我喜欢用R中的rrdf或SPARQL包来探索我的三重商店的内容。我相信他们会使用cURL。除端点地址和查询本身外，它们还可以采用其他参数。
以下是GraphDB关于基于cURL的查询的说明：http://graphdb.ontotext.com/documentation/standard/quick-start-guide.html#query-data-programmatically
我可以发誓我过去曾经从R连接到一些受密码保护的Triplestore，但我不记得我是怎么做到的。它可能是Stardog或Blazegraph。
我将通过VPN连接。我希望我可以放宽关于不在纯文本URL中嵌入敏感数据（如密码）的通常规则。
答案 0 :(得分：0)
来自RCurl: HTTP Authentication When Site Responds With HTTP 401 Code Without WWW-Authenticate：
密钥是将身份验证类型（$ python client.py
Traceback (most recent call last):
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/connection.py", line 159, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/util/connection.py", line 80, in create_connection
raise err
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/util/connection.py", line 70, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/connectionpool.py", line 600, in urlopen
chunked=chunked)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/http/client.py", line 1229, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/http/client.py", line 1275, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/http/client.py", line 1224, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/http/client.py", line 1016, in _send_output
self.send(msg)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/http/client.py", line 956, in send
self.connect()
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/connection.py", line 181, in connect
conn = self._new_conn()
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/connection.py", line 168, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7fd0c7a26a58>: Failed to establish a new connection: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/connectionpool.py", line 638, in urlopen
_stacktrace=sys.exc_info()[2])
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/urllib3/util/retry.py", line 399, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=5000): Max retries exceeded with url: /data (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fd0c7a26a58>: Failed to establish a new connection: [Errno 111] Connection refused'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "client.py", line 17, in <module>
main()
File "client.py", line 13, in main
send([1, 2, 3, 4])
File "client.py", line 7, in send
response = requests.post("http://localhost:5000/data", json={"data": data})
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/requests/api.py", line 116, in post
return request('post', url, data=data, json=json, **kwargs)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/requests/api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/home/bruno/anaconda3/envs/statsapi/lib/python3.7/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=5000): Max retries exceeded with url: /data (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fd0c7a26a58>: Failed to establish a new connection: [Errno 111] Connection refused'))
指定为要传递给rCURL的位图选项（httpauth）。
1L