urllib and “SSL: CERTIFICATE_VERIFY_FAILED” Error

If you just want to bypass verification, you can create a new SSLContext. By default newly created contexts use CERT_NONE.

Be careful with this as stated in section 17.3.7.2.1

When calling the SSLContext constructor directly, CERT_NONE is the default. Since it does not authenticate the other peer, it can be insecure, especially in client mode where most of time you would like to ensure the authenticity of the server you’re talking to. Therefore, when in client mode, it is highly recommended to use CERT_REQUIRED.

But if you just want it to work now for some other reason you can do the following, you’ll have to import ssl as well:

input = input.replace("!web ", "")      
url = "https://domainsearch.p.mashape.com/index.php?name=" + input
req = urllib2.Request(url, headers={ 'X-Mashape-Key': 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX' })
gcontext = ssl.SSLContext()  # Only for gangstars
info = urllib2.urlopen(req, context=gcontext).read()
Message.Chat.SendMessage ("" + info)

This should get round your problem but you’re not really solving any of the issues, but you won’t see the [SSL: CERTIFICATE_VERIFY_FAILED] because you now aren’t verifying the cert!

To add to the above, if you want to know more about why you are seeing these issues you will want to have a look at PEP 476.

This PEP proposes to enable verification of X509 certificate signatures, as well as hostname verification for Python’s HTTP clients by default, subject to opt-out on a per-call basis. This change would be applied to Python 2.7, Python 3.4, and Python 3.5.

There is an advised opt out which isn’t dissimilar to my advice above:

import ssl

# This restores the same behavior as before.
context = ssl._create_unverified_context()
urllib.urlopen("https://no-valid-cert", context=context)

It also features a highly discouraged option via monkeypatching which you don’t often see in python:

import ssl

ssl._create_default_https_context = ssl._create_unverified_context

Which overrides the default function for context creation with the function to create an unverified context.

Please note with this as stated in the PEP:

This guidance is aimed primarily at system administrators that wish to adopt newer versions of Python that implement this PEP in legacy environments that do not yet support certificate verification on HTTPS connections. For example, an administrator may opt out by adding the monkeypatch above to sitecustomize.py in their Standard Operating Environment for Python. Applications and libraries SHOULD NOT be making this change process wide (except perhaps in response to a system administrator controlled configuration setting).

If you want to read a paper on why not validating certs is bad in software you can find it here!

Related Posts:

  1. Python requests SSL error – certificate verify failed
  2. TypeError: ‘int’ object is not subscriptable
  3. TypeError: ‘int’ object is not callable
  4. TypeError: ‘int’ object is not callable
  5. TypeError: ‘int’ object is not callable
  6. Cannot find module cv2 when using OpenCV
  7. Cannot find module cv2 when using OpenCV
  8. Python ‘If not’ syntax [duplicate]
  9. RuntimeWarning: invalid value encountered in divide
  10. Converting dictionary to JSON
  11. WinError 2 The system cannot find the file specified (Python)
  12. IndexError: tuple index out of range —– Python
  13. sklearn error ValueError: Input contains NaN, infinity or a value too large for dtype(‘float64’)
  14. Could not find a version that satisfies the requirement tensorflow
  15. sklearn error ValueError: Input contains NaN, infinity or a value too large for dtype(‘float64’)
  16. Could not find a version that satisfies the requirement tensorflow
  17. Local variable referenced before assignment?
  18. ln (Natural Log) in Python
  19. AttributeError: ‘module’ object has no attribute ‘urlopen’
  20. How to download a file over HTTP?
  21. Python Traceback (most recent call last)
  22. Unable to plot Double Bar, Bar plot using pyplot for ndarray
  23. How to pip or easy_install tkinter on Windows
  24. AttributeError: module ‘urllib3’ has no attribute ‘urlopen’ in python
  25. How to download a file over HTTP?
  26. Cannot find module cv2 when using OpenCV
  27. Convert list to tuple in Python
  28. What is the meaning of [:] in python [duplicate]
  29. Why are Python’s ‘private’ methods not actually private?
  30. Remove list from list in Python
  31. How to create a new text file using Python
  32. TypeError: write() argument must be str, not bytes (Python 3 vs Python 2 )
  33. How to import files in python using sys.path.append?
  34. How do I install the yaml package for Python?
  35. Check string “None” or “not” in Python 2.7
  36. Change figure size and figure format in matplotlib
  37. how to update spyder on anaconda
  38. how does \r (carriage return) work in Python
  39. What is Python buffer type for?
  40. AttributeError(“‘str’ object has no attribute ‘read'”)
  41. IndexError: index 1 is out of bounds for axis 0 with size 1/ForwardEuler
  42. Python Save to file
  43. Create 3D array using Python
  44. TypeError: unsupported operand type(s) for -: ‘list’ and ‘list’
  45. ImportError: No module named scipy
  46. AttributeError: ‘datetime’ module has no attribute ‘strptime’
  47. Python add item to the tuple
  48. Converting binary to decimal integer output
  49. How can I read pdf in python?
  50. No module named setuptools
  51. installing urllib in Python3.6
  52. How to use 2to3 properly for python?
  53. How to fix: “UnicodeDecodeError: ‘ascii’ codec can’t decode byte”
  54. Python – ‘ascii’ codec can’t decode byte
  55. Difference between scikit-learn and sklearn
  56. How to detect key presses?
  57. SSL error : routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
  58. What is the difference between json.load() and json.loads() functions
  59. How to XOR two strings in Python
  60. TypeError: ‘_io.TextIOWrapper’ object is not subscriptable
  61. Copy a list of list by value and not reference
  62. Why I get ‘list’ object has no attribute ‘items’?
  63. Python 101: Can’t open file: No such file or directory
  64. Split a python list into other “sublists” i.e smaller lists
  65. TypeError: argument of type ‘NoneType’ is not iterable
  66. scrapy run spider from script
  67. python error: TypeError: an integer is required
  68. UnicodeEncodeError: ‘charmap’ codec can’t encode characters
  69. If list index exists, do X
  70. Python Requests – No connection adapters
  71. How to detect key presses?
  72. Numpy, multiply array with scalar
  73. Installation of pygame with Anaconda
  74. Python 3.5.1 urllib has no attribute request
  75. Python: urllib.error.HTTPError: HTTP Error 404: Not Found
  76. ‘virtualenv’ is not recognized as an internal or external command, operable program or batch file
  77. How can I copy a Python string?
  78. TypeError: super() takes at least 1 argument (0 given) error is specific to any python version?
  79. Split string using a newline delimiter with Python
  80. No module named urllib3
  81. can we use XPath with BeautifulSoup?
  82. AttributeError: ‘tuple’ object has no attribute
  83. What is the meaning of “int(a[::-1])” in Python?
  84. Adding +1 to a variable inside a function
  85. How to completely uninstall python 2.7.13 on Ubuntu 16.04
  86. Spell Checker for Python
  87. How to open html file?
  88. “Python version 2.7 required, which was not found in the registry” error when attempting to install netCDF4 on Windows 8
  89. Install py2exe for python 2.7 over pip: this package requires Python 3.3 or later
  90. ImportError: No module named IPython
  91. Does python have header files like C/C++?
  92. Making a POST call instead of GET using urllib2
  93. In python, how can I print lines that do NOT contain a certain string, rather than print lines which DO contain a certain string:
  94. input() error – NameError: name ‘…’ is not defined
  95. Symbol not found: __PyCodecInfo_GetIncrementalDecoder
  96. Python 2.7 mixing iteration and read methods would lose data
  97. Homebrew brew doctor warning about /Library/Frameworks/Python.framework, even with brew’s Python installed
  98. What does an ‘r’ represent before a string in python?
  99. Python list index out of range on return value of split
  100. Python: OSError: [Errno 2] No such file or directory: ”

Leave a Comment