FIX: allow HTTP <-> HTTPS redirections when downloading images

Gemfile

@@ -53,6 +53,8 @@ gem 'fast_xs'
 
 gem 'fast_xor'
 
+gem 'open_uri_redirections'
+
 # while we sort out https://github.com/sdsykes/fastimage/pull/46
 gem 'fastimage_discourse', require: 'fastimage'
 gem 'aws-sdk', require: false

Gemfile.lock

@@ -214,6 +214,7 @@ GEM
       multi_json (~> 1.11)
       mustache
       nokogiri (~> 1.6.6)
+    open_uri_redirections (0.2.1)
     openid-redis-store (0.0.2)
       redis
       ruby-openid
@@ -443,6 +444,7 @@ DEPENDENCIES
   omniauth-openid
   omniauth-twitter
   onebox
+  open_uri_redirections
   openid-redis-store
   pg
   pry-nav

lib/file_helper.rb

@@ -14,7 +14,7 @@ class FileHelper
     tmp = Tempfile.new([tmp_file_name, extension])
 
     File.open(tmp.path, "wb") do |f|
-      downloaded = uri.open("rb", read_timeout: 5, redirect: follow_redirect)
+      downloaded = uri.open("rb", read_timeout: 5, redirect: follow_redirect, allow_redirections: :all)
       while f.size <= max_file_size && data = downloaded.read(512.kilobytes)
         f.write(data)
       end