HTTP 301 Moved Permanently 重定向回應碼代表所請求的資源已經被明確移動到 Location 標頭所指示的 URL。瀏覽器會重新導向到此頁面，而搜尋引擎則會更新該資源的連結。用 SEO 的話來說，就是連結養分（link-juice）把你送到了新的 URL 去。
儘管規範要求當執行重新導向時，請求方法 (以及主體) 不應該被更動，但並非所有的用戶代理皆遵循它 -- 你依然可以找到具有此類漏洞的軟體。因此，推薦只使用 301 回應碼作為 GET 或 HEAD 方法的回應， 另外使用 308 Permanent Redirect 作為 POST 方法的替代，因為請求方法的更動在此狀態中是被明確禁止的。
狀態
301 Moved Permanently
範例
用戶端請求
GET /index.php HTTP/1.1 Host: www.example.org
伺服端回應
HTTP/1.1 301 Moved Permanently Location: http://www.example.org/index.asp
規範
| 規範 | 標題 |
|---|---|
| RFC 7231, section 6.4.2: 301 Moved Permanently | Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content |
瀏覽器相容性
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
301 | Chrome Full support Yes | Edge Full support 12 | Firefox Full support Yes | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
參見
308 Permanent Redirect302 Found, 臨時重新導向