From 6807cf014cb0fde611f63c64bc352038206176cc Mon Sep 17 00:00:00 2001
From: tom christie tom@tomchristie.com
Date: Wed, 26 Jan 2011 08:58:09 +0000
Subject: Added pygments_api example

---
 examples/pygments_api/views.py | 64 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 examples/pygments_api/views.py

(limited to 'examples/pygments_api/views.py')

diff --git a/examples/pygments_api/views.py b/examples/pygments_api/views.py
new file mode 100644
index 00000000..01f1b4b6
--- /dev/null
+++ b/examples/pygments_api/views.py
@@ -0,0 +1,64 @@
+from django.conf import settings
+
+from flywheel.resource import Resource
+from flywheel.response import Response, status
+from flywheel.emitters import BaseEmitter
+
+from pygments.formatters import HtmlFormatter
+from pygments.lexers import get_lexer_by_name
+from pygments import highlight
+
+from forms import PygmentsForm
+
+import os
+import hashlib
+
+# We need somewhere to store the code that we highlight
+HIGHLIGHTED_CODE_DIR = os.path.join(settings.MEDIA_ROOT, 'pygments')
+
+
+class HTMLEmitter(BaseEmitter):
+    """Basic emitter which just returns the content without any further serialization."""
+    media_type = 'text/html'
+
+
+class PygmentsRoot(Resource):
+    """This example demonstrates a simple RESTful Web API aound the awesome pygments library.
+    This top level resource is used to create  """
+    form = PygmentsForm
+    allowed_methods = anon_allowed_methods = ('POST',)
+
+    def post(self, request, auth, content):
+        # Generate a unique id by hashing the input
+        input_str = ''.join(['%s%s' % (key, content[key]) for key in sorted(content.keys())])
+        hash = hashlib.md5()
+        hash.update(input_str)
+        unique_id = hash.hexdigest()
+        pathname = os.path.join(HIGHLIGHTED_CODE_DIR, unique_id)
+
+        if not os.path.exists(pathname):
+            # We only need to generate the file if it doesn't already exist.
+            title = content['title'] if content['title'] else None
+            linenos = 'table' if content['linenos'] else False
+            lexer = get_lexer_by_name(content['lexer'])
+            formatter = HtmlFormatter(style=content['style'], linenos=linenos, full=True, title=title)
+            
+            with open(pathname, 'w') as outfile:
+                highlight(content['code'], lexer, formatter, outfile)
+            
+        return Response(status.HTTP_303_SEE_OTHER, headers={'Location': self.reverse(PygmentsInstance, unique_id)})
+
+
+class PygmentsInstance(Resource):
+    """Simply return the stored highlighted HTML file with the correct mime type.
+    This Resource only emits HTML and uses a standard HTML emitter rather than FlyWheel's DocumentingHTMLEmitter class."""
+    allowed_methods = anon_allowed_methods = ('GET',)
+    emitters = (HTMLEmitter,)
+
+    def get(self, request, auth, unique_id):
+        pathname = os.path.join(HIGHLIGHTED_CODE_DIR, unique_id)
+        if not os.path.exists(pathname):
+            return Resource(status.HTTP_404_NOT_FOUND)
+        return open(pathname, 'r').read()
+
+
-- 
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