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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                PRE ``` 請求路由之前調用,可利用這種過濾器實現身份驗證,在集群中選擇請求的微服務、記錄調試信息等 ``` ROUTING ``` 將請求路由到微服務,這種過濾器用于構建發送給微服務的請求,并使用Apache HttpCLient或Netfilx Ribbon請求微服務 ``` POST ``` 路由到微服務以后執行,這種過濾器用來響應添加標準的Httpheader, 收集統計信息和指標,將響應從微服務發送給客戶端 ``` ERROR ``` 發生錯誤時執行該過濾器 ``` 自定義過濾器類型 ``` @Component public class MyFilter extends ZuulFilter { //返回過濾器的類型,有pre, route, post, error等幾種取值 @Override public String filterType() { return "pre"; } //返回一個int來指定過濾器的執行順序,不同的過濾器允許返回相同的數字 @Override public int filterOrder() { return 0; } //返回一個boolean來判斷過濾器是否要執行,true表示執行,false表示不執行 @Override public boolean shouldFilter() { return true; } // 過濾器的具體邏輯 @Override public Object run() throws ZuulException { RequestContext currentContext = RequestContext.getCurrentContext(); HttpServletRequest request = currentContext.getRequest(); String token = request.getParameter("token"); if (token == null){ currentContext.setSendZuulResponse(false); currentContext.setResponseStatusCode(401); try { currentContext.getResponse().getWriter().write("token is empty"); } catch (IOException e) { return null; } } return null; } } ```
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