I'm trying to log a request using Spring 5 WebClient. Do you have any idea how could I achieve that?
(I'm using Spring 5 and Spring boot 2)
The code looks like this at the moment:
try {
return webClient.get().uri(url, urlParams).exchange().flatMap(response -> response.bodyToMono(Test.class))
.map(test -> xxx.set(test));
} catch (RestClientException e) {
log.error("Cannot get counter from opus", e);
throw e;
}
You can easily do it using ExchangeFilterFunction
Just add the custom logRequest
filter when you create your WebClient
using WebClient.Builder
.
Here is the example of such filter and how to add it to the WebClient
.
@Slf4j
@Component
public class MyClient {
private final WebClient webClient;
// Create WebClient instance using builder.
// If you use spring-boot 2.0, the builder will be autoconfigured for you
// with the "prototype" scope, meaning each injection point will receive
// a newly cloned instance of the builder.
public MyClient(WebClient.Builder webClientBuilder) {
webClient = webClientBuilder // you can also just use WebClient.builder()
.baseUrl("https://httpbin.org")
.filter(logRequest()) // here is the magic
.build();
}
// Just example of sending request
public void send(String path) {
ClientResponse clientResponse = webClient
.get().uri(uriBuilder -> uriBuilder.path(path)
.queryParam("param", "value")
.build())
.exchange()
.block();
log.info("Response: {}", clientResponse.toEntity(String.class).block());
}
// This method returns filter function which will log request data
private static ExchangeFilterFunction logRequest() {
return ExchangeFilterFunction.ofRequestProcessor(clientRequest -> {
log.info("Request: {} {}", clientRequest.method(), clientRequest.url());
clientRequest.headers().forEach((name, values) -> values.forEach(value -> log.info("{}={}", name, value)));
return Mono.just(clientRequest);
});
}
}
Then just call myClient.send("get");
and log messages should be there.
Output example:
Request: GET https://httpbin.org/get?param=value
header1=value1
header2=value2