it.gulch.linuxday.android.utils.HttpUtils.java Source code

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Here is the source code for it.gulch.linuxday.android.utils.HttpUtils.java

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/*
 * Copyright 2014 Christophe Beyls
 *
 * 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 it.gulch.linuxday.android.utils;

import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.support.v4.content.LocalBroadcastManager;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

/**
 * Utility class to perform HTTP requests.
 *
 * @author Christophe Beyls
 */
public class HttpUtils {
    private static final int DEFAULT_TIMEOUT = 10000;

    static {
        // HTTP connection reuse was buggy pre-froyo
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.FROYO) {
            System.setProperty("http.keepAlive", "false");
        }

        // Bypass hostname verification
        HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        });

        // Trust all HTTPS certificates
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return new java.security.cert.X509Certificate[] {};
            }

            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }
        } };
        try {
            SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(null, trustAllCerts, new java.security.SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static InputStream get(Context context, String path) throws IOException {
        return get(context, new URL(path), null, null);
    }

    public static InputStream get(Context context, String path, String progressAction, String progressExtra)
            throws IOException {
        return get(context, new URL(path), progressAction, progressExtra);
    }

    public static InputStream get(final Context context, URL url, final String progressAction,
            final String progressExtra) throws IOException {
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setReadTimeout(DEFAULT_TIMEOUT);
        connection.setConnectTimeout(DEFAULT_TIMEOUT);
        connection.connect();

        if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
            connection.disconnect();

            throw new IOException("Server returned response code: " + connection.getResponseCode());
        }

        final int length = connection.getContentLength();
        InputStream is = new BufferedInputStream(connection.getInputStream());
        if ((progressAction == null) || (length == -1)) {
            // No progress support
            return is;
        }

        // Broadcast the progression in percents, with a precision of 1/10 of the total file size
        return new ByteCountInputStream(is, new ByteCountInputStream.ByteCountListener() {

            private LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(context);

            @Override
            public void onNewCount(int byteCount) {
                // Cap percent to 100
                int percent = (byteCount >= length) ? 100 : byteCount * 100 / length;
                lbm.sendBroadcast(new Intent(progressAction).putExtra(progressExtra, percent));
            }
        }, length / 10);
    }
}