From: Brian Warner <warner@allmydata.com>
Date: Sat, 22 Nov 2008 03:29:32 +0000 (-0700)
Subject: upload: when using a Helper, insist that it provide protocols/helper/v1 . Related... 
X-Git-Url: https://git.rkrishnan.org/specifications//%22%3C?a=commitdiff_plain;h=3e25efc010876b42dbc890760a576794eec7ddce;p=tahoe-lafs%2Ftahoe-lafs.git

upload: when using a Helper, insist that it provide protocols/helper/v1 . Related to #538.
---

diff --git a/src/allmydata/immutable/upload.py b/src/allmydata/immutable/upload.py
index 3b653d8a..c37aa0e9 100644
--- a/src/allmydata/immutable/upload.py
+++ b/src/allmydata/immutable/upload.py
@@ -18,7 +18,8 @@ from allmydata.util import base32, idlib, mathutil
 from allmydata.util.assertutil import precondition
 from allmydata.util.rrefutil import get_versioned_remote_reference
 from allmydata.interfaces import IUploadable, IUploader, IUploadResults, \
-     IEncryptedUploadable, RIEncryptedUploadable, IUploadStatus, NotEnoughSharesError
+     IEncryptedUploadable, RIEncryptedUploadable, IUploadStatus, \
+     NotEnoughSharesError, InsufficientVersionError
 from allmydata.immutable import layout
 from pycryptopp.cipher.aes import AES
 
@@ -1242,6 +1243,9 @@ class Uploader(service.MultiService):
         d.addCallback(self._got_versioned_helper)
 
     def _got_versioned_helper(self, helper):
+        needed = "http://allmydata.org/tahoe/protocols/helper/v1"
+        if needed not in helper.version:
+            raise InsufficientVersionError(needed, helper.version)
         self._helper = helper
         helper.notifyOnDisconnect(self._lost_helper)