OpenAiClient.java

    private RestClient buildRestClient(OpenAiClientConfig clientConfig, RestClient.Builder restClientBuilder) {

        var settings = new ClientHttpRequestFactorySettings(
                clientConfig.connectTimeout(), clientConfig.readTimeout(), SslBundle.of(null));
        var requestFactory = ClientHttpRequestFactories.get(settings);

        Consumer<HttpHeaders> defaultHeaders = headers -> {
            headers.setContentType(MediaType.APPLICATION_JSON);
            if (StringUtils.hasText(clientConfig.apiKey())) {
                headers.setBearerAuth(clientConfig.apiKey());
            }
        };

        return restClientBuilder.requestFactory(requestFactory)
                .baseUrl(clientConfig.baseUrl().toString())
                .defaultHeaders(defaultHeaders)
                .defaultStatusHandler(responseErrorHandler)
                .requestInterceptors(interceptors -> {
                    if (clientConfig.logRequests() || clientConfig.logResponses()) {
                        interceptors
                                .add(new HttpLoggingInterceptor(clientConfig.logRequests(), clientConfig.logResponses()));
                    }
                })
                .build();
    }