Fix #27: Allow case-insensitive access to request headers and response headers

src/Curl.class.php

@@ -204,7 +204,7 @@ class Curl {
 
     private function _parseHeaders($raw_headers) {
         $raw_headers = preg_split('/\r\n/', $raw_headers, null, PREG_SPLIT_NO_EMPTY);
-        $http_headers = array();
+        $http_headers = new CaseInsensitiveArray();
 
         for ($i = 1; $i < count($raw_headers); $i++) {
             list($key, $value) = explode(':', $raw_headers[$i], 2);
@@ -305,6 +305,40 @@ class Curl {
     }
 }
 
+class CaseInsensitiveArray implements ArrayAccess, Countable {
+    private $container = array();
+
+    public function offsetSet($offset, $value) {
+        if (is_null($offset)) {
+            $this->container[] = $value;
+        }
+        else {
+            $index = array_search(strtolower($offset), array_keys(array_change_key_case($this->container, CASE_LOWER)));
+            if (!($index === false)) {
+                unset($this->container[array_keys($this->container)[$index]]);
+            }
+            $this->container[$offset] = $value;
+        }
+    }
+
+    public function offsetExists($offset) {
+        return array_key_exists(strtolower($offset), array_change_key_case($this->container, CASE_LOWER));
+    }
+
+    public function offsetUnset($offset) {
+        unset($this->container[$offset]);
+    }
+
+    public function offsetGet($offset) {
+        $index = array_search(strtolower($offset), array_keys(array_change_key_case($this->container, CASE_LOWER)));
+        return $index === false ? null : array_values($this->container)[$index];
+    }
+
+    public function count() {
+        return count($this->container);
+    }
+}
+
 function is_array_assoc($array) {
     return (bool)count(array_filter(array_keys($array), 'is_string'));
 }