在系统开发过程中，系统与系统之间往往不是完全独立的，需要进行互相调用

黄金段位：直接http访问api接口，获取相关数据

钻石段位：定义接口规范，发放授权，api接口需要认证授权才能访问

星耀段位：提供sdk客户端，封装调用api接口所需要的加解密以及http访问的工具类

王者段位：sdk进一步封装，封装成近似本地调用的api接口，调用方只需配置appId,appSecret,接口域名即可，采用springboot自动装配，开发自己的starter

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一、黄金段位接口交互

 public String doPost(String host, String uri, String body, String method) {try {String address = host + uri;URL restServiceURL = new URL(address);HttpURLConnection httpConnection = (HttpURLConnection) restServiceURL.openConnection();httpConnection.setRequestMethod(method);httpConnection.setDoOutput(true);httpConnection.setDoInput(true);httpConnection.setRequestProperty("Content-Type", "application/json");OutputStream outputStream = httpConnection.getOutputStream();outputStream.write(body.getBytes(StandardCharsets.UTF_8));outputStream.flush();if (httpConnection.getResponseCode() != 200) {throw new RuntimeException("Failed : HTTP outor code : " + httpConnection.getResponseCode());}BufferedReader responseBuffer = new BufferedReader(new InputStreamReader(httpConnection.getInputStream(), "UTF-8"));StringBuilder output = new StringBuilder();do {output.append(responseBuffer.readLine());} while (responseBuffer.read() != -1);httpConnection.disconnect();return output.toString();} catch (Exception e) {LOGGER.error("请求post接口报错：{}", e);}return null;}

二、钻石段位接口交互设计

1.接口文档定义

账号：appId; 授权密钥：appSecret;http每次请求header中需要添加appId、randomcode、timestamp、encodekey、sign五个参数，接口将使用这五个参数进行鉴权判断请求方式是否可以使用当前API

序号	参数名	参数类型	值	描述	值(样例)
1	appId	String	必填	授权帐号	liangxi.zeng
2	randomcode	String	必填	随机生成的字符串（每次可不相同）	2sd4TeSk
3	timestamp	String	必填	当前时间戳	20150917160500
4	encodekey	String	必填	前三个参数拼在一起后加上SIM授权的密钥appSecret作为salt使用SHA-256算法进行加密	8729e01cb547sdc3ea645aaa9f8493ab251e5ef32c3d6628cf85f985319145e3
5	sign	String	必填	签名信息，采用MD5加密，计算公式接口：sign=MD5(uri&body&appSecret),有些接口可能没有body，参数是在URL中，则将body置为空串进行签名
6	appSecret	String	必填	加解密双方约定自定义的字符串，用作加密，不能直接放入header	o10ympt70x8gqas8hpoctopk3lwrdfd
7	Content-Type	String	必填	参数提交方式	application/Json

 

2.工具类以及demo提供

a.调用方部分代码

加解密工具类DigestUtilspublicvoid setHeader(HttpURLConnection httpConnection,String uri,String body,String method) throws ProtocolException {httpConnection.setRequestMethod(method);httpConnection.setDoOutput(true);httpConnection.setDoInput(true);httpConnection.setRequestProperty("Content-Type", "application/json");httpConnection.setRequestProperty("appId", appId);String randomCode = RandomStringUtils.random(16, true, true);httpConnection.setRequestProperty("randomcode", randomCode);String dateNow = DateUtil.format(DateUtil.date(), "yyyyMMddHHmmss");httpConnection.setRequestProperty("timestamp", dateNow);//加密String encodeKey = DigestUtils.sha256Hex(StringUtils.join(appUser, randomCode, dateNow, "{", privateKey, "}"));httpConnection.setRequestProperty("encodekey", encodeKey);//签名String sign = DigestUtils.md5Hex(StringUtils.join(uri, "&", body, "&", privateKey));httpConnection.setRequestProperty("sign", sign.toUpperCase(Locale.ROOT));}public String doPost(String host, String uri, String body, String method) {try {String address = host + uri;URL restServiceURL = new URL(address);HttpURLConnection httpConnection = (HttpURLConnection) restServiceURL.openConnection();//设置加解密参数认证参数setHeader(httpConnection,url,body,method);OutputStream outputStream = httpConnection.getOutputStream();outputStream.write(body.getBytes(StandardCharsets.UTF_8));outputStream.flush();if (httpConnection.getResponseCode() != 200) {throw new RuntimeException("Failed : HTTP outor code : " + httpConnection.getResponseCode());}BufferedReader responseBuffer = new BufferedReader(new InputStreamReader(httpConnection.getInputStream(), "UTF-8"));StringBuilder output = new StringBuilder();do {output.append(responseBuffer.readLine());} while (responseBuffer.read() != -1);httpConnection.disconnect();return output.toString();} catch (Exception e) {LOGGER.error("请求post接口报错：{}", e);}return null;}

b.被调用方

对请求头里传入的参数进行一一校验即可，设计成过滤器拦截，提供给外部的接口都需要认证鉴权

三.星耀段位接口访问设计

1.在钻石段位的基础上，进行sdk的封装

     a.maven引入

<dependency><groupId>com.tcl.api.auth</groupId><artifactId>auth-util</artifactId><version>2.2.0-RELEASE<</version>
</dependency>

   b.sdk包含工具类

/*** api 访问工具类* @author liangxi.zeng*/
@Slf4j
public class ApiHttpUtils {/*** 设置请求同* @param httpConnection* @param uri* @param appId* @param body* @param method* @throws ProtocolException*/private static void setRequestHeader(HttpURLConnection httpConnection, String uri,String appId,String appSecret, String body, String method) throws ProtocolException {httpConnection.setRequestMethod(method);httpConnection.setDoOutput(true);httpConnection.setDoInput(true);httpConnection.setRequestProperty("Content-Type", "application/json");httpConnection.setRequestProperty("appuser", appId);String randomCode = RandomStringUtils.random(16, true, true);httpConnection.setRequestProperty("randomcode", randomCode);log.debug("randomcode:{}", randomCode);String dateNow = DateUtil.format(DateUtil.date(), "yyyyMMddHHmmss'Z'");log.debug("dateNow:{}", dateNow);httpConnection.setRequestProperty("timestamp", dateNow);//加密String encodeKey = DigestUtils.sha256Hex(StringUtils.join(appId, randomCode, dateNow, "{", appSecret, "}"));log.debug("encodeKey:{}", encodeKey);httpConnection.setRequestProperty("encodekey", encodeKey);//签名String sign = DigestUtils.md5Hex(StringUtils.join(uri, "&", body, "&", appSecret));log.debug("sign:{}", sign);httpConnection.setRequestProperty("sign", sign.toUpperCase(Locale.ROOT));}/*** 发送post请求* @param host* @param uri* @param body* @return*/public static String doPost(String host, String uri, String body,String appId,String appSecret) {try {String address = host + uri;log.debug("appuser:{},privateket:{},address:{}", appId, appSecret,address);URL restServiceURL = new URL(address);HttpURLConnection httpConnection = (HttpURLConnection) restServiceURL.openConnection();setRequestHeader(httpConnection,uri,body,appId,appSecret,"POST");return getResponse(httpConnection,body);} catch (Exception e) {log.error("请求idm post接口报错：{}", e);}return null;}/*** 发送post请求* @param host* @param uri* @param body* @return*/public static String doGet(String host, String uri, String body,String appId,String appSecret) {try {String address = host + uri;log.debug("appuser:{},privateket:{},address:{}", appId, appSecret,address);URL restServiceURL = new URL(address);HttpURLConnection httpConnection = (HttpURLConnection) restServiceURL.openConnection();setRequestHeader(httpConnection,uri,body,appId,appSecret,"GET");return getResponse(httpConnection,body);} catch (Exception e) {log.error("请求idm post接口报错：{}", e);}return null;}/*** 获取响应内容* @param httpConnection* @param body* @return* @throws IOException*/private static String getResponse(HttpURLConnection httpConnection,String body) throws IOException {OutputStream outputStream = httpConnection.getOutputStream();outputStream.write(body.getBytes(StandardCharsets.UTF_8));outputStream.flush();if (httpConnection.getResponseCode() != 200) {throw new RuntimeException("Failed : HTTP outor code : " + httpConnection.getResponseCode());}BufferedReader responseBuffer = new BufferedReader(new InputStreamReader(httpConnection.getInputStream(), "UTF-8"));StringBuilder output = new StringBuilder();do {output.append(responseBuffer.readLine());} while (responseBuffer.read() != -1);httpConnection.disconnect();return output.toString();}}

四.王者段位接口访问设计 

1.开发详情

a.基于springboot的spring.factories开发自己的starter

b.采用openFeign实现http远程接口访问

c.用FeignRequestInterceptor完成请求头的权限认证参数放入

2.项目结构

3.系统侧使用

api:auth:appId: 12323appSecret: lakdsjlajdsljajskdjfdomain: https://sp.tcl.com/portal/

<dependency><groupId>com.tcl.ea.zenglx</groupId><artifactId>api-auth-spring-boot-starter</artifactId><version>1.0-SNAPSHOT</version>
</dependency>

@Service
public class RemoteDeal {@Autowiredprivate ApiClient apiClient;//获取用户信息public User getUserInfo() {return apiClient.getUserInfo();}}

 4.源码下载

api认证源码

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总结

 1.发起http请求的开源框架有， Forest，httpClient，feign，OKHttp等

 2.开发组件需要了解spring的生命周期，各种特性，springboot的各种特性