{"id":891,"date":"2023-03-11T06:50:21","date_gmt":"2023-03-10T22:50:21","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=891"},"modified":"2023-04-29T16:37:01","modified_gmt":"2023-04-29T08:37:01","slug":"spring-cloud-service-gateway-zuul-advanced-chapter","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/11\/spring-cloud-service-gateway-zuul-advanced-chapter\/","title":{"rendered":"Spring Cloud\u670d\u52a1\u7f51\u5173Zuul\u9ad8\u7ea7\u7bc7"},"content":{"rendered":"<p>Zuul\u9664\u4e86\u7f51\u5173\u4f7f\u7528\u6a21\u5f0f\uff0c\u4ee5\u53ca\u81ea\u52a8\u8f6c\u53d1\u673a\u5236\uff0c\u4f46\u5176\u5b9eZuul\u8fd8\u6709\u66f4\u591a\u7684\u5e94\u7528\u573a\u666f\uff0c\u6bd4\u5982\uff1a\u9274\u6743\u3001\u6d41\u91cf\u8f6c\u53d1\u3001\u8bf7\u6c42\u7edf\u8ba1\u7b49\u7b49<\/p>\n<h2>Zuul\u7684\u6838\u5fc3<\/h2>\n<p><!-- more --><\/p>\n<h3>\u8fc7\u6ee4\u5668Filter<\/h3>\n<p>Filter\u662fZuul\u7684\u6838\u5fc3\uff0c\u7528\u6765\u5b9e\u73b0\u5bf9\u5916\u670d\u52a1\u7684\u63a7\u5236\u3002Filter\u7684\u751f\u547d\u5468\u671f\u67094\u4e2a\uff0c\u5206\u522b\u662f\u201cPRE\u201d\u3001\u201cROUTING\u201d\u3001\u201cPOST\u201d\u3001\u201cERROR\u201d\uff0c\u6574\u4e2a\u751f\u547d\u5468\u671f\u53ef\u4ee5\u7528\u4e0b\u56fe\u6765\u8868\u793a\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.yezhou.me\/AppBlog\/images\/Java\/zuul-core.png\" alt=\"zuul core\" \/><\/p>\n<p>Zuul\u5927\u90e8\u5206\u529f\u80fd\u90fd\u662f\u901a\u8fc7\u8fc7\u6ee4\u5668\u6765\u5b9e\u73b0\u7684\uff0c\u8fd9\u4e9b\u8fc7\u6ee4\u5668\u7c7b\u578b\u5bf9\u5e94\u4e8e\u8bf7\u6c42\u7684\u5178\u578b\u751f\u547d\u5468\u671f\u3002<\/p>\n<ul>\n<li><strong>PRE<\/strong>\uff1a\u8fd9\u79cd\u8fc7\u6ee4\u5668\u5728\u8bf7\u6c42\u88ab\u8def\u7531\u4e4b\u524d\u8c03\u7528\u3002\u6211\u4eec\u53ef\u5229\u7528\u8fd9\u79cd\u8fc7\u6ee4\u5668\u5b9e\u73b0\u8eab\u4efd\u9a8c\u8bc1\u3001\u5728\u96c6\u7fa4\u4e2d\u9009\u62e9\u8bf7\u6c42\u7684\u5fae\u670d\u52a1\u3001\u8bb0\u5f55\u8c03\u8bd5\u4fe1\u606f\u7b49\u3002<\/li>\n<li><strong>ROUTING<\/strong>\uff1a\u8fd9\u79cd\u8fc7\u6ee4\u5668\u5c06\u8bf7\u6c42\u8def\u7531\u5230\u5fae\u670d\u52a1\u3002\u8fd9\u79cd\u8fc7\u6ee4\u5668\u7528\u4e8e\u6784\u5efa\u53d1\u9001\u7ed9\u5fae\u670d\u52a1\u7684\u8bf7\u6c42\uff0c\u5e76\u4f7f\u7528Apache HttpClient\u6216Netfilx Ribbon\u8bf7\u6c42\u5fae\u670d\u52a1\u3002<\/li>\n<li><strong>POST<\/strong>\uff1a\u8fd9\u79cd\u8fc7\u6ee4\u5668\u5728\u8def\u7531\u5230\u5fae\u670d\u52a1\u4ee5\u540e\u6267\u884c\u3002\u8fd9\u79cd\u8fc7\u6ee4\u5668\u53ef\u7528\u6765\u4e3a\u54cd\u5e94\u6dfb\u52a0\u6807\u51c6\u7684HTTP Header\u3001\u6536\u96c6\u7edf\u8ba1\u4fe1\u606f\u548c\u6307\u6807\u3001\u5c06\u54cd\u5e94\u4ece\u5fae\u670d\u52a1\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u7b49\u3002<\/li>\n<li><strong>ERROR<\/strong>\uff1a\u5728\u5176\u4ed6\u9636\u6bb5\u53d1\u751f\u9519\u8bef\u65f6\u6267\u884c\u8be5\u8fc7\u6ee4\u5668\u3002\u9664\u4e86\u9ed8\u8ba4\u7684\u8fc7\u6ee4\u5668\u7c7b\u578b\uff0cZuul\u8fd8\u5141\u8bb8\u6211\u4eec\u521b\u5efa\u81ea\u5b9a\u4e49\u7684\u8fc7\u6ee4\u5668\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u5236\u4e00\u79cdSTATIC\u7c7b\u578b\u7684\u8fc7\u6ee4\u5668\uff0c\u76f4\u63a5\u5728Zuul\u4e2d\u751f\u6210\u54cd\u5e94\uff0c\u800c\u4e0d\u5c06\u8bf7\u6c42\u8f6c\u53d1\u5230\u540e\u7aef\u7684\u5fae\u670d\u52a1\u3002<\/li>\n<\/ul>\n<h3>Zuul\u4e2d\u9ed8\u8ba4\u5b9e\u73b0\u7684Filter<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u7c7b\u578b<\/th>\n<th style=\"text-align: left;\">\u987a\u5e8f<\/th>\n<th style=\"text-align: left;\">\u8fc7\u6ee4\u5668<\/th>\n<th style=\"text-align: left;\">\u529f\u80fd<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\">pre<\/td>\n<td style=\"text-align: left;\">-3<\/td>\n<td style=\"text-align: left;\">ServletDetectionFilter<\/td>\n<td style=\"text-align: left;\">\u6807\u8bb0\u5904\u7406Servlet\u7684\u7c7b\u578b<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">pre<\/td>\n<td style=\"text-align: left;\">-2<\/td>\n<td style=\"text-align: left;\">Servlet30WrapperFilter<\/td>\n<td style=\"text-align: left;\">\u5305\u88c5HttpServletRequest\u8bf7\u6c42<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">pre<\/td>\n<td style=\"text-align: left;\">-1<\/td>\n<td style=\"text-align: left;\">FormBodyWrapperFilter<\/td>\n<td style=\"text-align: left;\">\u5305\u88c5\u8bf7\u6c42\u4f53<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">route<\/td>\n<td style=\"text-align: left;\">1<\/td>\n<td style=\"text-align: left;\">DebugFilter<\/td>\n<td style=\"text-align: left;\">\u6807\u8bb0\u8c03\u8bd5\u6807\u5fd7<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">route<\/td>\n<td style=\"text-align: left;\">5<\/td>\n<td style=\"text-align: left;\">PreDecorationFilter<\/td>\n<td style=\"text-align: left;\">\u5904\u7406\u8bf7\u6c42\u4e0a\u4e0b\u6587\u4f9b\u540e\u7eed\u4f7f\u7528<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">route<\/td>\n<td style=\"text-align: left;\">10<\/td>\n<td style=\"text-align: left;\">RibbonRoutingFilter<\/td>\n<td style=\"text-align: left;\">serviceId\u8bf7\u6c42\u8f6c\u53d1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">route<\/td>\n<td style=\"text-align: left;\">100<\/td>\n<td style=\"text-align: left;\">SimpleHostRoutingFilter<\/td>\n<td style=\"text-align: left;\">url\u8bf7\u6c42\u8f6c\u53d1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">route<\/td>\n<td style=\"text-align: left;\">500<\/td>\n<td style=\"text-align: left;\">SendForwardFilter<\/td>\n<td style=\"text-align: left;\">forward\u8bf7\u6c42\u8f6c\u53d1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">post<\/td>\n<td style=\"text-align: left;\">0<\/td>\n<td style=\"text-align: left;\">SendErrorFilter<\/td>\n<td style=\"text-align: left;\">\u5904\u7406\u6709\u9519\u8bef\u7684\u8bf7\u6c42\u54cd\u5e94<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">post<\/td>\n<td style=\"text-align: left;\">1000<\/td>\n<td style=\"text-align: left;\">SendResponseFilter<\/td>\n<td style=\"text-align: left;\">\u5904\u7406\u6b63\u5e38\u7684\u8bf7\u6c42\u54cd\u5e94<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u7981\u7528\u6307\u5b9a\u7684Filter<\/h3>\n<p>\u53ef\u4ee5\u5728<code>application.yml<\/code>\u4e2d\u914d\u7f6e\u9700\u8981\u7981\u7528\u7684filter\uff0c\u683c\u5f0f\uff1a<\/p>\n<pre><code class=\"language-yml\">zuul:\n  FormBodyWrapperFilter:\n    pre:\n      disable: true<\/code><\/pre>\n<h2>\u81ea\u5b9a\u4e49Filter<\/h2>\n<h3>\u81ea\u5b9a\u4e49Filter\u5b9e\u73b0<\/h3>\n<p>\u5b9e\u73b0\u81ea\u5b9a\u4e49Filter\uff0c\u9700\u8981\u7ee7\u627fZuulFilter\u7684\u7c7b\uff0c\u5e76\u8986\u76d6\u5176\u4e2d\u76844\u4e2a\u65b9\u6cd5\u3002<\/p>\n<pre><code class=\"language-java\">public class MyFilter extends ZuulFilter {\n    @Override\n    String filterType() {\n        return &quot;pre&quot;; \/\/\u5b9a\u4e49filter\u7684\u7c7b\u578b\uff0c\u6709pre\u3001route\u3001post\u3001error\u56db\u79cd\n    }\n\n    @Override\n    int filterOrder() {\n        return 10; \/\/\u5b9a\u4e49filter\u7684\u987a\u5e8f\uff0c\u6570\u5b57\u8d8a\u5c0f\u8868\u793a\u987a\u5e8f\u8d8a\u9ad8\uff0c\u8d8a\u5148\u6267\u884c\n    }\n\n    @Override\n    boolean shouldFilter() {\n        return true; \/\/\u8868\u793a\u662f\u5426\u9700\u8981\u6267\u884c\u8be5filter\uff0ctrue\u8868\u793a\u6267\u884c\uff0cfalse\u8868\u793a\u4e0d\u6267\u884c\n    }\n\n    @Override\n    Object run() {\n        return null; \/\/filter\u9700\u8981\u6267\u884c\u7684\u5177\u4f53\u64cd\u4f5c\n    }\n}<\/code><\/pre>\n<h3>\u81ea\u5b9a\u4e49Filter\u793a\u4f8b<\/h3>\n<h4>\u81ea\u5b9a\u4e49TokenFilter<\/h4>\n<p>\u6211\u4eec\u5047\u8bbe\u6709\u8fd9\u6837\u4e00\u4e2a\u573a\u666f\uff0c\u56e0\u4e3a\u670d\u52a1\u7f51\u5173\u5e94\u5bf9\u7684\u662f\u5916\u90e8\u7684\u6240\u6709\u8bf7\u6c42\uff0c\u4e3a\u4e86\u907f\u514d\u4ea7\u751f\u5b89\u5168\u9690\u60a3\uff0c\u6211\u4eec\u9700\u8981\u5bf9\u8bf7\u6c42\u505a\u4e00\u5b9a\u7684\u9650\u5236\uff0c\u6bd4\u5982\u8bf7\u6c42\u4e2d\u542b\u6709Token\u4fbf\u8ba9\u8bf7\u6c42\u7ee7\u7eed\u5f80\u4e0b\u8d70\uff0c\u5982\u679c\u8bf7\u6c42\u4e0d\u5e26Token\u5c31\u76f4\u63a5\u8fd4\u56de\u5e76\u7ed9\u51fa\u63d0\u793a\u3002<\/p>\n<p>\u9996\u5148\u81ea\u5b9a\u4e49\u4e00\u4e2aFilter\uff0c\u5728run()\u65b9\u6cd5\u4e2d\u9a8c\u8bc1\u53c2\u6570\u662f\u5426\u542b\u6709Token\u3002<\/p>\n<pre><code class=\"language-java\">@Slf4j\npublic class TokenFilter extends ZuulFilter {\n    @Override\n    public String filterType() {\n        return &quot;pre&quot;; \/\/ \u53ef\u4ee5\u5728\u8bf7\u6c42\u88ab\u8def\u7531\u4e4b\u524d\u8c03\u7528\n    }\n\n    @Override\n    public int filterOrder() {\n        return 0; \/\/ filter\u6267\u884c\u987a\u5e8f\uff0c\u901a\u8fc7\u6570\u5b57\u6307\u5b9a ,\u4f18\u5148\u7ea7\u4e3a0\uff0c\u6570\u5b57\u8d8a\u5927\uff0c\u4f18\u5148\u7ea7\u8d8a\u4f4e\n    }\n\n    @Override\n    public boolean shouldFilter() {\n        return true; \/\/ \u662f\u5426\u6267\u884c\u8be5\u8fc7\u6ee4\u5668\uff0c\u6b64\u5904\u4e3atrue\uff0c\u8bf4\u660e\u9700\u8981\u8fc7\u6ee4\n    }\n\n    @Override\n    public Object run() throws ZuulException {\n        RequestContext ctx = RequestContext.getCurrentContext();\n        HttpServletRequest request = ctx.getRequest();\n\n        log.info(&quot;TokenFilter {},{}&quot;, request.getMethod(), request.getRequestURL().toString());\n\n        String token = request.getParameter(&quot;token&quot;);\/\/ \u83b7\u53d6\u8bf7\u6c42\u7684\u53c2\u6570\n\n        if (StringUtils.isNotBlank(token)) {\n            ctx.setSendZuulResponse(true); \/\/\u5bf9\u8bf7\u6c42\u8fdb\u884c\u8def\u7531\n            ctx.setResponseStatusCode(200);\n            ctx.set(&quot;isSuccess&quot;, true);\n            return null;\n        } else {\n            ctx.setSendZuulResponse(false); \/\/\u4e0d\u5bf9\u5176\u8fdb\u884c\u8def\u7531\n            ctx.setResponseStatusCode(400);\n            ctx.setResponseBody(&quot;Token is empty&quot;);\n            ctx.set(&quot;isSuccess&quot;, false);\n            return null;\n        }\n    }\n}<\/code><\/pre>\n<p>\u5c06TokenFilter\u52a0\u5165\u5230\u8bf7\u6c42\u62e6\u622a\u961f\u5217<\/p>\n<pre><code class=\"language-java\">@Configuration\npublic class FilterConfig {\n\n    @Bean\n    public TokenFilter tokenFilter() {\n        return new TokenFilter();\n    }\n\n}<\/code><\/pre>\n<p>\u914d\u7f6e\u6587\u4ef6<\/p>\n<pre><code>spring.application.name=gateway-service-zuul\nserver.port=8888\n\neureka.client.serviceUrl.defaultZone=http:\/\/localhost:8000\/eureka\/<\/code><\/pre>\n<p>\u542f\u52a8Zuul\u4ee3\u7406<\/p>\n<pre><code class=\"language-java\">@SpringBootApplication\n@EnableZuulProxy\npublic class SpringCloudZuulApplication {\n\n    public static void main(String[] args) {\n        SpringApplication.run(SpringCloudZuulApplication.class, args);\n    }\n\n}<\/code><\/pre>\n<h4>\u6d4b\u8bd5<\/h4>\n<p>\u6211\u4eec\u4f9d\u6b21\u542f\u52a8\u793a\u4f8b\u9879\u76ee\uff1aspring-cloud-eureka\u3001spring-cloud-producer\u3001spring-cloud-zuul<\/p>\n<p>\u8bbf\u95ee\u5730\u5740\uff1a<code>http:\/\/localhost:8888\/spring-cloud-producer\/hello?name=Joe.Ye<\/code>\uff0c\u8fd4\u56de\uff1a<code>Token is empty<\/code>\uff0c\u8bf7\u6c42\u88ab\u62e6\u622a\u8fd4\u56de\u3002<br \/>\n\u8bbf\u95ee\u5730\u5740\uff1a<code>http:\/\/localhost:8888\/spring-cloud-producer\/hello?name=Joe.Ye&amp;token=xx<\/code>\uff0c\u8fd4\u56de\uff1a<code>Hello Joe.Ye, This is first message<\/code>\uff0c\u8bf4\u660e\u8bf7\u6c42\u6b63\u5e38\u54cd\u5e94\u3002<\/p>\n<p>\u901a\u8fc7\u4e0a\u9762\u8fd9\u4f8b\u5b50\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u201cPRE\u201d\u7c7b\u578b\u7684Filter\u505a\u5f88\u591a\u7684\u9a8c\u8bc1\u5de5\u4f5c\uff0c\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u6211\u4eec\u53ef\u4ee5\u7ed3\u5408shiro\u3001oauth2.0\u7b49\u6280\u672f\u53bb\u505a\u9274\u6743\u3001\u9a8c\u8bc1\u3002<\/p>\n<h2>\u8def\u7531\u7194\u65ad<\/h2>\n<p>\u5f53\u6211\u4eec\u7684\u540e\u7aef\u670d\u52a1\u51fa\u73b0\u5f02\u5e38\u7684\u65f6\u5019\uff0c\u6211\u4eec\u4e0d\u5e0c\u671b\u5c06\u5f02\u5e38\u629b\u51fa\u7ed9\u6700\u5916\u5c42\uff0c\u671f\u671b\u670d\u52a1\u53ef\u4ee5\u81ea\u52a8\u8fdb\u884c\u4e00\u964d\u7ea7\u3002Zuul\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u8fd9\u6837\u7684\u652f\u6301\u3002\u5f53\u67d0\u4e2a\u670d\u52a1\u51fa\u73b0\u5f02\u5e38\u65f6\uff0c\u76f4\u63a5\u8fd4\u56de\u6211\u4eec\u9884\u8bbe\u7684\u4fe1\u606f\u3002<\/p>\n<p>\u6211\u4eec\u901a\u8fc7\u81ea\u5b9a\u4e49\u7684fallback\u65b9\u6cd5\uff0c\u5e76\u4e14\u5c06\u5176\u6307\u5b9a\u7ed9\u67d0\u4e2aroute\u6765\u5b9e\u73b0\u8be5route\u8bbf\u95ee\u51fa\u95ee\u9898\u7684\u7194\u65ad\u5904\u7406\u3002\u4e3b\u8981\u7ee7\u627f<code>ZuulFallbackProvider<\/code>\u63a5\u53e3\u6765\u5b9e\u73b0\uff0c<code>ZuulFallbackProvider<\/code>\u9ed8\u8ba4\u6709\u4e24\u4e2a\u65b9\u6cd5\uff0c\u4e00\u4e2a\u7528\u6765\u6307\u660e\u7194\u65ad\u62e6\u622a\u54ea\u4e2a\u670d\u52a1\uff0c\u4e00\u4e2a\u5b9a\u5236\u8fd4\u56de\u5185\u5bb9\u3002<\/p>\n<pre><code class=\"language-java\">public interface ZuulFallbackProvider {\n   \/**\n     * The route this fallback will be used for.\n     * @return The route the fallback will be used for.\n     *\/\n    public String getRoute();\n\n    \/**\n     * Provides a fallback response.\n     * @return The fallback response.\n     *\/\n    public ClientHttpResponse fallbackResponse();\n}<\/code><\/pre>\n<p>\u5b9e\u73b0\u7c7b\u901a\u8fc7\u5b9e\u73b0<code>getRoute<\/code>\u65b9\u6cd5\uff0c\u544a\u8bc9Zuul\u5b83\u662f\u8d1f\u8d23\u54ea\u4e2aroute\u5b9a\u4e49\u7684\u7194\u65ad\u3002\u800c<code>fallbackResponse<\/code>\u65b9\u6cd5\u5219\u662f\u544a\u8bc9 Zuul \u65ad\u8def\u51fa\u73b0\u65f6\uff0c\u5b83\u4f1a\u63d0\u4f9b\u4e00\u4e2a\u4ec0\u4e48\u8fd4\u56de\u503c\u6765\u5904\u7406\u8bf7\u6c42\u3002<\/p>\n<p>\u540e\u6765Spring\u53c8\u6269\u5c55\u4e86\u6b64\u7c7b\uff0c\u4e30\u5bcc\u4e86\u8fd4\u56de\u65b9\u5f0f\uff0c\u5728\u8fd4\u56de\u7684\u5185\u5bb9\u4e2d\u6dfb\u52a0\u4e86\u5f02\u5e38\u4fe1\u606f\uff0c\u56e0\u6b64\u6700\u65b0\u7248\u672c\u5efa\u8bae\u76f4\u63a5\u7ee7\u627f\u7c7b<code>FallbackProvider<\/code>\u3002<\/p>\n<p>\u6211\u4eec\u4ee5\u4e0a\u9762\u7684<code>spring-cloud-producer<\/code>\u670d\u52a1\u4e3a\u4f8b\uff0c\u5b9a\u5236\u5b83\u7684\u7194\u65ad\u8fd4\u56de\u5185\u5bb9\u3002<\/p>\n<pre><code class=\"language-java\">@Slf4j\n@Component\npublic class ProducerFallback implements FallbackProvider {\n\n    \/\/\u6307\u5b9a\u8981\u5904\u7406\u7684 service\n    @Override\n    public String getRoute() {\n        return &quot;spring-cloud-producer&quot;;\n    }\n\n    @Override\n    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {\n        if (cause != null &amp;&amp; cause.getCause() != null) {\n            String reason = cause.getCause().getMessage();\n            log.info(&quot;Excption {}&quot;, reason);\n        }\n        return fallbackResponse();\n    }\n\n    public ClientHttpResponse fallbackResponse() {\n        return new ClientHttpResponse() {\n            @Override\n            public HttpStatus getStatusCode() throws IOException {\n                return HttpStatus.OK;\n            }\n\n            @Override\n            public int getRawStatusCode() throws IOException {\n                return 200;\n            }\n\n            @Override\n            public String getStatusText() throws IOException {\n                return &quot;OK&quot;;\n            }\n\n            @Override\n            public void close() {\n\n            }\n\n            @Override\n            public InputStream getBody() throws IOException {\n                return new ByteArrayInputStream(&quot;The service is unavailable.&quot;.getBytes());\n            }\n\n            @Override\n            public HttpHeaders getHeaders() {\n                HttpHeaders headers = new HttpHeaders();\n                headers.setContentType(MediaType.APPLICATION_JSON);\n                return headers;\n            }\n        };\n    }\n}<\/code><\/pre>\n<p>\u5f53\u670d\u52a1\u51fa\u73b0\u5f02\u5e38\u65f6\uff0c\u6253\u5370\u76f8\u5173\u5f02\u5e38\u4fe1\u606f\uff0c\u5e76\u8fd4\u56de\uff1a<code>The service is unavailable.<\/code><\/p>\n<p>\u542f\u52a8\u9879\u76ee<code>spring-cloud-producer-2<\/code>\uff0c\u6b64\u65f6\u670d\u52a1\u4e2d\u5fc3\u4f1a\u6709\u4e24\u4e2a<code>spring-cloud-producer<\/code>\u9879\u76ee\uff0c\u6211\u4eec\u91cd\u542fZuul\u9879\u76ee\u3002\u518d\u624b\u52a8\u5173\u95ed<code>spring-cloud-producer-2<\/code>\u9879\u76ee\uff0c\u591a\u6b21\u8bbf\u95ee\u5730\u5740\uff1a<code>http:\/\/localhost:8888\/spring-cloud-producer\/hello?name=Joe.Ye&amp;token=xx<\/code>\uff0c\u4f1a\u4ea4\u66ff\u8fd4\u56de\uff1a<\/p>\n<pre><code>hello neo\uff0cthis is first message\nThe service is unavailable.\n...<\/code><\/pre>\n<p>\u6839\u636e\u8fd4\u56de\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff1a<code>spring-cloud-producer-2<\/code>\u9879\u76ee\u5df2\u7ecf\u542f\u7528\u4e86\u7194\u65ad\uff0c\u8fd4\u56de\uff1a<code>The service is unavailable.<\/code><\/p>\n<blockquote>\n<p>Zuul \u76ee\u524d\u53ea\u652f\u6301\u670d\u52a1\u7ea7\u522b\u7684\u7194\u65ad\uff0c\u4e0d\u652f\u6301\u5177\u4f53\u5230\u67d0\u4e2aURL\u8fdb\u884c\u7194\u65ad\u3002<\/p>\n<\/blockquote>\n<h2>\u8def\u7531\u91cd\u8bd5<\/h2>\n<p>\u6709\u65f6\u5019\u56e0\u4e3a\u7f51\u7edc\u6216\u8005\u5176\u5b83\u539f\u56e0\uff0c\u670d\u52a1\u53ef\u80fd\u4f1a\u6682\u65f6\u7684\u4e0d\u53ef\u7528\uff0c\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u5e0c\u671b\u53ef\u4ee5\u518d\u6b21\u5bf9\u670d\u52a1\u8fdb\u884c\u91cd\u8bd5\uff0cZuul\u4e5f\u5e2e\u6211\u4eec\u5b9e\u73b0\u4e86\u6b64\u529f\u80fd\uff0c\u9700\u8981\u7ed3\u5408<code>Spring Retry<\/code>\u4e00\u8d77\u6765\u5b9e\u73b0\u3002\u4e0b\u9762\u6211\u4eec\u4ee5\u4e0a\u9762\u7684\u9879\u76ee\u4e3a\u4f8b\u505a\u6f14\u793a\u3002<\/p>\n<h3>\u6dfb\u52a0Spring Retry\u4f9d\u8d56<\/h3>\n<p>\u9996\u5148\u5728<code>spring-cloud-zuul<\/code>\u9879\u76ee\u4e2d\u6dfb\u52a0Spring Retry\u4f9d\u8d56\u3002<\/p>\n<pre><code class=\"language-xml\">&lt;dependency&gt;\n    &lt;groupId&gt;org.springframework.retry&lt;\/groupId&gt;\n    &lt;artifactId&gt;spring-retry&lt;\/artifactId&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n<h3>\u5f00\u542fZuul Retry<\/h3>\n<p>\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u914d\u7f6e\u542f\u7528<code>Zuul Retry<\/code><\/p>\n<pre><code>#\u662f\u5426\u5f00\u542f\u91cd\u8bd5\u529f\u80fd\nzuul.retryable=true\n#\u5bf9\u5f53\u524d\u670d\u52a1\u7684\u91cd\u8bd5\u6b21\u6570\nribbon.MaxAutoRetries=2\n#\u5207\u6362\u76f8\u540cServer\u7684\u6b21\u6570\nribbon.MaxAutoRetriesNextServer=0<\/code><\/pre>\n<p>\u8fd9\u6837\u6211\u4eec\u5c31\u5f00\u542f\u4e86Zuul\u7684\u91cd\u8bd5\u529f\u80fd\u3002<\/p>\n<h3>\u6d4b\u8bd5<\/h3>\n<p>\u6211\u4eec\u5bf9<code>spring-cloud-producer<\/code>\u8fdb\u884c\u6539\u9020\uff0c\u5728hello\u65b9\u6cd5\u4e2d\u6dfb\u52a0\u5ef6\u65f6\uff0c\u5e76\u4e14\u5728\u8bf7\u6c42\u7684\u4e00\u5f00\u59cb\u6253\u5370\u53c2\u6570\u3002<\/p>\n<pre><code class=\"language-java\">@RequestMapping(&quot;\/hello&quot;)\npublic String index(@RequestParam String name) {\n    logger.info(&quot;Request two name is &quot; + name);\n    try {\n        Thread.sleep(1000000);\n    } catch (Exception e) {\n        logger.error(&quot;Hello two error&quot;, e);\n    }\n    return &quot;Hello &quot; + name + &quot;, this is two message&quot;;\n}<\/code><\/pre>\n<p>\u91cd\u542f<code>spring-cloud-producer<\/code>\u548c<code>spring-cloud-zuul<\/code>\u9879\u76ee<\/p>\n<p>\u8bbf\u95ee\u5730\u5740\uff1a<code>http:\/\/localhost:8888\/spring-cloud-producer\/hello?name=Joe.Ye&amp;token=xx<\/code>\uff0c\u5f53\u9875\u9762\u8fd4\u56de\uff1a<code>The service is unavailable.<\/code>\u65f6\u67e5\u770b\u9879\u76ee<code>spring-cloud-producer<\/code>\u540e\u53f0\u65e5\u5fd7\u5982\u4e0b\uff1a<\/p>\n<pre><code>Request two name is Joe.Ye\nRequest two name is Joe.Ye\nRequest two name is Joe.Ye<\/code><\/pre>\n<p>\u8bf4\u660e\u8fdb\u884c\u4e86\u4e09\u6b21\u7684\u8bf7\u6c42\uff0c\u4e5f\u5c31\u662f\u8fdb\u884c\u4e86\u4e24\u6b21\u7684\u91cd\u8bd5\u3002\u8fd9\u6837\u4e5f\u5c31\u9a8c\u8bc1\u4e86\u6211\u4eec\u7684\u914d\u7f6e\u4fe1\u606f\uff0c\u5b8c\u6210\u4e86Zuul\u7684\u91cd\u8bd5\u529f\u80fd\u3002<\/p>\n<blockquote>\n<p>\u5f00\u542f\u91cd\u8bd5\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u662f\u6709\u95ee\u9898\u7684\uff0c\u6bd4\u5982\u5f53\u538b\u529b\u8fc7\u5927\uff0c\u4e00\u4e2a\u5b9e\u4f8b\u505c\u6b62\u54cd\u5e94\u65f6\uff0c\u8def\u7531\u5c06\u6d41\u91cf\u8f6c\u5230\u53e6\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5f88\u6709\u53ef\u80fd\u5bfc\u81f4\u6700\u7ec8\u6240\u6709\u7684\u5b9e\u4f8b\u5168\u88ab\u538b\u57ae\u3002\u8bf4\u5230\u5e95\uff0c\u65ad\u8def\u5668\u7684\u5176\u4e2d\u4e00\u4e2a\u4f5c\u7528\u5c31\u662f\u9632\u6b62\u6545\u969c\u6216\u8005\u538b\u529b\u6269\u6563\u3002\u7528\u4e86retry\uff0c\u65ad\u8def\u5668\u5c31\u53ea\u6709\u5728\u8be5\u670d\u52a1\u7684\u6240\u6709\u5b9e\u4f8b\u90fd\u65e0\u6cd5\u8fd0\u4f5c\u7684\u60c5\u51b5\u4e0b\u624d\u80fd\u8d77\u4f5c\u7528\u3002\u8fd9\u79cd\u65f6\u5019\uff0c\u65ad\u8def\u5668\u7684\u5f62\u5f0f\u66f4\u50cf\u662f\u63d0\u4f9b\u4e00\u79cd\u53cb\u597d\u7684\u9519\u8bef\u4fe1\u606f\uff0c\u6216\u8005\u5047\u88c5\u670d\u52a1\u6b63\u5e38\u8fd0\u884c\u7684\u5047\u8c61\u7ed9\u4f7f\u7528\u8005\u3002\u4e0d\u7528retry\uff0c\u4ec5\u4f7f\u7528\u8d1f\u8f7d\u5747\u8861\u548c\u7194\u65ad\uff0c\u5c31\u5fc5\u987b\u8003\u8651\u5230\u662f\u5426\u80fd\u591f\u63a5\u53d7\u5355\u4e2a\u670d\u52a1\u5b9e\u4f8b\u5173\u95ed\u548ceureka\u5237\u65b0\u670d\u52a1\u5217\u8868\u4e4b\u95f4\u5e26\u6765\u7684\u77ed\u65f6\u95f4\u7684\u7194\u65ad\u3002\u5982\u679c\u53ef\u4ee5\u63a5\u53d7\uff0c\u5c31\u65e0\u9700\u4f7f\u7528retry\u3002<\/p>\n<\/blockquote>\n<h2>Zuul\u9ad8\u53ef\u7528<\/h2>\n<p>\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u4e0d\u540c\u7684\u5ba2\u6237\u7aef\u4f7f\u7528\u4e0d\u540c\u7684\u8d1f\u8f7d\u5c06\u8bf7\u6c42\u5206\u53d1\u5230\u540e\u7aef\u7684Zuul\uff0cZuul\u5728\u901a\u8fc7Eureka\u8c03\u7528\u540e\u7aef\u670d\u52a1\uff0c\u6700\u540e\u5bf9\u5916\u8f93\u51fa\u3002\u56e0\u6b64\u4e3a\u4e86\u4fdd\u8bc1Zuul\u7684\u9ad8\u53ef\u7528\u6027\uff0c\u524d\u7aef\u53ef\u4ee5\u540c\u65f6\u542f\u52a8\u591a\u4e2aZuul\u5b9e\u4f8b\u8fdb\u884c\u8d1f\u8f7d\uff0c\u5728Zuul\u7684\u524d\u7aef\u4f7f\u7528Nginx\u6216\u8005F5\u8fdb\u884c\u8d1f\u8f7d\u8f6c\u53d1\u4ee5\u8fbe\u5230\u9ad8\u53ef\u7528\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Zuul\u9664\u4e86\u7f51\u5173\u4f7f\u7528\u6a21\u5f0f\uff0c\u4ee5\u53ca\u81ea\u52a8\u8f6c\u53d1\u673a\u5236\uff0c\u4f46\u5176\u5b9eZuul\u8fd8\u6709\u66f4\u591a\u7684\u5e94\u7528\u573a\u666f\uff0c\u6bd4\u5982\uff1a\u9274\u6743\u3001\u6d41\u91cf\u8f6c\u53d1\u3001\u8bf7\u6c42\u7edf\u8ba1\u7b49 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42],"tags":[250],"class_list":["post-891","post","type-post","status-publish","format-standard","hentry","category-spring-cloud","tag-zuul"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/891","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=891"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/891\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}