1 files changed, 53 insertions, 0 deletions
diff --git a/lib/helpers/parseHeaders.js b/lib/helpers/parseHeaders.js
new file mode 100644
index 0000000..8af2cc7
--- /dev/null
+++ b/lib/helpers/parseHeaders.js
@@ -0,0 +1,53 @@
+'use strict';
+
+var utils = require('./../utils');
+
+// Headers whose duplicates are ignored by node
+// c.f. https://nodejs.org/api/http.html#http_message_headers
+var ignoreDuplicateOf = [
+  'age', 'authorization', 'content-length', 'content-type', 'etag',
+  'expires', 'from', 'host', 'if-modified-since', 'if-unmodified-since',
+  'last-modified', 'location', 'max-forwards', 'proxy-authorization',
+  'referer', 'retry-after', 'user-agent'
+];
+
+/**
+ * Parse headers into an object
+ *
+ * ```
+ * Date: Wed, 27 Aug 2014 08:58:49 GMT
+ * Content-Type: application/json
+ * Connection: keep-alive
+ * Transfer-Encoding: chunked
+ * ```
+ *
+ * @param {String} headers Headers needing to be parsed
+ * @returns {Object} Headers parsed into an object
+ */
+module.exports = function parseHeaders(headers) {
+  var parsed = {};
+  var key;
+  var val;
+  var i;
+
+  if (!headers) { return parsed; }
+
+  utils.forEach(headers.split('\n'), function parser(line) {
+    i = line.indexOf(':');
+    key = utils.trim(line.substr(0, i)).toLowerCase();
+    val = utils.trim(line.substr(i + 1));
+
+    if (key) {
+      if (parsed[key] && ignoreDuplicateOf.indexOf(key) >= 0) {
+        return;
+      }
+      if (key === 'set-cookie') {
+        parsed[key] = (parsed[key] ? parsed[key] : []).concat([val]);
+      } else {
+        parsed[key] = parsed[key] ? parsed[key] + ', ' + val : val;
+      }
+    }
+  });
+
+  return parsed;
+};