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/*!
* Connect
* Copyright(c) 2011 TJ Holowaychuk
* MIT Licensed
*/
/**
* Module dependencies.
*/
var http = require('http')
, res = http.OutgoingMessage.prototype;
// original setHeader()
var setHeader = res.setHeader;
// original _renderHeaders()
var _renderHeaders = res._renderHeaders;
if (res._hasConnectPatch) return;
/**
* Provide a public "header sent" flag
* until node does.
*
* @return {Boolean}
* @api public
*/
res.__defineGetter__('headerSent', function(){
return this._headerSent;
});
/**
* Set header `field` to `val`, special-casing
* the `Set-Cookie` field for multiple support.
*
* @param {String} field
* @param {String} val
* @api public
*/
res.setHeader = function(field, val){
var key = field.toLowerCase()
, prev;
// special-case Set-Cookie
if (this._headers && 'set-cookie' == key) {
if (prev = this.getHeader(field)) {
val = Array.isArray(prev)
? prev.concat(val)
: [prev, val];
}
// charset
} else if ('content-type' == key && this.charset) {
val += '; charset=' + this.charset;
}
return setHeader.call(this, field, val);
};
/**
* Proxy `res.end()` to expose a 'header' event,
* allowing arbitrary augmentation before the header
* fields are written to the socket.
*
* NOTE: this _only_ supports node's progressive header
* field API aka `res.setHeader()`.
*/
res._renderHeaders = function(){
this.emit('header');
return _renderHeaders.call(this);
};
res._hasConnectPatch = true;