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

---

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DigestUtils


   publicvoid 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: 12323
    appSecret: lakdsjlajdsljajskdjf
    domain: 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 {

    @Autowired
    private ApiClient apiClient;

    //获取用户信息
    
    public User getUserInfo() {
        
        return apiClient.getUserInfo();

    }

}

 4.源码下载

api认证源码

---

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