Very basic YAML support. Probably needs some tweaking, and definitely needs tests.

djangorestframework/parsers.py

@@ -18,12 +18,15 @@ from djangorestframework import status
 from djangorestframework.response import ErrorResponse
 from djangorestframework.utils.mediatypes import media_type_matches
 
+import yaml
+
 __all__ = (
     'BaseParser',
     'JSONParser',
     'PlainTextParser',
     'FormParser',
     'MultiPartParser',
+    'YAMLParser',
 )
 
 
@@ -84,6 +87,26 @@ class JSONParser(BaseParser):
                                 {'detail': 'JSON parse error - %s' % unicode(exc)})
 
 
+class YAMLParser(BaseParser):
+    """
+    Parses YAML-serialized data.
+    """
+
+    media_type = 'application/yaml'
+
+    def parse(self, stream):
+        """
+        Returns a 2-tuple of `(data, files)`.
+
+        `data` will be an object which is the parsed content of the response.
+        `files` will always be `None`.
+        """
+        try:
+            return (yaml.safe_load(stream), None)
+        except ValueError, exc:
+            raise ErrorResponse(status.HTTP_400_BAD_REQUEST,
+                                {'detail': 'YAML parse error - %s' % unicode(exc)})
+
 
 class PlainTextParser(BaseParser):
     """

djangorestframework/renderers.py

@@ -11,7 +11,7 @@ from django.core.serializers.json import DateTimeAwareJSONEncoder
 from django.template import RequestContext, loader
 from django.utils import simplejson as json
 
-from djangorestframework import status
+
 from djangorestframework.compat import apply_markdown
 from djangorestframework.utils import dict2xml, url_resolves
 from djangorestframework.utils.breadcrumbs import get_breadcrumbs
@@ -19,10 +19,9 @@ from djangorestframework.utils.description import get_name, get_description
 from djangorestframework.utils.mediatypes import get_media_type_params, add_media_type_param, media_type_matches
 from djangorestframework import VERSION
 
-from decimal import Decimal
-import re
 import string
 from urllib import quote_plus
+import yaml
 
 __all__ = (
     'BaseRenderer',
@@ -31,7 +30,8 @@ __all__ = (
     'DocumentingHTMLRenderer',
     'DocumentingXHTMLRenderer',
     'DocumentingPlainTextRenderer',
-    'XMLRenderer'
+    'XMLRenderer',
+    'YAMLRenderer'
 )
 
 
@@ -120,6 +120,20 @@ class XMLRenderer(BaseRenderer):
             return ''
         return dict2xml(obj)
 
+class YAMLRenderer(BaseRenderer):
+    """
+    Renderer which serializes to YAML.
+    """
+
+    media_type = 'application/yaml'
+
+    def render(self, obj=None, media_type=None):
+        """
+        Renders *obj* into serialized YAML.
+        """
+        if obj is None:
+            return ''
+        return yaml.dump(obj)
 
 class TemplateRenderer(BaseRenderer):
     """
@@ -346,6 +360,7 @@ DEFAULT_RENDERERS = ( JSONRenderer,
                       DocumentingHTMLRenderer,
                       DocumentingXHTMLRenderer,
                       DocumentingPlainTextRenderer,
-                      XMLRenderer )
+                      XMLRenderer,
+                      YAMLRenderer )