Response Headers

The Response Headers middleware lets you add, override or remove HTTP headers after your application handler has produced a response. You can attach static values or dynamically compute them via String Rewrite.

Configuration

response_headers \
  additions: {
    "X-Processed-By"        => ["Itsi"],
    "X-Response-Time-Millis" => ["{response_time}"]
  },
  removals: ["Server"]

• additions Hash(String,Array(StringRewrite)) A map of header names to StringRewrite templates. Templates are evaluated against the final response and context in after.
• removals Array(String) A list of header names to delete before adding new ones.

Examples

# Stamp every response with our server name
response_headers \
  additions: { "X-Powered-By" => ["Itsi"] },
  removals:  []

# Remove the Server header and add timing info
response_headers \
  additions: { "X-Response-Time" => ["{response_time}"] },
  removals:  ["Server"]