SPARQLWrapper HTTP Error 401: Unauthorized

问题

I secured my SPARQL endpoint via SQL Accounts according to VirtSPARQLProtectSQLDigestAuthentication.

Before this operation, I can get the data through the code:

from SPARQLWrapper import SPARQLWrapper, JSON, DIGEST   

sparql = SPARQLWrapper("http://example.org/sparql")
sparql.setQuery("...") 
sparql.setReturnFormat(JSON)
results = sparql.query().convert()

And after that, I use the DIGEST way to get the data,

from SPARQLWrapper import SPARQLWrapper, JSON, DIGEST

sparql = SPARQLWrapper("http://example.org/sparql")

sparql.setHTTPAuth(DIGEST)
sparql.setCredentials('login', 'password')

sparql.setQuery("...")
sparql.setReturnFormat(JSON)

results = sparql.query().convert()

, Error 401 occured:

Traceback (most recent call last): File "1.py", line 21, in results = sparql.query().convert() File "/usr/local/lib/python2.7/site-packages/SPARQLWrapper/Wrapper.py", line 601, in query return QueryResult(self._query()) File "/usr/local/lib/python2.7/site-packages/SPARQLWrapper/Wrapper.py", line 581, in _query raise e urllib2.HTTPError: HTTP Error 401: Unauthorized

Anything wrong with my operations? The username and password are both correct.

Appreciate that if anyone can help.

回答1:

Well, I found the answer just several minutes after I wrote the problem, which reminds me of RTFSC again.

line 574~581 in Wrapper.py :

elif self.http_auth == DIGEST:
    realm = "SPARQL"
    pwd_mgr = urllib2.HTTPPasswordMgr()
    pwd_mgr.add_password(realm, uri, self.user, self.passwd)
    opener = urllib2.build_opener()
    opener.add_handler(urllib2.HTTPDigestAuthHandler(pwd_mgr))
    urllib2.install_opener(opener)

Besides user and password, there is another varible,realm.(default value is "SPARQL"), but VirtSPARQLProtectSQLDigestAuthentication set the realm as "SPARQL Endpoint".

So the solution is just changing your virtuoso's realm to "SPARQL".

来源：https://stackoverflow.com/questions/44254935/sparqlwrapper-http-error-401-unauthorized