def perform_romeo_query(search_terms):
search_terms = search_terms.copy()
if ROMEO_API_KEY:
search_terms['ak'] = ROMEO_API_KEY
base_url = 'http://'+ROMEO_API_DOMAIN+'/romeo/api29.php'
# Perform the query
try:
response = urlopen_retry(base_url, data=search_terms).encode('utf-8')
except requests.exceptions.RequestException as e:
raise MetadataSourceException('Error while querying RoMEO.\n'+
'URL was: '+base_url+'\n'+
'Parameters were: '+str(search_terms)+'\n'+
'Error is: '+str(e))
# Parse it
try:
parser = ET.XMLParser(encoding='utf-8')
root = ET.parse(BytesIO(response), parser)
except ET.ParseError as e:
with open('/tmp/romeo_response.xml', 'w') as f:
f.write(response)
f.write('\n')
raise MetadataSourceException('RoMEO returned an invalid XML response, dumped at /tmp/romeo_response.xml\n'+
'URL was: '+base_url+'\n'+
'Parameters were: '+str(search_terms)+'\n'+
'Error is: '+str(e))
return root
def perform_romeo_query(search_terms):
search_terms = search_terms.copy()
if ROMEO_API_KEY:
search_terms['ak'] = ROMEO_API_KEY
base_url = 'http://' + ROMEO_API_DOMAIN + '/romeo/api29.php'
# Perform the query
try:
response = urlopen_retry(base_url, data=search_terms).encode('utf-8')
except requests.exceptions.RequestException as e:
raise MetadataSourceException('Error while querying RoMEO.\n' +
'URL was: ' + base_url + '\n' +
'Parameters were: ' + str(search_terms) +
'\n' + 'Error is: ' + str(e))
# Parse it
try:
parser = ET.XMLParser(encoding='utf-8')
root = ET.parse(BytesIO(response), parser)
except ET.ParseError as e:
with open('/tmp/romeo_response.xml', 'w') as f:
f.write(response)
f.write('\n')
raise MetadataSourceException(
'RoMEO returned an invalid XML response, dumped at /tmp/romeo_response.xml\n'
+ 'URL was: ' + base_url + '\n' + 'Parameters were: ' +
str(search_terms) + '\n' + 'Error is: ' + str(e))
return root
def fetch_metadata_by_DOI(doi):
"""
Fetch the metadata for a single DOI.
This is supported by the standard proxy, doi.org,
as well as more advanced proxies such as doi_cache
"""
if doi is None:
return
addheaders = {'Accept': 'application/citeproc+json'}
try:
request = 'http://'+DOI_PROXY_DOMAIN+'/'+doi
response = urlopen_retry(request,
timeout=crossref_timeout,
headers=addheaders,
retries=0)
parsed = json.loads(response)
return parsed
except ValueError as e:
raise MetadataSourceException('Error while fetching DOI metadata:\nInvalid JSON response.\n' +
'Error: '+str(e))
def fetch_metadata_by_DOI(doi):
"""
Fetch the metadata for a single DOI.
This is supported by the standard proxy, doi.org,
as well as more advanced proxies such as doi_cache
"""
if doi is None:
return
addheaders = {'Accept': 'application/citeproc+json'}
try:
request = 'http://'+settings.DOI_PROXY_DOMAIN+'/'+doi
response = urlopen_retry(request,
timeout=crossref_timeout,
headers=addheaders,
retries=0)
parsed = json.loads(response)
return parsed
except ValueError as e:
raise MetadataSourceException('Error while fetching DOI metadata:\nInvalid JSON response.\n' +
'Error: '+str(e))