:
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- code: "get_url: url=http://example.com/path/file.conf dest=/etc/foo.conf mode=0440"
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description: "Example from Ansible Playbooks"
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notes:
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- This module doesn't yet support configuration for proxies or passwords.
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# informational: requirements for nodes
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requirements: [ urllib2, urlparse ]
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author: Jan-Piet Mens
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'''
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HAS_URLLIB2=True
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try:
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import urllib2
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except ImportError:
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HAS_URLLIB2=False
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HAS_URLPARSE=True
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try:
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import urlparse
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import socket
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except ImportError:
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HAS_URLPARSE=False
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# ==============================================================
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# url handling
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def url_filename(url):
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fn = os.path.basename(urlparse.urlsplit(url)[2])
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if fn == '':
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return 'index.html'
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return fn
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def url_do_get(module, url, dest):
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"""
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Get url and return request and info
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Credits: http://stackoverflow.com/questions/7006574/how-to-download-file-from-ftp
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"""
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USERAGENT = 'ansible-httpget'
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info = dict(url=url, dest=dest)
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r = None
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request = urllib2.Request(url)
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request.add_header('User-agent', USERAGENT)
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if os.path.exists(dest):
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t = datetime.datetime.utcfromtimestamp(os.path.getmtime(dest))
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tstamp = t.strftime('%a, %d %b %Y %H:%M:%S +0000')
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request.add_header('If-Modified-Since', tstamp)
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try:
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r = urllib2.urlopen(request)
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info.update(r.info())
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info.update(dict(msg="OK (%s bytes)" % r.headers.get('Content-Length', 'unknown'), status=200))
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except urllib2.HTTPError, e:
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# Must not fail_json() here so caller can handle HTTP 304 unmodified
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info.update(dict(msg=str(e), status=e.code))
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return r, info
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except urllib2.URLError, e:
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code = getattr(e, 'code', -1)
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module.fail_json(msg="Request failed: %s" % str(e), status_code=code)
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return r, info
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def url_get(module, url, dest):
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"""
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Download url and store at dest.
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If dest is a directory, determine filename from url.
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Return (tempfile, info about the request)
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"""
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req, info = url_do_get(module, url, dest)
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# TODO: should really handle 304, but how? src file could exist (and be newer) but empty
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if info['status'] == 304:
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module.exit_json(url=url, dest=dest, changed=False, msg=info.get('msg', ''))
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# create a temporary file and copy content to do md5-based replacement
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if info['status'] != 200:
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module.fail_json(msg="Request failed", status_code=info['status'], response=info['msg'], url=url, dest=dest)
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fd, tempname = tempfile.mkstemp()
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f = os.fdopen(fd, 'wb')
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try:
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shutil.copyfileobj(req, f)
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except Exception, err:
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os.remove(tempname)
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module.fail_json(msg="failed to create temporary content file: %s" % str(err))
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f.close()
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req.close()
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return tempname, info
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# ==============================================================
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# main
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def main():
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# does this really happen on non-ancient python?
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if not HAS_URLLIB2:
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module.fail_json(msg="urllib2 is not installed")
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if not HAS_URLPARSE:
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module.fail_json(msg="urlparse is not installed")
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module = AnsibleModule(
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# not checking because of daisy chain to file module
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argument_spec = dict(
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url = dict(required=True),
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dest = dict(required=True),
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thirsty = dict(default='no', choices=BOOLEANS)
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),
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add_file_common_args=True
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)
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url = module.params['url']
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dest = os.path.expanduser(module.params['dest'])
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thirsty = module.boolean(module.params['thirsty'])
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if os.path.isdir(dest):
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dest = os.path.join(dest, url_filename(url))
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if not thirsty:
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if os.path.exists(dest):
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module.exit_json(msg="file already exists", dest=dest, url=url, changed=False)
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# download to tmpsrc
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tmpsrc, info = url_get(module, url, dest)
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md5sum_src = None
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md5sum_dest = None
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# raise an error if there is no tmpsrc file
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if not os.path.exists(tmpsrc):
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os.remove(tmpsrc)
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module.fail_json(msg="Request failed", status_code=info['status'], response=info['msg'])
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if not os.access(tmpsrc, os.R_OK):
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os.remove(tmpsrc)
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module.fail_json( msg="Source %s not readable" % (tmpsrc))
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md5sum_src = module.md5(tmpsrc)
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# check if there is no dest file
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if os.path.exists(dest):
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# raise an error if copy has no permission on dest
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if not os.access(dest, os.W_OK):
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os.remove(tmpsrc)
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module.fail_json( msg="Destination %s not writable" % (dest))
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if not os.access(dest, os.R_OK):
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os.remove(tmpsrc)
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module.fail_json( msg="Destination %s not readable" % (dest))
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md5sum_dest = module.md5(dest)
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else:
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if not os.access(os.path.dirname(dest), os.W_OK):
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os.remove(tmpsrc)
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module.fail_json( msg="Destination %s not writable" % (os.path.dirname(dest)))
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if md5sum_src != md5sum_dest:
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try:
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shutil.copyfile(tmpsrc, dest)
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except Exception, err:
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os.remove(tmpsrc)
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module.fail_json(msg="failed to copy %s to %s: %s" % (tmpsrc, dest, str(err)))
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changed = True
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else:
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changed = False
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os.remove(tmpsrc)
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# allow file attribute changes
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module.params['path'] = dest
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file_args = module.load_file_common_arguments(module.params)
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file_args['path'] = dest
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changed = module.set_file_attributes_if_different(file_args, changed)
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# Mission complete
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module.exit_json(url=url, dest=dest, src=tmpsrc, md5sum=md5sum_src,
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changed=changed, msg=info.get('msg',''),
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daisychain="file", daisychain_args=info.get('daisychain_args',''))
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# this is magic, see lib/ansible/module_common.py
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#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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main()
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