# HG changeset patch
# User paulb
# Date 1163720410 0
# Node ID d7000fde266adda741268ff3f2500ef34c5990d8
# Parent  6621024fa2a7ecd51cb94c8ea2506de1b2e9fcac
[project @ 2006-11-16 23:40:10 by paulb]
Added rollback method implementations.

diff -r 6621024fa2a7 -r d7000fde266a WebStack/BaseHTTPRequestHandler.py
--- a/WebStack/BaseHTTPRequestHandler.py	Thu Nov 16 23:39:56 2006 +0000
+++ b/WebStack/BaseHTTPRequestHandler.py	Thu Nov 16 23:40:10 2006 +0000
@@ -103,6 +103,18 @@
         self.trans.end_headers()
         self.trans.wfile.write(content)
 
+    def rollback(self):
+
+        """
+        A special method, partially synchronising the transaction with
+        framework-specific objects, but discarding previously emitted content
+        that is to be replaced by an error message.
+        """
+
+        self.content = StringIO()
+        self.headers_out = {}
+        self.cookies_out = SimpleCookie()
+
     # Server-related methods.
 
     def get_server_name(self):
diff -r 6621024fa2a7 -r d7000fde266a WebStack/CGI.py
--- a/WebStack/CGI.py	Thu Nov 16 23:39:56 2006 +0000
+++ b/WebStack/CGI.py	Thu Nov 16 23:40:10 2006 +0000
@@ -100,6 +100,18 @@
         self.content.seek(0)
         self.output.write(self.content.read())
 
+    def rollback(self):
+
+        """
+        A special method, partially synchronising the transaction with
+        framework-specific objects, but discarding previously emitted content
+        that is to be replaced by an error message.
+        """
+
+        self.content = StringIO()
+        self.headers_out = {}
+        self.cookies_out = SimpleCookie()
+
     # Server-related methods.
 
     def get_server_name(self):
diff -r 6621024fa2a7 -r d7000fde266a WebStack/Django.py
--- a/WebStack/Django.py	Thu Nov 16 23:39:56 2006 +0000
+++ b/WebStack/Django.py	Thu Nov 16 23:40:10 2006 +0000
@@ -60,6 +60,17 @@
         self.content.seek(0)
         self.response.content = self.content.read()
 
+    def rollback(self):
+
+        """
+        A special method, partially synchronising the transaction with
+        framework-specific objects, but discarding previously emitted content
+        that is to be replaced by an error message.
+        """
+
+        self.response = HttpResponse()
+        self.content = StringIO()
+
     # Server-related methods.
 
     def get_server_name(self):
diff -r 6621024fa2a7 -r d7000fde266a WebStack/Generic.py
--- a/WebStack/Generic.py	Thu Nov 16 23:39:56 2006 +0000
+++ b/WebStack/Generic.py	Thu Nov 16 23:40:10 2006 +0000
@@ -74,6 +74,16 @@
 
         pass
 
+    def rollback(self):
+
+        """
+        A special method, partially synchronising the transaction with
+        framework-specific objects, but discarding previously emitted content
+        that is to be replaced by an error message.
+        """
+
+        pass
+
     # Utility methods.
 
     def parse_header_value(self, header_class, header_value_str):
diff -r 6621024fa2a7 -r d7000fde266a WebStack/WSGI.py
--- a/WebStack/WSGI.py	Thu Nov 16 23:39:56 2006 +0000
+++ b/WebStack/WSGI.py	Thu Nov 16 23:40:10 2006 +0000
@@ -77,6 +77,18 @@
         if self.session_store is not None:
             self.session_store.close()
 
+    def rollback(self):
+
+        """
+        A special method, partially synchronising the transaction with
+        framework-specific objects, but discarding previously emitted content
+        that is to be replaced by an error message.
+        """
+
+        self.content = StringIO()
+        self.headers_out = {}
+        self.cookies_out = SimpleCookie()
+
     def get_wsgi_headers(self):
         wsgi_headers = []