Function testUnescape

internal/re/regexp_test.go:213–263

(t *testing.T, v string)

}

func testUnescape(t *testing.T, v string) string {
	// replace urlencoded characters
	var unescapeChars = [][2]string{
		{`\s`, `(\s|%09|%0A|\+)`},
		{`\(`, `(\(|%28)`},
		{`=`, `(=|%3D)`},
		{`<`, `(<|%3C)`},
		{`\*`, `(\*|%2A)`},
		{`\\`, `(\\|%2F)`},
		{`!`, `(!|%21)`},
		{`/`, `(/|%2F)`},
		{`;`, `(;|%3B)`},
		{`\+`, `(\+|%20)`},
	}

	for _, c := range unescapeChars {
		if !strings.Contains(v, c[0]) {
			continue
		}
		var pieces = strings.Split(v, c[0])

		// 修复piece中错误的\
		for pieceIndex, piece := range pieces {
			var l = len(piece)
			if l == 0 {
				continue
			}
			if piece[l-1] != '\\' {
				continue
			}

			// 计算\的数量
			var countBackSlashes = 0
			for i := l - 1; i >= 0; i-- {
				if piece[i] == '\\' {
					countBackSlashes++
				} else {
					break
				}
			}
			if countBackSlashes%2 == 1 {
				// 去掉最后一个
				pieces[pieceIndex] = piece[:len(piece)-1]
			}
		}

		v = strings.Join(pieces, c[1])
	}

	return v
}