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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.gallery3d.common;
     18 
     19 import android.content.Context;
     20 import android.content.pm.PackageInfo;
     21 import android.content.pm.PackageManager.NameNotFoundException;
     22 import android.os.Build;
     23 import android.util.Log;
     24 
     25 import org.apache.http.HttpVersion;
     26 import org.apache.http.client.HttpClient;
     27 import org.apache.http.conn.params.ConnManagerParams;
     28 import org.apache.http.params.CoreProtocolPNames;
     29 import org.apache.http.params.HttpParams;
     30 
     31 import java.lang.reflect.InvocationTargetException;
     32 import java.lang.reflect.Method;
     33 
     34 /**
     35  * Constructs {@link HttpClient} instances and isolates client code from API
     36  * level differences.
     37  */
     38 public final class HttpClientFactory {
     39     // TODO: migrate GDataClient to use this util method instead of apache's
     40     // DefaultHttpClient.
     41     /**
     42      * Creates an HttpClient with the userAgent string constructed from the
     43      * package name contained in the context.
     44      * @return the client
     45      */
     46     public static HttpClient newHttpClient(Context context) {
     47         return HttpClientFactory.newHttpClient(getUserAgent(context));
     48     }
     49 
     50     /**
     51      * Creates an HttpClient with the specified userAgent string.
     52      * @param userAgent the userAgent string
     53      * @return the client
     54      */
     55     public static HttpClient newHttpClient(String userAgent) {
     56         // AndroidHttpClient is available on all platform releases,
     57         // but is hidden until API Level 8
     58         try {
     59             Class<?> clazz = Class.forName("android.net.http.AndroidHttpClient");
     60             Method newInstance = clazz.getMethod("newInstance", String.class);
     61             Object instance = newInstance.invoke(null, userAgent);
     62 
     63             HttpClient client = (HttpClient) instance;
     64 
     65             // ensure we default to HTTP 1.1
     66             HttpParams params = client.getParams();
     67             params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
     68 
     69             // AndroidHttpClient sets these two parameters thusly by default:
     70             // HttpConnectionParams.setSoTimeout(params, 60 * 1000);
     71             // HttpConnectionParams.setConnectionTimeout(params, 60 * 1000);
     72 
     73             // however it doesn't set this one...
     74             ConnManagerParams.setTimeout(params, 60 * 1000);
     75 
     76             return client;
     77         } catch (InvocationTargetException e) {
     78             throw new RuntimeException(e);
     79         } catch (ClassNotFoundException e) {
     80             throw new RuntimeException(e);
     81         } catch (NoSuchMethodException e) {
     82             throw new RuntimeException(e);
     83         } catch (IllegalAccessException e) {
     84             throw new RuntimeException(e);
     85         }
     86     }
     87 
     88     /**
     89      * Closes an HttpClient.
     90      */
     91     public static void close(HttpClient client) {
     92         // AndroidHttpClient is available on all platform releases,
     93         // but is hidden until API Level 8
     94         try {
     95             Class<?> clazz = client.getClass();
     96             Method method = clazz.getMethod("close", (Class<?>[]) null);
     97             method.invoke(client, (Object[]) null);
     98         } catch (InvocationTargetException e) {
     99             throw new RuntimeException(e);
    100         } catch (NoSuchMethodException e) {
    101             throw new RuntimeException(e);
    102         } catch (IllegalAccessException e) {
    103             throw new RuntimeException(e);
    104         }
    105     }
    106 
    107     private static String sUserAgent = null;
    108 
    109     private static String getUserAgent(Context context) {
    110         if (sUserAgent == null) {
    111             PackageInfo pi;
    112             try {
    113                 pi = context.getPackageManager().getPackageInfo(
    114                         context.getPackageName(), 0);
    115             } catch (NameNotFoundException e) {
    116                 throw new IllegalStateException("getPackageInfo failed");
    117             }
    118             sUserAgent = String.format("%s/%s; %s/%s/%s/%s; %s/%s/%s",
    119                     pi.packageName,
    120                     pi.versionName,
    121                     Build.BRAND,
    122                     Build.DEVICE,
    123                     Build.MODEL,
    124                     Build.ID,
    125                     Build.VERSION.SDK,
    126                     Build.VERSION.RELEASE,
    127                     Build.VERSION.INCREMENTAL);
    128         }
    129         return sUserAgent;
    130     }
    131 
    132     private HttpClientFactory() {
    133     }
    134 }
    135