/
HttpResourceAccessor.java
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/
HttpResourceAccessor.java
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/*
* Copyright 2012 the original author or authors.
*
* 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.gradle.internal.resource.transport.http;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpRequestBase;
import org.gradle.api.Nullable;
import org.gradle.internal.resource.metadata.ExternalResourceMetaData;
import org.gradle.internal.resource.transfer.ExternalResourceAccessor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Closeable;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
public class HttpResourceAccessor implements ExternalResourceAccessor {
private static final Logger LOGGER = LoggerFactory.getLogger(HttpResourceAccessor.class);
private final HttpClientHelper http;
private final List<HttpResponseResource> openResources = new ArrayList<HttpResponseResource>();
public HttpResourceAccessor(HttpClientHelper http) {
this.http = http;
}
@Nullable
public HttpResponseResource openResource(final URI uri) {
abortOpenResources();
String location = uri.toString();
LOGGER.debug("Constructing external resource: {}", location);
CloseableHttpResponse response = http.performGet(location);
if (response != null) {
HttpResponseResource resource = wrapResponse(uri, response);
return recordOpenGetResource(resource);
}
return null;
}
/**
* Same as #getResource except that it always gives access to the response body,
* irrespective of the returned HTTP status code. Never returns {@code null}.
*/
public HttpResponseResource getRawResource(final URI uri) {
abortOpenResources();
String location = uri.toString();
LOGGER.debug("Constructing external resource: {}", location);
HttpRequestBase request = new HttpGet(uri);
CloseableHttpResponse response;
try {
response = http.performHttpRequest(request);
} catch (IOException e) {
throw new HttpRequestException(String.format("Could not %s '%s'.", request.getMethod(), request.getURI()), e);
}
HttpResponseResource resource = wrapResponse(uri, response);
return recordOpenGetResource(resource);
}
public ExternalResourceMetaData getMetaData(URI uri) {
abortOpenResources();
String location = uri.toString();
LOGGER.debug("Constructing external resource metadata: {}", location);
CloseableHttpResponse response = http.performHead(location);
return response == null ? null : new HttpResponseResource("HEAD", uri, response).getMetaData();
}
private HttpResponseResource recordOpenGetResource(HttpResponseResource httpResource) {
openResources.add(httpResource);
return httpResource;
}
private void abortOpenResources() {
for (Closeable openResource : openResources) {
LOGGER.warn("Forcing close on abandoned resource: {}", openResource);
try {
openResource.close();
} catch (IOException e) {
LOGGER.warn("Failed to close abandoned resource", e);
}
}
openResources.clear();
}
private HttpResponseResource wrapResponse(URI uri, CloseableHttpResponse response) {
return new HttpResponseResource("GET", uri, response) {
@Override
public void close() throws IOException {
super.close();
HttpResourceAccessor.this.openResources.remove(this);
}
};
}
}