diff --git a/app/src/main/java/io/legado/app/data/AppDatabase.kt b/app/src/main/java/io/legado/app/data/AppDatabase.kt
index ee30c1cc4..4b537d59c 100644
--- a/app/src/main/java/io/legado/app/data/AppDatabase.kt
+++ b/app/src/main/java/io/legado/app/data/AppDatabase.kt
@@ -1,20 +1,26 @@
 package io.legado.app.data
 
 import android.content.Context
+import android.database.Cursor
 import androidx.room.Database
 import androidx.room.Room
 import androidx.room.RoomDatabase
 import androidx.room.migration.Migration
 import androidx.sqlite.db.SupportSQLiteDatabase
+import com.google.gson.JsonArray
+import com.google.gson.JsonObject
 import io.legado.app.data.dao.*
 import io.legado.app.data.entities.*
+import io.legado.app.help.FileHelp
+import io.legado.app.utils.GSON
+import java.io.File
 
 
 @Database(
     entities = [Book::class, BookGroup::class, BookSource::class, BookChapter::class, ReplaceRule::class,
         SearchBook::class, SearchKeyword::class, Cookie::class, RssSource::class, Bookmark::class,
         RssArticle::class],
-    version = 1,
+    version = 2,
     exportSchema = true
 )
 abstract class AppDatabase : RoomDatabase() {
@@ -22,31 +28,45 @@ abstract class AppDatabase : RoomDatabase() {
     companion object {
         private const val DATABASE_NAME = "legado.db"
 
-        private val MIGRATION_1_2: Migration = object : Migration(1, 2) {
+        private val MIGRATION_1_N: Migration = object : Migration(1, 2) {
             override fun migrate(database: SupportSQLiteDatabase) {
-                database.run {
-                    // execSQL("ALTER TABLE parsers ADD COLUMN fulltextScript TEXT")
-                    // execSQL("ALTER TABLE feeds ADD COLUMN lastUpdateTime INTEGER NOT NULL DEFAULT 0")
-                    // execSQL("DELETE FROM entries WHERE rowid NOT IN (SELECT MIN(rowid) FROM entries GROUP BY link)")
-                    // execSQL("CREATE UNIQUE INDEX index_entries_link ON entries(link)")
-                }
+                backup(database)
             }
         }
 
         fun createDatabase(context: Context): AppDatabase {
-            return Room.databaseBuilder(
-                context.applicationContext,
-                AppDatabase::class.java,
-                DATABASE_NAME
-            )
-                // .addMigrations(MIGRATION_1_2)
-                // .addMigrations(MIGRATION_2_3)
-                // .addMigrations(MIGRATION_3_4)
-                // .addMigrations(MIGRATION_4_5)
-                // .addMigrations(MIGRATION_5_6)
+            return Room.databaseBuilder(context, AppDatabase::class.java, DATABASE_NAME)
+//                .fallbackToDestructiveMigration()
+                .addMigrations(MIGRATION_1_N)
                 .build()
         }
 
+        private fun backup(database: SupportSQLiteDatabase) {
+            val forms = arrayOf("books")
+            forms.forEach { form ->
+                database.query("select * from $form").let {
+                    val ja = JsonArray()
+                    while (it.moveToNext()) {
+                        val jo = JsonObject()
+                        for (i in 0 until it.columnCount) {
+                            if (!it.isNull(i)) {
+                                when (it.getType(i)) {
+                                    Cursor.FIELD_TYPE_FLOAT ->
+                                        jo.addProperty(it.getColumnName(i), it.getFloat(i))
+                                    Cursor.FIELD_TYPE_INTEGER ->
+                                        jo.addProperty(it.getColumnName(i), it.getInt(i))
+                                    else -> jo.addProperty(it.getColumnName(i), it.getString(i))
+                                }
+                            }
+                        }
+                        ja.add(jo)
+                    }
+                    it.close()
+                    FileHelp.getFile(FileHelp.getCachePath() + File.separator + "db" + File.separator + form + ".json")
+                        .writeText(GSON.toJson(ja))
+                }
+            }
+        }
     }
 
     abstract fun bookDao(): BookDao
diff --git a/app/src/main/java/io/legado/app/ui/rss/read/ReadRssActivity.kt b/app/src/main/java/io/legado/app/ui/rss/read/ReadRssActivity.kt
index 928f8b04e..e797da671 100644
--- a/app/src/main/java/io/legado/app/ui/rss/read/ReadRssActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/rss/read/ReadRssActivity.kt
@@ -64,7 +64,7 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
         })
         viewModel.contentLiveData.observe(this, Observer { content ->
             viewModel.rssArticleLiveData.value?.let {
-                val url = NetworkUtils.getAbsoluteURL(it.origin, it.link ?: "")
+                val url = NetworkUtils.getAbsoluteURL(it.origin, it.link)
                 if (viewModel.rssSourceLiveData.value?.loadWithBaseUrl == true) {
                     webView.loadDataWithBaseURL(
                         url,
diff --git a/app/src/main/java/io/legado/app/ui/rss/source/edit/RssSourceEditActivity.kt b/app/src/main/java/io/legado/app/ui/rss/source/edit/RssSourceEditActivity.kt
index c993073ef..2599fe1f3 100644
--- a/app/src/main/java/io/legado/app/ui/rss/source/edit/RssSourceEditActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/rss/source/edit/RssSourceEditActivity.kt
@@ -131,11 +131,11 @@ class RssSourceEditActivity :
             add(EditEntity("ruleNextPage", rssSource?.ruleNextPage, R.string.r_next))
             add(EditEntity("ruleTitle", rssSource?.ruleTitle, R.string.r_title))
             add(EditEntity("rulePubDate", rssSource?.rulePubDate, R.string.r_date))
-            add(EditEntity("ruleCategories", rssSource?.ruleCategories, R.string.r_categories))
             add(EditEntity("ruleDescription", rssSource?.ruleDescription, R.string.r_description))
             add(EditEntity("ruleImage", rssSource?.ruleImage, R.string.r_image))
             add(EditEntity("ruleLink", rssSource?.ruleLink, R.string.r_link))
             add(EditEntity("ruleContent", rssSource?.ruleContent, R.string.r_content))
+            add(EditEntity("header", rssSource?.header, R.string.source_http_header))
         }
         adapter.editEntities = sourceEntities
     }
@@ -155,11 +155,11 @@ class RssSourceEditActivity :
                 "ruleNextPage" -> source.ruleNextPage = it.value
                 "ruleTitle" -> source.ruleTitle = it.value
                 "rulePubDate" -> source.rulePubDate = it.value
-                "ruleCategories" -> source.ruleCategories = it.value
                 "ruleDescription" -> source.ruleDescription = it.value
                 "ruleImage" -> source.ruleImage = it.value
                 "ruleLink" -> source.ruleLink = it.value
                 "ruleContent" -> source.ruleContent = it.value
+                "header" -> source.header = it.value
             }
         }
         return source