How to POST form-url-encoded data with Spring Cloud Feign

Question

Using spring-mvc annotations, how can I define an @FeignClient that can POST form-url-encoded?

Answer 1

You must use FormEncoder in Feign encoder for url-form-encoded data in POST.

Include the dependency to your app:

Maven:

  io.github.openfeign.form
  feign-form
  3.8.0

Add FormEncoder to your Feign.Builder like so:

SomeFeign sample  = Feign.builder()
                      .encoder(new FormEncoder(new JacksonEncoder()))
                      .target(SomeFeign.class, "http://sample.test.org");

In the Feign interface

@RequestLine("POST /submit/form")
@Headers("Content-Type: application/x-www-form-urlencoded")
void from (@Param("field1") String field1, @Param("field2") String field2);

Ref for more info: https://github.com/OpenFeign/feign-form