diff --git a/src/function/isResponseAvailability.mjs b/src/function/isResponseAvailability.mjs
new file mode 100644
index 0000000..aac7d2e
--- /dev/null
+++ b/src/function/isResponseAvailability.mjs
@@ -0,0 +1,107 @@
+import { log } from "@nsnanocat/util";
+
+/**
+ * Determine Response Availability
+ * @author VirgilClyne
+ * @param {Object} response - Original Response Content
+ * @return {Boolean} is Available
+ */
+export default function isResponseAvailability(response = {}) {
+	log("☑️ Determine Response Availability", "");
+	log(`statusCode: ${response.statusCode}`, `headers: ${JSON.stringify(response.headers)}`, "");
+	const FORMAT = (response?.headers?.["Content-Type"] ?? response?.headers?.["content-type"])?.split(";")?.[0];
+	log("🚧 Determine Response Availability", `FORMAT: ${FORMAT}`, "");
+	let isAvailable = true;
+	switch (response?.statusCode) {
+		case 200:
+			switch (FORMAT) {
+				case "application/grpc":
+				case "application/grpc+proto":
+					switch (response?.headers?.["Grpc-Message"] ?? response?.headers?.["grpc-message"]) {
+						case "0":
+							isAvailable = true;
+							break;
+						case undefined:
+						case "": // 无内容
+							switch (response?.headers?.["content-length"] ?? response?.headers?.["content-length"]) {
+								case undefined:
+									isAvailable = true;
+									break;
+								default:
+									if (Number.parseInt(response?.headers?.["content-length"] ?? response?.headers?.["Content-Length"]) < 1400) isAvailable = false;
+									break;
+							}
+							break;
+						case "-404":
+						default:
+							isAvailable = false;
+							break;
+					}
+					break;
+				case "text/json":
+				case "application/json":
+					switch (response?.headers?.["bili-status-code"]) {
+						case "0":
+						case undefined: {
+							const data = JSON.parse(response?.body).data;
+							switch (response?.headers?.idc) {
+								case "sgp001":
+								case "sgp002":
+									switch (data?.limit) {
+										case "":
+										case undefined:
+											isAvailable = true;
+											break;
+										default:
+											isAvailable = false;
+											break;
+									}
+									break;
+								case "shjd":
+								case undefined:
+								default:
+									switch (data?.video_info?.code) {
+										case 0:
+										default:
+											isAvailable = true;
+											break;
+										case undefined:
+											isAvailable = false;
+											break;
+									}
+									switch (data?.dialog?.code) {
+										case undefined:
+											isAvailable = true;
+											break;
+										case 6010001:
+										default:
+											isAvailable = false;
+											break;
+									}
+									break;
+							}
+							break;
+						}
+						case "-404": // 啥都木有
+						case "-10403":
+						case "10015001": // 版权地区受限
+						default:
+							isAvailable = false;
+							break;
+					}
+					break;
+				case "text/html":
+					isAvailable = true;
+					break;
+			}
+			break;
+		case 403:
+		case 404:
+		case 415:
+		default:
+			isAvailable = false;
+			break;
+	}
+	log("✅ Determine Response Availability", `isAvailable:${isAvailable}`, "");
+	return isAvailable;
+}
diff --git a/src/request.dev.js b/src/request.dev.js
index 8c35ae0..66b3a0b 100644
--- a/src/request.dev.js
+++ b/src/request.dev.js
@@ -2,6 +2,7 @@ import { $platform, Lodash as _, Storage, fetch, notification, log, logError, wa
 import { gRPC } from "@nsnanocat/util";
 import database from "./function/database.mjs";
 import setENV from "./function/setENV.mjs";
+import isResponseAvailability from "./function/isResponseAvailability.mjs";
 import { WireType, UnknownFieldHandler, reflectionMergePartial, MESSAGE_TYPE, MessageType, BinaryReader, isJsonObject, typeofJsonValue, jsonWriteOptions } from "@protobuf-ts/runtime";
 import { ViewReq } from "./protobuf/bilibili/app/viewunite/v1/viewunite.js";
 import { PlayViewUniteReq } from "./protobuf/bilibili/app/playerunite/v1/playerunite.js";
@@ -450,104 +451,6 @@ log(`⚠ FORMAT: ${FORMAT}`, "");
 	});
 
 /***************** Function *****************/
-/**
- * Determine Response Availability
- * @author VirgilClyne
- * @param {Object} response - Original Response Content
- * @return {Boolean} is Available
- */
-function isResponseAvailability(response = {}) {
-	log("☑️ Determine Response Availability", "");
-	log(`statusCode: ${response.statusCode}`, `headers: ${JSON.stringify(response.headers)}`, "");
-	const FORMAT = (response?.headers?.["Content-Type"] ?? response?.headers?.["content-type"])?.split(";")?.[0];
-	log("🚧 Determine Response Availability", `FORMAT: ${FORMAT}`, "");
-	let isAvailable = true;
-	switch (response?.statusCode) {
-		case 200:
-			switch (FORMAT) {
-				case "application/grpc":
-				case "application/grpc+proto":
-					switch (response?.headers?.["Grpc-Message"] ?? response?.headers?.["grpc-message"]) {
-						case "0":
-							isAvailable = true;
-							break;
-						case undefined:
-							if (Number.parseInt(response?.headers?.["content-length"] ?? response?.headers?.["Content-Length"]) < 1200) isAvailable = false;
-							else isAvailable = true;
-							break;
-						case "-404":
-						default:
-							isAvailable = false;
-							break;
-					}
-					break;
-				case "text/json":
-				case "application/json":
-					switch (response?.headers?.["bili-status-code"]) {
-						case "0":
-						case undefined: {
-							const data = JSON.parse(response?.body).data;
-							switch (response?.headers?.idc) {
-								case "sgp001":
-								case "sgp002":
-									switch (data?.limit) {
-										case "":
-										case undefined:
-											isAvailable = true;
-											break;
-										default:
-											isAvailable = false;
-											break;
-									}
-									break;
-								case "shjd":
-								case undefined:
-								default:
-									switch (data?.video_info?.code) {
-										case 0:
-										default:
-											isAvailable = true;
-											break;
-										case undefined:
-											isAvailable = false;
-											break;
-									}
-									switch (data?.dialog?.code) {
-										case undefined:
-											isAvailable = true;
-											break;
-										case 6010001:
-										default:
-											isAvailable = false;
-											break;
-									}
-									break;
-							}
-							break;
-						}
-						case "-404": // 啥都木有
-						case "-10403":
-						case "10015001": // 版权地区受限
-						default:
-							isAvailable = false;
-							break;
-					}
-					break;
-				case "text/html":
-					isAvailable = true;
-					break;
-			}
-			break;
-		case 403:
-		case 404:
-		case 415:
-		default:
-			isAvailable = false;
-			break;
-	}
-	log("✅ Determine Response Availability", `isAvailable:${isAvailable}`, "");
-	return isAvailable;
-}
 
 /**
  * Fetch