Validate SSL certs accessed through urllib*

* Adds another module utility file which generalizes the
  access of urls via the urllib* libraries.
* Adds a new spec generator for common arguments.
* Makes the user-agent string configurable.

Fixes #6211

library/notification/flowdock

@@ -96,31 +96,12 @@ EXAMPLES = '''
             tags=tag1,tag2,tag3
 '''
 
-HAS_URLLIB = True
-try:
-    import urllib
-except ImportError:
-    HAS_URLLIB = False
-
-HAS_URLLIB2 = True
-try:
-    import urllib2
-except ImportError:
-    HAS_URLLIB2 = False
-
-
-
 # ===========================================
 # Module execution.
 #
 
 def main():
 
-    if not HAS_URLLIB:
-        module.fail_json(msg="urllib is not installed")
-    if not HAS_URLLIB2:
-        module.fail_json(msg="urllib2 is not installed")
-
     module = AnsibleModule(
         argument_spec=dict(
             token=dict(required=True),
@@ -187,14 +168,16 @@ def main():
         module.exit_json(changed=False)
 
     # Send the data to Flowdock
-    try:
-        response = urllib2.urlopen(url, urllib.urlencode(params))
-    except Exception, e:
-        module.fail_json(msg="unable to send msg: %s" % e)
+    data = urllib.urlencode(params)
+    response, info = fetch_url(module, url, data=data)
+    if info['status'] != 200:
+        module.fail_json(msg="unable to send msg: %s" % info['msg'])
 
-    module.exit_json(changed=False, msg=module.params["msg"])
+    module.exit_json(changed=True, msg=module.params["msg"])
 
 # import module snippets
 from ansible.module_utils.basic import *
+from ansible.module_utils.urls import *
+
 main()