解决微服务feign调用添加token的问题

微服务feign调用添加token

1.一般情况是这么配置的

具体的怎么调用就不说了 如下配置，就可以在请求头中添加需要的请求头信息。

1. package localdate;
2. import feign.RequestInterceptor;
3. import feign.RequestTemplate;
4. import lombok.extern.slf4j.Slf4j;
5. import org.springframework.beans.factory.annotation.Autowired;
6. import org.springframework.context.annotation.Configuration;
7. import org.springframework.stereotype.Component;
8. import org.springframework.web.context.request.RequestAttributes;
9. import org.springframework.web.context.request.RequestContextHolder;
10. import org.springframework.web.context.request.ServletRequestAttributes;
11. import javax.servlet.http.HttpServletRequest;
12. import java.util.Collection;
13. import java.util.Enumeration;
14. import java.util.Iterator;
15. import java.util.Map;
16. /**
17. * feign调用服务时，会丢失请求头信息。需要在这里把认证信息收到添加上去
18. * @author TRON
19. * @since 2019-11-23
20. *
21. *
22. */
23. @Configuration
24. @Slf4j
25. public class FeignTokenInterceptor implements RequestInterceptor {
26. @Override
27. public void apply(RequestTemplate requestTemplate) {
28. log.info("======上下文中获取原请求信息======");
29. String token = "without token";
30. HttpServletRequest request = ((ServletRequestAttributes)
31. RequestContextHolder.getRequestAttributes()).getRequest();
32. Enumeration<String> headerNames = request.getHeaderNames();
33. while (headerNames.hasMoreElements()) {
34. String headerName = headerNames.nextElement();
35. String HeadValue = request.getHeader(headerName);
36. log.info("===原请求头信息=== headName: {}, headValue: {}", headerName, HeadValue);
37. if (headerName.equals("X-Authorization-access_token")||headerName.equals("x-authorization-access_token")) {
38. token = HeadValue;
39. }
40. }
41. log.info("=======Feign添加头部信息start======");
42. // requestTemplate.header("X-Authorization-access_token", token);
43. requestTemplate.header("X-Authorization-access_token", "tron123456");
44. log.info("=======Feign添加头部信息end======");
45. }
46. }

2 .但是，当熔断开启后，原先的这么配置就不起作用了

1. package localdate;
2. import com.netflix.hystrix.HystrixThreadPoolKey;
3. import com.netflix.hystrix.strategy.HystrixPlugins;
4. import com.netflix.hystrix.strategy.concurrency.HystrixConcurrencyStrategy;
5. import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariable;
6. import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariableLifecycle;
7. import com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier;
8. import com.netflix.hystrix.strategy.executionhook.HystrixCommandExecutionHook;
9. import com.netflix.hystrix.strategy.metrics.HystrixMetricsPublisher;
10. import com.netflix.hystrix.strategy.properties.HystrixPropertiesStrategy;
11. import com.netflix.hystrix.strategy.properties.HystrixProperty;
12. import org.slf4j.Logger;
13. import org.slf4j.LoggerFactory;
14. import org.springframework.context.annotation.Configuration;
15. import org.springframework.web.context.request.RequestAttributes;
16. import org.springframework.web.context.request.RequestContextHolder;
17. import java.util.concurrent.BlockingQueue;
18. import java.util.concurrent.Callable;
19. import java.util.concurrent.ThreadPoolExecutor;
20. import java.util.concurrent.TimeUnit;
21. /**
22. * 自定义并发策略
23. * 将现有的并发策略作为新并发策略的成员变量
24. * 在新并发策略中，返回现有并发策略的线程池、Queue
25. *
26. * hystrix.command.default.execution.isolation.strategy=THREAD
27. * Hystrix的默认隔离策略（官方推荐，当使用该隔离策略时，是没办法拿到 ThreadLocal 中的值的，但是RequestContextHolder 源码中，使用了两个ThreadLocal）
28. * hystrix.command.default.execution.isolation.strategy=SEMAPHORE （将隔离策略改为SEMAPHORE 也可以解决这个问题，但是官方并不推荐这个策略，因为这个策略对网络资源消耗比较大）
29. *
30. * 主要是解决当 Hystrix的默认隔离策略是THREAD时，不能通过RequestContextHolder获取到request对象的问题
31. *
32. */
33. //@Configuration
34. public class FeignConfig extends HystrixConcurrencyStrategy {
35. private static final Logger log = LoggerFactory.getLogger(FeignConfig.class);
36. private HystrixConcurrencyStrategy delegate;
37. public FeignConfig() {
38. try {
39. this.delegate = HystrixPlugins.getInstance().getConcurrencyStrategy();
40. if (this.delegate instanceof FeignConfig) {
41. // Welcome to singleton hell...
42. return;
43. }
44. HystrixCommandExecutionHook commandExecutionHook =
45. HystrixPlugins.getInstance().getCommandExecutionHook();
46. HystrixEventNotifier eventNotifier = HystrixPlugins.getInstance().getEventNotifier();
47. HystrixMetricsPublisher metricsPublisher = HystrixPlugins.getInstance().getMetricsPublisher();
48. HystrixPropertiesStrategy propertiesStrategy =
49. HystrixPlugins.getInstance().getPropertiesStrategy();
50. this.logCurrentStateOfHystrixPlugins(eventNotifier, metricsPublisher, propertiesStrategy);
51. HystrixPlugins.reset();
52. HystrixPlugins.getInstance().registerConcurrencyStrategy(this);
53. HystrixPlugins.getInstance().registerCommandExecutionHook(commandExecutionHook);
54. HystrixPlugins.getInstance().registerEventNotifier(eventNotifier);
55. HystrixPlugins.getInstance().registerMetricsPublisher(metricsPublisher);
56. HystrixPlugins.getInstance().registerPropertiesStrategy(propertiesStrategy);
57. } catch (Exception e) {
58. log.error("Failed to register Sleuth Hystrix Concurrency Strategy", e);
59. }
60. }
61. private void logCurrentStateOfHystrixPlugins(HystrixEventNotifier eventNotifier,
62. HystrixMetricsPublisher metricsPublisher, HystrixPropertiesStrategy propertiesStrategy) {
63. if (log.isDebugEnabled()) {
64. log.debug("Current Hystrix plugins configuration is [" + "concurrencyStrategy ["
65. + this.delegate + "]," + "eventNotifier [" + eventNotifier + "]," + "metricPublisher ["
66. + metricsPublisher + "]," + "propertiesStrategy [" + propertiesStrategy + "]," + "]");
67. log.debug("Registering Sleuth Hystrix Concurrency Strategy.");
68. }
69. }
70. @Override
71. public <T> Callable<T> wrapCallable(Callable<T> callable) {
72. RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
73. return new WrappedCallable<>(callable, requestAttributes);
74. }
75. @Override
76. public ThreadPoolExecutor getThreadPool(HystrixThreadPoolKey threadPoolKey,
77. HystrixProperty<Integer> corePoolSize, HystrixProperty<Integer> maximumPoolSize,
78. HystrixProperty<Integer> keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue) {
79. return this.delegate.getThreadPool(threadPoolKey, corePoolSize, maximumPoolSize, keepAliveTime,
80. unit, workQueue);
81. }
82. @Override
83. public BlockingQueue<Runnable> getBlockingQueue(int maxQueueSize) {
84. return this.delegate.getBlockingQueue(maxQueueSize);
85. }
86. @Override
87. public <T> HystrixRequestVariable<T> getRequestVariable(HystrixRequestVariableLifecycle<T> rv) {
88. return this.delegate.getRequestVariable(rv);
89. }
90. static class WrappedCallable<T> implements Callable<T> {
91. private final Callable<T> target;
92. private final RequestAttributes requestAttributes;
93. public WrappedCallable(Callable<T> target, RequestAttributes requestAttributes) {
94. this.target = target;
95. this.requestAttributes = requestAttributes;
96. }
97. @Override
98. public T call() throws Exception {
99. try {
100. RequestContextHolder.setRequestAttributes(requestAttributes);
101. return target.call();
102. } finally {
103. RequestContextHolder.resetRequestAttributes();
104. }
105. }
106. }
107. }

3 .feign和熔断的配置

1. feign:
2. client:
3. config:
4. default:
5. connectTimeout: 5000 #连接超时3秒，连接失败时直接调用降级方法
6. readTimeout: 100000 #连接成功，处理数据的时间限制10秒 100000 读取时间过短会抛异常java.net.SocketTimeoutException: Read timed out
7. loggerLevel: full #日志输出等级
8. hystrix:
9. enabled: true
10. hystrix:
11. command:
12. default:
13. execution:
14. isolation:
15. thread:
16. timeoutInMilliseconds: 5000 #服务连接成功，但是时间过长，降级方法调用时间 60000 5000

feign微服务的相互调用

我只是记录服务提供方、消费方的代码编写，配置什么的大家在网上搜，一大堆。

首先是服务提供方：

启动类上加上注解@EnableFeignClients，然后正常的写controller、service等业务逻辑

其次是服务的调用方：

1.首先启动类上加上注解@EnableFeignClients

2.编写服务调用接口

3.编写接口熔断处理方法

4.本人遇到的问题是需要用到调用方的请求头里面的信息，但是在提供方取不到，这时可以通过在调用方增加配置来解决

1. import feign.RequestInterceptor;
2. import feign.RequestTemplate;
3. import java.util.Enumeration;
4. import javax.servlet.http.HttpServletRequest;
5. import org.springframework.web.context.request.RequestContextHolder;
6. import org.springframework.web.context.request.ServletRequestAttributes;
7.  
8. /**
9. * @author ydf
10. * @date 2021/5/13
11. * @description:
12. **/
13. public class FeignBasicAuthRequestInterceptor implements RequestInterceptor {
14.  
15. @Override
16. public void apply(RequestTemplate requestTemplate) {
17. ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
18. .getRequestAttributes();
19. HttpServletRequest request = attributes.getRequest();
20. Enumeration<String> headerNames = request.getHeaderNames();
21. if (headerNames != null) {
22. while (headerNames.hasMoreElements()) {
23. String name = headerNames.nextElement();
24. String values = request.getHeader(name);
25. requestTemplate.header(name, values);
26. }
27. }
28. }
29. }

1. import com.jingling.netsign.applet.interceptor.FeignBasicAuthRequestInterceptor;
2. import feign.RequestInterceptor;
3. import org.springframework.context.annotation.Bean;
4. import org.springframework.context.annotation.Configuration;
5. /**
6. * @author ydf
7. * @date 2021/5/13
8. * @description:
9. **/
10. @Configuration
11. public class FeignSupportConfig {
12. /**
13. * feign请求拦截器
14. *
15. * @return
16. */
17. @Bean
18. public RequestInterceptor requestInterceptor(){
19. return new FeignBasicAuthRequestInterceptor();
20. }
21. }

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。

原文链接：https://blog.csdn.net/hzy3344520/article/details/105846487