Hotfix for nevow#106

src/allmydata/web/_nevow_106.py

@@ -0,0 +1,31 @@
+"""
+Implement a work-around for <https://github.com/twisted/nevow/issues/106>.
+"""
+
+from __future__ import (
+    print_function,
+    unicode_literals,
+    absolute_import,
+    division,
+)
+
+from nevow import inevow
+from twisted.internet import defer
+
+def renderHTTP(self, ctx):
+    request = inevow.IRequest(ctx)
+    if self.real_prepath_len is not None:
+        request.postpath = request.prepath + request.postpath
+        request.prepath = request.postpath[:self.real_prepath_len]
+        del request.postpath[:self.real_prepath_len]
+    result = defer.maybeDeferred(self.original.render, request).addCallback(
+        self._handle_NOT_DONE_YET, request)
+    return result
+
+
+def patch():
+    """
+    Monkey-patch the proposed fix into place.
+    """
+    from nevow.appserver import OldResourceAdapter
+    OldResourceAdapter.renderHTTP = renderHTTP

src/allmydata/web/private.py

@@ -54,6 +54,11 @@ from .logs import (
     create_log_resources,
 )
 
+# Hotfix work-around https://github.com/twisted/nevow/issues/106
+from . import _nevow_106
+_nevow_106.patch()
+del _nevow_106
+
 SCHEME = b"tahoe-lafs"
 
 class IToken(ICredentials):