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community.general/library/network/uri
Richard Isaacson 5a15762739 Merge pull request #5826 from romeotheriault/fix_follow_redirects 
A fix for uri module regarding following redirects. The old behavior would follow redirects either way. This change clarifies the functionality and makes it a bit more explicit. Comparing the old behavior to the new 'yes' == 'all', 'no' == 'safe' and now 'no' will not follow any redirects. Historic behavior is still supported and documented with a push to the new values.
2014-02-07 11:36:51 -06:00

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2013, Romeo Theriault <romeot () hawaii.edu>
#
# 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/>.
#
# see examples/playbooks/uri.yml
import shutil
import tempfile
import base64
import datetime
try:
import json
except ImportError:
import simplejson as json
DOCUMENTATION = '''
---
module: uri
short_description: Interacts with webservices
description:
- Interacts with HTTP and HTTPS web services and supports Digest, Basic and WSSE
HTTP authentication mechanisms.
version_added: "1.1"
options:
url:
description:
- HTTP or HTTPS URL in the form (http|https)://host.domain[:port]/path
required: true
default: null
aliases: []
dest:
description:
- path of where to download the file to (if desired). If I(dest) is a directory, the basename of the file on the remote server will be used.
required: false
default: null
user:
description:
- username for the module to use for Digest, Basic or WSSE authentication.
required: false
default: null
password:
description:
- password for the module to use for Digest, Basic or WSSE authentication.
required: false
default: null
body:
description:
- The body of the http request/response to the web service.
required: false
default: null
method:
description:
- The HTTP method of the request or response.
required: false
choices: [ "GET", "POST", "PUT", "HEAD", "DELETE", "OPTIONS", "PATCH" ]
default: "GET"
return_content:
description:
- Whether or not to return the body of the request as a "content" key in the dictionary result. If the reported Content-type is "application/json", then the JSON is additionally loaded into a key called C(json) in the dictionary results.
required: false
choices: [ "yes", "no" ]
default: "no"
force_basic_auth:
description:
- httplib2, the library used by the uri module only sends authentication information when a webservice
responds to an initial request with a 401 status. Since some basic auth services do not properly
send a 401, logins will fail. This option forces the sending of the Basic authentication header
upon initial request.
required: false
choices: [ "yes", "no" ]
default: "no"
follow_redirects:
description:
- Whether or not the URI module should follow redirects. C(all) will follow all redirects.
C(safe) will follow only "safe" redirects, where "safe" means that the client is only
doing a GET or HEAD on the URI to which it is being redirected. C(none) will not follow
any redirects. Note that C(yes) and C(no) choices are accepted for backwards compatibility,
where C(yes) is the equivalent of C(all) and C(no) is the equivalent of C(safe). C(yes) and C(no)
are deprecated and will be removed in some future version of Ansible.
required: false
choices: [ "all", "safe", "none" ]
default: "safe"
creates:
description:
- a filename, when it already exists, this step will not be run.
required: false
removes:
description:
- a filename, when it does not exist, this step will not be run.
required: false
status_code:
description:
- A valid, numeric, HTTP status code that signifies success of the request.
required: false
default: 200
timeout:
description:
- The socket level timeout in seconds
required: false
default: 30
HEADER_:
description:
- Any parameter starting with "HEADER_" is a sent with your request as a header.
For example, HEADER_Content-Type="application/json" would send the header
"Content-Type" along with your request with a value of "application/json".
required: false
default: null
others:
description:
- all arguments accepted by the M(file) module also work here
required: false
# informational: requirements for nodes
requirements: [ urlparse, httplib2 ]
author: Romeo Theriault
'''
EXAMPLES = '''
# Check that you can connect (GET) to a page and it returns a status 200
- uri: url=http://www.example.com
# Check that a page returns a status 200 and fail if the word AWESOME is not in the page contents.
- action: uri url=http://www.example.com return_content=yes
register: webpage
- action: fail
when: 'AWESOME' not in "{{ webpage.content }}"
# Create a JIRA issue.
- action: >
uri url=https://your.jira.example.com/rest/api/2/issue/
method=POST user=your_username password=your_pass
body="{{ lookup('file','issue.json') }}" force_basic_auth=yes
status_code=201 HEADER_Content-Type="application/json"
- action: >
uri url=https://your.form.based.auth.examle.com/index.php
method=POST body="name=your_username&password=your_password&enter=Sign%20in"
status_code=302 HEADER_Content-Type="application/x-www-form-urlencoded"
register: login
# Login to a form based webpage, then use the returned cookie to
# access the app in later tasks.
- action: uri url=https://your.form.based.auth.example.com/dashboard.php
method=GET return_content=yes HEADER_Cookie="{{login.set_cookie}}"
'''
HAS_HTTPLIB2 = True
try:
import httplib2
except ImportError:
HAS_HTTPLIB2 = False
HAS_URLPARSE = True
try:
import urlparse
import socket
except ImportError:
HAS_URLPARSE = False
def write_file(module, url, dest, content):
# create a tempfile with some test content
fd, tmpsrc = tempfile.mkstemp()
f = open(tmpsrc, 'wb')
try:
f.write(content)
except Exception, err:
os.remove(tmpsrc)
module.fail_json(msg="failed to create temporary content file: %s" % str(err))
f.close()
md5sum_src = None
md5sum_dest = None
# raise an error if there is no tmpsrc file
if not os.path.exists(tmpsrc):
os.remove(tmpsrc)
module.fail_json(msg="Source %s does not exist" % (tmpsrc))
if not os.access(tmpsrc, os.R_OK):
os.remove(tmpsrc)
module.fail_json( msg="Source %s not readable" % (tmpsrc))
md5sum_src = module.md5(tmpsrc)
# check if there is no dest file
if os.path.exists(dest):
# raise an error if copy has no permission on dest
if not os.access(dest, os.W_OK):
os.remove(tmpsrc)
module.fail_json( msg="Destination %s not writable" % (dest))
if not os.access(dest, os.R_OK):
os.remove(tmpsrc)
module.fail_json( msg="Destination %s not readable" % (dest))
md5sum_dest = module.md5(dest)
else:
if not os.access(os.path.dirname(dest), os.W_OK):
os.remove(tmpsrc)
module.fail_json( msg="Destination dir %s not writable" % (os.path.dirname(dest)))
if md5sum_src != md5sum_dest:
try:
shutil.copyfile(tmpsrc, dest)
except Exception, err:
os.remove(tmpsrc)
module.fail_json(msg="failed to copy %s to %s: %s" % (tmpsrc, dest, str(err)))
os.remove(tmpsrc)
def url_filename(url):
fn = os.path.basename(urlparse.urlsplit(url)[2])
if fn == '':
return 'index.html'
return fn
def uri(module, url, dest, user, password, body, method, headers, redirects, socket_timeout):
# To debug
#httplib2.debug = 4
# Handle Redirects
if redirects == "all" or redirects == "yes":
follow_redirects = True
follow_all_redirects = True
elif redirects == "none":
follow_redirects = False
follow_all_redirects = False
else:
follow_redirects = True
follow_all_redirects = False
# Create a Http object and set some default options.
h = httplib2.Http(disable_ssl_certificate_validation=True, timeout=socket_timeout)
h.follow_all_redirects = follow_all_redirects
h.follow_redirects = follow_redirects
h.forward_authorization_headers = True
# If they have a username or password verify they have both, then add them to the request
if user is not None and password is None:
module.fail_json(msg="Both a username and password need to be set.")
if password is not None and user is None:
module.fail_json(msg="Both a username and password need to be set.")
if user is not None and password is not None:
h.add_credentials(user, password)
# is dest is set and is a directory, let's check if we get redirected and
# set the filename from that url
redirected = False
resp_redir = {}
r = {}
if dest is not None:
dest = os.path.expanduser(dest)
if os.path.isdir(dest):
# first check if we are redirected to a file download
h.follow_redirects=False
# Try the request
try:
resp_redir, content_redir = h.request(url, method=method, body=body, headers=headers)
# if we are redirected, update the url with the location header,
# and update dest with the new url filename
except:
pass
if 'status' in resp_redir and resp_redir['status'] in ["301", "302", "303", "307"]:
url = resp_redir['location']
redirected = True
dest = os.path.join(dest, url_filename(url))
# if destination file already exist, only download if file newer
if os.path.exists(dest):
t = datetime.datetime.utcfromtimestamp(os.path.getmtime(dest))
tstamp = t.strftime('%a, %d %b %Y %H:%M:%S +0000')
headers['If-Modified-Since'] = tstamp
# do safe redirects now, including 307
h.follow_redirects=follow_redirects
# Make the request, or try to :)
try:
resp, content = h.request(url, method=method, body=body, headers=headers)
r['redirected'] = redirected
r.update(resp_redir)
r.update(resp)
return r, content, dest
except httplib2.RedirectMissingLocation:
module.fail_json(msg="A 3xx redirect response code was provided but no Location: header was provided to point to the new location.")
except httplib2.RedirectLimit:
module.fail_json(msg="The maximum number of redirections was reached without coming to a final URI.")
except httplib2.ServerNotFoundError:
module.fail_json(msg="Unable to resolve the host name given.")
except httplib2.RelativeURIError:
module.fail_json(msg="A relative, as opposed to an absolute URI, was passed in.")
except httplib2.FailedToDecompressContent:
module.fail_json(msg="The headers claimed that the content of the response was compressed but the decompression algorithm applied to the content failed.")
except httplib2.UnimplementedDigestAuthOptionError:
module.fail_json(msg="The server requested a type of Digest authentication that we are unfamiliar with.")
except httplib2.UnimplementedHmacDigestAuthOptionError:
module.fail_json(msg="The server requested a type of HMACDigest authentication that we are unfamiliar with.")
except httplib2.UnimplementedHmacDigestAuthOptionError:
module.fail_json(msg="The server requested a type of HMACDigest authentication that we are unfamiliar with.")
except socket.error, e:
module.fail_json(msg="Socket error: %s to %s" % (e, url))
def main():
module = AnsibleModule(
argument_spec = dict(
url = dict(required=True),
dest = dict(required=False, default=None),
user = dict(required=False, default=None),
password = dict(required=False, default=None),
body = dict(required=False, default=None),
method = dict(required=False, default='GET', choices=['GET', 'POST', 'PUT', 'HEAD', 'DELETE', 'OPTIONS', 'PATCH']),
return_content = dict(required=False, default='no', type='bool'),
force_basic_auth = dict(required=False, default='no', type='bool'),
follow_redirects = dict(required=False, default='safe', choices=['all', 'safe', 'none', 'yes', 'no']),
creates = dict(required=False, default=None),
removes = dict(required=False, default=None),
status_code = dict(required=False, default=200, type='int'),
timeout = dict(required=False, default=30, type='int'),
),
check_invalid_arguments=False,
add_file_common_args=True
)
if not HAS_HTTPLIB2:
module.fail_json(msg="httplib2 is not installed")
if not HAS_URLPARSE:
module.fail_json(msg="urlparse is not installed")
url = module.params['url']
user = module.params['user']
password = module.params['password']
body = module.params['body']
method = module.params['method']
dest = module.params['dest']
return_content = module.params['return_content']
force_basic_auth = module.params['force_basic_auth']
redirects = module.params['follow_redirects']
creates = module.params['creates']
removes = module.params['removes']
status_code = int(module.params['status_code'])
socket_timeout = module.params['timeout']
# Grab all the http headers. Need this hack since passing multi-values is currently a bit ugly. (e.g. headers='{"Content-Type":"application/json"}')
dict_headers = {}
for key, value in module.params.iteritems():
if key.startswith("HEADER_"):
skey = key.replace("HEADER_", "")
dict_headers[skey] = value
if creates is not None:
# do not run the command if the line contains creates=filename
# and the filename already exists. This allows idempotence
# of uri executions.
creates = os.path.expanduser(creates)
if os.path.exists(creates):
module.exit_json(stdout="skipped, since %s exists" % creates, skipped=True, changed=False, stderr=False, rc=0)
if removes is not None:
# do not run the command if the line contains removes=filename
# and the filename do not exists. This allows idempotence
# of uri executions.
v = os.path.expanduser(removes)
if not os.path.exists(removes):
module.exit_json(stdout="skipped, since %s does not exist" % removes, skipped=True, changed=False, stderr=False, rc=0)
# httplib2 only sends authentication after the server asks for it with a 401.
# Some 'basic auth' servies fail to send a 401 and require the authentication
# up front. This creates the Basic authentication header and sends it immediately.
if force_basic_auth:
dict_headers["Authorization"] = "Basic {0}".format(base64.b64encode("{0}:{1}".format(user, password)))
# Make the request
resp, content, dest = uri(module, url, dest, user, password, body, method, dict_headers, redirects, socket_timeout)
resp['status'] = int(resp['status'])
# Write the file out if requested
if dest is not None:
if resp['status'] == 304:
status_code = 304
changed = False
else:
write_file(module, url, dest, content)
# allow file attribute changes
changed = True
module.params['path'] = dest
file_args = module.load_file_common_arguments(module.params)
file_args['path'] = dest
changed = module.set_file_attributes_if_different(file_args, changed)
resp['path'] = dest
else:
changed = False
# Transmogrify the headers, replacing '-' with '_', since variables dont work with dashes.
uresp = {}
for key, value in resp.iteritems():
ukey = key.replace("-", "_")
uresp[ukey] = value
if 'content_type' in uresp:
if uresp['content_type'].startswith('application/json'):
try:
js = json.loads(content)
uresp['json'] = js
except:
pass
if resp['status'] != status_code:
module.fail_json(msg="Status code was not " + str(status_code), content=content, **uresp)
elif return_content:
module.exit_json(changed=changed, content=content, **uresp)
else:
module.exit_json(changed=changed, **uresp)
# import module snippets
from ansible.module_utils.basic import *
main()
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