diff --git a/app/src/main/java/io/legado/app/data/entities/rule/ContentRule.kt b/app/src/main/java/io/legado/app/data/entities/rule/ContentRule.kt
index ed0d482cb..054939d0b 100644
--- a/app/src/main/java/io/legado/app/data/entities/rule/ContentRule.kt
+++ b/app/src/main/java/io/legado/app/data/entities/rule/ContentRule.kt
@@ -11,5 +11,6 @@ data class ContentRule(
     var sourceRegex: String? = null,
     var replaceRegex: String? = null,
     var imageStyle: String? = null,  //默认大小居中,FULL最大宽度
-    var font: String? = null    //必须返回ByteArray
+    var font: String? = null,    //网页内包含的字体必须返回ByteArray
+    var correctFont: String? = null,   //正确的字体必须返回ByteArray
 ) : Parcelable
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/JsExtensions.kt b/app/src/main/java/io/legado/app/help/JsExtensions.kt
index c692be75e..c0161c2a1 100644
--- a/app/src/main/java/io/legado/app/help/JsExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/JsExtensions.kt
@@ -10,6 +10,7 @@ import io.legado.app.model.analyzeRule.AnalyzeUrl
 import io.legado.app.utils.*
 import org.jsoup.Connection
 import org.jsoup.Jsoup
+import java.io.File
 import java.net.URLEncoder
 import java.nio.charset.Charset
 import java.util.*
@@ -19,7 +20,7 @@ import java.util.*
 interface JsExtensions {
 
     /**
-     * js实现跨域访问,不能删
+     * 访问网络,返回String
      */
     fun ajax(urlStr: String): String? {
         return try {
@@ -32,6 +33,9 @@ interface JsExtensions {
         }
     }
 
+    /**
+     * 访问网络,返回Response<String>
+     */
     fun connect(urlStr: String): Any {
         return try {
             val analyzeUrl = AnalyzeUrl(urlStr)
@@ -44,7 +48,7 @@ interface JsExtensions {
     }
 
     /**
-     * js实现文件下载
+     * 实现文件下载,返回路径
      */
     fun downloadFile(content: String, url: String): String {
         val type = AnalyzeUrl(url).type ?: return "type为空，未下载"
@@ -111,6 +115,9 @@ interface JsExtensions {
             .execute()
     }
 
+    /**
+     * 网络访问post
+     */
     fun post(urlStr: String, body: String, headers: Map<String, String>): Connection.Response {
         return Jsoup.connect(urlStr)
             .sslSocketFactory(SSLHelper.unsafeSSLSocketFactory)
@@ -146,6 +153,20 @@ interface JsExtensions {
         return EncoderUtils.base64Decode(str, flags)
     }
 
+    fun base64DecodeToByteArray(str: String?): ByteArray? {
+        if (str.isNullOrBlank()) {
+            return null
+        }
+        return Base64.decode(str, Base64.DEFAULT)
+    }
+
+    fun base64DecodeToByteArray(str: String?, flags: Int): ByteArray? {
+        if (str.isNullOrBlank()) {
+            return null
+        }
+        return Base64.decode(str, flags)
+    }
+
     fun base64Encode(str: String): String? {
         return EncoderUtils.base64Encode(str, Base64.NO_WRAP)
     }
@@ -162,11 +183,16 @@ interface JsExtensions {
         return MD5Utils.md5Encode16(str)
     }
 
+    /**
+     * 时间格式化
+     */
     fun timeFormat(time: Long): String {
         return dateFormat.format(Date(time))
     }
 
-    //utf8编码转gbk编码
+    /**
+     * utf8编码转gbk编码
+     */
     fun utf8ToGbk(str: String): String {
         val utf8 = String(str.toByteArray(charset("UTF-8")))
         val unicode = String(utf8.toByteArray(), charset("UTF-8"))
@@ -193,20 +219,16 @@ interface JsExtensions {
         return str.htmlFormat()
     }
 
-    fun base64DecodeToByteArray(str: String?): ByteArray? {
-        if (str.isNullOrBlank()) {
-            return null
-        }
-        return Base64.decode(str, Base64.DEFAULT)
-    }
-
-    fun base64DecodeToByteArray(str: String?, flags: Int): ByteArray? {
-        if (str.isNullOrBlank()) {
-            return null
-        }
-        return Base64.decode(str, flags)
+    /**
+     * 读取本地文件
+     */
+    fun readFile(path: String): ByteArray? {
+        return File(path).readBytes()
     }
 
+    /**
+     * 输出调试日志
+     */
     fun log(msg: String) {
         Debug.log(msg)
     }
diff --git a/app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt b/app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt
index bb8da0789..02fcb2e3e 100644
--- a/app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt
+++ b/app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt
@@ -9,7 +9,7 @@ import kotlin.experimental.and
  * @see <a href="https://docs.microsoft.com/en-us/typography/opentype/spec/">获取详情</a>
  * @see <a href="https://photopea.github.io/Typr.js/demo/index.html">基于Javascript的TTF解析器</a>
  */
-class QueryTTF(var Font: Array<Byte>) : JsExtensions {
+class QueryTTF(var Font: ByteArray) : JsExtensions {
     private class Header {
         var majorVersion: UShort = 0u
         var minorVersion: UShort = 0u
@@ -150,7 +150,7 @@ class QueryTTF(var Font: Array<Byte>) : JsExtensions {
         lateinit var yCoordinates: ArrayList<Short>
     }
 
-    private class ByteArrayReader(var Buffer: Array<Byte>, var Index: Int) {
+    private class ByteArrayReader(var Buffer: ByteArray, var Index: Int) {
         fun ReadUIntX(len: Long): ULong {
             var result: ULong = 0u;
             for (i in 0 until len) {
diff --git a/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt b/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
index 136088f51..bf7a61475 100644
--- a/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
@@ -234,6 +234,7 @@ class BookSourceEditActivity :
             add(EditEntity("replaceRegex", cr?.replaceRegex, R.string.rule_replace_regex))
             add(EditEntity("imageStyle", cr?.imageStyle, R.string.rule_image_style))
             add(EditEntity("font", cr?.font, R.string.rule_font))
+            add(EditEntity("correctFont", cr?.font, R.string.rule_correct_font))
         }
         //发现
         val er = source?.getExploreRule()
@@ -338,6 +339,7 @@ class BookSourceEditActivity :
                 "replaceRegex" -> contentRule.replaceRegex = it.value
                 "imageStyle" -> contentRule.imageStyle = it.value
                 "font" -> contentRule.font = it.value
+                "correctFont" -> contentRule.font = it.value
             }
         }
         source.ruleSearch = searchRule
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 57f2f452a..44fad2b64 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -412,7 +412,8 @@
     <string name="rule_next_content">正文下一頁 URL 規則 (nextContentUrl)</string>
     <string name="rule_web_js">webJs</string>
     <string name="rule_source_regex">資源正則 (sourceRegex)</string>
-    <string name="rule_font">字體(font)</string>
+    <string name="rule_font">网页内嵌字體(font)</string>
+    <string name="rule_correct_font">正确字体(font)</string>
 
     <string name="source_icon">圖標 (sourceIcon)</string>
     <string name="r_articles">列表規則 (ruleArticles)</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 438097813..47622207e 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -413,7 +413,8 @@
     <string name="rule_next_content">正文下一頁URL規則(nextContentUrl)</string>
     <string name="rule_web_js">webJs</string>
     <string name="rule_source_regex">資源正則(sourceRegex)</string>
-    <string name="rule_font">字體(font)</string>
+    <string name="rule_font">网页内嵌字體(font)</string>
+    <string name="rule_correct_font">正确字体(font)</string>
 
     <string name="source_icon">圖示(sourceIcon)</string>
     <string name="r_articles">列表規則(ruleArticles)</string>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 7e5360666..8c54fd559 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -418,7 +418,8 @@
     <string name="rule_next_content">正文下一页URL规则(nextContentUrl)</string>
     <string name="rule_web_js">webJs</string>
     <string name="rule_source_regex">资源正则(sourceRegex)</string>
-    <string name="rule_font">字体(font)</string>
+    <string name="rule_font">网页内嵌字体(font)</string>
+    <string name="rule_correct_font">正确字体(font)</string>
 
     <string name="source_icon">图标(sourceIcon)</string>
     <string name="r_articles">列表规则(ruleArticles)</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index adb2d20a5..5132b8358 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -422,7 +422,8 @@
     <string name="rule_source_regex">资源正则(sourceRegex)</string>
     <string name="rule_replace_regex">替换规则(replaceRegex)</string>
     <string name="rule_image_style">图片样式(imageStyle)</string>
-    <string name="rule_font">字体(font)</string>
+    <string name="rule_font">网页内嵌字体(font)</string>
+    <string name="rule_correct_font">正确字体(font)</string>
 
     <string name="source_icon">图标(sourceIcon)</string>
     <string name="r_articles">列表规则(ruleArticles)</string>