composer require slim/slim

require 'vendor/autoload.php';

$app = new SlimApp();

// 添加中間件
$app->add(new AppMiddlewareSignatureMiddleware());
$app->add(new AppMiddlewareEncryptionMiddleware());

$app->get('/', function () {
    echo "歡迎使用電子簽名和加密通信功能！";
});

$app->run();

namespace AppMiddleware;

class SignatureMiddleware
{
    public function __invoke($request, $response, $next)
    {
        // 生成電子簽名
        $signature = $this->generateSignature($request);

        // 添加簽名到請求頭
        $request = $request->withHeader('X-Signature', $signature);

        $response = $next($request, $response);

        return $response;
    }

    private function generateSignature($request)
    {
        // 根據(jù)請求內容生成簽名
        // 可以使用散列算法等方法生成簽名

        return 'signature';
    }
}

class EncryptionMiddleware
{
    public function __invoke($request, $response, $next)
    {
        $data = $request->getParsedBody();
        
        // 對請求數(shù)據(jù)進行加密處理
        $encryptedData = $this->encryptData($data);

        // 更新請求數(shù)據(jù)
        $request = $request->withParsedBody($encryptedData);

        $response = $next($request, $response);

        return $response;
    }

    private function encryptData($data)
    {
        // 對請求數(shù)據(jù)進行加密處理
        // 可以使用加密算法等方法加密數(shù)據(jù)

        return 'encrypted data';
    }
}