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28 lines
935 B
Go
28 lines
935 B
Go
// Copyright 2026 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package middleware
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import (
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestParseAcceptLanguage(t *testing.T) {
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// a normal header is parsed and its leading language preserved
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tags := parseAcceptLanguage("de-DE,de;q=0.9,en;q=0.8")
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assert.NotEmpty(t, tags)
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assert.Equal(t, "de-DE", tags[0].String())
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// an oversized "_"-separated header would drive ParseAcceptLanguage into its
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// quadratic-time path (the built-in guard only counts "-"); the length bound
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// keeps the input passed to the parser small so it cannot be used for a DoS.
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malicious := strings.Repeat("_aaaaaaaaa", 1<<16) // ~640 KiB, zero "-" characters
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assert.Greater(t, len(malicious), maxAcceptLanguageLen)
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tags = parseAcceptLanguage(malicious)
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// no panic / hang, and nothing meaningful is parsed out of the garbage
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assert.Empty(t, tags)
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}
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