Merge pull request #11 from dyninc/compat-update

Compat Update and Much, Much More!

Author: moogar0880

.gitignore

@@ -32,4 +32,7 @@ nosetests.xml
 # Mr Developer
 .mr.developer.cfg
 .project
-.pydevproject
+.pydevproject
+
+# PyCharm
+.idea/

HISTORY.rst

@@ -1,5 +1,17 @@
 Release History
 ---------------
+1.1.0 (2014-09-16)
+++++++++++++++++++
+
+* Internally improved Python2/3 compaability with the intoduction of the dyn.compat module
+* Timestamps for various report types are accepted as Python datetime.datetime instances
+* Added qps report access to Zones
+* Added __str__, __repr__, __unicode__, and __bytes__ methods to all API object types
+* Added conditional password encryption to allow for better in-app security
+* Added the ability for users to specify their own password encryption keys
+* Added __getstate__ and __setstate__ methods to SessionEngine, allowing sessions to be serialized
+* Misc bug fixes
+
 1.0.3 (2014-09-05)
 ++++++++++++++++++
 
@@ -9,7 +21,7 @@ Release History
 ++++++++++++++++++
 
 * Added reports module
-* Updated installation documentation.
+* Updated installation documentation
 
 1.0.1 (2014-08-06)
 ++++++++++++++++++

README.rst

@@ -7,3 +7,30 @@ services.
 Requires Python 2.6 or higher, or the "simplejson" package.
 
 For full documentation and examples see the dyn module on `Read The Docs <http://dyn.readthedocs.org>`_.
+
+Installation
+------------
+
+To install the dyn SDK, simply:
+
+.. code-block:: bash
+
+    $ pip install dyn
+
+
+Documentation
+-------------
+
+Documentation is available on `Read The Docs`_
+
+Contribute
+----------
+
+#. Check for open issues or open a new issue to start a discussion around a feature idea or a bug.
+#. For bug reports especially it's encouraged for you to include a code snippet highlighting the bug.
+#. For feature requests it's encouraged for you to include sample code highlighting a use case for the new feature.
+#. Fork `the repository`_ on GitHub to start making your changes to the **master** branch (or branch off of it).
+#. Send a pull request and bug the maintainer until it gets merged and published. :)
+
+.. _`the repository`: http://github.com/dyninc/dyn-python
+.. _`Read The Docs`: http://dyn.readthedocs.org>

docs/sessions.rst renamed to docs/advanced.rst

@@ -1,7 +1,13 @@
 .. _sessions:
 
-Advanced Sessions Overview
-==========================
+Advanced Topics
+===============
+This Section serves as a collective for advanced topics that most developers
+using this library will never need to know about, but that may be useful for
+developers who are destined to maintain this package
+
+Sessions
+--------
 
 The way in which sessions are handled in this library are designed to be super
 easy to use for developers who use this library, however, have become relatively
@@ -10,15 +16,15 @@ mainly for developers who would like to contribute to this code base, or who are
 just curious as to what is actually going on under the hood.
 
 Parent Class
-------------
+^^^^^^^^^^^^
 Both :class:`dyn.tm.session.DynectSession` and :class:`dyn.mm.session.MMSession`
 are subclasses of :class:`dyn.core.SessionEngine`. The :class:`dyn.core.SessionEngine`
 provides an easy to use internal API for preparing, sending, and processing outbound
 API calls. This class was added in v1.0.0 and greatly reduced the amount of logic
 and duplicated code that made looking at these sessions so overly complex.
 
 Parent Type
------------
+^^^^^^^^^^^
 Since v0.4.0 sessions had always been implemented as a Singleton type. At this point
 you're probably asing "Why?" And that's a bit of a complicated question. One of the main
 reasons that these sessions were implemented as a Singleton was to make it easier for
@@ -120,3 +126,39 @@ other instances, since those instances are tied to the classes themselves instea
 of held in the *globals* of the session modules. In addition this allows users
 to have multiple active sessions across multiple threads, which was previously
 impossible in the prior implementation.
+
+
+Password Encryption
+-------------------
+The DynECT REST API only accepts passwords in plain text, and currently there is
+no way around that. However, for those of you that are particularly mindful of
+security (and even those of you who aren't) can probably see some serious pitfalls
+to this. As far as most users of this library are concerned the passwords stored in
+their :class:`~dyn.tm.session.DynectSession` objects will only ever live in memory,
+so it's really not a huge deal that their passwords are stored in plain text. However,
+for users looking to do more advanced things, such as serialize and store their session
+objects in something less secure, such as a database, then these plain text passwords
+are far less than ideal. Because of this in version 1.1.0 we've added optional
+AES-256 password encryption for all :class:`~dyn.tm.session.DynectSession`
+instances. All you need to do to enable password encryption is install
+`PyCrypto <http://www.dlitz.net/software/pycrypto/>`_. The rest will happen
+automatically.
+
+Key Generation
+^^^^^^^^^^^^^^
+Also in version 1.1.0 an optional key field parameter was added to the
+:class:`~dyn.tm.session.DynectSession` __init__ method. This field will allow
+you to specify the key that your password will be encrypted using. However,
+you may also choose to let the dyn module handle the key generation for you as
+well using the :func:`~dyn.encrypt.generate_key` function which generates a,
+nearly, random 50 character key that can be easily consumed by the
+:class:`~dyn.encrypt.AESCipher` class (the class responsible for performing
+the actual encryption and decryption.
+
+Encrypt Module
+^^^^^^^^^^^^^^
+.. autofunction:: dyn.encrypt.generate_key
+
+.. autoclass:: dyn.encrypt.AESCipher
+    :members:
+    :undoc-members:

docs/index.rst

@@ -37,7 +37,7 @@ Contents:
    quickstart
    tm
    mm
-   sessions
+   advanced
 
 
 Indices and tables

docs/tm/reports.rst

@@ -14,4 +14,3 @@ List Functions
 .. autofunction:: dyn.tm.reports.get_rttm_rrset
 .. autofunction:: dyn.tm.reports.get_qps
 .. autofunction:: dyn.tm.reports.get_zone_notes
-

docs/tm/services/gslb/gslb.rst

@@ -66,3 +66,23 @@ the dyn.tm System and how to edit some of the same fields mentioned above.
     >>> fqdn = zone + '.'
     >>> gslb = GSLB(zone, fqdn)
 
+Replacing a GSLB Monitor
+^^^^^^^^^^^^^^^^^^^^^^^^
+If you'd like to create a brand new :class:`Monitor` for your GSLB service, rather
+than update your existing one, the following example shows how simple it is to
+accomplish this task
+::
+
+    >>> from dyn.tm.services.gslb import GSLB, Monitor
+    >>> zone = 'example.com'
+    >>> fqdn = zone + '.'
+    >>> gslb = GSLB(zone, fqdn)
+    >>> gslb.monitor.protocol
+    'HTTP'
+    >>> expected_text = "This is the text you're looking for."
+    >>> new_monitor = Monitor('HTTPS', 10, timeout=500, port=5005,
+                              expected=expected_text)
+    >>> gslb.monitor = new_monitor
+    >>> gslb.monitor.protocol
+    'HTTPS'
+

dyn/__init__.py

@@ -5,7 +5,7 @@
 
 Requires Python 2.6 or higher, or the "simplejson" package.
 """
-version_info = (1, 0, 3)
+version_info = (1, 1, 0)
 __name__       = 'dyn'
 __doc__        = 'A python wrapper for the DynDNS and DynEmail APIs'
 __author__     = 'Jonathan Nappi, Cole Tuininga'

dyn/compat.py

@@ -0,0 +1,66 @@
+# -*- coding: utf-8 -*-
+"""python 2-3 compatability layer. The bulk of this was borrowed from
+kennethreitz's requests module
+"""
+import sys
+
+# -------
+# Pythons
+# -------
+
+# Syntax sugar.
+_ver = sys.version_info
+
+#: Python 2.x?
+is_py2 = (_ver[0] == 2)
+
+#: Python 3.x?
+is_py3 = (_ver[0] == 3)
+
+# -----------------
+# Version Specifics
+# -----------------
+
+if is_py2:
+    # If we have no JSON-esque module installed, we can't do anything
+    try:
+        import json
+    except ImportError as ex:
+        try:
+            import simplejson as json
+        except ImportError:
+            raise ex
+    from httplib import HTTPConnection, HTTPSConnection, HTTPException
+    from urllib import urlencode, pathname2url
+
+    string_types = (str, unicode)
+
+    def prepare_to_send(args):
+        return bytes(args)
+
+    def prepare_for_loads(body, encoding):
+        return body
+
+    def force_unicode(s, encoding='UTF-8'):
+        try:
+            s = unicode(s)
+        except UnicodeDecodeError:
+            s = str(s).decode(encoding, 'replace')
+
+        return s
+
+elif is_py3:
+    from http.client import HTTPConnection, HTTPSConnection, HTTPException
+    from urllib.parse import urlencode
+    from urllib.request import pathname2url
+    import json
+    string_types = (str,)
+
+    def prepare_to_send(args):
+        return bytes(args, 'UTF-8')
+
+    def prepare_for_loads(body, encoding):
+        return body.decode(encoding)
+
+    def force_unicode(s, encoding='UTF-8'):
+        return str(s)

dyn/core.py

@@ -4,25 +4,15 @@
 library, it is not recommened and could possible result in some strange
 behavior.
 """
-import sys
 import time
 import locale
 import logging
 import threading
 from datetime import datetime
-try:
-    import json
-except ImportError:
-    try:
-        import simplejson as json
-    except ImportError:
-        sys.exit('Could not find json or simplejson libraries.')
-if sys.version_info[0] == 2:
-    from httplib import HTTPConnection, HTTPSConnection, HTTPException
-elif sys.version_info[0] == 3:
-    from http.client import HTTPConnection, HTTPSConnection, HTTPException
-# API Libs
-from dyn import __version__
+
+from . import __version__
+from .compat import (HTTPConnection, HTTPSConnection, HTTPException, json,
+                     is_py2, is_py3, prepare_to_send, force_unicode)
 
 
 def cleared_class_dict(dict_obj):
@@ -107,7 +97,7 @@ def close_session(cls):
         key = getattr(cls, '__metakey__')
         closed = cls._instances.get(key, {}).pop(cur_thread, None)
         if len(cls._instances.get(key, {})) == 0:
-            del cls._instances[key]
+            cls._instances.pop(key, None)
         return closed
 
     @property
@@ -164,11 +154,7 @@ def _handle_response(self, response, uri, method, raw_args, final):
         if self.poll_incomplete:
             response, body = self.poll_response(response, body)
             self._last_response = response
-        ret_val = None
-        if sys.version_info[0] == 2:
-            ret_val = json.loads(body)
-        elif sys.version_info[0] == 3:
-            ret_val = json.loads(body.decode('UTF-8'))
+        ret_val = json.loads(body.decode('UTF-8'))
 
         self._meta_update(uri, method, ret_val)
         # Handle retrying if ZoneProp is blocking the current task
@@ -225,15 +211,24 @@ def execute(self, uri, method, args=None, final=False):
         :param final: boolean flag representing whether or not we have already
             failed executing once or not
         """
+        if self._conn is None:
+            self.connect()
+
         uri = self._validate_uri(uri)
 
         # Make sure the method is valid
         self._validate_method(method)
 
-        self.logger.debug('uri: {}, method: {}, args: {}'.format(uri, method,
-                                                                 args))
         # Prepare arguments to send to API
         raw_args, args, uri = self._prepare_arguments(args, method, uri)
+
+        # Don't display password when debug logging
+        cleaned_args = json.loads(args)
+        if 'password' in cleaned_args:
+            cleaned_args['password'] = '*****'
+
+        self.logger.debug('uri: {}, method: {}, args: {}'.format(uri, method,
+                                                                 cleaned_args))
         # Send the command and deal with results
         self.send_command(uri, method, args)
 
@@ -314,11 +309,7 @@ def send_command(self, uri, method, args):
         self._conn.putheader('Content-length', '%d' % len(args))
         self._conn.endheaders()
 
-        if sys.version_info[0] == 2:
-            self._conn.send(bytes(args))
-        elif sys.version_info[0] == 3:
-            # noinspection PyArgumentList
-            self._conn.send(bytes(args, 'UTF-8'))
+        self._conn.send(prepare_to_send(args))
 
     def wait_for_job_to_complete(self, job_id, timeout=120):
         """When a response comes back with a status of "incomplete" we need to
@@ -343,7 +334,27 @@ def wait_for_job_to_complete(self, job_id, timeout=120):
             response = self.execute(uri, 'GET', api_args)
         return response
 
+    def __getstate__(cls):
+        """Because HTTP/HTTPS connections are not serializeable, we need to
+        strip the connection instance out before we ship the pickled data
+        """
+        d = cls.__dict__.copy()
+        d.pop('_conn')
+        return d
+
+    def __setstate__(cls, state):
+        """Because the HTTP/HTTPS connection was stripped out in __getstate__ we
+        must manually re-enter it as None and let the sessions execute method
+        handle rebuilding it later
+        """
+        cls.__dict__ = state
+        cls.__dict__['_conn'] = None
+
     def __str__(self):
         """str override"""
-        return '<{}>'.format(self.name)
+        return force_unicode('<{}>').format(self.name)
     __repr__ = __unicode__ = __str__
+
+    def __bytes__(self):
+        """bytes override"""
+        return bytes(self.__str__())