change the way we handle last chunk, on't break but instead test if last

was an empty string. So we allows idiot content to send empty string at
first.

examples/djangotest/testing/urls.py

@@ -1,5 +1,7 @@
 from django.conf.urls.defaults import patterns, url
 
 urlpatterns = patterns('',
+    url(r'^acsv$', 'testing.views.acsv'),
     url(r'^$', 'testing.views.home'),
-)
+    
+)

examples/djangotest/testing/views.py

@@ -1,7 +1,9 @@
 # Create your views here.
 
+import csv
 import os
 from django import forms
+from django.http import HttpResponse
 from django.shortcuts import render_to_response
 import tempfile
 
@@ -40,4 +42,19 @@ def home(request):
     })
     
     
-            
+def acsv(request):
+    rows = [
+        {'a': 1, 'b': 2},
+        {'a': 3, 'b': 3}
+    ]
+ 
+    response = HttpResponse(mimetype='text/csv')
+    response['Content-Disposition'] = 'attachment; filename=report.csv'
+ 
+    writer = csv.writer(response)
+    writer.writerow(['a', 'b'])
+ 
+    for r in rows:
+        writer.writerow([r['a'], r['b']])
+        
+    return response

examples/djangotest/urls.py

@@ -2,5 +2,5 @@
 from django.conf.urls.defaults import patterns,include
 
 urlpatterns = patterns('',
-    ('^$', include("testing.urls")),
-)
+    (r'^', include("testing.urls")),
+)

gunicorn/http/request.py

@@ -170,5 +170,6 @@ class Request(object):
                     self.response_chunked = True
             if not isinstance(value, basestring):
                 value = str(value)
-            self.response_headers.append((name.title(), value.strip()))     
+            self.response_headers.append((name.title(), value.strip()))
+
         self.start_response_called = True

gunicorn/http/response.py

@@ -30,11 +30,12 @@ class Response(object):
         resp_head.extend(["%s: %s\r\n" % (n, v) for n, v in self.headers])
         write(self._sock, "%s\r\n" % "".join(resp_head))
 
-        for chunk in list(self.data):
-            if chunk == "": break
+        last_chunk = None
+        for chunk in self.data:
+            last_chunk = chunk
             write(self._sock, chunk, self.chunked)
             
-        if self.chunked:
+        if self.chunked and last_chunk != "":
             # send last chunk
             write_chunk(self._sock, "")