rest.py

Go to the documentation of this file.

# coding: utf-8
 
"""
    cloudFPGA Resource Manager API
 
    No description provided (generated by Swagger Codegen https://github.com/swagger-api/swagger-codegen)  # noqa: E501
 
    OpenAPI spec version: 0.8
    
    Generated by: https://github.com/swagger-api/swagger-codegen.git
"""
 
from __future__ import absolute_import
 
import io
import json
import logging
import re
import ssl
 
import certifi
# python 2 and python 3 compatibility library
import six
from six.moves.urllib.parse import urlencode
 
try:
    import urllib3
except ImportError:
    raise ImportError('Swagger python client requires urllib3.')
 
 
logger = logging.getLogger(__name__)
 
 
class RESTResponse(io.IOBase):
 
    def __init__(self, resp):
        self.urllib3_responseurllib3_response = resp
        self.statusstatus = resp.status
        self.reasonreason = resp.reason
        self.datadata = resp.data
 
    def getheaders(self):
        """Returns a dictionary of the response headers."""
        return self.urllib3_responseurllib3_response.getheaders()
 
    def getheader(self, name, default=None):
        """Returns a given response header."""
        return self.urllib3_responseurllib3_response.getheader(name, default)
 
 
class RESTClientObject(object):
 
    def __init__(self, configuration, pools_size=4, maxsize=None):
        # urllib3.PoolManager will pass all kw parameters to connectionpool
        # https://github.com/shazow/urllib3/blob/f9409436f83aeb79fbaf090181cd81b784f1b8ce/urllib3/poolmanager.py#L75  # noqa: E501
        # https://github.com/shazow/urllib3/blob/f9409436f83aeb79fbaf090181cd81b784f1b8ce/urllib3/connectionpool.py#L680  # noqa: E501
        # maxsize is the number of requests to host that are allowed in parallel  # noqa: E501
        # Custom SSL certificates and client certificates: http://urllib3.readthedocs.io/en/latest/advanced-usage.html  # noqa: E501
 
        # cert_reqs
        if configuration.verify_ssl:
            cert_reqs = ssl.CERT_REQUIRED
        else:
            cert_reqs = ssl.CERT_NONE
 
        # 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()
 
        addition_pool_args = {}
        if configuration.assert_hostname is not None:
            addition_pool_args['assert_hostname'] = configuration.assert_hostname  # noqa: E501
 
        if maxsize is None:
            if configuration.connection_pool_maxsize is not None:
                maxsize = configuration.connection_pool_maxsize
            else:
                maxsize = 4
 
        # https pool manager
        if configuration.proxy:
            self.pool_managerpool_manager = urllib3.ProxyManager(
                num_pools=pools_size,
                maxsize=maxsize,
                cert_reqs=cert_reqs,
                ca_certs=ca_certs,
                cert_file=configuration.cert_file,
                key_file=configuration.key_file,
                proxy_url=configuration.proxy,
                **addition_pool_args
            )
        else:
            self.pool_managerpool_manager = urllib3.PoolManager(
                num_pools=pools_size,
                maxsize=maxsize,
                cert_reqs=cert_reqs,
                ca_certs=ca_certs,
                cert_file=configuration.cert_file,
                key_file=configuration.key_file,
                **addition_pool_args
            )
 
    def request(self, method, url, query_params=None, headers=None,
                body=None, post_params=None, _preload_content=True,
                _request_timeout=None):
        """Perform requests.
 
        :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: if False, the urllib3.HTTPResponse object will
                                 be returned without reading/decoding response
                                 data. Default is True.
        :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 = None
        if _request_timeout:
            if isinstance(_request_timeout, (int, ) if six.PY3 else (int, long)):  # noqa: E501,F821
                timeout = urllib3.Timeout(total=_request_timeout)
            elif (isinstance(_request_timeout, tuple) and
                  len(_request_timeout) == 2):
                timeout = urllib3.Timeout(
                    connect=_request_timeout[0], read=_request_timeout[1])
 
        if 'Content-Type' not in headers:
            headers['Content-Type'] = 'application/json'
 
        try:
            # For `POST`, `PUT`, `PATCH`, `OPTIONS`, `DELETE`
            if method in ['POST', 'PUT', 'PATCH', 'OPTIONS', 'DELETE']:
                if query_params:
                    url += '?' + urlencode(query_params)
                if re.search('json', headers['Content-Type'], re.IGNORECASE):
                    request_body = '{}'
                    if body is not None:
                        request_body = json.dumps(body)
                    r = self.pool_managerpool_manager.request(
                        method, url,
                        body=request_body,
                        preload_content=_preload_content,
                        timeout=timeout,
                        headers=headers)
                elif headers['Content-Type'] == 'application/x-www-form-urlencoded':  # noqa: E501
                    r = self.pool_managerpool_manager.request(
                        method, url,
                        fields=post_params,
                        encode_multipart=False,
                        preload_content=_preload_content,
                        timeout=timeout,
                        headers=headers)
                elif headers['Content-Type'] == 'multipart/form-data':
                    # must del headers['Content-Type'], or the correct
                    # Content-Type which generated by urllib3 will be
                    # overwritten.
                    del headers['Content-Type']
                    r = self.pool_managerpool_manager.request(
                        method, url,
                        fields=post_params,
                        encode_multipart=True,
                        preload_content=_preload_content,
                        timeout=timeout,
                        headers=headers)
                # Pass a `string` parameter directly in the body to support
                # other content types than Json when `body` argument is
                # provided in serialized form
                elif isinstance(body, str):
                    request_body = body
                    r = self.pool_managerpool_manager.request(
                        method, url,
                        body=request_body,
                        preload_content=_preload_content,
                        timeout=timeout,
                        headers=headers)
                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)
            # For `GET`, `HEAD`
            else:
                r = self.pool_managerpool_manager.request(method, url,
                                              fields=query_params,
                                              preload_content=_preload_content,
                                              timeout=timeout,
                                              headers=headers)
        except urllib3.exceptions.SSLError as e:
            msg = "{0}\n{1}".format(type(e).__name__, str(e))
            raise ApiException(status=0, reason=msg)
 
        if _preload_content:
            r = RESTResponse(r)
 
            # log response body
            logger.debug("response body: %s", r.data)
 
        if not 200 <= r.status <= 299:
            raise ApiException(http_resp=r)
 
        return r
 
    def GET(self, url, headers=None, query_params=None, _preload_content=True,
            _request_timeout=None):
        return self.requestrequest("GET", url,
                            headers=headers,
                            _preload_content=_preload_content,
                            _request_timeout=_request_timeout,
                            query_params=query_params)
 
    def HEAD(self, url, headers=None, query_params=None, _preload_content=True,
             _request_timeout=None):
        return self.requestrequest("HEAD", url,
                            headers=headers,
                            _preload_content=_preload_content,
                            _request_timeout=_request_timeout,
                            query_params=query_params)
 
    def OPTIONS(self, url, headers=None, query_params=None, post_params=None,
                body=None, _preload_content=True, _request_timeout=None):
        return self.requestrequest("OPTIONS", url,
                            headers=headers,
                            query_params=query_params,
                            post_params=post_params,
                            _preload_content=_preload_content,
                            _request_timeout=_request_timeout,
                            body=body)
 
    def DELETE(self, url, headers=None, query_params=None, body=None,
               _preload_content=True, _request_timeout=None):
        return self.requestrequest("DELETE", url,
                            headers=headers,
                            query_params=query_params,
                            _preload_content=_preload_content,
                            _request_timeout=_request_timeout,
                            body=body)
 
    def POST(self, url, headers=None, query_params=None, post_params=None,
             body=None, _preload_content=True, _request_timeout=None):
        return self.requestrequest("POST", url,
                            headers=headers,
                            query_params=query_params,
                            post_params=post_params,
                            _preload_content=_preload_content,
                            _request_timeout=_request_timeout,
                            body=body)
 
    def PUT(self, url, headers=None, query_params=None, post_params=None,
            body=None, _preload_content=True, _request_timeout=None):
        return self.requestrequest("PUT", url,
                            headers=headers,
                            query_params=query_params,
                            post_params=post_params,
                            _preload_content=_preload_content,
                            _request_timeout=_request_timeout,
                            body=body)
 
    def PATCH(self, url, headers=None, query_params=None, post_params=None,
              body=None, _preload_content=True, _request_timeout=None):
        return self.requestrequest("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.statusstatus = http_resp.status
            self.reasonreason = http_resp.reason
            self.bodybody = http_resp.data
            self.headersheaders = http_resp.getheaders()
        else:
            self.statusstatus = status
            self.reasonreason = reason
            self.bodybody = None
            self.headersheaders = None
 
    def __str__(self):
        """Custom error messages for exception"""
        error_message = "({0})\n"\
                        "Reason: {1}\n".format(self.statusstatus, self.reasonreason)
        if self.headersheaders:
            error_message += "HTTP response headers: {0}\n".format(
                self.headersheaders)
 
        if self.bodybody:
            error_message += "HTTP response body: {0}\n".format(self.bodybody)
 
        return error_message