Android Open Source - liquid-sdk-android L Q Network Request

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License

The source code is released under:

Apache License

Java Source Code

/**
 * Copyright 2014-present Liquid Data Intelligence S.A.
 *//from w w  w. j a  v  a2 s  .  co  m
 * 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 io.lqd.sdk.model;

import io.lqd.sdk.LQLog;
import io.lqd.sdk.Liquid;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Date;
import java.util.Locale;
import java.util.zip.GZIPInputStream;

import org.apache.http.entity.StringEntity;

import android.content.Context;
import android.os.Build;

public class LQNetworkRequest extends LQModel {

    public static final int HALF_HOUR = 30 * 60 * 1000;

    private static final long serialVersionUID = 7456534930025458866L;

    private static final String LOCAL = Locale.getDefault().toString();
    private static final String DEVICE = Build.MANUFACTURER + " " + Build.MODEL;

    private static final String USER_AGENT = "Liquid/"+ Liquid.LIQUID_VERSION + " (Android; Android " + Build.VERSION.RELEASE + "; " + LOCAL + "; " + DEVICE +")";
    private String mUrl;
    private String mHttpMethod;
    private String mJson;
    private int mNumberOfTries;
    private Date mLastTry;

    public LQNetworkRequest(String url, String httpMethod, String json){
        mUrl = url;
        mHttpMethod = httpMethod;
        mJson = json;
        mNumberOfTries = 0;
        mLastTry = null;
    }

    public String getUrl() {
        return mUrl;
    }
    public String getHttpMethod() {
        return mHttpMethod;
    }
    public String getJSON(){
        return mJson;
    }
    public int getNumberOfTries() {
        return mNumberOfTries;
    }

    public void incrementNumberOfTries() {
        mNumberOfTries++;
    }

    public void setLastTry(Date lastTry) {
        mLastTry = lastTry;
    }

    public Date getLastTry() {
        return mLastTry;
    }

    public boolean willFlushAndSet(Date now) {
        boolean willflush = canFlush(now);
        if(!willflush) {
            mLastTry = now;
        }
        return willflush;
    }

    public boolean canFlush(Date now) {
        return mLastTry == null ||  now.getTime() - mLastTry.getTime() >= HALF_HOUR;
    }

    @Override
    public boolean equals(Object o) {
        return (o instanceof LQNetworkRequest) &&
                ((LQNetworkRequest)o).getHttpMethod().equals(this.getHttpMethod()) &&
                ((LQNetworkRequest)o).getUrl().equals(this.getUrl()) &&
                ((LQNetworkRequest)o).getJSON().equals(this.getJSON());
    }

    // File Management
    @SuppressWarnings("unchecked")
    public static ArrayList<LQNetworkRequest> loadQueue(Context context, String fileName) {
        Object result = LQModel.loadObject(context, fileName + ".queue");
        ArrayList<LQNetworkRequest> queue = (ArrayList<LQNetworkRequest>) result;
        if (queue == null) {
            queue = new ArrayList<LQNetworkRequest>();
        }
        LQLog.infoVerbose("Loading queue with " + queue.size() + " items from disk");
        return queue;
    }

    public static void saveQueue(Context context, ArrayList<LQNetworkRequest> queue, String fileName) {
        LQLog.data("Saving queue with " + queue.size() + " items to disk");
        LQModel.save(context, fileName + ".queue", queue);
    }

    public LQNetworkResponse sendRequest(String token) {
        String response = null;
        int responseCode = -1;
        InputStream err = null;
        OutputStream out = null;
        BufferedOutputStream bout = null;
        BufferedReader boin = null;
        HttpURLConnection connection = null;
        try {
            URL url = new URL(this.getUrl());
            connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod(this.getHttpMethod());
            connection.setRequestProperty("Authorization", "Token " + token);
            connection.setRequestProperty("User-Agent", USER_AGENT);
            connection.setRequestProperty("Accept", "application/vnd.lqd.v1+json");
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setRequestProperty("Accept-Encoding", "gzip");
            connection.setDoInput(true);
            if (this.getJSON() != null) {
                connection.setDoOutput(true);
                out = connection.getOutputStream();
                bout = new BufferedOutputStream(out);
                final StringEntity stringEntity = new StringEntity(this.getJSON(), "UTF-8");
                stringEntity.writeTo(bout);
            }
            responseCode = connection.getResponseCode();
            err = connection.getErrorStream();
            boin = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            response = boin.readLine();
        } catch (IOException e) {
            LQLog.http("Failed due to " + e + " responseCode " + responseCode);
            LQLog.http("Error " + inputStreamToString(err));
        } finally {
            if(connection != null)
                connection.disconnect();
            try {
                if(out != null)
                    out.close();
            } catch (IOException e) {}
            try {
                if(err != null)
                    err.close();
            } catch (IOException e) {}
            try {
                if(bout != null)
                    bout.close();
            } catch (IOException e) {}
            try {
                if (boin != null)
                    boin.close();
            } catch (IOException e) {}
        }
        if ((response != null) || ((responseCode >= 200) && (responseCode < 300))) {
            LQLog.http("HTTP Success " + response);
            return new LQNetworkResponse(responseCode, response);
        }
        return new LQNetworkResponse(responseCode);
    }

    private static String inputStreamToString(final InputStream stream) {
        if(stream == null) {
            return "";
        }
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    new GZIPInputStream(stream)));
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = br.readLine()) != null) {
                sb.append(line + "\n");
            }
            br.close();
            return sb.toString();
        } catch (IOException e) {
            return "";
        }
    }
}

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