[jira] [Created] (CLIMATE-611) SSL certificate verify error

["Huikyo Lee (JIRA)" <ji...@apache.org>]

Huikyo Lee created CLIMATE-611:
----------------------------------

             Summary: SSL certificate verify error
                 Key: CLIMATE-611
                 URL: https://issues.apache.org/jira/browse/CLIMATE-611
             Project: Apache Open Climate Workbench
          Issue Type: Task
          Components: data sources
    Affects Versions: 0.5
            Reporter: Huikyo Lee
            Assignee: Maziyar Boustani
             Fix For: 0.5


Error messages below while running example/knmi_to_cru31_full_bias.py.

#########################################################
Working with the rcmed interface to get CRU3.1 Daily-Max Temp
Traceback (most recent call last):
  File "knmi_to_cru31_full_bias.py", line 54, in <module>
    metadata = rcmed.get_parameters_metadata()
  File "/net/san-a1-ib/data/keeling/a/atmos-kyo/climate/ocw/data_source/rcmed.py", line 45, in get_parameters_metadata
    string = urllib2.urlopen(url)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 437, in open
    response = meth(req, response)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 550, in http_response
    'http', request, response, code, msg, hdrs)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 469, in error
    result = self._call_chain(*args)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 656, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 431, in open
    response = self._open(req, data)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 449, in _open
    '_open', req)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 1240, in https_open
    context=self._context)
  File "/data/keeling/a/atmos-kyo/RCMES/anaconda/lib/python2.7/urllib2.py", line 1197, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)>
#########################################################

This was resolved temporarily by adding ssl context.
The following shows git diff.
#########################################################
diff --git a/ocw/data_source/rcmed.py b/ocw/data_source/rcmed.py
index baeb326..b1ef963 100644
--- a/ocw/data_source/rcmed.py
+++ b/ocw/data_source/rcmed.py
@@ -21,6 +21,7 @@ Classes:
 '''

 import urllib, urllib2
+import ssl
 import re
 import json
 import numpy as np
@@ -42,7 +43,7 @@ def get_parameters_metadata():

     param_info_list = []
     url = URL + "&param_info=yes"
-    string = urllib2.urlopen(url)
+    string = urllib2.urlopen(url, context=ssl._create_unverified_context())
     data_string = string.read()
     json_format_data = json.loads(data_string)
     fields_name = json_format_data['fields_name']
@@ -159,7 +160,7 @@ def _get_data(url):
     :rtype: (Numpy array, Numpy array, Numpy array, Numpy array)
     '''

-    string = urllib2.urlopen(url)
+    string = urllib2.urlopen(url, context=ssl._create_unverified_context())

#################################################

Is this a problem of "keeling.atmos.uiuc.edu"? Is it worth to add context whenever OCW uses 'urlopen'?




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