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[tor-commits] [stem/master] Only use directory mirrors with a DirPort



commit 4d4d75fdc57de91ae6796341468811d061e82c9c
Author: Damian Johnson <atagar@xxxxxxxxxxxxxx>
Date:   Sat Nov 10 16:58:37 2018 -0800

    Only use directory mirrors with a DirPort
    
    Oops! Iirc the V2Dir flag once was only granted to relays with a DirPort but
    seems that's no longer the case. As a result our use_directory_mirrors() method
    inserted endpoints with port values of 'None'...
    
      https://trac.torproject.org/projects/tor/ticket/28393
    
      Traceback (most recent call last):
        File "bushel.py", line 21, in <module>
          for desc in downloader.get_consensus().run():
        ...
        File "/usr/lib/python3/dist-packages/stem/__init__.py", line 571, in __init__
          raise ValueError("'%s' isn't a valid port" % port)
      ValueError: 'None' isn't a valid port
    
    We could use their ORPort to download descriptors instead, but Stem's ORPort
    capabilities are still pretty immature so just gonna restrict ourselves to
    DirPort mirrors for now instead.
---
 docs/change_log.rst       | 1 +
 stem/descriptor/remote.py | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/change_log.rst b/docs/change_log.rst
index a06b2ae8..01f3f2a4 100644
--- a/docs/change_log.rst
+++ b/docs/change_log.rst
@@ -51,6 +51,7 @@ The following are only available within Stem's `git repository
 
  * **Descriptors**
 
+  * DescriptorDownloader crashed if **use_mirrors** is set (:trac:`28393`)
   * Don't download from Serge, a bridge authority that frequently timeout
 
  * **Website**
diff --git a/stem/descriptor/remote.py b/stem/descriptor/remote.py
index f1171697..47af2232 100644
--- a/stem/descriptor/remote.py
+++ b/stem/descriptor/remote.py
@@ -580,7 +580,7 @@ class DescriptorDownloader(object):
     consensus = list(self.get_consensus(document_handler = stem.descriptor.DocumentHandler.DOCUMENT).run())[0]
 
     for desc in consensus.routers.values():
-      if stem.Flag.V2DIR in desc.flags:
+      if stem.Flag.V2DIR in desc.flags and desc.dir_port:
         new_endpoints.add((desc.address, desc.dir_port))
 
     # we need our endpoints to be a list rather than set for random.choice()

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