http: provide access to raw headers/trailers

The format is [key,value,key,value,...] because that seems to have the
lowest overhead.

Close #4844

1 files changed, 24 insertions, 3 deletions

diff --git a/lib/_http_incoming.js b/lib/_http_incoming.js
index f609e4fc21..8949d4571a 100644
--- a/lib/_http_incoming.js
+++ b/lib/_http_incoming.js
@@ -49,7 +49,9 @@ function IncomingMessage(socket) {
   this.httpVersion = null;
   this.complete = false;
   this.headers = {};
+  this.rawHeaders = [];
   this.trailers = {};
+  this.rawTrailers = [];
 
   this.readable = true;
 
@@ -111,6 +113,27 @@ IncomingMessage.prototype.destroy = function(error) {
 };
 
 
+IncomingMessage.prototype._addHeaderLines = function(headers, n) {
+  if (headers && headers.length) {
+    var raw, dest;
+    if (this.complete) {
+      raw = this.rawTrailers;
+      dest = this.trailers;
+    } else {
+      raw = this.rawHeaders;
+      dest = this.headers;
+    }
+    raw.push.apply(raw, headers);
+
+    for (var i = 0; i < n; i += 2) {
+      var k = headers[i];
+      var v = headers[i + 1];
+      this._addHeaderLine(k, v, dest);
+    }
+  }
+};
+
+
 // Add the given (field, value) pair to the message
 //
 // Per RFC2616, section 4.2 it is acceptable to join multiple instances of the
@@ -118,9 +141,7 @@ IncomingMessage.prototype.destroy = function(error) {
 // multiple values this way. If not, we declare the first instance the winner
 // and drop the second. Extended header fields (those beginning with 'x-') are
 // always joined.
-IncomingMessage.prototype._addHeaderLine = function(field, value) {
-  var dest = this.complete ? this.trailers : this.headers;
-
+IncomingMessage.prototype._addHeaderLine = function(field, value, dest) {
   field = field.toLowerCase();
   switch (field) {
     // Array headers: