2 * ============LICENSE_START====================================
3 * DCAEGEN2-SERVICES-SDK
4 * =========================================================
5 * Copyright (C) 2019 Nokia. All rights reserved.
6 * =========================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=====================================
21 package org.onap.dcaegen2.services.sdk.rest.services.adapters.http;
23 import com.google.gson.Gson;
24 import io.netty.handler.codec.http.HttpStatusClass;
25 import io.netty.handler.ssl.SslContext;
26 import io.vavr.collection.Stream;
27 import java.io.IOException;
28 import java.util.Collections;
30 import java.util.function.BiConsumer;
31 import java.util.stream.Collectors;
32 import org.onap.dcaegen2.services.sdk.rest.services.model.logging.RequestDiagnosticContext;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
35 import reactor.core.publisher.Mono;
36 import reactor.netty.http.client.HttpClient;
37 import reactor.netty.http.client.HttpClientRequest;
38 import reactor.netty.http.client.HttpClientResponse;
41 * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 11/15/18
44 public class CloudHttpClient {
46 private static final Logger LOGGER = LoggerFactory.getLogger(CloudHttpClient.class);
47 private final Gson gson = new Gson();
48 private final HttpClient httpClient;
50 public CloudHttpClient() {
51 this(HttpClient.create());
54 public CloudHttpClient(SslContext sslContext) {
55 this(HttpClient.create().secure(sslContextSpec -> sslContextSpec.sslContext(sslContext)));
58 private CloudHttpClient(HttpClient httpClient) {
59 this.httpClient = httpClient;
63 public <T> Mono<T> get(String url, RequestDiagnosticContext context, Class<T> bodyClass) {
64 return get(url, context, Collections.EMPTY_MAP, bodyClass);
67 public <T> Mono<T> get(String url, RequestDiagnosticContext context, Map<String, String> customHeaders, Class<T> bodyClass) {
68 final HttpClient clientWithHeaders = httpClient
69 .doOnRequest((req, conn) -> logRequest(context, req))
70 .doOnResponse((rsp, conn) -> logResponse(context, rsp))
71 .headers(hdrs -> context.remoteCallHttpHeaders().forEach((BiConsumer<String, String>) hdrs::set))
72 .headers(hdrs -> customHeaders.forEach(hdrs::set));
73 return callHttpGet(clientWithHeaders, url, bodyClass);
76 public <T> Mono<T> get(String url, Class<T> bodyClass) {
77 return callHttpGet(httpClient, url, bodyClass);
80 private <T> Mono<T> callHttpGet(HttpClient client, String url, Class<T> bodyClass) {
83 .responseSingle((resp, content) -> HttpStatusClass.SUCCESS.contains(resp.status().code())
85 : Mono.error(createException(url, resp)))
86 .map(body -> parseJson(body, bodyClass));
89 private Exception createException(String url, HttpClientResponse response) {
90 return new IOException(String.format("Request failed for URL '%s'. Response code: %s",
95 private <T> T parseJson(String body, Class<T> bodyClass) {
96 return gson.fromJson(body, bodyClass);
99 private void logRequest(RequestDiagnosticContext context, HttpClientRequest httpClientRequest) {
100 context.withSlf4jMdc(LOGGER.isDebugEnabled(), () -> {
101 LOGGER.debug("Request: {} {}", httpClientRequest.method(), httpClientRequest.uri());
102 if (LOGGER.isTraceEnabled()) {
103 final String headers = Stream.ofAll(httpClientRequest.requestHeaders())
104 .map(entry -> entry.getKey() + "=" + entry.getValue())
105 .collect(Collectors.joining("\n"));
106 LOGGER.trace(headers);
111 private void logResponse(RequestDiagnosticContext context, HttpClientResponse httpClientResponse) {
112 context.withSlf4jMdc(LOGGER.isDebugEnabled(), () -> {
113 LOGGER.debug("Response status: {}", httpClientResponse.status());