alluxio.util.network.HttpUtils.java Source code

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Here is the source code for alluxio.util.network.HttpUtils.java

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/*
 * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
 * (the "License"). You may not use this work except in compliance with the License, which is
 * available at www.apache.org/licenses/LICENSE-2.0
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied, as more fully set forth in the License.
 *
 * See the NOTICE file distributed with this work for information regarding copyright ownership.
 */

package alluxio.util.network;

import com.google.common.base.Preconditions;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.PostMethod;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * Utility methods for working with http.
 */
public final class HttpUtils {
    private static final Logger LOG = LoggerFactory.getLogger(HttpUtils.class);

    private HttpUtils() {
    }

    /**
     * Uses the post method to send a url with arguments by http, this method can call RESTful Api.
     *
     * @param url the http url
     * @param timeout milliseconds to wait for the server to respond before giving up
     * @param processInputStream the response body stream processor
     */
    public static void post(String url, Integer timeout, IProcessInputStream processInputStream)
            throws IOException {
        Preconditions.checkNotNull(timeout, "timeout");
        Preconditions.checkNotNull(processInputStream, "processInputStream");
        PostMethod postMethod = new PostMethod(url);
        try {
            HttpClient httpClient = new HttpClient();
            httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(timeout);
            httpClient.getHttpConnectionManager().getParams().setSoTimeout(timeout);
            int statusCode = httpClient.executeMethod(postMethod);
            if (statusCode == HttpStatus.SC_OK || statusCode == HttpStatus.SC_CREATED) {
                InputStream inputStream = postMethod.getResponseBodyAsStream();
                processInputStream.process(inputStream);
            } else {
                throw new IOException("Failed to perform POST request. Status code: " + statusCode);
            }
        } finally {
            postMethod.releaseConnection();
        }
    }

    /**
     * Uses the post method to send a url with arguments by http, this method can call RESTful Api.
     *
     * @param url the http url
     * @param timeout milliseconds to wait for the server to respond before giving up
     * @return the response body stream as UTF-8 string if response status is OK or CREATED
     */
    public static String post(String url, Integer timeout) throws IOException {
        final StringBuilder contentBuffer = new StringBuilder();
        post(url, timeout, new IProcessInputStream() {
            @Override
            public void process(InputStream inputStream) throws IOException {
                try (BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"))) {
                    String line;
                    while ((line = br.readLine()) != null) {
                        contentBuffer.append(line);
                    }
                }
            }
        });
        return contentBuffer.toString();
    }

    /**
     * This interface should be implemented by the http response body stream processor.
     */
    public interface IProcessInputStream {
        /**
         * @param inputStream the input stream to process
         */
        void process(InputStream inputStream) throws IOException;
    }
}