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This article mainly explains "how springcloud integrates gateway to achieve gateway global filter function". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how springcloud integrates gateway to achieve gateway global filter function".

1. Code implementation:

Add a custom global filter

/ * customize a global filter * to implement globalfilter, ordered API * / @ Componentpublic class LoginFilter implements GlobalFilter, Ordered {/ * execute the business logic in the filter * to judge the access-token in the request parameters * if this parameter exists: it indicates that the authentication has been successful * if this parameter does not exist: authentication failed. * ServerWebExchange: equivalent to the context of request and response (RequestContext in zuul) * / @ Override public Mono filter (ServerWebExchange exchange, GatewayFilterChain chain) {System.out.println ("custom global filter"); / / 1. Get the request parameter access-token String token = exchange.getRequest (). GetQueryParams (). GetFirst ("access-token"); / / 2. Determine whether there is an if (token = = null) {/ / 3. If it does not exist: authentication failed System.out.println ("no login"); exchange.getResponse () .setStatusCode (HttpStatus.UNAUTHORIZED); return exchange.getResponse () .setComplete (); / / request end} / / 4. If it exists, continue to execute return chain.filter (exchange); / / continue to execute} / * * to specify the order in which the filter is executed. The smaller the return value, the higher the priority of execution * / @ Override public int getOrder () {return 0;}} 2. Achieve results:

Start nacos, and then start project gateway-service, gateway-client. Open a browser to access

Http://localhost:8001/client/index

Visit http://localhost:8001/client/index?access-token=token

After you add token, you can access it.

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