CODEWITHSUNDEEP
springspring-bootspring-cloud-gateway
ha22109
ha22109

Reputation: 8326

How to change uri in spring gateway via gateway filter

below are my routes defined

        - id: myId
          uri: http://localhost:4010/
          predicates:
            - Path=/test/helloworld
            - Method=POST
          filters:
            - ModifyUri

Based on the request , i want to change the uri so that i can forward the request to different host. I created a filter ModifyUri but its still forwarding the request to uri defined in my routes.

Here is sample

  ServerHttpRequest.Builder builder = exchange.getRequest().mutate();
URI modifiedUri = URI.create("http://localhost:8999/new-path");
ServerHttpRequest modifiedRequest = builder
                    .uri(modifiedUri)
                    .build();
            return chain.filter(exchange.mutate().request(modifiedRequest).build());

Upvotes: 0

Views: 1041

Answers (2)

SongChay Beng
SongChay Beng

Reputation: 118

You can use changeRequestUri:

.route( "myId", r -> r.path( "/test/helloworld" )
                    //.filters( f -> f.filters( testFilter, filter )
                            //.stripPrefix( 1 )
                            .changeRequestUri( exchange -> {
                                    //exchange.getResponse().getHeaders().add("X-Rate-Limit-Remaining", "0");
                                //String path = xchange.getRequest().getURI().getRawPath();
                                
                                    return Optional.of( URI.create( "$newUri + $path" ) );
                            }) 
                    ).uri( "http://localhost:4010" ) )

Upvotes: 0

Sandra Markerud
Sandra Markerud

Reputation: 69

Not sure why you would want to change the uri. Normally, you define per route to which host you want to route to. Of course you can do a path rewrite, e.g.;

    - id: myId
      uri: http://localhost:4010/
      predicates:
        - Path=/test/helloworld
        - Method=POST
      filters:
        - RewritePath=/test/helloworld, /new-path

But changing the routing target is not possible afaik. If you need to route to a different host, define a new route. The criteria to determine which route should match (e.g. headers, dates, query-parameters,…) are defined as predicates. Therefore, I really can’t imagine a use case where you would need to change the uri ad hoc. Which specific use case do you have in mind that can’t be solved with fillers and predicates? Maybe then it would be easier, to find a solution

Upvotes: -1

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