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/*
* Copyright (C) 2018 Bell Canada.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onap.ccsdk.sli.adaptors.netbox.impl;
import static org.apache.http.HttpHeaders.ACCEPT;
import static org.apache.http.HttpHeaders.AUTHORIZATION;
import static org.apache.http.HttpHeaders.CONTENT_TYPE;
import java.io.IOException;
import java.nio.charset.Charset;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.util.Scanner;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.function.Function;
import javax.net.ssl.SSLContext;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.concurrent.FutureCallback;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.ssl.TrustStrategy;
import org.onap.ccsdk.sli.adaptors.netbox.api.IpamException;
import org.onap.ccsdk.sli.adaptors.netbox.property.NetboxProperties;
public class NetboxHttpClient implements AutoCloseable {
private static final String APPLICATION_JSON = "application/json";
private final CloseableHttpAsyncClient client;
private final String url;
private final String token;
// Used by the blueprint container
public NetboxHttpClient(NetboxProperties properties) {
this(properties.getHost(), properties.getApiKey());
}
NetboxHttpClient(final String url, final String token) {
this.url = url;
this.token = token;
final TrustStrategy acceptingTrustStrategy = (certificate, authType) -> true;
final SSLContext sslContext;
try {
sslContext = SSLContexts.custom()
.loadTrustMaterial(null, acceptingTrustStrategy).build();
} catch (final NoSuchAlgorithmException | KeyManagementException | KeyStoreException e) {
throw new IllegalStateException("Can't create http client", e);
}
client = HttpAsyncClientBuilder.create()
.setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
.setSSLContext(sslContext)
.build();
}
// Has to be public for blueprint container to access it
public void init() {
client.start();
}
@Override
public void close() throws IOException {
client.close();
}
CompletionStage<HttpResponse> post(final String uri, final String requestBody) {
return sendRequest(uri, requestBody, HttpPost::new);
}
CompletionStage<HttpResponse> delete(final String uri) {
return sendRequest(uri, HttpDelete::new);
}
static String getBodyAsString(final HttpResponse response) {
final String body;
if (response.getEntity() != null) {
try (final Scanner s = new java.util.Scanner(response.getEntity().getContent()).useDelimiter("\\A")) {
body = s.hasNext() ? s.next() : "";
} catch (final IOException e) {
throw new IllegalStateException(e);
}
} else {
body = "";
}
return response.toString() + "\n" + body;
}
private <T extends HttpUriRequest> CompletionStage<HttpResponse> sendRequest(final String uri,
final Function<String, T> supplier) {
final T request = supplier.apply(url + uri);
request.addHeader(ACCEPT, APPLICATION_JSON);
request.addHeader(CONTENT_TYPE, APPLICATION_JSON);
request.addHeader(AUTHORIZATION, "Token " + token);
return sendRequest(request);
}
private <T extends HttpEntityEnclosingRequest & HttpUriRequest>
CompletionStage<HttpResponse> sendRequest(final String uri, final String body,
final Function<String, T> supplier) {
final T request = supplier.apply(url + uri);
request.addHeader(ACCEPT, APPLICATION_JSON);
request.addHeader(CONTENT_TYPE, APPLICATION_JSON);
request.addHeader(AUTHORIZATION, "Token " + token);
request.setEntity(new StringEntity(body, Charset.forName("UTF-8")));
return sendRequest(request);
}
private CompletionStage<HttpResponse> sendRequest(final HttpUriRequest request) {
final CompletableFuture<HttpResponse> future = new CompletableFuture<>();
client.execute(request, new FutureCallback<HttpResponse>() {
@Override
public void completed(final HttpResponse httpResponse) {
future.complete(httpResponse);
}
@Override
public void failed(final Exception e) {
future.completeExceptionally(new IpamException("Netbox request failed", e));
}
@Override
public void cancelled() {
future.cancel(false);
}
});
return future;
}
}
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