Start to implement header parsing/normalization.

There is some intentional copy/paste here until I figure out what can/should be pushed down into a base class.

lib/Cake/Network/Http/Response.php

@@ -62,6 +62,9 @@ public function __construct($headers, $content) {
 /**
  * Parses headers if necessary.
  *
+ * - Decodes the status code.
+ * - Parses and normalizes header names + values.
+ *
  * @param array $headers
  */
 	protected function _parseHeaders($headers) {
@@ -73,12 +76,26 @@ protected function _parseHeaders($headers) {
 			}
 			if (is_int($key)) {
 				list($name, $value) = explode(':', $value, 2);
-				$this->_headers[$name] = $value;
+				$name = $this->_normalizeHeader($name);
+				$this->_headers[trim($name)] = trim($value);
 				continue;
 			}
 		}
 	}
 
+/**
+ * Normalize header names to Camel-Case form.
+ *
+ * @param string $name The header name to normalize.
+ * @return string Normalized header name.
+ */
+	protected function _normalizeHeader($name) {
+		$parts = explode('-', $name);
+		$parts = array_map('strtolower', $parts);
+		$parts = array_map('ucfirst', $parts);
+		return implode('-', $parts);
+	}
+
 /**
  * Check if the response was OK
  *
@@ -128,6 +145,10 @@ public function header($name = null) {
 		if ($name === null) {
 			return $this->_headers;
 		}
+		$name = $this->_normalizeHeader($name);
+		if (!isset($this->_headers[$name])) {
+			return null;
+		}
 		return $this->_headers[$name];
 	}
 

lib/Cake/Test/TestCase/Network/Http/ResponseTest.php

@@ -22,7 +22,22 @@
 class ResponseTest extends TestCase {
 
 	public function testHeaderParsing() {
-		$this->markTestIncomplete();
+		$headers = [
+			'HTTP/1.1 200 OK',
+			'Content-Type : text/html;charset="UTF-8"',
+			'date: Tue, 25 Dec 2012 04:43:47 GMT',
+		];
+		$response = new Response($headers, 'ok');
+
+		$this->assertEquals(200, $response->statusCode());
+		$this->assertEquals(
+			'text/html;charset="UTF-8"',
+			$response->header('content-type')
+		);
+		$this->assertEquals(
+			'Tue, 25 Dec 2012 04:43:47 GMT',
+			$response->header('Date')
+		);
 	}
 
 	public function testContent() {