使用Feign調用時添加驗證信息token到請求頭方式
Feign調用添加驗證信息token到請求頭
1、這是最簡單的一個方法
但是需要對每個調用都一一添加，就是使用@RequestHeader註解添加參數到請求頭中去
@FeignClient(name = "capability-register", fallback = ApiServiceClientFallBack.class )
public interface ApiServiceClient {
@GetMapping("/apiDebug/")
Result debug(@RequestParam("url") String path,
@RequestParam("param") String param,
@RequestParam("method") String method,
@RequestParam("appKey") String appKey,
@RequestHeader(name = "Token",required = true) String Token);
}
這裡需要註意，其他幾個參數都是調用debug接口需要的參數，使用此接口時，直接獲取驗證信息放進token中，就可以瞭
2、這個方法是網上大多數人的用法
但是我看到一個大神的博客，說是這種方法有點不好，然後大神自定義瞭一個Hystrix的策略，這個第三種方法再講
這種方法是對所有的feign調用統一設置請求頭
package com.hiynn.provider.configuration;
import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
/**
* @author lidai
* @date 2019/2/27 16:14
* <p>
* Feign調用的時候添加請求頭Token
*/
@Configuration
public class FeignConfiguration implements RequestInterceptor {
@Override
public void apply(RequestTemplate requestTemplate) {
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
requestTemplate.header("Token", request.getHeader("Token"));
}
}
有瞭configuration之後還需要再feign添加configuration屬性
@FeignClient(name = "capability-register", fallback = ApiServiceClientFallBack.class ,configuration = FeignConfiguration.class)
public interface ApiServiceClient {
@GetMapping("/apiDebug/")
Result debug(@RequestParam("url") String path,
@RequestParam("param") String param,
@RequestParam("method") String method,
@RequestParam("appKey") String appKey);
}
到這裡的時候，如果你debug的話，會發現FeignConfiguration中的attributes獲取不到，需要再配置文件中添加如下配置就可以瞭
hystrix: command: default: execution: isolation: strategy: SEMAPHORE
3、第三種方法就是大神的方法瞭
和第二種方法的區別就是不需要添加配置文件，但是FeignConfiguration這個還是要的，不需要加配置文件就加一個自定義策略
package com.hiynn.provider.configuration;
import com.netflix.hystrix.HystrixThreadPoolKey;
import com.netflix.hystrix.HystrixThreadPoolProperties;
import com.netflix.hystrix.strategy.HystrixPlugins;
import com.netflix.hystrix.strategy.concurrency.HystrixConcurrencyStrategy;
import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariable;
import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariableLifecycle;
import com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier;
import com.netflix.hystrix.strategy.executionhook.HystrixCommandExecutionHook;
import com.netflix.hystrix.strategy.metrics.HystrixMetricsPublisher;
import com.netflix.hystrix.strategy.properties.HystrixPropertiesStrategy;
import com.netflix.hystrix.strategy.properties.HystrixProperty;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* @author lidai
* @date 2019/3/18 10:09
*/
@Slf4j
@Configuration
public class FeignHystrixConcurrencyStrategy extends HystrixConcurrencyStrategy {
private HystrixConcurrencyStrategy delegate;
public FeignHystrixConcurrencyStrategy() {
try {
this.delegate = HystrixPlugins.getInstance().getConcurrencyStrategy();
if (this.delegate instanceof FeignHystrixConcurrencyStrategy) {
// Welcome to singleton hell...
return;
}
HystrixCommandExecutionHook commandExecutionHook =
HystrixPlugins.getInstance().getCommandExecutionHook();
HystrixEventNotifier eventNotifier = HystrixPlugins.getInstance().getEventNotifier();
HystrixMetricsPublisher metricsPublisher = HystrixPlugins.getInstance().getMetricsPublisher();
HystrixPropertiesStrategy propertiesStrategy =
HystrixPlugins.getInstance().getPropertiesStrategy();
this.logCurrentStateOfHystrixPlugins(eventNotifier, metricsPublisher, propertiesStrategy);
HystrixPlugins.reset();
HystrixPlugins.getInstance().registerConcurrencyStrategy(this);
HystrixPlugins.getInstance().registerCommandExecutionHook(commandExecutionHook);
HystrixPlugins.getInstance().registerEventNotifier(eventNotifier);
HystrixPlugins.getInstance().registerMetricsPublisher(metricsPublisher);
HystrixPlugins.getInstance().registerPropertiesStrategy(propertiesStrategy);
} catch (Exception e) {
log.error("Failed to register Sleuth Hystrix Concurrency Strategy", e);
}
}
private void logCurrentStateOfHystrixPlugins(HystrixEventNotifier eventNotifier,
HystrixMetricsPublisher metricsPublisher, HystrixPropertiesStrategy propertiesStrategy) {
if (log.isDebugEnabled()) {
log.debug("Current Hystrix plugins configuration is [" + "concurrencyStrategy ["
+ this.delegate + "]," + "eventNotifier [" + eventNotifier + "]," + "metricPublisher ["
+ metricsPublisher + "]," + "propertiesStrategy [" + propertiesStrategy + "]," + "]");
log.debug("Registering Sleuth Hystrix Concurrency Strategy.");
}
}
@Override
public <T> Callable<T> wrapCallable(Callable<T> callable) {
RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
return new WrappedCallable<>(callable, requestAttributes);
}
@Override
public ThreadPoolExecutor getThreadPool(HystrixThreadPoolKey threadPoolKey,
HystrixProperty<Integer> corePoolSize, HystrixProperty<Integer> maximumPoolSize,
HystrixProperty<Integer> keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue) {
return this.delegate.getThreadPool(threadPoolKey, corePoolSize, maximumPoolSize, keepAliveTime,
unit, workQueue);
}
@Override
public ThreadPoolExecutor getThreadPool(HystrixThreadPoolKey threadPoolKey,
HystrixThreadPoolProperties threadPoolProperties) {
return this.delegate.getThreadPool(threadPoolKey, threadPoolProperties);
}
@Override
public BlockingQueue<Runnable> getBlockingQueue(int maxQueueSize) {
return this.delegate.getBlockingQueue(maxQueueSize);
}
@Override
public <T> HystrixRequestVariable<T> getRequestVariable(HystrixRequestVariableLifecycle<T> rv) {
return this.delegate.getRequestVariable(rv);
}
static class WrappedCallable<T> implements Callable<T> {
private final Callable<T> target;
private final RequestAttributes requestAttributes;
public WrappedCallable(Callable<T> target, RequestAttributes requestAttributes) {
this.target = target;
this.requestAttributes = requestAttributes;
}
@Override
public T call() throws Exception {
try {
RequestContextHolder.setRequestAttributes(requestAttributes);
return target.call();
} finally {
RequestContextHolder.resetRequestAttributes();
}
}
}
}
加上這個就可以瞭，親測三種方法均可行。
Feign中增加請求頭
最近遇到項目在調用
實現RequestInterceptor 接口，然後可以根據feignClient中的值加到請求頭中，使用時候在feignClient中配置，這樣就可以把參數傳入feign中
import com.alibaba.fastjson.JSONObject;
import com.google.common.collect.Lists;
import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.apache.commons.collections4.CollectionUtils;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
public class FeignConfiguration implements RequestInterceptor {
@Override
public void apply(RequestTemplate template) {
List<String> list = new ArrayList<>();
if ("get".equalsIgnoreCase(template.method())){
Map<String, Collection<String>> queries = template.queries();
list = (List<String>) queries.get("key");
} else if ("post".equalsIgnoreCase(template.method())){
byte[] body = template.body();
Map<String, Object> map = JSONObject.parseObject(body, Map.class);
Object key = map.get("key");
if (key != null){
list.add(key.toString());
}
}
if (CollectionUtils.isNotEmpty(list)) {
template.header("head", list);
}
}
}
import com.hbasesoft.vcc.sgp.integral.goods.config.FeignConfiguration;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
@FeignClient(name = "test", path = "/test", configuration = FeignConfiguration.class)
public interface ErpGoodsCouponsExternalClient {
@GetMapping("/url")
Object getData(@RequestParam("key") String key);
}
以上為個人經驗，希望能給大傢一個參考，也希望大傢多多支持WalkonNet。
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