core: retry if server doesn't support byte ranges on download [GH-4479]

CHANGELOG.md

@@ -63,6 +63,8 @@ BUG FIXES:
   - core: don't check for metadata if the download URL is not HTTP [GH-6540]
   - core: don't make custom dotfile path if there is no Vagrantfile [GH-6542]
   - core: more robust check for admin privs on Windows [GH-5616]
+  - core: properly detect when HTTP server doesn't support byte ranges and
+      retry from scratch [GH-4479]
   - commands/box: removing all versions and providers of a box will properly
       clean all directories in `~/.vagrant.d/boxes` [GH-3570]
   - commands/rdp: prefer `xfreerdp` if it is available on Linux [GH-6475]

lib/vagrant/util/downloader.rb

@@ -138,11 +138,14 @@ def download!
           # If we already retried, raise it.
           raise if retried
 
+          @logger.error("Exit code: #{e.extra_data[:code]}")
+
           # If its any error other than 33, it is an error.
-          raise if e.extra_data[:exit_code].to_i != 33
+          raise if e.extra_data[:code].to_i != 33
 
           # Exit code 33 means that the server doesn't support ranges.
           # In this case, try again without resume.
+          @logger.error("Error is server doesn't support byte ranges. Retrying from scratch.")
           @continue = false
           retried = true
           retry