```bash
~ python3
Python 3.7.0 (default, Oct 22 2018, 14:54:27)
[Clang 10.0.0 (clang-1000.11.45.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> r = requests.get('https://www.baidu.com')
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line
159, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/usr/local/lib/python3.7/site-packages/urllib3/util/connection.py",
line 80, in create_connection
raise err
File "/usr/local/lib/python3.7/site-packages/urllib3/util/connection.py",
line 70, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line
594, in urlopen
self._prepare_proxy(conn)
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line
805, in _prepare_proxy
conn.connect()
File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line
301, in connect
conn = self._new_conn()
File "/usr/local/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.VerifiedHTTPSConnection object at 0x10e3ce550>: Failed to
establish a new connection: [Errno 61] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/requests/adapters.py", line 449,
in send
timeout=timeout
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line
638, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/local/lib/python3.7/site-packages/urllib3/util/retry.py", line
398, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='www.baidu.com',
port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot
connect to proxy.',
NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at
0x10e3ce550>: Failed to establish a new connection: [Errno 61] Connection
refused')))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.7/site-packages/requests/api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/api.py", line 60, in
request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 533,
in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 646,
in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/adapters.py", line 510,
in send
raise ProxyError(e, request=request)
requests.exceptions.ProxyError: HTTPSConnectionPool(host='www.baidu.com',
port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot
connect to proxy.',
NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at
0x10e3ce550>: Failed to establish a new connection: [Errno 61] Connection
refused')))
```
Check the proxy
```bash
>>> print(requests.utils.get_environ_proxies('https://www.baidu.com'))
{'http': 'http://127.0.0.1:8888', 'https': 'http://127.0.0.1:8888'}
```
Check bash environment
```bash
~ set | grep proxy
```
Nothing output.
```bash
➜ ~ netstat -ant | grep 8888
tcp4 5 0 127.0.0.1.54437 127.0.0.1.8888 CLOSE_WAIT
tcp4 653 0 127.0.0.1.54436 127.0.0.1.8888 CLOSE_WAIT
tcp4 5 0 127.0.0.1.54434 127.0.0.1.8888 CLOSE_WAIT
```
```bash
➜ ~ lsof -i:8888
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
JavaAppli 77714 zerop 54u IPv6 0x975257a323b5690f 0t0 TCP
localhost:54434->localhost:ddi-tcp-1 (CLOSE_WAIT)
JavaAppli 77714 zerop 55u IPv6 0x975257a33daa290f 0t0 TCP
localhost:54436->localhost:ddi-tcp-1 (CLOSE_WAIT)
JavaAppli 77714 zerop 56u IPv6 0x975257a3366b600f 0t0 TCP
localhost:54437->localhost:ddi-tcp-1 (CLOSE_WAIT)
```
```bash
➜ ~ ps -ef | grep 77714
501 77714 1 0 11:17AM ?? 3:33.55 /Applications/Burp Suite
Community Edition.app/Contents/MacOS/JavaApplicationStub
501 84408 82855 0 5:54AM ttys002 0:00.00 grep --color=auto
--exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg
--exclude-dir=.svn 77714
```
Restart the application BurpSuite Community and then run the command `lsof
-i:8888`, nothing out
```bash
➜ ~ lsof -i:8888
```
Check `HTTP_SERVER` and `HTTP_PROXY`
```bash
➜ ~ echo $HTTP_SERVER
➜ ~ echo $HTTP_PROXY
➜ ~ echo $HTTPS_SERVER
```
Restart the computer and try to access Baidu as the following.
```bash
>>> r = requests.get('https://www.baidu.com')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'requests' is not defined
>>> import requests
>>> r = requests.get('https://www.baidu.com')
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line
159, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/usr/local/lib/python3.7/site-packages/urllib3/util/connection.py",
line 80, in create_connection
raise err
File "/usr/local/lib/python3.7/site-packages/urllib3/util/connection.py",
line 70, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 61] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line
594, in urlopen
self._prepare_proxy(conn)
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line
805, in _prepare_proxy
conn.connect()
File "/usr/local/lib/python3.7/site-packages/urllib3/connection.py", line
301, in connect
conn = self._new_conn()
File "/usr/local/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.VerifiedHTTPSConnection object at 0x102577160>: Failed to
establish a new connection: [Errno 61] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/requests/adapters.py", line 449,
in send
timeout=timeout
File "/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py", line
638, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/local/lib/python3.7/site-packages/urllib3/util/retry.py", line
398, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='www.baidu.com',
port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot
connect to proxy.',
NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at
0x102577160>: Failed to establish a new connection: [Errno 61] Connection
refused')))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.7/site-packages/requests/api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/api.py", line 60, in
request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 533,
in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/sessions.py", line 646,
in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python3.7/site-packages/requests/adapters.py", line 510,
in send
raise ProxyError(e, request=request)
requests.exceptions.ProxyError: HTTPSConnectionPool(host='www.baidu.com',
port=443): Max retries exceeded with url: / (Caused by ProxyError('Cannot
connect to proxy.',
NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at
0x102577160>: Failed to establish a new connection: [Errno 61] Connection
refused')))
```
And then check the default proxy with `urllib.request.getproxies()`
```bash
>>> import urllib
>>> print(urllib.getproxies())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: module 'urllib' has no attribute 'getproxies'
>>> print(urllib.request.getproxies())
{'http': 'http://127.0.0.1:8888', 'https': 'http://127.0.0.1:8888'}
```
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