Convert FTPResponse to use the same tricks as the HTTPResponse for returning...

Convert FTPResponse to use the same tricks as the HTTPResponse for returning large amounts of data without using too much memory.

ZServer/FTPResponse.py

@@ -86,17 +86,24 @@
 Response class for the FTP Server.
 """
 
-from ZPublisher.HTTPResponse import HTTPResponse
+from ZServer.HTTPResponse import ZServerHTTPResponse
 from PubCore.ZEvent import Wakeup
 from cStringIO import StringIO
 import marshal
 
 
-class FTPResponse(HTTPResponse):
+class FTPResponse(ZServerHTTPResponse):
     """
     Response to an FTP command
     """
 
+    def __str__(self):
+        ZServerHTTPResponse.__str__(self)
+        return
+
+    def outputBody(self):
+        pass
+
     def setCookie(self, name, value, **kw):
         self.cookies[name]=value
 
@@ -109,9 +116,6 @@ class FTPResponse(HTTPResponse):
     def _cookie_list(self):
         return []
 
-    def _finish(self):
-        self.stdout.finish(self)
-
     def _marshalledBody(self):
         return marshal.loads(self.body)
 
@@ -124,13 +128,15 @@ class CallbackPipe:
     def __init__(self, callback, args):
         self._callback=callback
         self._args=args
-        
-    def write(self, text):
-        pass
+        self._producers=[]
         
     def close(self):
         pass
         
+    def write(self, text, l=None):
+        if text:
+            self._producers.append(text)
+    
     def finish(self, response):
         self._response=response
         Wakeup(self.apply) # move callback to medusas thread
@@ -138,7 +144,7 @@ class CallbackPipe:
     def apply(self):
         result=apply(self._callback, self._args+(self._response,))
        
-        # is this necessary to break cycles?
+        # break cycles
         self._callback=None
         self._response=None
         self._args=None

ZServer/FTPServer.py

@@ -354,7 +354,11 @@ class zope_ftp_channel(ftp_channel):
         status=response.getStatus()
         if status==200:
             self.make_xmit_channel()
+            if not response._wrote:
                 self.client_dc.push(response.body)
+            else:
+                for producer in response.stdout._producers:
+                    self.client_dc.push_with_producer(producer)
             self.client_dc.close_when_done()
             self.respond(
                     "150 Opening %s mode data connection for file '%s'" % (

lib/python/ZServer/FTPResponse.py

@@ -86,17 +86,24 @@
 Response class for the FTP Server.
 """
 
-from ZPublisher.HTTPResponse import HTTPResponse
+from ZServer.HTTPResponse import ZServerHTTPResponse
 from PubCore.ZEvent import Wakeup
 from cStringIO import StringIO
 import marshal
 
 
-class FTPResponse(HTTPResponse):
+class FTPResponse(ZServerHTTPResponse):
     """
     Response to an FTP command
     """
 
+    def __str__(self):
+        ZServerHTTPResponse.__str__(self)
+        return
+
+    def outputBody(self):
+        pass
+
     def setCookie(self, name, value, **kw):
         self.cookies[name]=value
 
@@ -109,9 +116,6 @@ class FTPResponse(HTTPResponse):
     def _cookie_list(self):
         return []
 
-    def _finish(self):
-        self.stdout.finish(self)
-
     def _marshalledBody(self):
         return marshal.loads(self.body)
 
@@ -124,13 +128,15 @@ class CallbackPipe:
     def __init__(self, callback, args):
         self._callback=callback
         self._args=args
-        
-    def write(self, text):
-        pass
+        self._producers=[]
         
     def close(self):
         pass
         
+    def write(self, text, l=None):
+        if text:
+            self._producers.append(text)
+    
     def finish(self, response):
         self._response=response
         Wakeup(self.apply) # move callback to medusas thread
@@ -138,7 +144,7 @@ class CallbackPipe:
     def apply(self):
         result=apply(self._callback, self._args+(self._response,))
        
-        # is this necessary to break cycles?
+        # break cycles
         self._callback=None
         self._response=None
         self._args=None

lib/python/ZServer/FTPServer.py

@@ -354,7 +354,11 @@ class zope_ftp_channel(ftp_channel):
         status=response.getStatus()
         if status==200:
             self.make_xmit_channel()
+            if not response._wrote:
                 self.client_dc.push(response.body)
+            else:
+                for producer in response.stdout._producers:
+                    self.client_dc.push_with_producer(producer)
             self.client_dc.close_when_done()
             self.respond(
                     "150 Opening %s mode data connection for file '%s'" % (