# 1. 生成客戶端csr和私鑰key 執(zhí)行這個(gè)指令后會生成csr文件和私鑰key
openssl req -new -nodes -sha256 -newkey rsa:2048 -keyout privateKey.key -out request.csr

# 生成csr文件后，將csr文件發(fā)送給甲方，甲方簽發(fā)了ca.pem給我們

# 后續(xù)訪問甲方接口，就一直攜帶ca.pem和本地私鑰 用于傳輸過程中的文件和數(shù)據(jù)加密;

 // 調(diào)用方法
    resp = apiService.request(true, POST, url, req);

  @Override
    public String request(Boolean ssl, HttpMethod method, String url, String reqBody) throws Exception {
        // 調(diào)用下方的request方法
        return request(ssl, method, url, null, reqBody);
    }

    //    雙向認(rèn)證請求
    @Override
    public String request(Boolean ssl, HttpMethod method, String url, MultiValueMap<String, String> params,
            String reqBody)
            throws Exception {
        logger.info("request url to server =====> {}", url);
        logger.info("request body to server =====> {}", reqBody);
        // 根據(jù)實(shí)際需求添加請求頭
        HttpHeaders headers = new HttpHeaders();
        headers.set("token", "");

        ResponseEntity<String> resp = sslService.request(ssl, url, method, headers, params, reqBody);
        String respBody = resp.getBody();
        logger.info("resp body from server =====> {}", respBody);
        return respBody;
    }

        @Override
        public ResponseEntity<String> request(Boolean ssl, String url, HttpMethod method, HttpHeaders headers,
                        MultiValueMap<String, String> params, String reqBody) throws Exception {

                HttpsClient client = !ssl ? new HttpsClient(ssl)
                                : new HttpsClient(ssl, "證書路徑", "私鑰路徑");
                return RestClientUtil.request(client, url, method, headers, params, reqBody);

        }

        /**
         * @Description //HTTPS通信雙向認(rèn)證工具類
         **/

        @Data
        public class HttpsClient {
        
            // true-啟用雙向認(rèn)證，false-不啟用
            private boolean ssl;
            // 服務(wù)端公鑰
            private String serverPem;
            // 客戶端私鑰
            private String clientSK;

            public HttpsClient() {
            }

            public HttpsClient(Boolean ssl) {
                this.ssl = ssl;
            }

            public HttpsClient(Boolean ssl, String serverPem, String clientSK) {
                this.ssl = ssl;
                this.serverPem = serverPem;
                this.clientSK = clientSK;
            }

}

public static ResponseEntity<String> request(HttpsClient client, String url, HttpMethod method,
            HttpHeaders httpHeaders,
            MultiValueMap<String, String> params,
            String reqBody) throws Exception {
        httpHeaders.set("Content-Type", "application/json; charset=utf-8");
        HttpEntity<?> requestEntity = new HttpEntity<>(reqBody, httpHeaders);

        UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url).queryParams(params);
//        UriComponentsBuilder builder = UriComponentsBuilder.fromUriString(url).queryParams(params);
        RestTemplate rest = client.isSsl()
                ? new RestTemplate(HttpsClientUtil.rsaHttpComponentsClientHttpRequestFactory(client))
                : new RestTemplate(generateHttpRequestFactory());
        return rest.exchange(builder.toUriString(), method, requestEntity, String.class);
    }

  /**
     * 忽略SSL證書
     *
     * @return
     */
    private static HttpComponentsClientHttpRequestFactory generateHttpRequestFactory() {

        TrustStrategy acceptingTrustStrategy = (x509Certificates, authType) -> true;

        SSLContext sslContext = null;

        try {

            sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

        } catch (KeyManagementException e) {

            e.printStackTrace();

        } catch (KeyStoreException e) {

            e.printStackTrace();

        }

        SSLConnectionSocketFactory connectionSocketFactory = new SSLConnectionSocketFactory(sslContext,
                new NoopHostnameVerifier());

        HttpClientBuilder httpClientBuilder = HttpClients.custom();

        httpClientBuilder.setSSLSocketFactory(connectionSocketFactory);

        CloseableHttpClient httpClient = httpClientBuilder.build();

        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();

        factory.setHttpClient(httpClient);

        return factory;
    }

 public static HttpComponentsClientHttpRequestFactory rsaHttpComponentsClientHttpRequestFactory(HttpsClient client)
            throws Exception {
        // 獲取httpClient對象，防止重復(fù)創(chuàng)建--讀取證書信息，對象生成后不做其他操作所以未加鎖
        if (httpClient == null) {
            httpClient = createCloseableHttpClientByRsa(client);
        }
        HttpComponentsClientHttpRequestFactory httpsFactory = new HttpComponentsClientHttpRequestFactory(httpClient);
//        httpsFactory.setReadTimeout(5000);
//        httpsFactory.setConnectTimeout(5000);
        httpsFactory.setReadTimeout(60 * 1000);
        httpsFactory.setConnectTimeout(60 * 1000);
        return httpsFactory;
    }