Modifying IANA registry to aid in maintenance.

rfc2045/contenttype_iana.json

@@ -0,0 +1,91 @@
+[
+    "application": [
+        "octet-stream":{"defaults": {"type": , "padding": "8"}}
+    ],
+
+    "audio": [
+        "basic": {}
+    ],
+
+    "example": [
+    ],
+
+    "image": [
+        "jpeg": {}
+    ],
+
+    "message": [
+    ],
+
+    "model": [
+    ],
+
+    "multipart": [
+    ],
+
+    "text": [
+        "1d-interleaved-parityfec":{},
+        "calendar":{},
+        "css":{},
+        "csv":{},
+        "dns":{},
+        "enriched":{},
+        "example":{},
+        "fwdred":{},
+        "html":{},
+        "jcr-cnd":{},
+        "mizar":{},
+        "n3":{},
+        "parityfec":{},
+        "plain":{"defaults":{"charset": "us-ascii"}},
+        "prs.fallenstein.rst":{},
+        "prs.lines.tag":{},
+        "raptofec":{},
+        "RED":{},
+        "rfc822-headers":{},
+        "richtext":{},
+        "rtf":{},
+        "trp-enc-aescm128":{},
+        "rtx":{},
+        "sgml":{},
+        "t140":{},
+        "tab-separated-values":{},
+        "troff":{},
+        "turtle":{},
+        "ulpfec":{},
+        "uri-list":{},
+        "vcard"::{"mandatory":{"charset": "utf-8"}},
+        "vnd.abc":{"optional":["version", "charset"]},
+        "vnd.curl":{},
+        "vnd.DMClientScript":{},
+        "vnd.dvb.subtitle":{},
+        "vnd.esmertec.theme-descriptor":{},
+        "vnd.fly":{},
+        "vnd.fmi.flxstor":{},
+        "vnd.graphviz":{},
+        "vnd.in3d.3dml":{},
+        "vnd.in3d.spot":{},
+        "vnd.IPTC.NewsML":{},
+        "vnd.IPTC.NITF":{},
+        "vnd.latex-z":{},
+        "vnd.motorola.reflx":{},
+        "vnd.ms-mediapackage":{},
+        "vnd.net2phone.commcenter.command":{},
+        "vnd.radisys.msml-basic-layout":{},
+        "vnd.si.uricatalogue":{},
+        "vnd.sun.j2me.app-descriptor":{},
+        "vnd.trolltech.linguist":{},
+        "vnd.wap.si":{},
+        "vnd.wap.sl":{},
+        "vnd.wap.wml":{},
+        "vnd.wap.wmlscript":{},
+        "xml":{},
+        "xml-external-parsed-entity":{},
+    ],
+
+    "video": [
+        "mpeg": {}
+    ]
+]
+
+

rfc2045/contenttype_iana.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8 -*-
+"""IANA registered Content-Type type and subtype values."""
+__version__ = '1.0'
+__copyright__ = """Copyright 2011 Lance Finn Helsten (helsten@acm.org)"""
+__license__ = """
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+
+import sys
+if sys.version_info < (3, 2):
+    raise Exception("rfc2045 requires Python 3.2 or higher.")
+import locale
+import logging
+import string
+import re
+
+__all__ = ['iana_type', 'iana_subtype', 'iana_default_parameters']
+
+#
+# The text file that contains all the IANA registered types and subtypes
+# with each pair containing zero or more named lists of parameters.
+# - "defaults" is a dictionary of parameters and default values.
+# - "mandatory" is a list of parameters that must exist when parsing.
+# - "optional" is a list of parameters that may be used with the type/subtype.
+#
+
+iana_types = {
+    'text':{
+        'plain':{"defaults":[("charset", "us-ascii")]}
+    },
+    'image':{
+        'jpeg':{}
+    },
+    'audio':{
+        'basic':{}
+    },
+    'video':{
+        'mpeg':{}
+    },
+    'application':{
+        'octet-stream':{"defaults":[("type", None), ("padding", '8')]},
+        'postscript':{}
+    }
+}
+
+def iana_type(t):
+    """Is the given type (`t`) a discrete IANA type defined in RFC 2045?"""
+    return t in iana_types.keys()
+
+def iana_subtype(t, st):
+    """Is the given type (`st`) within (`t`) a defined subtype in
+    RFC 2045?"""
+    #TODO Build a registry that can contain all the IANA subtypes
+    return st in iana_types.get(t, {}).keys()
+
+def iana_default_parameters(t, st):
+    """Return a dictionary of default parameters for the given type
+    and subtype."""
+    t_st = iana_types.get(t, {}).get(st, {}).get("defaults", [])
+    t_st = dict(t_st)
+    return t_st
+
+class ContentTypeIANA():
+    """This defines a top level IANA Content-Type type value."""
+    pass
+