1 files changed, 46 insertions, 0 deletions
diff --git a/cherrypy/lib/cptools.py b/cherrypy/lib/cptools.py
index f437f3ba..fa3f219b 100644
--- a/cherrypy/lib/cptools.py
+++ b/cherrypy/lib/cptools.py
@@ -486,3 +486,49 @@ def paramsFromCGIForm(form):
     return paramMap
 
 
+class HeaderMap(dict):
+    """A dict subclass for HTTP request and response headers.
+    
+    Each key is changed on entry to str(key).title(). This allows headers
+    to be case-insensitive and avoid duplicates.
+    """
+    
+    def __getitem__(self, key):
+        return dict.__getitem__(self, str(key).title())
+    
+    def __setitem__(self, key, value):
+        dict.__setitem__(self, str(key).title(), value)
+    
+    def __delitem__(self, key):
+        dict.__delitem__(self, str(key).title())
+    
+    def __contains__(self, item):
+        return dict.__contains__(self, str(item).title())
+    
+    def get(self, key, default=None):
+        return dict.get(self, str(key).title(), default)
+    
+    def has_key(self, key):
+        return dict.has_key(self, str(key).title())
+    
+    def update(self, E):
+        for k in E.keys():
+            self[str(k).title()] = E[k]
+    
+    def fromkeys(cls, seq, value=None):
+        newdict = cls()
+        for k in seq:
+            newdict[str(k).title()] = value
+        return newdict
+    fromkeys = classmethod(fromkeys)
+    
+    def setdefault(self, key, x=None):
+        key = str(key).title()
+        try:
+            return self[key]
+        except KeyError:
+            self[key] = x
+            return x
+    
+    def pop(self, key, default):
+        return dict.pop(self, str(key).title(), default)