com.to8to.clickstream.network.BaseNetwork.java Source code

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Here is the source code for com.to8to.clickstream.network.BaseNetwork.java

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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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 com.to8to.clickstream.network;

import android.os.SystemClock;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.conn.ConnectTimeoutException;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.SocketTimeoutException;
import java.util.HashMap;
import java.util.Map;

/**
 * A network performing Volley requests over an {@link com.android.volley.toolbox.HttpStack}.
 */
public class BaseNetwork implements INetwork {

    private static int SLOW_REQUEST_THRESHOLD_MS = 3000;

    private static int DEFAULT_POOL_SIZE = 4096;

    protected final IHttpStack mHttpStack;

    protected final BytePool mPool;

    /**
     * @param httpStack HTTP stack to be used
     */
    public BaseNetwork(IHttpStack httpStack) {
        // If a pool isn't passed in, then build a small default pool that will give us a lot of
        // benefit and not use too much memory.
        this(httpStack, new BytePool(DEFAULT_POOL_SIZE));
    }

    /**
     * @param httpStack HTTP stack to be used
     * @param pool a buffer pool that improves GC performance in copy operations
     */
    public BaseNetwork(IHttpStack httpStack, BytePool pool) {
        mHttpStack = httpStack;
        mPool = pool;
    }

    @Override
    public NetworkBean performRequest(AbsRequest request) {
        long requestStart = SystemClock.elapsedRealtime();
        while (true) {
            HttpResponse httpResponse = null;
            byte[] responseContents = null;
            Map<String, String> responseHeaders = new HashMap<String, String>();
            try {
                // Gather headers.
                Map<String, String> headers = new HashMap<String, String>();
                httpResponse = mHttpStack.performRequest(request);
                StatusLine statusLine = httpResponse.getStatusLine();
                int statusCode = statusLine.getStatusCode();
                responseHeaders = convertHeaders(httpResponse.getAllHeaders());
                responseContents = entityToBytes(httpResponse.getEntity());
                if (statusCode != HttpStatus.SC_OK && statusCode != HttpStatus.SC_NO_CONTENT) {
                    throw new IOException();
                }
                return new NetworkBean(statusCode, responseContents, responseHeaders);
            } catch (SocketTimeoutException e) {

            } catch (ConnectTimeoutException e) {

            } catch (MalformedURLException e) {

            } catch (IOException e) {

            }
        }
    }

    /** Reads the contents of HttpEntity into a byte[]. */
    private byte[] entityToBytes(HttpEntity entity) throws IOException {
        PoolingByteOutputStream bytes = new PoolingByteOutputStream(mPool, (int) entity.getContentLength());
        byte[] buffer = null;
        try {
            InputStream in = entity.getContent();
            if (in == null) {
                throw new IOException("zgy error");
            }
            buffer = mPool.getBuf(1024);
            int count;
            while ((count = in.read(buffer)) != -1) {
                bytes.write(buffer, 0, count);
            }
            return bytes.toByteArray();
        } finally {
            try {
                // Close the InputStream and release the resources by "consuming the content".
                entity.consumeContent();
            } catch (IOException e) {
                // This can happen if there was an exception above that left the entity in
                // an invalid state.
            }
            mPool.returnBuf(buffer);
            bytes.close();
        }
    }

    /**
     * Converts Headers[] to Map<String, String>.
     */
    private static Map<String, String> convertHeaders(Header[] headers) {
        Map<String, String> result = new HashMap<String, String>();
        for (int i = 0; i < headers.length; i++) {
            result.put(headers[i].getName(), headers[i].getValue());
        }
        return result;
    }
}