Script Console cryptography for HttpNtlmAuth requests.get Import Error

Ignition
1

Struggling a bit trying to develop a HTTP get with domain authentication to work in Ignition. The end goal is to periodically read in a json from the API, parse out data, put it into a database for use by Ignition, and then post a modified file with some altered flags. After some research, I took a stab at using requests.get and HttpNtlmAuth from the requests_ntlm library. I used pip to install requests and requests_ntlm and their dependencies on my computer. I copied all the files from C:\Python27\Lib\site-packages to C:\Program Files\Inductive Automation\Ignition\user-lib\pylib, restarted the designer, and ran the following:

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image1441×814 232 KB

Note that individual requests.get and HttpNtlmAuth run without python errors.

It would seem like cryptography is missing a file, but that file appears to be present in my ignition cache (C:\Users[me].ignition\cache\gwlocalhost_8088\C0\pylib\site-packages\cryptography\hazmat\bindings top left), ignition site packages s (C:\Users[me].ignition\cache\gwlocalhost_8088\C0\pylib\site-packages\cryptography\hazmat\bindings top right), and my local python site packages at C:\Python27\Lib\site-packages\cryptography\hazmat\bindings (bottom).

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The code works from the python command line (content of result is as expected):

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image1435×435 83.9 KB

I already tried the following:

  1. Restarting designer
  2. Deleting the C:\Users[me].ignition\cache directory
  3. Editing and saving the C:\Users[me].ignition\cache\gwlocalhost_8088\C0\pylib\site-packages\cryptography\hazmat\bindings\openssl\binding.py file after adding a whitespace in a commented line.

Any suggestions for fixing this import error or developing an API call that works like the one in my python command line would be much appreciated.

2

.pyd files are basically DLLs, and these don't work on Jython.

I think that Ignition still ships with the Apache HTTP client library in all scopes... your best bet might be to convert some sample code for using this library to Python/Jython, e.g. rest - Http post requests unsing NTLM Authentication (java) - Stack Overflow

3

Thanks for the tip. Got something working. Here's a screenshot for posterity:

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4

Post code, not pictures of code. It helps with searching via text. Please see Wiki - how to post code on this forum. You can edit your post by clicking the pencil icon on the bottom right.

Edit: Code for those searching:

Original 
url = 'MY URL'
un = 'MY USERNAME'
do = 'MY DOMAIN'
pwd = 'MY PASSWORD'


# Import
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.NTCredentials;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.client.methods.HttpGet
import org.apache.http.util.EntityUtils


credProv	= org.apache.http.impl.client.BasicCredentialsProvider()	# Build credentials provider
ntCred		= org.apache.http.auth.NTCredentials(un, pwd, '', do)		# Build NT domain credentials
credProv.setCredentials(org.apache.http.auth.AuthScope.ANY, ntCred);	# Set credentials
bld 		= org.apache.http.impl.client.HttpClientBuilder.create()	# Create HttpClientBuilder
client		= bld.setDefaultCredentialsProvider(credProv).build()		# Build client with credential proxy

get 		= org.apache.http.Client.methods.HttpGet(url)	# Define http get
res			= client.execute(get)							# Execute get

# Result string
ress		= str(org.apache.http.util.EntityUtils.toString(res.getEntity(), 'UTF-8'))
Slimmed 
from org.apache.http.auth import AuthScope, NTCredentials
from org.apache.http.impl.client import BasicCredentialsProvider, HttpClientBuilder
from org.apache.http.client.methods import HttpGet
from org.apache.http.util import EntityUtils

url = 'MY URL'
un = 'MY USERNAME'
do = 'MY DOMAIN'
pwd = 'MY PASSWORD'


credProv	= BasicCredentialsProvider()		# Build credentials provider
ntCred		= NTCredentials(un, pwd, '', do)	# Build NT domain credentials
credProv.setCredentials(AuthScope.ANY, ntCred);	# Set credentials

bld 		= HttpClientBuilder.create()							# Create HttpClientBuilder
client		= bld.setDefaultCredentialsProvider(credProv).build()	# Build client with credential proxy

get 		= HttpGet(url)			# Define http get
res			= client.execute(get)	# Execute get

# Result string
ress		= str(EntityUtils.toString(res.getEntity(), 'UTF-8'))
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