/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.syncope.client.services.proxy;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import javax.ws.rs.InternalServerErrorException;
import javax.ws.rs.core.Response;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.auth.AuthScope;
import org.apache.http.client.AuthCache;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.syncope.client.http.PreemptiveAuthHttpRequestFactory;
import org.apache.syncope.common.SyncopeConstants;
import org.springframework.web.client.RestTemplate;
public abstract class SpringServiceProxy {
protected String baseUrl;
private RestTemplate restTemplate;
public SpringServiceProxy(final String baseUrl, final RestTemplate restTemplate) {
this.baseUrl = baseUrl;
this.restTemplate = restTemplate;
}
public void setRestTemplate(final RestTemplate restTemplate) {
this.restTemplate = restTemplate;
}
public RestTemplate getRestTemplate() {
return restTemplate;
}
protected Response handleStream(final String url) {
final AuthScope scope = ((PreemptiveAuthHttpRequestFactory) getRestTemplate().getRequestFactory()).
getAuthScope();
final HttpHost targetHost = new HttpHost(scope.getHost(), scope.getPort(), scope.getScheme());
final BasicHttpContext localcontext = new BasicHttpContext();
final AuthCache authCache = new BasicAuthCache();
authCache.put(targetHost, new BasicScheme());
localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache);
final HttpGet getMethod = new HttpGet(url);
try {
final HttpResponse httpResponse =
((PreemptiveAuthHttpRequestFactory) getRestTemplate().getRequestFactory()).
getHttpClient().execute(targetHost, getMethod, localcontext);
Response response;
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
HttpEntity entity = httpResponse.getEntity();
response = Response.ok(entity.getContent(), entity.getContentType().getValue()).
header(SyncopeConstants.CONTENT_DISPOSITION_HEADER,
httpResponse.getLastHeader(SyncopeConstants.CONTENT_DISPOSITION_HEADER).getValue()).
build();
} else {
response = Response.noContent().status(httpResponse.getStatusLine().getStatusCode()).
build();
}
return response;
} catch (IOException e) {
throw new InternalServerErrorException(e);
}
}
@SuppressWarnings("unchecked")
protected Collection<String> handlePossiblyEmptyStringCollection(final String url) {
Collection<String> result = Collections.<String>emptySet();
final Object object = getRestTemplate().getForObject(url, Object.class);
if (object instanceof String) {
String string = (String) object;
result = Collections.singleton(string);
} else if (object instanceof Collection) {
result = (Collection<String>) object;
}
return result;
}
}