Python 2.7.6: _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>

[sanderjo]

FYI / FWIW:

On Ubuntu 14.04.5 LTS (with Python 2.7.6) the example.py does not work. See below.

The error

urllib2.URLError: <urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>

is a common problem with older python versions in combination with TLS and possibly SNI (Server Name Indication). So far I have not found a solution or workaround within python 2.7.6.
With python 2.7.11 it works fine.

It's easy to reproduce with three lines of code:

$ python
Python 2.7.6 (default, Oct 26 2016, 20:32:47)
[GCC 4.8.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import urllib2
>>> req = urllib2.Request("https://postcode-api.apiwise.nl/")
>>> resp = urllib2.urlopen(req)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1222, in https_open
    return self.do_open(httplib.HTTPSConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>

Output of example.py with Python 2.7.6:

sander@haring:~/postcode-API/git_postcodeapi$ python example.py
ERROR:root:<urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>
Traceback (most recent call last):
  File "/home/sander/postcode-API/git_postcodeapi/pyPostcode/__init__.py", line 99, in getaddress
    data = self.request(path)
  File "/home/sander/postcode-API/git_postcodeapi/pyPostcode/__init__.py", line 65, in request
    self.url + path, headers=headers,
  File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1222, in https_open
    return self.do_open(httplib.HTTPSConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>
ERROR:root:<urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>
Traceback (most recent call last):
  File "/home/sander/postcode-API/git_postcodeapi/pyPostcode/__init__.py", line 99, in getaddress
    data = self.request(path)
  File "/home/sander/postcode-API/git_postcodeapi/pyPostcode/__init__.py", line 65, in request
    self.url + path, headers=headers,
  File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1222, in https_open
    return self.do_open(httplib.HTTPSConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure>
Traceback (most recent call last):
  File "example.py", line 7, in <module>
    print result.street
AttributeError: 'bool' object has no attribute 'street'

With python 2.7.11 it works fine:

sander@haring:~/postcode-API/git_postcodeapi$ /opt/python2711/bin/python example.py
De Ruijterkade
125
1011AC
Amsterdam
Amsterdam
Noord-Holland
52.3776421
4.9066958
122281
487861
De Ruijterkade
154
1011AC
Amsterdam
Amsterdam
Noord-Holland
52.3772667
4.9094314
122467
487818

[steffex]

I've tested it with 2.7.10, this version also seems to work fine.
I'll try to find a workaround for this issue.

@sanderjo It looks like the issue is part of the ssl module shipped with 2.7.6.
I think that there is no other option than to upgrade your python to 2.7.1X

[sanderjo]

I've tested it with 2.7.10, this version also seems to work fine.

Yes, python 2.7.9+ works: "Python3 and Python 2.7.9+ include native support for SNI in their SSL modules."

I think that there is no other option than to upgrade your python to 2.7.1X

I think so too. Maybe mention it as requirement in the documentation? And build in a try/except on this specific error message?

[ChintanModi]

Hello.
First of all, Thank You. This is very helpful.

I am using this with ODOO10 and i don't know how i can get address for P4 format postcode.

i tried entering P4 format post code and house number but no luck.

Thank You in anticipation for guidance.

[steffex]

@ChintanModi just use the getaddress method and leave out the housenumber.

for examle:

#!/usr/bin/python

from pyPostcode import Api

postcodeapi = Api('{YOUR_API_KEY}') # Set your own API-key
result = postcodeapi.getaddress('1011AC')
print result.street, result.town

[ChintanModi]

@steffex , yes i tried that but what i want is say for example postcode is 7766 and if i put this in
getaddress this won't work.

from pyPostcode import Api

postcodeapi = Api('{YOUR_API_KEY}') # Set your own API-key
result = postcodeapi.getaddress('7766')

for this it will show me wrong query parameter error.

[sanderjo]

yes i tried that but what i want is say for example postcode is 7766 and if i put this in
getaddress this won't work.

"7766" is not a Dutch postcode. A valid Dutch postcode is "7766AA": alway 4 numbers + 2 letters.

[ChintanModi]

@sanderjo Okay. i got it now. i searched postcode to try with the getaddress and i found 7766 only so i tried this and it was a wrong postcode. i guess i will always have postcode in the format like the one you said.

Thank You. @sanderjo and @steffex .

[sanderjo]

I will close this. I don't know whether it's solved or not. If not solved, just use python 2.7.9 or higher.