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The AWS SDK for Java - Core module holds the classes that are used by the individual service clients to interact with Amazon Web Services. Users need to depend on aws-java-sdk artifact for accessing individual client classes.
/*
* Copyright 2011-2020 Amazon.com, Inc. or its affiliates. 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://aws.amazon.com/apache2.0
*
* This file 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 com.amazonaws.internal;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.Proxy;
import java.net.URI;
import java.util.Map;
import com.amazonaws.annotation.SdkInternalApi;
@SdkInternalApi
public class ConnectionUtils {
private ConnectionUtils() {
}
public static ConnectionUtils getInstance() {
return ConnectionUtilsSingletonHolder.INSTANCE;
}
public HttpURLConnection connectToEndpoint(URI endpoint, Map headers) throws IOException {
return connectToEndpoint(endpoint, headers, "GET");
}
public HttpURLConnection connectToEndpoint(URI endpoint, Map headers, String method) throws IOException {
HttpURLConnection connection = (HttpURLConnection) endpoint.toURL().openConnection(Proxy.NO_PROXY);
connection.setConnectTimeout(1000);
connection.setReadTimeout(1000);
connection.setRequestMethod(method);
connection.setDoOutput(true);
for (Map.Entry header : headers.entrySet()) {
connection.addRequestProperty(header.getKey(), header.getValue());
}
// TODO should we autoredirect 3xx
// connection.setInstanceFollowRedirects(false);
connection.connect();
return connection;
}
private static final class ConnectionUtilsSingletonHolder {
private static final ConnectionUtils INSTANCE = new ConnectionUtils();
}
}