修复bug

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

@@ -15,13 +15,12 @@ class StrResponse private constructor(
 ) {
     fun raw() = rawResponse
 
-    val url: String
-        get() {
-            rawResponse.networkResponse?.let {
-                return it.request.url.toString()
-            }
-            return rawResponse.request.url.toString()
+    fun url(): String {
+        rawResponse.networkResponse?.let {
+            return it.request.url.toString()
         }
+        return rawResponse.request.url.toString()
+    }
 
     fun code(): Int {
         return rawResponse.code
@@ -35,8 +34,7 @@ class StrResponse private constructor(
         return rawResponse.headers
     }
 
-    val isSuccessful: Boolean
-        get() = rawResponse.isSuccessful
+    fun isSuccessful(): Boolean = rawResponse.isSuccessful
 
     fun errorBody(): ResponseBody? {
         return errorBody