watcher: prevent Rack::Deflater from buffering

Set "Cache-Control: no-transform" to prevent frontend proxies
from flushing data.

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/raindrops/watcher.rb b/lib/raindrops/watcher.rb
index 40b53c5..52a8eff 100644
--- a/lib/raindrops/watcher.rb
+++ b/lib/raindrops/watcher.rb
@@ -339,7 +339,10 @@ class Raindrops::Watcher
     end
 
     def finish
-      headers = { "Content-Type" => "text/plain" }
+      headers = {
+        "Content-Type" => "text/plain",
+        "Cache-Control" => "no-transform",
+      }
       headers["Transfer-Encoding"] = "chunked" if @chunk
       [ 200, headers, self ]
     end