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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.so.rest.service;
import org.onap.so.configuration.rest.BasicHttpHeadersProvider;
import org.onap.so.configuration.rest.HttpHeadersProvider;
import org.onap.so.rest.exceptions.InvalidRestRequestException;
import org.onap.so.rest.exceptions.RestProcessingException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;
import com.google.common.base.Optional;
/**
* A Service to perform HTTP requests
*
* @author waqas.ikram@est.tech
*/
public class HttpRestServiceProviderImpl implements HttpRestServiceProvider {
private static final Logger LOGGER = LoggerFactory.getLogger(HttpRestServiceProviderImpl.class);
private final RestTemplate restTemplate;
private final HttpHeadersProvider httpHeadersProvider;
public HttpRestServiceProviderImpl(final RestTemplate restTemplate) {
this.restTemplate = restTemplate;
this.httpHeadersProvider = new BasicHttpHeadersProvider();
}
public HttpRestServiceProviderImpl(final RestTemplate restTemplate, final HttpHeadersProvider httpHeadersProvider) {
this.restTemplate = restTemplate;
this.httpHeadersProvider = httpHeadersProvider;
}
@Override
public <T> Optional<T> get(final String url, final Class<T> clazz) {
final ResponseEntity<T> response = getHttpResponse(url, clazz);
if (!response.getStatusCode().equals(HttpStatus.OK)) {
final String message =
"Unable to invoke HTTP GET using URL: " + url + ", Response Code: " + response.getStatusCode();
LOGGER.error(message);
return Optional.absent();
}
if (response.hasBody()) {
return Optional.of(response.getBody());
}
return Optional.absent();
}
@Override
public <T> ResponseEntity<T> getHttpResponse(final String url, final Class<T> clazz) {
LOGGER.trace("Will invoke HTTP GET using URL: {}", url);
try {
final HttpEntity<?> request = new HttpEntity<>(getHttpHeaders());
return restTemplate.exchange(url, HttpMethod.GET, request, clazz);
} catch (final HttpClientErrorException httpClientErrorException) {
final String message = "Unable to invoke HTTP GET using url: " + url + ", Response: "
+ httpClientErrorException.getRawStatusCode();
LOGGER.error(message, httpClientErrorException);
final int rawStatusCode = httpClientErrorException.getRawStatusCode();
if (rawStatusCode == HttpStatus.BAD_REQUEST.value() || rawStatusCode == HttpStatus.NOT_FOUND.value()) {
throw new InvalidRestRequestException("No result found for given url: " + url);
}
throw new RestProcessingException("Unable to invoke HTTP GET using URL: " + url);
} catch (final RestClientException restClientException) {
LOGGER.error("Unable to invoke HTTP GET using url: {}", url, restClientException);
throw new RestProcessingException("Unable to invoke HTTP GET using URL: " + url, restClientException);
}
}
@Override
public <T> Optional<T> post(final Object object, final String url, final Class<T> clazz) {
final ResponseEntity<T> response = postHttpRequest(object, url, clazz);
if (!response.getStatusCode().equals(HttpStatus.OK)) {
final String message =
"Unable to invoke HTTP GET using URL: " + url + ", Response Code: " + response.getStatusCode();
LOGGER.error(message);
return Optional.absent();
}
if (response.hasBody()) {
return Optional.of(response.getBody());
}
return Optional.absent();
}
@Override
public <T> ResponseEntity<T> postHttpRequest(final Object object, final String url, final Class<T> clazz) {
try {
final HttpEntity<?> request = new HttpEntity<>(object, getHttpHeaders());
return restTemplate.exchange(url, HttpMethod.POST, request, clazz);
} catch (final HttpClientErrorException httpClientErrorException) {
final String message = "Unable to invoke HTTP POST using url: " + url + ", Response: "
+ httpClientErrorException.getRawStatusCode();
LOGGER.error(message, httpClientErrorException);
final int rawStatusCode = httpClientErrorException.getRawStatusCode();
if (rawStatusCode == HttpStatus.BAD_REQUEST.value() || rawStatusCode == HttpStatus.NOT_FOUND.value()) {
throw new InvalidRestRequestException("No result found for given url: " + url);
}
throw new RestProcessingException("Unable to invoke HTTP GET using URL: " + url);
} catch (final RestClientException restClientException) {
LOGGER.error("Unable to invoke HTTP POST using url: {}", url, restClientException);
throw new RestProcessingException("Unable to invoke HTTP GET using URL: " + url, restClientException);
}
}
private HttpHeaders getHttpHeaders() {
return httpHeadersProvider.getHttpHeaders();
}
}
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