mirror of https://github.com/ansible/ansible.git
new module: get_url
get module (with new module-magic-code!) Usage: ansible -m get -a "url=http://xxxxxxx dest=fileordirctory" all cleanups as per @mpdehaan's suggestions add daisychain added example playbook (get_url.yml) with URLencode examplereviewable/pr18780/r1
Jan-Piet Mens
13 years ago
parent
853d1179e0
commit
b4d4811077
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#!/usr/bin/python
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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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# Synopsis:
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# ansible -m get_url -a "url=http://some.place/some.file dest=/tmp/file"
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#
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# Arguments:
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# url= (mandatory, no default)
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# dest= (mandatory, no default)
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# if dest= is a file, url is copied to that file
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# if dest= is a directory, determine name from url= and store it in dest/
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# mode, owner, group, ... from the "file" module are also supported
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#
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# Playbook:
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# The dest=<directory> feature lets you do this in a Playbook:
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#
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# - name: Grab a bunch of jQuery stuff
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# action: get_url url=http://code.jquery.com/$item dest=${jquery_directory} mode=0444
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# with_items:
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# - jquery.min.js
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# - mobile/latest/jquery.mobile.min.js
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# - ui/jquery-ui-git.css
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#
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# TODO:
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# timeout=
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# Support gzip compression?
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# http://www.diveintopython.net/http_web_services/gzip_compression.html
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import sys
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import os
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import shlex
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import shutil
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import syslog
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import datetime
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import tempfile
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try:
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from hashlib import md5 as _md5
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except ImportError:
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from md5 import md5 as _md5
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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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# support
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def md5(filename):
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''' Return MD5 hex digest of local file, or None if file is not present. '''
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if not os.path.exists(filename):
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return None
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digest = _md5()
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blocksize = 64 * 1024
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infile = open(filename, 'rb')
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block = infile.read(blocksize)
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while block:
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digest.update(block)
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block = infile.read(blocksize)
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infile.close()
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return digest.hexdigest()
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# ==============================================================
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# url handling
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def url_filename(url):
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return os.path.basename(urlparse.urlsplit(url)[2])
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def url_do_get(url, dest):
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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 = {}
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info['url'] = url
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r = None
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if dest:
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if os.path.isdir(dest):
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destpath = "%s/%s" % (dest, url_filename(url))
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else:
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destpath = dest
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else:
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destpath = url_filename(url)
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info['destpath'] = destpath
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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(destpath):
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t = datetime.datetime.utcfromtimestamp(os.path.getmtime(destpath))
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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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dinfo = dict(r.info())
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for x in dinfo:
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info[x] = dinfo[x]
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info['msg'] = "OK %s octets" % r.headers.get('Content-Length', 'unknown')
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info['status'] = 200
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except urllib2.HTTPError as e:
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# Must not fail_json() here so caller can handle HTTP 304 unmodified
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info['msg'] = "%s" % e
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info['status'] = e.code
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return r, info
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except urllib2.URLError as e:
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if 'code' in e:
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co = e.code
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else:
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co = -1
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resp = "%s" % e
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module.fail_json(msg="Request failed", status_code=co, response=resp)
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return r, info
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def url_get(url, dest):
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"""Get url and store at dest. If dest is a directory, determine filename
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from url, otherwise dest is a file
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Return info about the request.
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"""
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req, info = url_do_get(url, dest)
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# TODO: should really handle 304, but how? src file could exist (and be
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# newer) but be empty ...
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if info['status'] == 304:
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module.exit_json(url=url, dest=info.get('destpath', dest), changed=False, msg=info.get('msg', ''))
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# We have the data. Create a temporary file and copy content into that
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# to do the MD5-thing
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if info['status'] == 200:
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destpath = info['destpath']
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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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else:
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module.fail_json(msg="Request failed", status_code=info['status'], response=info['msg'], url=url)
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# ==============================================================
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# main
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def main():
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global module
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module = AnsibleModule(
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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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)
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)
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url = module.params.get('url', '')
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dest = module.params.get('dest', '')
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if url == "":
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module.fail_json(msg="url= URL missing")
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if dest == "":
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module.fail_json(msg="dest= missing")
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dest = os.path.expanduser(dest)
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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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# Here we go... if this succeeds, tmpsrc is the name of a temporary file
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# containing slurped content. If it fails, we've already raised an error
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# to Ansible
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tmpsrc, info = url_get(url, dest)
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md5sum_src = None
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dest = info.get('destpath', 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 = md5(tmpsrc)
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md5sum_dest = None
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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 = 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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# was os.system("cp %s %s" % (src, 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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# Mission complete
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os.remove(tmpsrc)
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module.exit_json(url=url, dest=dest, src=tmpsrc,
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md5sum=md5sum_src, changed=changed, msg=info.get('msg', ''),
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daisychain="file")
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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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