multivimbroker/multivimbroker/pub/utils/restcall.py

   1 # Copyright (c) 2017 Wind River Systems, Inc.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at:
   6 #       http://www.apache.org/licenses/LICENSE-2.0
   7 #
   8 # Unless required by applicable law or agreed to in writing, software
   9 # distributed under the License is distributed on an "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  11
  12 import sys
  13 import traceback
  14 import logging
  15 import urllib2
  16 import uuid
  17 import httplib2
  18
  19
  20 from multivimbroker.pub.config.config import MSB_SERVICE_IP, MSB_SERVICE_PORT
  21
  22 rest_no_auth, rest_oneway_auth, rest_bothway_auth = 0, 1, 2
  23 HTTP_200_OK, HTTP_201_CREATED = '200', '201'
  24 HTTP_204_NO_CONTENT, HTTP_202_ACCEPTED = '204', '202'
  25 status_ok_list = [HTTP_200_OK, HTTP_201_CREATED,
  26                   HTTP_204_NO_CONTENT, HTTP_202_ACCEPTED]
  27 HTTP_404_NOTFOUND, HTTP_403_FORBIDDEN = '404', '403'
  28 HTTP_401_UNAUTHORIZED, HTTP_400_BADREQUEST = '401', '400'
  29
  30 logger = logging.getLogger(__name__)
  31
  32
  33 def call_req(base_url, user, passwd, auth_type, resource, method,
  34              content='', headers=None):
  35     callid = str(uuid.uuid1())
  36 #    logger.debug("[%s]call_req('%s','%s','%s',%s,'%s','%s','%s')" % (
  37 #    callid, base_url, user, passwd, auth_type, resource, method, content))
  38     ret = None
  39     resp_status = ''
  40     resp = ""
  41     full_url = ""
  42
  43     try:
  44         full_url = combine_url(base_url, resource)
  45         if headers is None:
  46             headers = {}
  47             headers['content-type'] = 'application/json'
  48
  49         if user:
  50             headers['Authorization'] = 'Basic ' + \
  51                 ('%s:%s' % (user, passwd)).encode("base64")
  52         ca_certs = None
  53         for retry_times in range(3):
  54             http = httplib2.Http(
  55                 ca_certs=ca_certs,
  56                 disable_ssl_certificate_validation=(
  57                     auth_type == rest_no_auth))
  58             http.follow_all_redirects = True
  59             try:
  60                 logger.debug("request=%s)" % full_url)
  61                 resp, resp_content = http.request(
  62                     full_url, method=method.upper(),
  63                     body=content, headers=headers)
  64                 resp_status, resp_body = resp['status'], resp_content.decode(
  65                     'UTF-8')
  66
  67                 if resp_status in status_ok_list:
  68                     ret = [0, resp_body, resp_status, resp]
  69                 else:
  70                     ret = [1, resp_body, resp_status, resp]
  71                 break
  72             except Exception as ex:
  73                 if 'httplib.ResponseNotReady' in str(sys.exc_info()):
  74                     logger.error(traceback.format_exc())
  75                     ret = [1, "Unable to connect to %s" %
  76                            full_url, resp_status, resp]
  77                     continue
  78                 raise ex
  79     except urllib2.URLError as err:
  80         ret = [2, str(err), resp_status, resp]
  81     except Exception as ex:
  82         logger.error(traceback.format_exc())
  83         logger.error("[%s]ret=%s" % (callid, str(sys.exc_info())))
  84         res_info = str(sys.exc_info())
  85         if 'httplib.ResponseNotReady' in res_info:
  86             res_info = "The URL[%s] request \
  87             failed or is not responding." % full_url
  88         ret = [3, res_info, resp_status, resp]
  89     except:
  90         logger.error(traceback.format_exc())
  91         ret = [4, str(sys.exc_info()), resp_status, resp]
  92
  93 #    logger.debug("[%s]ret=%s" % (callid, str(ret)))
  94     return ret
  95
  96
  97 def req_by_msb(resource, method, content='', headers=None):
  98     base_url = "http://%s:%s/" % (MSB_SERVICE_IP, MSB_SERVICE_PORT)
  99     return call_req(base_url, "", "",
 100                     rest_no_auth, resource, method, content, headers)
 101
 102
 103 def combine_url(base_url, resource):
 104     full_url = None
 105     if base_url.endswith('/') and resource.startswith('/'):
 106         full_url = base_url[:-1] + resource
 107     elif base_url.endswith('/') and not resource.startswith('/'):
 108         full_url = base_url + resource
 109     elif not base_url.endswith('/') and resource.startswith('/'):
 110         full_url = base_url + resource
 111     else:
 112         full_url = base_url + '/' + resource
 113     return full_url