アップデートファイルのURL解析について

アップデートするファイルが、どうしても欲しいが、その、アップデートのアプリをデコンパイルしたところよく分からないので、解読お願いします。

java
1/*
2 * Decompiled with CFR 0.0.
3 * 
4 * Could not load the following classes:
5 *  android.content.Context
6 *  android.os.Build
7 *  android.os.Build$VERSION
8 *  android.telephony.TelephonyManager
9 *  java.io.BufferedInputStream
10 *  java.io.IOException
11 *  java.io.InputStream
12 *  java.lang.Integer
13 *  java.lang.NumberFormatException
14 *  java.lang.Object
15 *  java.lang.String
16 *  java.net.HttpURLConnection
17 *  java.net.SocketTimeoutException
18 *  java.net.URL
19 *  java.net.URLConnection
20 */
21package com.fujitsu.mobile_phone.versionup.networkclient;
22
23import android.content.Context;
24import android.os.Build;
25import android.telephony.TelephonyManager;
26import com.fujitsu.mobile_phone.versionup.FotaServerUrlPreference;
27import com.fujitsu.mobile_phone.versionup.UpdateFileModel;
28import com.fujitsu.mobile_phone.versionup.UpdateFileSizePreference;
29import com.fujitsu.mobile_phone.versionup.VersionManagementModel;
30import com.fujitsu.mobile_phone.versionup.networkclient.CommonNetworkClient;
31import com.fujitsu.mobile_phone.versionup.utility.Utility;
32import java.io.BufferedInputStream;
33import java.io.IOException;
34import java.io.InputStream;
35import java.net.HttpURLConnection;
36import java.net.SocketTimeoutException;
37import java.net.URL;
38import java.net.URLConnection;
39
40public class UpdateFileServerClient
41extends CommonNetworkClient {
42    private static final String TAG = "UpdateFileServerClient";
43    private BufferedInputStream mBufferedInputStream;
44    private InputStream mInputStream;
45    private int mfilelength;
46
47    public int available() throws IOException {
48        return this.mBufferedInputStream.available();
49    }
50
51    public void close() throws IOException {
52        Utility.LogOutput(2, TAG, "close() start");
53        if (this.mBufferedInputStream != null) {
54            this.mBufferedInputStream.close();
55            this.mBufferedInputStream = null;
56        }
57        Utility.LogOutput(2, TAG, "close() end");
58    }
59
60    /*
61     * Enabled aggressive block sorting
62     * Enabled unnecessary exception pruning
63     * Enabled aggressive exception aggregation
64     */
65    @Override
66    public int connection(Context context, String string2) throws IOException, SocketTimeoutException {
67        Utility.LogOutput(2, TAG, "connection() sta");
68        this.mfilelength = 0;
69        this.setHttpConnection((HttpURLConnection)new URL(this.getUrl(context)).openConnection());
70        this.getmHttpConnection().setRequestMethod("GET");
71        this.getmHttpConnection().setUseCaches(false);
72        this.getmHttpConnection().setRequestProperty("User-Agent", this.getUa(context, string2));
73        this.setPram();
74        this.getmHttpConnection().connect();
75        int n = this.getmHttpConnection().getResponseCode();
76        if (n == 200) {
77            this.mfilelength = this.getmHttpConnection().getContentLength();
78        } else if (n == 206) {
79            String[] arrstring = this.getmHttpConnection().getHeaderField("Content-Range").split("[/]");
80            if (arrstring.length > 0) {
81                try {
82                    this.mfilelength = Integer.parseInt((String)arrstring[-1 + arrstring.length]);
83                }
84                catch (NumberFormatException numberFormatException) {
85                    Utility.LogOutput(4, TAG, "NumberFormatException e = " + (Object)numberFormatException);
86                }
87            } else {
88                this.mfilelength = 0;
89                Utility.LogOutput(4, TAG, "mfilelength = 0");
90            }
91        }
92        Utility.LogOutput(3, TAG, "connection() ret = " + n);
93        Utility.LogOutput(3, TAG, "connection() mfilelength = " + this.mfilelength);
94        if (this.mfilelength <= 0) {
95            this.mfilelength = (int)UpdateFileSizePreference.getValue(context);
96        }
97        if (this.mfilelength < 0 && n != 500 && n != 416) {
98            n = -1;
99        }
100        if (n == 200 || n == 206) {
101            this.mBufferedInputStream = new BufferedInputStream(this.getmHttpConnection().getInputStream());
102        }
103        Utility.LogOutput(3, TAG, "ret = " + n);
104        return n;
105    }
106
107    public int downloadFile(byte[] arrby) throws IOException {
108        Utility.LogOutput(2, TAG, "downloadFile() sta");
109        BufferedInputStream bufferedInputStream = this.mBufferedInputStream;
110        int n = 0;
111        if (bufferedInputStream != null) {
112            n = this.mBufferedInputStream.read(arrby);
113        }
114        Utility.LogOutput(2, TAG, "downloadFile() end = " + n);
115        return n;
116    }
117
118    public int getFileSize() {
119        return this.mfilelength;
120    }
121
122    @Override
123    protected String getUa(Context context, String string2) {
124        Utility.LogOutput(2, TAG, "getUa() sta");
125        String string3 = this.getReplaceUa("ImageUpdater (Linux; U; Android OSVERSION; MODEL Build/BUILDID IMEI MODE KITTINGVER)", Build.VERSION.RELEASE, VersionManagementModel.getInstance().getVersion(), ((TelephonyManager)context.getSystemService("phone")).getDeviceId(), string2, this.getKittingVersion(context));
126        Utility.LogOutput(2, TAG, "getUa ret = " + string3);
127        return string3;
128    }
129
130    @Override
131    protected String getUrl(Context context) {
132        Utility.LogOutput(2, TAG, "getUrl() sta");
133        String string2 = this.getReplaceUrl("/fujitsu/c/update/fujitsu/MODEL/update1/ap/dl/");
134        String string3 = FotaServerUrlPreference.getValue(context);
135        if (string3.equals((Object)"DEFAULT")) {
136            string3 = "https://logfota.mobile-biz.jp.fujitsu.com";
137        }
138        String string4 = string3 + string2 + VersionManagementModel.getInstance().getVersion() + "/" + this.getFileName();
139        Utility.LogOutput(2, TAG, "getUrl ret = " + string4);
140        return string4;
141    }
142
143    @Override
144    protected void setPram() {
145        Utility.LogOutput(2, TAG, "setPram()");
146        super.setPram();
147        this.getmHttpConnection().setRequestProperty("Connection", "close");
148        this.getmHttpConnection().setRequestProperty("Accept-Encoding", "identity");
149        long l = new UpdateFileModel().getFileLength();
150        if (l > 0L) {
151            this.getmHttpConnection().addRequestProperty("Accept-Ranges", "bytes");
152            this.getmHttpConnection().addRequestProperty("Range", "bytes=" + l + "-");
153        }
154    }
155
156    public int skip(int n) throws IOException {
157        this.mBufferedInputStream.skip((long)n);
158        return n;
159    }
160}
161
162