A MappingJackson2HttpMessageConverter that forces the response Content-Type header to be application/json

ContentTypeMappingJackson2HttpMessageConverter.java

public class ContentTypeMappingJackson2HttpMessageConverter extends MappingJackson2HttpMessageConverter {

    /**
     * Always set the Content-Type response header to application/json when using the Jackson message converter
     *
     * Without this there appears to be a conflict with Meteor/Atmosphere servlet that causes Spring
     * to leave the Content-Type blank in the response
     * https://groups.google.com/forum/#!topic/atmosphere-framework/uZOrfXl3Bu8
     */
    @Override
    protected void writeInternal(Object object, HttpOutputMessage outputMessage)
            throws IOException, HttpMessageNotWritableException {
        outputMessage.getHeaders().setContentType(MediaType.APPLICATION_JSON);

        super.writeInternal(object, outputMessage);
    }
}

where should we place this class?

@greatbody, you'll need to register it as a messageConverter, usually in a WebMvcConfigurer extension class.

sorry for the slow response, apparently github still doesn't notify for comments on gists...