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/*
* ============LICENSE_START=======================================================
* aaf-certservice-client
* ================================================================================
* Copyright (C) 2020 Nokia. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aaf.certservice.client.httpclient;
import com.google.gson.Gson;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.onap.aaf.certservice.client.httpclient.exception.CertServiceApiResponseException;
import org.onap.aaf.certservice.client.httpclient.exception.HttpClientException;
import org.onap.aaf.certservice.client.httpclient.model.CertServiceResponse;
import org.onap.aaf.certservice.client.httpclient.model.ErrorCertServiceResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
public class HttpClient {
private static final Logger LOGGER = LoggerFactory.getLogger(HttpClient.class);
private static final String CSR_HEADER_NAME = "CSR";
private static final String PK_HEADER_NAME = "PK";
private static final String CHARSET_UTF_8 = "UTF-8";
private final Gson gson = new Gson();
private final CloseableHttpsClientProvider httpClientProvider;
private final String certServiceAddress;
public HttpClient(CloseableHttpsClientProvider httpClientProvider, String certServiceAddress) {
this.httpClientProvider = httpClientProvider;
this.certServiceAddress = certServiceAddress;
}
public CertServiceResponse retrieveCertServiceData(String caName, String csr, String encodedPk)
throws CertServiceApiResponseException, HttpClientException {
try (CloseableHttpClient httpClient = httpClientProvider.getClient()) {
LOGGER.info("Attempt to send request to API, on url: {}{} ", certServiceAddress, caName);
HttpResponse httpResponse = httpClient.execute(createHttpRequest(caName, csr, encodedPk));
LOGGER.info("Received response from API");
return extractCertServiceResponse(httpResponse);
} catch (IOException e) {
LOGGER.error("Failed execute request to API for URL: {}{} , exception message: {}",
certServiceAddress, caName, e.getMessage());
throw new HttpClientException(e);
}
}
private HttpGet createHttpRequest(String caName, String csr, String pk) {
String url = certServiceAddress + caName;
HttpGet httpGet = new HttpGet(url);
httpGet.addHeader(CSR_HEADER_NAME, csr);
httpGet.addHeader(PK_HEADER_NAME, pk);
return httpGet;
}
private CertServiceResponse extractCertServiceResponse(HttpResponse httpResponse)
throws CertServiceApiResponseException, HttpClientException {
int httpResponseCode = getStatusCode(httpResponse);
if (HttpStatus.SC_OK != httpResponseCode) {
LOGGER.error("Error on API response. Response Code: {}", httpResponseCode);
throw generateApiResponseException(httpResponse);
}
String jsonResponse = getStringResponse(httpResponse.getEntity());
return gson.fromJson(jsonResponse, CertServiceResponse.class);
}
private CertServiceApiResponseException generateApiResponseException(HttpResponse httpResponse)
throws HttpClientException {
String stringResponse = getStringResponse(httpResponse.getEntity());
ErrorCertServiceResponse errorCertServiceResponse =
gson.fromJson(stringResponse, ErrorCertServiceResponse.class);
return new CertServiceApiResponseException(getStatusCode(httpResponse), errorCertServiceResponse.getMessage());
}
private int getStatusCode(HttpResponse httpResponse) {
return httpResponse.getStatusLine().getStatusCode();
}
private String getStringResponse(HttpEntity httpEntity) throws HttpClientException {
try {
return EntityUtils.toString(httpEntity, CHARSET_UTF_8);
} catch (IOException e) {
LOGGER.error("Cannot parse response to string, exception message: {}", e.getMessage());
throw new HttpClientException(e);
}
}
}
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