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