Fixes #13919, make response->setFileToSend support non-ASCII filename.

.github/stale.yml

@@ -14,6 +14,8 @@ exemptLabels:
   - "Bug - High"
   - WIP
   - Locked
+  - "Feature - NFR"
+  - "Enhancement"
 
 # Set to true to ignore issues in a project (defaults to false)
 exemptProjects: false

phalcon/Helper/Fs.zep

@@ -0,0 +1,43 @@
+
+/**
+ * This file is part of the Phalcon.
+ *
+ * (c) Phalcon Team <team@phalcon.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Phalcon\Helper;
+
+/**
+ * This class offers file operation helper
+ */
+class Fs {
+
+    /**
+     * Gets the filename from a given path, Same as PHP's basename() but has non-ASCII support.
+     * PHP's basename() does not properly support streams or filenames beginning with a non-US-ASCII character.
+     * see https://bugs.php.net/bug.php?id=37738
+     *
+     * @param string $uri
+     * @param string $suffix
+     *
+     * @return string
+     */
+    final public static function basename(string! uri, var suffix = null) -> string
+    {
+    	var filename, matches;
+        let uri = rtrim(uri, DIRECTORY_SEPARATOR);
+        let filename = preg_match(
+        	"@[^" . preg_quote(DIRECTORY_SEPARATOR, "@") . "]+$@", 
+        	uri, 
+        	matches
+        ) ? matches[0] : "";
+        if suffix {
+        	let filename = preg_replace("@" . preg_quote(suffix, "@") . "$@", "", filename);
+        }
+
+        return filename;
+    }
+}

phalcon/Http/Response.zep

@@ -14,6 +14,7 @@ use DateTime;
 use DateTimeZone;
 use Phalcon\Di;
 use Phalcon\Di\DiInterface;
+use Phalcon\Helper\Fs;
 use Phalcon\Http\Response\Exception;
 use Phalcon\Http\Response\HeadersInterface;
 use Phalcon\Http\Response\CookiesInterface;
@@ -546,18 +547,31 @@ class Response implements ResponseInterface, InjectionAwareInterface, EventsAwar
     public function setFileToSend(string filePath, attachmentName = null, attachment = true) -> <ResponseInterface>
     {
         var basePath;
+        var basePathEncoding = "ASCII";
+        var basePathEncoded;
 
         if typeof attachmentName != "string" {
-            let basePath = basename(filePath);
+            let basePath = Fs::basename(filePath);
         } else {
             let basePath = attachmentName;
         }
-
         if attachment {
+            let basePathEncoded = rawurlencode(basePath);
+            // mbstring is a non-default extension
+            if function_exists("mb_detect_encoding") {
+                let basePathEncoding = mb_detect_encoding(
+                    basePath,
+                    mb_detect_order(),
+                    true
+                );
+            }                
             this->setRawHeader("Content-Description: File Transfer");
             this->setRawHeader("Content-Type: application/octet-stream");
-            this->setRawHeader("Content-Disposition: attachment; filename=" . basePath . ";");
+            this->setRawHeader("Content-Disposition: attachment; filename=" . basePathEncoded . ";");
             this->setRawHeader("Content-Transfer-Encoding: binary");
+            if basePathEncoding != "ASCII" {
+                this->setRawHeader("Content-Disposition: attachment; filename=" . basePathEncoded . "; filename*=". strtolower(basePathEncoding) . "''" . basePathEncoded . ";");
+            }
         }
 
         let this->file = filePath;

tests/unit/Helper/Fs/FsBasenameCest.php

@@ -0,0 +1,71 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * This file is part of the Phalcon Framework.
+ *
+ * (c) Phalcon Team <team@phalconphp.com>
+ *
+ * For the full copyright and license information, please view the LICENSE.txt
+ * file that was distributed with this source code.
+ */
+
+namespace Phalcon\Test\Unit\Helper\Fs;
+
+
+use Phalcon\Helper\Fs;
+use UnitTester;
+
+class FsBasenameCest {
+	 /**
+     * Tests Phalcon\Helper\Fs :: basename()
+     * with ASCII $uri it should be same as PHP's basename
+     * 
+     * @author Ian Hu <hu2008yinxiang@163.com>
+     * @since  2019-08-27
+     */
+    public function helperFsBasenamePureASCII(UnitTester $I) {
+    	$I->wantToTest('Helper\Fs - basename() with pure ASCII uri');
+    	$filePathAndSuffixes = [
+    		["/etc/sudoers.d", ".d"],
+    		["/etc/sudoers.d", ''],
+    		['/etc/passwd', ''],
+    		['/etc/', ''],
+    		['.', ''],
+    		['/', '']
+    	];
+
+    	foreach ($filePathAndSuffixes as $filePathAndSuffix) {
+    		list($filePath, $suffix) = $filePathAndSuffix;
+    		$I->assertEquals(
+    			basename($filePath, $suffix), 
+    			Fs::basename($filePath, $suffix)
+    		);
+    	}
+    }
+
+	 /**
+     * Tests Phalcon\Helper\Fs :: basename()
+     * with non-ASCII $uri support
+     * 
+     * @author Ian Hu <hu2008yinxiang@163.com>
+     * @since  2019-08-27
+     */
+    public function helperFsBasenameNonASCII(UnitTester $I) {
+    	$I->wantToTest('Helper\Fs - basename() with non-ASCII uri');
+    	$filePathAndExpects = [
+    		'/file/热爱中文.txt' => '热爱中文.txt',
+    		'/中文目录/热爱中文.txt' => '热爱中文.txt',
+    		'/myfolder/日本語のファイル名.txt' => '日本語のファイル名.txt',
+    		'/のファ/日本語のファイル名.txt' => '日本語のファイル名.txt',
+    		'/root/ελληνικά.txt' => 'ελληνικά.txt',
+    		'/νικά/ελληνικά.txt' => 'ελληνικά.txt'
+    	];
+    	foreach ($filePathAndExpects as $filePath => $expect) {
+    		$I->assertEquals(
+    			$expect,
+    			Fs::basename($filePath)
+    		);
+    	}
+    }
+}