change URL for atomic and improve error messaging

Author: keflavich

astroquery/atomic/__init__.py

@@ -77,7 +77,7 @@ class Conf(_config.ConfigNamespace):
     Configuration parameters for `astroquery.atomic`.
     """
     url = _config.ConfigItem(
-        'https://www.pa.uky.edu/~peter/atomic/',
+        'https://linelist.pa.uky.edu/atomic/',
         'Atomic Line List URL')
 
     timeout = _config.ConfigItem(

astroquery/atomic/core.py

@@ -248,6 +248,10 @@ def query_object_async(self, *, wavelength_range=None, wavelength_type='', wavel
         return response
 
     def _parse_result(self, response):
+
+        if 'ERROR: request form contains no information' in response.text:
+            raise ValueError(f"The server returned an error.  Please check the URL.   The full error message is {response.text}")
+
         data = StringIO(BeautifulSoup(response.text, features='html5lib').find('pre').text.strip())
         # `header` is e.g.:
         # "u'-LAMBDA-VAC-ANG-|-SPECTRUM--|TT|--------TERM---------|---J-J---|----LEVEL-ENERGY--CM-1----'"
@@ -299,6 +303,7 @@ def _submit_form(self, input_data=None, cache=True):
         log.debug(f"final payload = {payload} from url={url}")
         response = self._request("POST", url=url, data=payload,
                                  timeout=self.TIMEOUT, cache=cache)
+        response.raise_for_status()
         log.debug("Retrieved data from POST request")
         return response