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- // Copyright 2023 The Gitea Authors. All rights reserved.
- // SPDX-License-Identifier: MIT
-
- package common
-
- import (
- "net/http"
-
- "code.gitea.io/gitea/modules/httplib"
- )
-
- // FetchRedirectDelegate helps the "fetch" requests to redirect to the correct location
- func FetchRedirectDelegate(resp http.ResponseWriter, req *http.Request) {
- // When use "fetch" to post requests and the response is a redirect, browser's "location.href = uri" has limitations.
- // 1. change "location" from old "/foo" to new "/foo#hash", the browser will not reload the page.
- // 2. when use "window.reload()", the hash is not respected, the newly loaded page won't scroll to the hash target.
- // The typical page is "issue comment" page. The backend responds "/owner/repo/issues/1#comment-2",
- // then frontend needs this delegate to redirect to the new location with hash correctly.
- redirect := req.PostFormValue("redirect")
- if httplib.IsRiskyRedirectURL(redirect) {
- resp.WriteHeader(http.StatusBadRequest)
- return
- }
- resp.Header().Add("Location", redirect)
- resp.WriteHeader(http.StatusSeeOther)
- }
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