✨ mime type getters

Author: codemasher

src/message_helpers.php

@@ -12,9 +12,11 @@
 use Psr\Http\Message\{MessageInterface, RequestInterface, ResponseInterface, UriInterface};
 
 use function array_filter, array_map, explode, extension_loaded, function_exists, gzdecode, gzinflate, gzuncompress, implode,
-	is_array, is_scalar, json_decode, json_encode, parse_url, preg_match, preg_replace_callback, rawurldecode,
+	is_array, is_scalar, json_decode, json_encode, parse_url, pathinfo, preg_match, preg_replace_callback, rawurldecode,
 	rawurlencode, simplexml_load_string, strtolower, trim, urlencode;
 
+use const PATHINFO_EXTENSION;
+
 const CHILLERLAN_PSR7_UTIL_INCLUDES = true;
 
 /**
@@ -123,6 +125,20 @@
 	'zip'     => 'application/zip',
 ];
 
+/**
+ * Get the mime type for the given file extension
+ */
+function getMimetypeFromExtension(string $extension):?string{
+	return MIMETYPES[strtolower($extension)] ?? null;
+}
+
+/**
+ * Get the mime type from a file name
+ */
+function getMimetypeFromFilename(string $filename):?string{
+	return getMimetypeFromExtension(pathinfo($filename, PATHINFO_EXTENSION));
+}
+
 /**
  * @param string|string[] $data
  *

tests/MessageHelpersTest.php

@@ -13,8 +13,8 @@
 use RuntimeException, TypeError;
 
 use function chillerlan\HTTP\Utils\{
-	decompress_content, get_json, get_xml, message_to_string, parseUrl, r_rawurlencode,
-	uriIsAbsolute, uriIsAbsolutePathReference, uriIsDefaultPort, uriIsNetworkPathReference,
+	decompress_content, get_json, get_xml, getMimetypeFromExtension, getMimetypeFromFilename, message_to_string,
+	parseUrl, r_rawurlencode, uriIsAbsolute, uriIsAbsolutePathReference, uriIsDefaultPort, uriIsNetworkPathReference,
 	uriIsRelativePathReference, uriWithoutQueryValue, uriWithQueryValue
 };
 
@@ -286,4 +286,10 @@ public function testParseUrl($url, $expected):void{
 		$this::assertSame($expected, parseUrl($url));
 	}
 
+	public function testGetMimetype():void{
+		$this::assertSame('application/json', getMimetypeFromExtension('json'));
+		$this::assertSame('application/json', getMimetypeFromFilename('/path/to/some/file.json'));
+		$this::assertNull(getMimetypeFromExtension('whatever'));
+	}
+
 }