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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Modifications Copyright © 2018 IBM.
* ================================================================================
* 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.aai.restclient;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;
public abstract class RestClient {
private static Logger log = LoggerFactory.getLogger(RestClient.class);
@Value("${spring.application.name}")
protected String appName;
/**
* Execute the given http method against the uri with passed headers
*
* @param uri properly encoded, can include query params also properly encoded
* @param method http method of the request
* @param headers headers for the request
* @param body body of the request
* @return response of request
* @throws RestClientException on internal rest template exception or invalid url
*/
public ResponseEntity<String> execute(String uri, HttpMethod method, Map<String, String> headers, String body)
throws RestClientException {
HttpEntity<String> httpEntity;
log.debug("Request Headers: {}", headers);
if (body == null) {
httpEntity = new HttpEntity<>(getHeaders(headers));
} else {
httpEntity = new HttpEntity<>(body, getHeaders(headers));
}
// verify that either the base url ends with '/' or uri starts with '/', adjust uri accordingly.
if (getBaseUrl().endsWith("/") && uri.startsWith("/")) {
uri = uri.replaceFirst("/", "");
} else if (!getBaseUrl().endsWith("/") && !uri.startsWith("/")) {
uri = "/" + uri;
}
URI url;
try {
url = new URI(getBaseUrl() + uri);
} catch (URISyntaxException e) {
log.error("URL syntax error with url {}{}", getBaseUrl(), uri);
throw new RestClientException(e.getMessage());
}
log.debug("METHOD={}, URL={}, BODY={}", method, url, httpEntity.getBody());
ResponseEntity<String> responseEntity = getRestTemplate().exchange(url, method, httpEntity, String.class);
log.trace("RESPONSE={}", responseEntity);
return responseEntity;
}
/**
* Execute the given http method against the uri with passed headers
*
* @param uri properly encoded, can include query params also properly encoded
* @param method http method of the request
* @param headers headers for the request
* @param body body of the request
* @return response of request
* @throws RestClientException on internal rest template exception or invalid url
*/
public ResponseEntity<String> execute(String uri, String method, Map<String, String> headers, String body)
throws RestClientException {
return execute(uri, HttpMethod.valueOf(method), headers, body);
}
/**
* Execute the given http method against the uri with passed headers
*
* @param uri properly encoded, can include query params also properly encoded
* @param method http method of the request
* @param headers headers for the request
* @return response of request
* @throws RestClientException on internal rest template exception or invalid url
*/
public ResponseEntity<String> execute(String uri, HttpMethod method, Map<String, String> headers)
throws RestClientException {
return execute(uri, method, headers, null);
}
/**
* Execute the given http method against the uri with passed headers
*
* @param uri properly encoded, can include query params also properly encoded
* @param method http method of the request
* @param headers headers for the request
* @return response of request
* @throws RestClientException on internal rest template exception or invalid url
*/
public ResponseEntity<String> execute(String uri, String method, Map<String, String> headers)
throws RestClientException {
return execute(uri, HttpMethod.valueOf(method), headers, null);
}
public ResponseEntity<Resource> executeResource(String uri, HttpMethod method, Map<String, String> headers,
String body) throws RestClientException {
HttpEntity<String> httpEntity;
log.debug("Headers: " + headers.toString());
if (body == null) {
httpEntity = new HttpEntity(getHeaders(headers));
} else {
httpEntity = new HttpEntity(body, getHeaders(headers));
}
String url = getBaseUrl() + uri;
return getRestTemplate().exchange(url, method, httpEntity, Resource.class);
}
public ResponseEntity<String> getGetRequest(String content, String uri, Map<String, String> headersMap) {
return this.execute(uri, HttpMethod.GET, headersMap, content);
}
public ResponseEntity<Resource> getGetResource(String content, String uri, Map<String, String> headersMap) {
return this.executeResource(uri, HttpMethod.GET, headersMap, content);
}
public abstract RestTemplate getRestTemplate();
public abstract String getBaseUrl();
protected abstract MultiValueMap<String, String> getHeaders(Map<String, String> headers);
}
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