Java HTTP Close closeQuietly(URLConnection cnn)

Description

close Quietly

License

Open Source License

Declaration

public static void closeQuietly(URLConnection cnn) 

Method Source Code

//package com.java2s;
/*/*  w w w .  j a v  a2  s  .com*/
 * Copyright (c) 2010-2016 the original author or authors
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

import java.io.Closeable;

import java.io.InputStream;

import java.io.Writer;
import java.net.HttpURLConnection;

import java.net.URLConnection;

public class Main {
    public static void closeQuietly(URLConnection cnn) {
        if (cnn == null) {
            return;
        } else if (cnn instanceof HttpURLConnection) {
            ((HttpURLConnection) cnn).disconnect();
        } else {
            // do nothing
        }
    }

    public static void closeQuietly(Closeable closeable) {
        if (closeable == null)
            return;
        try {
            closeable.close();
        } catch (Exception e) {
            // ignore silently
        }
    }

    public static void closeQuietly(Writer writer) {
        if (writer == null)
            return;
        try {
            writer.close();
        } catch (Exception e) {
            // ignore silently
        }
    }

    /**
     * Needed for old JVMs where {@link java.io.InputStream} does not implement {@link java.io.Closeable}.
     */
    public static void closeQuietly(InputStream inputStream) {
        if (inputStream == null)
            return;
        try {
            inputStream.close();
        } catch (Exception e) {
            // ignore silently
        }
    }
}

Related

1. closeAll(HttpURLConnection httpURLConnection, Writer writer, OutputStream outputStream)
2. closeConnection(final HttpURLConnection connection)
3. closeHttpUrlConnectionNoException(HttpURLConnection... closeables)
4. closeQuietly(HttpURLConnection connection)
5. closeQuietly(HttpURLConnection connection, Reader reader)
6. closeSilently(HttpURLConnection resource)