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2990 // a token is exactly token_hex_len hex chars. validating before using the 2991 // value as a path keeps attacker-supplied cookies from escaping the 2992 // sessions dir (e.g. via "/" or ".." bytes). 2993 fn isToken(token_hex: []const u8) bool { 2994 if (token_hex.len != token_hex_len) return false; 2995 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 2996 return true; 2997 } 2998 }; 2999