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Code Issues Releases Wiki Activity

Gzip backup

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M66B 2024-06-02 16:44:21 +02:00
parent 8bf87e6331
commit e5372b5707
1 changed files with 23 additions and 1 deletions
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24
app/src/main/java/eu/faircode/email/FairEmailBackupAgent.java
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@ -34,6 +34,8 @@ import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
@ -42,11 +44,15 @@ import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Objects;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
public class FairEmailBackupAgent extends BackupAgent {
// https://developer.android.com/identity/data/keyvaluebackup#BackupAgent
// https://developer.android.com/identity/data/testingbackup#Preparing
// bmgr backupnow "eu.faircode.email.debug"
private static final String KEY_JSON = "eu.faircode.email.json";
@Override
@ -117,8 +123,15 @@ public class FairEmailBackupAgent extends BackupAgent {
}
boolean write = !Objects.equals(dataHash, lastHash);
EntityLog.log(this, "Backup write=" + write);
EntityLog.log(this, "Backup write=" + write + "size=" + dataBuf.length);
if (write) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try (GZIPOutputStream gos = new GZIPOutputStream(bos)) {
gos.write(dataBuf, 0, dataBuf.length);
}
dataBuf = bos.toByteArray();
EntityLog.log(this, "Backup compressed=" + dataBuf.length);
data.writeEntityHeader(KEY_JSON, dataBuf.length);
data.writeEntityData(dataBuf, dataBuf.length);
}
@ -153,8 +166,17 @@ public class FairEmailBackupAgent extends BackupAgent {
if (KEY_JSON.equals(dataKey)) {
byte[] dataBuf = new byte[dataSize];
data.readEntityData(dataBuf, 0, dataSize);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try (GZIPInputStream gis = new GZIPInputStream(new ByteArrayInputStream(dataBuf))) {
Helper.copy(gis, bos);
}
dataBuf = bos.toByteArray();
EntityLog.log(this, "Restore decompressed=" + dataBuf.length);
try {
JSONObject jroot = new JSONObject(new String(dataBuf, StandardCharsets.UTF_8));
jroot.put("version", 1);
JSONObject jsettings = jroot.getJSONObject("settings");
SharedPreferences.Editor editor = prefs.edit();