Added ability to get incoming headers

framework/CHANGELOG.md

@@ -93,6 +93,7 @@ Yii Framework 2 Change Log
 - Enh #1839: Added support for getting file extension and basename from uploaded file (anfrantic)
 - Enh: yii\codeception\TestCase now supports loading and using fixtures via Yii fixture framework (qiangxue)
 - Enh: Added support to parse json request data to Request::getRestParams() (cebe)
+- Enh: Added ability to get incoming headers (dizews)
 - Chg #1519: `yii\web\User::loginRequired()` now returns the `Response` object instead of exiting the application (qiangxue)
 - Chg #1586: `QueryBuilder::buildLikeCondition()` will now escape special characters and use percentage characters by default (qiangxue)
 - Chg #1610: `Html::activeCheckboxList()` and `Html::activeRadioList()` will submit an empty string if no checkbox/radio is selected (qiangxue)

framework/web/Request.php

@@ -151,6 +151,10 @@ class Request extends \yii\base\Request
 
 	private $_cookies;
 
+	/**
+	 * @var array the headers in this collection (indexed by the header names)
+	 */
+	private $_headers;
 
 	/**
 	 * Resolves the current request into a route and the associated parameters.
@@ -170,6 +174,32 @@ class Request extends \yii\base\Request
 	}
 
 	/**
+	 * Returns the header collection.
+	 * The header collection contains incoming HTTP headers.
+	 * @return HeaderCollection the header collection
+	 */
+	public function getHeaders()
+	{
+		if ($this->_headers === null) {
+			$this->_headers = new HeaderCollection;
+			if (function_exists('getallheaders')) {
+				$headers = getallheaders();
+				foreach ($headers as $name => $value) {
+					$this->_headers->add($name, $value);
+				}
+			} else {
+				foreach ($_SERVER as $name => $value) {
+					if (substr($name, 0, 5) == 'HTTP_') {
+						$name = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))));
+						$this->_headers->add($name, $value);
+					}
+				}
+			}
+		}
+		return $this->_headers;
+	}
+
+	/**
 	 * Returns the method of the current request (e.g. GET, POST, HEAD, PUT, PATCH, DELETE).
 	 * @return string request method, such as GET, POST, HEAD, PUT, PATCH, DELETE.
 	 * The value returned is turned into upper case.