get_record_list: use _get_url in place of requests.get.

Note that this will handle errors (e.g. a file that we are not
authorized to access) and raise an exception, rather than trying to
parse the error document.  Previously, 404 errors were handled, but
other types of errors were not.

Author: Benjamin Moody

wfdb/io/download.py

@@ -300,12 +300,13 @@ def get_record_list(db_dir, records='all'):
 
     # Check for a RECORDS file
     if records == 'all':
-        response = requests.get(posixpath.join(db_url, 'RECORDS'))
-        if response.status_code == 404:
+        try:
+            content = _get_url(posixpath.join(db_url, 'RECORDS'))
+        except FileNotFoundError:
             raise ValueError('The database %s has no WFDB files to download' % db_url)
 
         # Get each line as a string
-        record_list = response.content.decode('ascii').splitlines()
+        record_list = content.decode('ascii').splitlines()
     # Otherwise the records are input manually
     else:
         record_list = records