Backport Invalid Content-Disposition header fix to v4.3

NEWS

@@ -1,3 +1,7 @@
+4.3.8 (8/23/2017):
+
+* Bug Fix: Backport "Ignore invalid content-disposition header (#2284)" to 4.3
+
 4.3.7 (7/1/2016):
 
 * Add deprecation warnings

lib/paperclip/io_adapters/uri_adapter.rb

@@ -30,8 +30,9 @@ def content_type_from_content
 
     def filename_from_content_disposition
       if @content.meta.has_key?("content-disposition")
-        @content.meta["content-disposition"].
-          match(/filename="([^"]*)"/)[1]
+        matches = @content.meta["content-disposition"].
+          match(/filename="([^"]*)"/)
+        matches[1] if matches
       end
     end
 

lib/paperclip/version.rb

@@ -1,3 +1,3 @@
 module Paperclip
-  VERSION = "4.3.7".freeze unless defined? Paperclip::VERSION
+  VERSION = "4.3.8".freeze unless defined? Paperclip::VERSION
 end