From 3a76f7c2dd8846eb55455bf4fb2cec9db5347af2 Mon Sep 17 00:00:00 2001
From: Stephan Richter <stephan.richter@gmail.com>
Date: Thu, 8 Jul 2004 18:40:31 +0000
Subject: [PATCH] Backport of XXX removal.

---
 browser.py | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 browser.py

diff --git a/browser.py b/browser.py
new file mode 100644
index 0000000..84bca75
--- /dev/null
+++ b/browser.py
@@ -0,0 +1,74 @@
+##############################################################################
+#
+# Copyright (c) 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""Browser Publication Code
+
+This module implements browser-specific publication and traversal components
+for the publisher.
+
+$Id$
+"""
+from zope.app.publication.publicationtraverse \
+     import PublicationTraverser as PublicationTraverser_
+from zope.app.publication.http import BaseHTTPPublication
+from zope.component import queryViewProviding
+from zope.proxy import removeAllProxies
+from zope.publisher.interfaces.browser import IBrowserPublisher
+from zope.security.checker import ProxyFactory
+
+class PublicationTraverser(PublicationTraverser_):
+
+    def traverseRelativeURL(self, request, ob, path):
+        ob = self.traversePath(request, ob, path)
+
+        while True:
+            adapter = IBrowserPublisher(ob, None)
+            if adapter is None:
+                return ob
+            ob, path = adapter.browserDefault(request)
+            ob = ProxyFactory(ob)
+            if not path:
+                return ob
+
+            ob = self.traversePath(request, ob, path)
+
+class BrowserPublication(BaseHTTPPublication):
+    """Web browser publication handling."""
+
+    def getDefaultTraversal(self, request, ob):
+        if IBrowserPublisher.providedBy(removeAllProxies(ob)):
+            # ob is already proxied, so the result of calling a method will be
+            return ob.browserDefault(request)
+        else:
+            adapter = queryViewProviding(ob, IBrowserPublisher, request , None)
+            if adapter is not None:
+                ob, path = adapter.browserDefault(request)
+                ob = ProxyFactory(ob)
+                return ob, path
+            else:
+                # ob is already proxied
+                return ob, None
+
+    def afterCall(self, request, ob):
+        super(BrowserPublication, self).afterCall(request, ob)
+        if request.method == 'HEAD':
+            request.response.setBody('')
+
+# For now, have a factory that returns a singleton
+class PublicationFactory(object):
+
+    def __init__(self, db):
+        self.__pub = BrowserPublication(db)
+
+    def __call__(self):
+        return self.__pub