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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 
     24 import org.apache.http.HttpVersion;
     25 import org.apache.http.client.HttpClient;
     26 import org.apache.http.conn.params.ConnManagerParams;
     27 import org.apache.http.params.CoreProtocolPNames;
     28 import org.apache.http.params.HttpParams;
     29 
     30 import java.lang.reflect.InvocationTargetException;
     31 import java.lang.reflect.Method;
     32 
     33 /**
     34  * Constructs {@link HttpClient} instances and isolates client code from API
     35  * level differences.
     36  */
     37 public final class HttpClientFactory {
     38     // TODO: migrate GDataClient to use this util method instead of apache's
     39     // DefaultHttpClient.
     40     /**
     41      * Creates an HttpClient with the userAgent string constructed from the
     42      * package name contained in the context.
     43      * @return the client
     44      */
     45     public static HttpClient newHttpClient(Context context) {
     46         return HttpClientFactory.newHttpClient(getUserAgent(context));
     47     }
     48 
     49     /**
     50      * Creates an HttpClient with the specified userAgent string.
     51      * @param userAgent the userAgent string
     52      * @return the client
     53      */
     54     public static HttpClient newHttpClient(String userAgent) {
     55         // AndroidHttpClient is available on all platform releases,
     56         // but is hidden until API Level 8
     57         try {
     58             Class<?> clazz = Class.forName("android.net.http.AndroidHttpClient");
     59             Method newInstance = clazz.getMethod("newInstance", String.class);
     60             Object instance = newInstance.invoke(null, userAgent);
     61 
     62             HttpClient client = (HttpClient) instance;
     63 
     64             // ensure we default to HTTP 1.1
     65             HttpParams params = client.getParams();
     66             params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
     67 
     68             // AndroidHttpClient sets these two parameters thusly by default:
     69             // HttpConnectionParams.setSoTimeout(params, 60 * 1000);
     70             // HttpConnectionParams.setConnectionTimeout(params, 60 * 1000);
     71 
     72             // however it doesn't set this one...
     73             ConnManagerParams.setTimeout(params, 60 * 1000);
     74 
     75             return client;
     76         } catch (InvocationTargetException e) {
     77             throw new RuntimeException(e);
     78         } catch (ClassNotFoundException e) {
     79             throw new RuntimeException(e);
     80         } catch (NoSuchMethodException e) {
     81             throw new RuntimeException(e);
     82         } catch (IllegalAccessException e) {
     83             throw new RuntimeException(e);
     84         }
     85     }
     86 
     87     /**
     88      * Closes an HttpClient.
     89      */
     90     public static void close(HttpClient client) {
     91         // AndroidHttpClient is available on all platform releases,
     92         // but is hidden until API Level 8
     93         try {
     94             Class<?> clazz = client.getClass();
     95             Method method = clazz.getMethod("close", (Class<?>[]) null);
     96             method.invoke(client, (Object[]) null);
     97         } catch (InvocationTargetException e) {
     98             throw new RuntimeException(e);
     99         } catch (NoSuchMethodException e) {
    100             throw new RuntimeException(e);
    101         } catch (IllegalAccessException e) {
    102             throw new RuntimeException(e);
    103         }
    104     }
    105 
    106     private static String sUserAgent = null;
    107 
    108     private static String getUserAgent(Context context) {
    109         if (sUserAgent == null) {
    110             PackageInfo pi;
    111             try {
    112                 pi = context.getPackageManager().getPackageInfo(
    113                         context.getPackageName(), 0);
    114             } catch (NameNotFoundException e) {
    115                 throw new IllegalStateException("getPackageInfo failed");
    116             }
    117             sUserAgent = String.format("%s/%s; %s/%s/%s/%s; %s/%s/%s",
    118                     pi.packageName,
    119                     pi.versionName,
    120                     Build.BRAND,
    121                     Build.DEVICE,
    122                     Build.MODEL,
    123                     Build.ID,
    124                     Build.VERSION.SDK_INT,
    125                     Build.VERSION.RELEASE,
    126                     Build.VERSION.INCREMENTAL);
    127         }
    128         return sUserAgent;
    129     }
    130 
    131     private HttpClientFactory() {
    132     }
    133 }
    134