com.binroot.fatpita.Common.java Source code

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Here is the source code for com.binroot.fatpita.Common.java

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package com.binroot.fatpita;
/*
 * Copyright 2009 Andrew Shu
 *
 * This file is part of "reddit is fun".
 *
 * "reddit is fun" is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * "reddit is fun" is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with "reddit is fun".  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;

import org.apache.http.Header;
import org.apache.http.HeaderElement;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.entity.HttpEntityWrapper;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.protocol.HttpContext;

public class Common {

    private static final String TAG = "Common";

    private static final DefaultHttpClient mGzipHttpClient = createGzipHttpClient();
    // 1:subreddit 2:threadId 3:commentId

    public static DefaultHttpClient getGzipHttpClient() {
        return mGzipHttpClient;
    }

    private static DefaultHttpClient createGzipHttpClient() {
        BasicHttpParams params = new BasicHttpParams();
        SchemeRegistry schemeRegistry = new SchemeRegistry();
        schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
        ClientConnectionManager cm = new ThreadSafeClientConnManager(params, schemeRegistry);
        DefaultHttpClient httpclient = new DefaultHttpClient(cm, params);
        httpclient.addRequestInterceptor(new HttpRequestInterceptor() {
            public void process(final HttpRequest request, final HttpContext context)
                    throws HttpException, IOException {
                if (!request.containsHeader("Accept-Encoding")) {
                    request.addHeader("Accept-Encoding", "gzip");
                }
            }
        });
        httpclient.addResponseInterceptor(new HttpResponseInterceptor() {
            public void process(final HttpResponse response, final HttpContext context)
                    throws HttpException, IOException {
                HttpEntity entity = response.getEntity();
                Header ceheader = entity.getContentEncoding();
                if (ceheader != null) {
                    HeaderElement[] codecs = ceheader.getElements();
                    for (int i = 0; i < codecs.length; i++) {
                        if (codecs[i].getName().equalsIgnoreCase("gzip")) {
                            response.setEntity(new GzipDecompressingEntity(response.getEntity()));
                            return;
                        }
                    }
                }
            }
        });
        return httpclient;
    }

    static class GzipDecompressingEntity extends HttpEntityWrapper {
        public GzipDecompressingEntity(final HttpEntity entity) {
            super(entity);
        }

        @Override
        public InputStream getContent() throws IOException, IllegalStateException {
            // the wrapped entity's getContent() decides about repeatability
            InputStream wrappedin = wrappedEntity.getContent();
            return new GZIPInputStream(wrappedin);
        }

        @Override
        public long getContentLength() {
            // length of ungzipped content is not known
            return -1;
        }
    }
}