fix(s3api): missing Vary: Origin header on non-CORS and OPTIONS requests (#8072)
* fix: Refactor CORS middleware to consistently apply the `Vary: Origin` header when a configuration exists and streamline request processing logic. * fix: Add Vary: Origin header to CORS OPTIONS responses and refactor request handling for clarity and correctness. * fix: update CORS middleware tests to correctly parse and check for 'Origin' in Vary header. * refactor: extract `hasVaryOrigin` helper function to simplify Vary header checks in tests. * test: Remove `Vary: Origin` header from CORS test expectations. * refactor: consolidate CORS request handling into a new `processCORS` method using a `next` callback.
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@@ -361,10 +361,6 @@ func ApplyHeaders(w http.ResponseWriter, corsResp *CORSResponse) {
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if corsResp.AllowOrigin != "" {
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w.Header().Set("Access-Control-Allow-Origin", corsResp.AllowOrigin)
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if corsResp.AllowOrigin != "*" {
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w.Header().Add("Vary", "Origin")
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}
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}
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if corsResp.AllowMethods != "" {
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