How to call a microservice to fetch data in spring webflux - spring

Question

I want to call a microservice from another service using webclient in spring flux. But, I am not able to write the code properly. Can you please suggest how to call another service. Please find my code as below.
I need to call the below service
public Mono<ServerResponse> load(ServerRequest res){
String c1name = res.pathVariable("cust");
String c2name = res.queryParam("cl").orElse("");
String oname = res.queryParam("ol").orElse("");
return res.body()
}
public Mono<ResponseEntity<Void>> ftpFileSend(MultipartFile fileData, String cust, MultiValueMap<String,String) qpar {
MultiValueMap<String,String> qpar=new LinkedMultiValueMap<String,String>();
qpar.add("name","spring");
MultiValueMap<String,Object> body=new LinkedMultiValueMap<String,Object>();
String url="http://localhost:8088/"+ cust+"/load";
try {
body.add("file", fileData.getBytes());
} catch (IOException e) {
return Mono.error(e); // <-- note how to create an error signal
}
return webClient
.post()
.uri(uriBuilder -> uriBuilder.path(url).queryParams(qpar).build() )
.contentType(MediaType.MULTIPART_FORM_DATA)
.body(BodyInserters.fromMultipartData(body))
.retrieve()
.toBodilessEntity();
}

Answer 1

Hmm it would be great if you have provided some error logs or so. Anyway if you want to create a multipart body there is a builder, MultipartBodyBuilder (in org.springframework.http.client.MultipartBodyBuilder).
Example usage is as follows,
MultipartBodyBuilder builder = new MultipartBodyBuilder();
builder.part("file", new MultipartFileResource(fileData));
MultiValueMap<String, HttpEntity<?>> multipartBody = builder.build();
Then use this multipartBody in webClient call.
return webClient
...
.body(BodyInserters.fromMultipartData(multipartBody))
.retrieve()
.toBodilessEntity();