From 59c7b148ddc1d236c3830ba4bed76e8b2bea3fe5 Mon Sep 17 00:00:00 2001
From: Pang <aipaw@live.cn>
Date: Tue, 26 Mar 2024 10:17:49 +0800
Subject: [PATCH] =?UTF-8?q?perf:=20=E6=B6=88=E6=81=AF=E6=94=AF=E6=8C=81sty?=
 =?UTF-8?q?le?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/Models/WebSocketDialogMsg.php | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/app/Models/WebSocketDialogMsg.php b/app/Models/WebSocketDialogMsg.php
index b34962cb0..ef4bd79d0 100644
--- a/app/Models/WebSocketDialogMsg.php
+++ b/app/Models/WebSocketDialogMsg.php
@@ -779,7 +779,20 @@ class WebSocketDialogMsg extends AbstractModel
         }
         // 过滤标签
         $text = strip_tags($text, '<blockquote> <strong> <pre> <ol> <ul> <li> <em> <p> <s> <u> <a>');
-        $text = preg_replace("/\<(blockquote|strong|pre|ol|ul|li|em|p|s|u).*?\>/is", "<$1>", $text);    // 不用去除a标签，上面已经处理过了
+        $text = preg_replace_callback("/\<(blockquote|strong|pre|ol|ul|li|em|p|s|u)(.*?)\>/is", function (array $match) {    // 不用去除a标签，上面已经处理过了
+            preg_match("/<[^>]*?style=([\"'])(.*?)\\1[^>]*?>/is", $match[0], $matchs);
+            $attach = '';
+            if ($matchs) {
+                $styleArray = explode(';', $matchs[2]);
+                $validStyles = array_filter($styleArray, function ($styleItem) {
+                    return preg_match('/\s*(?:color|font-size|background-color|font-weight|font-family|text-decoration|font-style)\s*:/i', $styleItem); // 只保留指定样式
+                });
+                if ($validStyles) {
+                    $attach = ' style="' . implode(';', $validStyles) . '"';
+                }
+            }
+            return "<{$match[1]}{$attach}>";
+        }, $text);
         $text = preg_replace_callback("/\[:LINK:(.*?):(.*?):\]/i", function (array $match) {
             return "<a href=\"" . base64_decode($match[1]) . "\" target=\"_blank\">" . base64_decode($match[2]) . "</a>";
         }, $text);