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system/HTTP/Message.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\HTTP;
+
+/**
+ * An HTTP message
+ */
+class Message implements MessageInterface
+{
+    use MessageTrait;
+
+    /**
+     * Protocol version
+     *
+     * @var string
+     */
+    protected $protocolVersion;
+
+    /**
+     * List of valid protocol versions
+     *
+     * @var array
+     */
+    protected $validProtocolVersions = [
+        '1.0',
+        '1.1',
+        '2.0',
+    ];
+
+    /**
+     * Message body
+     *
+     * @var mixed
+     */
+    protected $body;
+
+    /**
+     * Returns the Message's body.
+     *
+     * @return mixed
+     */
+    public function getBody()
+    {
+        return $this->body;
+    }
+
+    /**
+     * Returns an array containing all headers.
+     *
+     * @return array<string, Header> An array of the request headers
+     *
+     * @deprecated Use Message::headers() to make room for PSR-7
+     *
+     * @codeCoverageIgnore
+     */
+    public function getHeaders(): array
+    {
+        return $this->headers();
+    }
+
+    /**
+     * Returns a single header object. If multiple headers with the same
+     * name exist, then will return an array of header objects.
+     *
+     * @return array|Header|null
+     *
+     * @deprecated Use Message::header() to make room for PSR-7
+     *
+     * @codeCoverageIgnore
+     */
+    public function getHeader(string $name)
+    {
+        return $this->header($name);
+    }
+
+    /**
+     * Determines whether a header exists.
+     */
+    public function hasHeader(string $name): bool
+    {
+        $origName = $this->getHeaderName($name);
+
+        return isset($this->headers[$origName]);
+    }
+
+    /**
+     * Retrieves a comma-separated string of the values for a single header.
+     *
+     * This method returns all of the header values of the given
+     * case-insensitive header name as a string concatenated together using
+     * a comma.
+     *
+     * NOTE: Not all header values may be appropriately represented using
+     * comma concatenation. For such headers, use getHeader() instead
+     * and supply your own delimiter when concatenating.
+     */
+    public function getHeaderLine(string $name): string
+    {
+        $origName = $this->getHeaderName($name);
+
+        if (! array_key_exists($origName, $this->headers)) {
+            return '';
+        }
+
+        return $this->headers[$origName]->getValueLine();
+    }
+
+    /**
+     * Returns the HTTP Protocol Version.
+     */
+    public function getProtocolVersion(): string
+    {
+        return $this->protocolVersion ?? '1.1';
+    }
+}