extras/try_gzip_static: do not show backtrace on syscall errors

On ENAMETOOLONG and perhaps other system errors which we can do
nothing about, we should not spew a giant backtrace which could
be used as an easy DoS vector.

1 files changed, 12 insertions, 0 deletions

diff --git a/test/test_extras_try_gzip_static.rb b/test/test_extras_try_gzip_static.rb
index c6c8cef..4d20b5a 100644
--- a/test/test_extras_try_gzip_static.rb
+++ b/test/test_extras_try_gzip_static.rb
@@ -34,6 +34,18 @@ class TestExtrasTryGzipStatic < Testcase
       end
     end
 
+    Net::HTTP.start(host, port) do |http|
+      uri = "/COPYING/foo" + ('-' * 4096)
+      begin
+        res = http.request(Net::HTTP::Get.new(uri))
+      end while res.code.to_i == 414 && uri.chop!
+      res = http.request(Net::HTTP::Get.new("/COPYING/foo"))
+      assert_equal 404, res.code.to_i
+      lines = File.readlines(err.path)
+      File.truncate(err.path, 0)
+      assert_operator lines.size, :<, 3, lines.map! { |s| s[0,64] }.inspect
+    end
+
     begin # setup
       gpl = "#{tmpdir}/COPYING"
       gplgz = "#{tmpdir}/COPYING.gz"