From 289641b7d5b5804d4436dd08b58a428d5a024ac0 Mon Sep 17 00:00:00 2001
From: Xwite <1797350009@qq.com>
Date: Tue, 7 Mar 2023 18:56:21 +0800
Subject: [PATCH] fix(TextFile): throw meaningful Exception

---
 app/src/main/java/io/legado/app/model/localBook/TextFile.kt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/src/main/java/io/legado/app/model/localBook/TextFile.kt b/app/src/main/java/io/legado/app/model/localBook/TextFile.kt
index d4568b515..7f99f5aa1 100644
--- a/app/src/main/java/io/legado/app/model/localBook/TextFile.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/TextFile.kt
@@ -10,6 +10,7 @@ import io.legado.app.utils.MD5Utils
 import io.legado.app.utils.StringUtils
 import io.legado.app.utils.Utf8BomUtils
 import java.io.FileNotFoundException
+import java.lang.IllegalArgumentException
 import java.nio.charset.Charset
 import java.util.regex.Matcher
 import java.util.regex.Pattern
@@ -98,6 +99,7 @@ class TextFile(private val book: Book) {
             LocalBook.getBookInputStream(book).use { bis ->
                 val buffer = ByteArray(bufferSize)
                 val length = bis.read(buffer)
+                if (length == -1) throw IllegalArgumentException("Unexpected Empty Txt File")
                 if (book.charset.isNullOrBlank()) {
                     book.charset = EncodingDetect.getEncode(buffer.copyOf(length))
                 }