arangodb/Documentation/DocuBlocks/JSF_foxx_BaseMiddleware_response_set.md

response.set(key, value)

Set a header attribute, for example:

@EXAMPLES

response.set("Content-Length", 123);
response.set("Content-Type", "text/plain");

or alternatively:

response.set({
  "Content-Length": "123",
  "Content-Type": "text/plain"
});