优化

app/src/main/java/io/legado/app/model/webBook/WebBook.kt

@@ -41,8 +41,11 @@ object WebBook {
         key: String,
         page: Int? = 1,
     ): ArrayList<SearchBook> {
+        val searchUrl = bookSource.searchUrl
+        if (searchUrl.isNullOrBlank()) {
+            throw NoStackTraceException("搜索url不能为空")
+        }
         val ruleData = RuleData()
-        bookSource.searchUrl?.let { searchUrl ->
         val analyzeUrl = AnalyzeUrl(
             mUrl = searchUrl,
             key = key,
@@ -69,8 +72,6 @@ object WebBook {
             isSearch = true
         )
     }
-        return arrayListOf()
-    }
 
     /**
      * 发现