OkHttp3 发送Digest Auth摘要认证

本文主要是介绍OkHttp3 发送Digest Auth摘要认证，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

注意OkHttp3 自带的Digest Auth 认证存在循环请求：部分请求如下所示：

private static void digestAuth(ApiRequestVo apiRequestVo,Request.Builder requestBuilder,OkHttpClient.Builder okHttpClientBuilder){List<Map<String, Object>> authParams = apiRequestVo.getAuthParams();Map<String,String> map = new HashMap<>();for (Map<String, Object> authParam : authParams) {String value = String.valueOf(authParam.get(Params.VALUE)).trim();if (StringUtils.isNotEmpty(value)){map.put(String.valueOf(authParam.get(Params.NAME)).trim(),value);}}if (map.size() == 2){//这里需要来两次请求String username = map.get(Params.USERNAME);String password = map.get(Params.PASSWORD);okHttpClientBuilder.retryOnConnectionFailure(true).connectTimeout(15, TimeUnit.SECONDS).authenticator(new DigestAuthenticator(username,password)).followRedirects(false);}}

如果这么传入会出现 Too many follow-up requests: 21这个错误。根据Digest Auth自身请求规则，第一次是客户端传过来的认证key，第二次根据key继续请求。
详细数据如下：
第一次：
在这里插入图片描述

第二次：
在这里插入图片描述

那么根据两次发送原则我们进行分解，由我们自己操控：

    @Testpublic void digestAuth(){OkHttpClient.Builder okHttpClientBuilder = new OkHttpClient.Builder();Request.Builder requestBuilder = new Request.Builder();String URL = "http://127.0.0.1:8082/digestAuth/info";requestBuilder.url(URL);Request request = requestBuilder.build();OkHttpClient client = okHttpClientBuilder.build();ApiResult apiResult = null;try {Response response = client.newCall(request).execute();String header = response.header("WWW-Authenticate");System.out.println(response);DigestScheme mDigestScheme = new DigestScheme();UsernamePasswordCredentials mCredentials = new UsernamePasswordCredentials("admin", "admin");mDigestScheme.processChallenge(new BasicHeader("WWW-Authenticate", response.header("WWW-Authenticate")));org.apache.http.HttpRequest request111 = new BasicHttpRequest(response.request().method(),response.request().url().toString());String authHeader;authHeader = mDigestScheme.authenticate(mCredentials, request111).getValue();requestBuilder.header("Authorization",authHeader);Response response1 = client.newCall(requestBuilder.build()).execute();System.out.println(response1);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (MalformedChallengeException e) {throw new RuntimeException(e);} catch (AuthenticationException e) {throw new RuntimeException(e);}}