diff --git a/src/allmydata/web/common.py b/src/allmydata/web/common.py
index 2794a64fa..bd7d2f443 100644
--- a/src/allmydata/web/common.py
+++ b/src/allmydata/web/common.py
@@ -203,8 +203,7 @@ def plural(sequence_or_length):
         return ""
     return "s"
 
-def text_plain(text, ctx):
-    req = IRequest(ctx)
+def text_plain(text, req):
     req.setHeader("content-type", "text/plain")
     req.setHeader("content-length", b"%d" % len(text))
     return text
diff --git a/src/allmydata/web/filenode.py b/src/allmydata/web/filenode.py
index 10bf26847..71de6e7b9 100644
--- a/src/allmydata/web/filenode.py
+++ b/src/allmydata/web/filenode.py
@@ -207,14 +207,14 @@ class FileNodeHandler(Resource, ReplaceMeMixin, object):
                     self.parentnode.get_metadata_for(self.name))
             else:
                 d.addCallback(lambda ignored: None)
-            d.addCallback(lambda md: FileJSONMetadata(ctx, self.node, md))
+            d.addCallback(lambda md: FileJSONMetadata(req, self.node, md))
             return d
         if t == "info":
             return MoreInfo(self.node)
         if t == "uri":
-            return FileURI(ctx, self.node)
+            return FileURI(req, self.node)
         if t == "readonly-uri":
-            return FileReadOnlyURI(ctx, self.node)
+            return FileReadOnlyURI(req, self.node)
         raise WebError("GET file: bad t=%s" % t)
 
     def render_HEAD(self, req):
@@ -311,7 +311,7 @@ class FileNodeHandler(Resource, ReplaceMeMixin, object):
             d.addCallback(self._maybe_literal, CheckResultsRenderer)
         return d
 
-    def render_DELETE(self, ctx):
+    def render_DELETE(self, req):
         assert self.parentnode and self.name
         d = self.parentnode.delete(self.name)
         d.addCallback(lambda res: self.node.get_uri())
@@ -491,12 +491,12 @@ class FileDownloader(Resource, object):
                 # We haven't written anything yet, so we can provide a
                 # sensible error message.
                 eh = MyExceptionHandler()
-                eh.renderHTTP_exception(ctx, f)
+                eh.renderHTTP_exception(req, f)
         d.addCallbacks(_finished, _error)
         return req.deferred
 
 
-def FileJSONMetadata(ctx, filenode, edge_metadata):
+def FileJSONMetadata(req, filenode, edge_metadata):
     rw_uri = filenode.get_write_uri()
     ro_uri = filenode.get_readonly_uri()
     data = ("filenode", get_filenode_metadata(filenode))
@@ -510,16 +510,16 @@ def FileJSONMetadata(ctx, filenode, edge_metadata):
     if edge_metadata is not None:
         data[1]['metadata'] = edge_metadata
 
-    return text_plain(json.dumps(data, indent=1) + "\n", ctx)
+    return text_plain(json.dumps(data, indent=1) + "\n", req)
 
-def FileURI(ctx, filenode):
-    return text_plain(filenode.get_uri(), ctx)
+def FileURI(req, filenode):
+    return text_plain(filenode.get_uri(), req)
 
-def FileReadOnlyURI(ctx, filenode):
+def FileReadOnlyURI(req, filenode):
     if filenode.is_readonly():
-        return text_plain(filenode.get_uri(), ctx)
-    return text_plain(filenode.get_readonly_uri(), ctx)
+        return text_plain(filenode.get_uri(), req)
+    return text_plain(filenode.get_readonly_uri(), req)
 
 class FileNodeDownloadHandler(FileNodeHandler):
-    def childFactory(self, ctx, name):
+    def childFactory(self, req, name):
         return FileNodeDownloadHandler(self.client, self.node, name=name)