Response-Header defaults

[Sascha Reuter]

Hey there,

anyone know how to set a response header globally? For instance, if you want "Cache-Control" to be set to "private" as default.

Is this possible, or do you have to set this in every route manually?

Thanks in advance,

Sascha

[TJ Holowaychuk]

look into middleware, to apply to every request do:

app.use(function(req,res,next){

  res.header('Cache-Control', 'foo bar baz');

  next()

});

-- 
TJ Holowaychuk

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[Tom]

Hi TJ,

Isn't setting such header for every request quite inefficient? Surely setting standard default headers would be more efficient?

Tom

2011/8/29 TJ Holowaychuk <t...@vision-media.ca>

[TJ Holowaychuk]

how does that differ? you're setting the fields either way,

not sure what you mean by "standard default headers". I wouldn't

consider that inefficient at all though it just adds a bit more beef

to your response but HTTP is already a very verbose protocol 

-- 
TJ Holowaychuk

[Tom]

Well, the difference is that the middleware function has to be called on every request now. Whereas it otherwise only has to be called during initialization.

I guess it is a micro optimisation though, it's okay the way it is.

Thanks.

[TJ Holowaychuk]

the Express initialization (parsing the querystring for req.query etc) is 

middleware as well, you're interacting with the request regardless, so

you'd maybe save a few function calls by adding some built-in default

header field support, not worth breaking the abstraction IMO

-- 
TJ Holowaychuk