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# The MIT License
#
# Copyright 2013 Sony Mobile Communications. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
""" Interface to the Gerrit REST API. """
import json
import requests
GERRIT_MAGIC_JSON_PREFIX = ")]}\'\n"
GERRIT_AUTH_SUFFIX = "/a"
class GerritRestAPIAuthentication(requests.auth.HTTPDigestAuth):
""" HTTP Digest Auth with netrc credentials. """
def __init__(self, url, username=None, password=None):
self.username = username
self.password = password
if not (self.username and self.password):
(self.username, self.password) = \
requests.utils.get_netrc_auth(url)
if (self.username and self.password):
super(GerritRestAPIAuthentication, self).__init__(self.username,
self.password)
def __call__(self, req):
if (self.username and self.password):
req = super(GerritRestAPIAuthentication, self).__call__(req)
return req
def is_authenticated(self):
""" Return True if authentication credentials are present. """
return (self.username and self.password)
def _decode_response(response):
""" Decode the `response` received from a REST API call.
Strip off Gerrit's magic prefix if it is there, and return decoded
JSON content or raw text if it cannot be decoded as JSON.
"""
content = response.content
if content.startswith(GERRIT_MAGIC_JSON_PREFIX):
content = content[len(GERRIT_MAGIC_JSON_PREFIX):]
try:
return json.loads(content)
except ValueError:
return content.strip()
class GerritRestAPI(object):
""" Interface to the Gerrit REST API. """
def __init__(self, url, username=None, password=None):
""" Constructor.
`url` is assumed to be the full URL to the server, including the
'http(s)://' prefix.
HTTP digest authentication is used with the given `username` and
`password`. If both are not given, an attempt is made to get them
from the netrc file. If that fails, anonymous access is used and
functionality is limited.
"""
self.kwargs = {}
self.url = url
self.session = requests.session()
self.url = url.rstrip('/')
auth = GerritRestAPIAuthentication(url, username, password)
if auth.is_authenticated():
self.kwargs['auth'] = auth
if not self.url.endswith(GERRIT_AUTH_SUFFIX):
self.url += GERRIT_AUTH_SUFFIX
else:
if self.url.endswith(GERRIT_AUTH_SUFFIX):
self.url = self.url[: - len(GERRIT_AUTH_SUFFIX)]
def _get(self, endpoint, params=None):
""" Send HTTP GET to `endpoint`.
Return JSON decoded result.
"""
kwargs = self.kwargs.copy()
if params:
kwargs['params'] = params
response = self.session.get(self.url + endpoint, **kwargs)
return _decode_response(response)
def _put(self, endpoint, params=None, data=None):
""" Send HTTP PUT to `endpoint`.
Return JSON decoded result.
"""
kwargs = self.kwargs.copy()
if params:
kwargs['params'] = params
if data:
kwargs['data'] = data
response = self.session.put(self.url + endpoint, **kwargs)
return _decode_response(response)
def _post(self, endpoint, params=None, data=None):
""" Send HTTP POST to `endpoint`.
Return JSON decoded result.
"""
kwargs = self.kwargs.copy()
if params:
kwargs['params'] = params
if data:
kwargs['data'] = data
response = self.session.post(self.url + endpoint, **kwargs)
return _decode_response(response)
def _delete(self, endpoint):
""" Send HTTP DELETE to `endpoint`.
Return JSON decoded result.
"""
kwargs = self.kwargs.copy()
response = self.session.delete(self.url + endpoint, **kwargs)
return _decode_response(response)
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