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Deprecate "back" magic string in redirects #5935

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merged 2 commits into from
Sep 11, 2024
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Merged

Deprecate "back" magic string in redirects #5935

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c88b4e4
Deprecate back magic string
blakeembrey Sep 10, 2024
b663715
Use short URL
blakeembrey Sep 11, 2024
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5 changes: 5 additions & 0 deletions History.md
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Original file line number Diff line number Diff line change
@@ -1,3 +1,8 @@
unreleased
==========

* Deprecate `res.location("back")` and `res.redirect("back")` magic string

4.20.0 / 2024-09-10
==========
* deps: [email protected]
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1 change: 1 addition & 0 deletions lib/response.js
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Expand Up @@ -916,6 +916,7 @@ res.location = function location(url) {

// "back" is an alias for the referrer
if (url === 'back') {
deprecate('res.location("back"): use res.location(req.get("Referrer") || "/") and refer to https://expressjs.com/en/advanced/best-practice-security.html#prevent-open-redirects for best practices');
loc = this.req.get('Referrer') || '/';
} else {
loc = String(url);
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