From b3506a292490e78c558148f2e7ebf46dfc19f58a Mon Sep 17 00:00:00 2001
From: cyfung1031 <44498510+cyfung1031@users.noreply.github.com>
Date: Sun, 22 Mar 2026 11:36:06 +0900
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=AD=A3=20fetchScriptBody=20?=
 =?UTF-8?q?=E7=9A=84=20Accept=20=E8=AE=BE=E5=AE=9A=EF=BC=8C=E9=81=BF?=
 =?UTF-8?q?=E5=85=8D=E8=A7=A6=E5=8F=91=20Error=20406?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/pages/install/App.tsx | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/pages/install/App.tsx b/src/pages/install/App.tsx
index 6bbb48d51..b9c4020c4 100644
--- a/src/pages/install/App.tsx
+++ b/src/pages/install/App.tsx
@@ -67,7 +67,8 @@ const fetchScriptBody = async (url: string, { onProgress }: { [key: string]: any
   const response = await fetch(url, {
     headers: {
       "Cache-Control": "no-cache",
-      Accept: "text/javascript,application/javascript,text/plain,application/octet-stream,application/force-download",
+      /* 不指定 application/octet-stream 和 application/force-download 避免触发伺服器端 Error 406 */
+      Accept: "text/javascript, application/javascript, */*", // prefer JavaScript, but anything is acceptable
       // 参考：加权 Accept-Encoding 值说明
       // https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Accept-Encoding#weighted_accept-encoding_values
       "Accept-Encoding": "br;q=1.0, gzip;q=0.8, *;q=0.1",
@@ -83,8 +84,21 @@ const fetchScriptBody = async (url: string, { onProgress }: { [key: string]: any
   if (!response.body || !response.headers) {
     throw new Error("No response body or headers");
   }
-  if (response.headers.get("content-type")?.includes("text/html")) {
-    throw new Error("Response is text/html, not a valid UserScript");
+  const contentType = response.headers.get("content-type");
+
+  if (contentType) {
+    // 不接受非 JavaScript文本 的回应
+    const contentTypeLower = contentType.toLowerCase();
+    const m = /^\s*([\w-]+)[^\w-]+([\w-]+)/.exec(contentTypeLower);
+    if (m) {
+      const contentTypeOK =
+        (m[2] === "javascript" && (m[1] === "text" || m[1] === "application")) ||
+        (m[1] === "application" && (m[2] === "octet-stream" || m[2] === "force-download"));
+      if (!contentTypeOK) {
+        throw new Error(`Response is ${contentType}, not a valid UserScript`);
+        // e.g. Response is text/html, not a valid UserScript
+      }
+    }
   }
 
   const reader = response.body.getReader();
@@ -113,7 +127,6 @@ const fetchScriptBody = async (url: string, { onProgress }: { [key: string]: any
   }
 
   // 检测编码：优先使用 Content-Type，回退到 chardet（仅检测前16KB）
-  const contentType = response.headers.get("content-type");
   const encode = detectEncoding(chunksAll, contentType);
 
   // 使用检测到的 charset 解码