优化

app/src/main/java/io/legado/app/help/http/HttpHelper.kt

@@ -49,11 +49,12 @@ object HttpHelper {
         return null
     }
 
-    fun getBytes(url: String): ByteArray? {
+    fun getBytes(url: String, refer: String): ByteArray? {
         NetworkUtils.getBaseUrl(url)?.let { baseUrl ->
+            val headers = mapOf(Pair(AppConst.UA_NAME, AppConst.userAgent), Pair("refer", refer))
             return getByteRetrofit(baseUrl)
                 .create(HttpGetApi::class.java)
-                .getMapByte(url, mapOf(), mapOf(Pair(AppConst.UA_NAME, AppConst.userAgent)))
+                .getMapByte(url, mapOf(), headers)
                 .execute()
                 .body()
         }

app/src/main/java/io/legado/app/ui/book/read/page/provider/ImageProvider.kt

@@ -29,7 +29,7 @@ object ImageProvider {
                     out.close()
                 }
             } else {
-                HttpHelper.getBytes(src)?.let {
+                HttpHelper.getBytes(src, src)?.let {
                     FileUtils.createFileIfNotExist(vFile.absolutePath).writeBytes(it)
                 }
             }