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handlebars.python.asyncio.rest.mustache Maven / Gradle / Ivy
# coding: utf-8
{{>partial_header}}
import io
import json
import logging
import re
import ssl
import aiohttp
import certifi
# python 2 and python 3 compatibility library
from six.moves.urllib.parse import urlencode
logger = logging.getLogger(__name__)
class RESTResponse(io.IOBase):
def __init__(self, resp, data):
self.aiohttp_response = resp
self.status = resp.status
self.reason = resp.reason
self.data = data
def getheaders(self):
"""Returns a CIMultiDictProxy of the response headers."""
return self.aiohttp_response.headers
def getheader(self, name, default=None):
"""Returns a given response header."""
return self.aiohttp_response.headers.get(name, default)
class RESTClientObject(object):
def __init__(self, configuration, pools_size=4, maxsize=4):
# maxsize is number of requests to host that are allowed in parallel
# ca_certs vs cert_file vs key_file
# http://stackoverflow.com/a/23957365/2985775
# ca_certs
if configuration.ssl_ca_cert:
ca_certs = configuration.ssl_ca_cert
else:
# if not set certificate file, use Mozilla's root certificates.
ca_certs = certifi.where()
ssl_context = ssl.create_default_context(cafile=ca_certs)
if configuration.cert_file:
ssl_context.load_cert_chain(
configuration.cert_file, keyfile=configuration.key_file
)
connector = aiohttp.TCPConnector(
limit=maxsize,
ssl_context=ssl_context,
verify_ssl=configuration.verify_ssl
)
# https pool manager
if configuration.proxy:
self.pool_manager = aiohttp.ClientSession(
connector=connector,
proxy=configuration.proxy
)
else:
self.pool_manager = aiohttp.ClientSession(
connector=connector
)
async def request(self, method, url, query_params=None, headers=None,
body=None, post_params=None, _preload_content=True,
_request_timeout=None):
"""Execute request
:param method: http request method
:param url: http request url
:param query_params: query parameters in the url
:param headers: http request headers
:param body: request json body, for `application/json`
:param post_params: request post parameters,
`application/x-www-form-urlencoded`
and `multipart/form-data`
:param _preload_content: this is a non-applicable field for
the AiohttpClient.
:param _request_timeout: timeout setting for this request. If one
number provided, it will be total request
timeout. It can also be a pair (tuple) of
(connection, read) timeouts.
"""
method = method.upper()
assert method in ['GET', 'HEAD', 'DELETE', 'POST', 'PUT',
'PATCH', 'OPTIONS']
if post_params and body:
raise ValueError(
"body parameter cannot be used with post_params parameter."
)
post_params = post_params or {}
headers = headers or {}
timeout = _request_timeout or 5 * 60
if 'Content-Type' not in headers:
headers['Content-Type'] = 'application/json'
args = {
"method": method,
"url": url,
"timeout": timeout,
"headers": headers
}
if query_params:
args["url"] += '?' + urlencode(query_params)
# For `POST`, `PUT`, `PATCH`, `OPTIONS`, `DELETE`
if method in ['POST', 'PUT', 'PATCH', 'OPTIONS', 'DELETE']:
if re.search('json', headers['Content-Type'], re.IGNORECASE):
if body is not None:
body = json.dumps(body)
args["data"] = body
elif headers['Content-Type'] == 'application/x-www-form-urlencoded': # noqa: E501
args["data"] = aiohttp.FormData(post_params)
elif headers['Content-Type'] == 'multipart/form-data':
# must del headers['Content-Type'], or the correct
# Content-Type which generated by aiohttp
del headers['Content-Type']
data = aiohttp.FormData()
for param in post_params:
k, v = param
if isinstance(v, tuple) and len(v) == 3:
data.add_field(k,
value=v[1],
filename=v[0],
content_type=v[2])
else:
data.add_field(k, v)
args["data"] = data
# Pass a `bytes` parameter directly in the body to support
# other content types than Json when `body` argument is provided
# in serialized form
elif isinstance(body, bytes):
args["data"] = body
else:
# Cannot generate the request from given parameters
msg = """Cannot prepare a request message for provided
arguments. Please check that your arguments match
declared content type."""
raise ApiException(status=0, reason=msg)
async with self.pool_manager.request(**args) as r:
data = await r.text()
r = RESTResponse(r, data)
# log response body
logger.debug("response body: %s", r.data)
if not 200 <= r.status <= 299:
raise ApiException(http_resp=r)
return r
async def GET(self, url, headers=None, query_params=None,
_preload_content=True, _request_timeout=None):
return (await self.request("GET", url,
headers=headers,
_preload_content=_preload_content,
_request_timeout=_request_timeout,
query_params=query_params))
async def HEAD(self, url, headers=None, query_params=None,
_preload_content=True, _request_timeout=None):
return (await self.request("HEAD", url,
headers=headers,
_preload_content=_preload_content,
_request_timeout=_request_timeout,
query_params=query_params))
async def OPTIONS(self, url, headers=None, query_params=None,
post_params=None, body=None, _preload_content=True,
_request_timeout=None):
return (await self.request("OPTIONS", url,
headers=headers,
query_params=query_params,
post_params=post_params,
_preload_content=_preload_content,
_request_timeout=_request_timeout,
body=body))
async def DELETE(self, url, headers=None, query_params=None, body=None,
_preload_content=True, _request_timeout=None):
return (await self.request("DELETE", url,
headers=headers,
query_params=query_params,
_preload_content=_preload_content,
_request_timeout=_request_timeout,
body=body))
async def POST(self, url, headers=None, query_params=None,
post_params=None, body=None, _preload_content=True,
_request_timeout=None):
return (await self.request("POST", url,
headers=headers,
query_params=query_params,
post_params=post_params,
_preload_content=_preload_content,
_request_timeout=_request_timeout,
body=body))
async def PUT(self, url, headers=None, query_params=None, post_params=None,
body=None, _preload_content=True, _request_timeout=None):
return (await self.request("PUT", url,
headers=headers,
query_params=query_params,
post_params=post_params,
_preload_content=_preload_content,
_request_timeout=_request_timeout,
body=body))
async def PATCH(self, url, headers=None, query_params=None,
post_params=None, body=None, _preload_content=True,
_request_timeout=None):
return (await self.request("PATCH", url,
headers=headers,
query_params=query_params,
post_params=post_params,
_preload_content=_preload_content,
_request_timeout=_request_timeout,
body=body))
class ApiException(Exception):
def __init__(self, status=None, reason=None, http_resp=None):
if http_resp:
self.status = http_resp.status
self.reason = http_resp.reason
self.body = http_resp.data
self.headers = http_resp.getheaders()
else:
self.status = status
self.reason = reason
self.body = None
self.headers = None
def __str__(self):
"""Custom error messages for exception"""
error_message = "({0})\nReason: {1}\n".format(self.status, self.reason)
if self.headers:
error_message += "HTTP response headers: {0}\n".format(
self.headers)
if self.body:
error_message += "HTTP response body: {0}\n".format(self.body)
return error_message
