Enable platform independency

- Fail-safe import of (windows-only) dependecy requests_negotiate_sspi
- Optional dependency to requests_negotiate_sspi in setup.py only in
windows os

Fixes #127

TM1py/Services/RESTService.py

@@ -1,11 +1,17 @@
 # -*- coding: utf-8 -*-
 import functools
 import sys
+import warnings
 from base64 import b64encode, b64decode
 
 import requests
 from requests.adapters import HTTPAdapter
-from requests_negotiate_sspi import HttpNegotiateAuth
+
+# SSO not supported for Linux
+try:
+    from requests_negotiate_sspi import HttpNegotiateAuth
+except ImportError:
+    warnings.warn("requests_negotiate_sspi failed to import. SSO will not work", ImportWarning)
 
 from TM1py.Exceptions import TM1pyException
 
@@ -274,24 +280,33 @@ def _build_authorization_token(user, password, namespace=None, gateway=None, **k
         """ Build the Authorization Header for CAM and Native Security
         """
         if namespace:
-            if gateway:
-                response = requests.get(gateway, auth=HttpNegotiateAuth())
-                if not response.status_code == 200:
-                    raise RuntimeError(
-                        "Failed to authenticate through CAM. Expected status_code 200, received status_code: "
-                        + str(response.status_code))
-                elif 'cam_passport' not in response.cookies:
-                    raise RuntimeError(
-                        "Failed to authenticate through CAM. HTTP response does not contain 'cam_passport' cookie")
-                else:
-                    token = 'CAMPassport ' + response.cookies['cam_passport']
+            return RESTService._build_authorization_token_cam(user, password, namespace, gateway)
+        else:
+            return RESTService._build_authorization_token_basic(user, password)
+
+    @staticmethod
+    def _build_authorization_token_cam(user=None, password=None, namespace=None, gateway=None):
+        if gateway:
+            if not HttpNegotiateAuth:
+                raise RuntimeError(
+                    "SSO failed due to missing dependency requests_negotiate_sspi.HttpNegotiateAuth. "
+                    "SSO only supported for Windows")
+            response = requests.get(gateway, auth=HttpNegotiateAuth())
+            if not response.status_code == 200:
+                raise RuntimeError(
+                    "Failed to authenticate through CAM. Expected status_code 200, received status_code: "
+                    + str(response.status_code))
+            elif 'cam_passport' not in response.cookies:
+                raise RuntimeError(
+                    "Failed to authenticate through CAM. HTTP response does not contain 'cam_passport' cookie")
             else:
-                token = 'CAMNamespace ' + b64encode(
-                    str.encode("{}:{}:{}".format(user, password, namespace))).decode("ascii")
+                return 'CAMPassport ' + response.cookies['cam_passport']
         else:
-            token = 'Basic ' + b64encode(
-                str.encode("{}:{}".format(user, password))).decode("ascii")
-        return token
+            return 'CAMNamespace ' + b64encode(str.encode("{}:{}:{}".format(user, password, namespace))).decode("ascii")
+
+    @staticmethod
+    def _build_authorization_token_basic(user, password):
+        return 'Basic ' + b64encode(str.encode("{}:{}".format(user, password))).decode("ascii")
 
     @staticmethod
     def disable_http_warnings():

Tests/config.ini

@@ -1,11 +1,11 @@
-[tm1srv02]
+[tm1srv01]
 address=10.77.19.60
 port=12354
 user=Admin
 password=apple
 ssl=True
 
-[tm1srv01]
+[tm1srv02]
 address=10.77.19.60
 port=9699
 user=Admin

setup.py

@@ -2,7 +2,7 @@
 
 from setuptools import setup
 
-SCHEDULE_VERSION = '1.3.0'
+SCHEDULE_VERSION = '1.3.1'
 SCHEDULE_DOWNLOAD_URL = (
         'https://github.com/Cubewise-code/TM1py/tarball/' + SCHEDULE_VERSION
 )
@@ -35,6 +35,10 @@
         'Programming Language :: Python :: 3.6',
         'Natural Language :: English',
     ],
-    install_requires=['requests', 'pandas', 'pytz', 'requests_negotiate_sspi'],
+    install_requires=[
+        'requests',
+        'pandas',
+        'pytz',
+        'requests_negotiate_sspi;platform_system=="Windows"'],
     python_requires='>=3.5',
 )