370 lines
13 KiB
Java
370 lines
13 KiB
Java
package com.neatstudio.tmuxandroid;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.content.ActivityNotFoundException;
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import android.content.Intent;
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import android.content.SharedPreferences;
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import android.net.Uri;
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import android.os.Build;
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import android.provider.Settings;
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import android.widget.Toast;
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import org.json.JSONArray;
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import org.json.JSONObject;
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import java.io.BufferedInputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.security.MessageDigest;
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import java.util.Locale;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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final class UpdateManager {
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private static final String PREF_PENDING_INSTALL_APK = "pending_install_apk";
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interface Callback {
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void onChecking(boolean checking);
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void onMessage(String message);
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}
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private interface ReleaseUrlPicker {
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String pick(ReleaseInfo info);
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}
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private final Activity activity;
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private final SharedPreferences prefs;
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private final Callback callback;
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private final ExecutorService executor = Executors.newSingleThreadExecutor();
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private volatile boolean checkInProgress;
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private volatile boolean downloadInProgress;
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private File pendingInstallApk;
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UpdateManager(Activity activity, SharedPreferences prefs, Callback callback) {
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this.activity = activity;
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this.prefs = prefs;
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this.callback = callback;
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}
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void check(boolean userInitiated) {
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if (checkInProgress) {
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postMessage("Update check already running");
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return;
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}
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String manifestUrl = getUpdateManifestUrl();
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checkInProgress = true;
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callback.onChecking(true);
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postMessage("Checking update from " + hostLabel(manifestUrl) + "...");
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executor.execute(() -> {
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try {
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ReleaseInfo info = fetchReleaseInfo(manifestUrl);
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if (info.versionCode <= BuildConfig.VERSION_CODE) {
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postMessage("Already up to date: " + BuildConfig.VERSION_NAME);
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return;
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}
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postMessage("Update found: " + info.versionName);
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activity.runOnUiThread(() -> showUpdateDialog(info));
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} catch (Exception error) {
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postMessage(userInitiated ? "Update check failed: " + error.getMessage() : null);
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} finally {
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checkInProgress = false;
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activity.runOnUiThread(() -> callback.onChecking(false));
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}
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});
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}
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void openApkDownload() {
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openSelectedReleaseUrl("APK", info -> info.apkUrl);
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}
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void openReleasePage() {
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openSelectedReleaseUrl("Release page", info -> info.releasePageUrl);
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}
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private void openSelectedReleaseUrl(String label, ReleaseUrlPicker picker) {
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if (checkInProgress) {
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postMessage("Update check already running");
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return;
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}
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String manifestUrl = getUpdateManifestUrl();
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checkInProgress = true;
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callback.onChecking(true);
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postMessage("Resolving " + label + " from " + hostLabel(manifestUrl) + "...");
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executor.execute(() -> {
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try {
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ReleaseInfo info = fetchReleaseInfo(manifestUrl);
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String url = picker.pick(info);
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if (url == null || url.trim().isEmpty()) {
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throw new IllegalStateException(label + " URL is missing");
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}
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activity.runOnUiThread(() -> openExternalUrl(url.trim(), label));
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} catch (Exception error) {
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postMessage(label + " failed: " + error.getMessage());
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} finally {
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checkInProgress = false;
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activity.runOnUiThread(() -> callback.onChecking(false));
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}
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});
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}
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private String getUpdateManifestUrl() {
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String url = prefs.getString("update_url", BuildConfig.DEFAULT_UPDATE_URL);
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if (url == null || url.trim().isEmpty()) {
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return BuildConfig.DEFAULT_UPDATE_URL;
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}
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return url.trim();
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}
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private String hostLabel(String url) {
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try {
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return new URL(url).getHost();
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} catch (Exception ignored) {
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return url;
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}
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}
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private ReleaseInfo fetchReleaseInfo(String manifestUrl) throws Exception {
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String json = readText(manifestUrl);
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JSONObject root = new JSONObject(json);
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if (root.has("assets") && root.has("tag_name")) {
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return fetchReleaseInfoFromReleaseApi(root);
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}
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return new ReleaseInfo(
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root.getInt("versionCode"),
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root.optString("versionName", ""),
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root.getString("apkUrl"),
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root.optString("sha256", ""),
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root.optString("releasePageUrl", "")
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);
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}
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private ReleaseInfo fetchReleaseInfoFromReleaseApi(JSONObject release) throws Exception {
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JSONArray assets = release.getJSONArray("assets");
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String manifestUrl = findAssetUrl(assets, "latest.json");
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String apkUrl = findAssetUrl(assets, "tmux-android.apk");
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if (manifestUrl.isEmpty()) {
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throw new IllegalStateException("Release has no latest.json");
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}
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ReleaseInfo info = fetchReleaseInfo(manifestUrl);
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if (apkUrl.isEmpty()) {
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return info;
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}
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return new ReleaseInfo(
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info.versionCode,
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info.versionName,
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apkUrl,
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info.sha256,
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release.optString("html_url", info.releasePageUrl)
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);
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}
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private String findAssetUrl(JSONArray assets, String name) {
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for (int index = 0; index < assets.length(); index++) {
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JSONObject asset = assets.optJSONObject(index);
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if (asset == null || !name.equals(asset.optString("name"))) {
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continue;
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}
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String url = asset.optString("browser_download_url", "");
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if (!url.isEmpty()) {
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return url;
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}
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}
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return "";
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}
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private String readText(String url) throws Exception {
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HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
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connection.setConnectTimeout(12000);
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connection.setReadTimeout(12000);
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connection.setRequestProperty("Accept", "application/json");
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try (InputStream input = new BufferedInputStream(connection.getInputStream())) {
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byte[] bytes = readAllBytes(input);
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return new String(bytes, java.nio.charset.StandardCharsets.UTF_8);
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} finally {
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connection.disconnect();
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}
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}
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private void showUpdateDialog(ReleaseInfo info) {
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new AlertDialog.Builder(activity)
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.setTitle("Update available")
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.setMessage("Install " + info.versionName + " now?")
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.setNegativeButton("Later", null)
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.setPositiveButton("Install", (dialog, which) -> downloadAndInstall(info))
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.show();
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}
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private void downloadAndInstall(ReleaseInfo info) {
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if (downloadInProgress) {
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postMessage("Update download already running");
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return;
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}
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downloadInProgress = true;
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callback.onChecking(true);
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postMessage("Preparing " + info.versionName + "...");
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executor.execute(() -> {
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try {
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File apk = downloadApk(info);
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if (!info.sha256.isEmpty()) {
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postMessage("Verifying APK...");
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String actual = sha256(apk);
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if (!actual.equalsIgnoreCase(info.sha256)) {
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throw new IllegalStateException("APK SHA-256 mismatch");
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}
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}
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activity.runOnUiThread(() -> installApk(apk));
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} catch (Exception error) {
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postMessage("Update download failed: " + error.getMessage());
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} finally {
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downloadInProgress = false;
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activity.runOnUiThread(() -> callback.onChecking(false));
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}
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});
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}
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private File downloadApk(ReleaseInfo info) throws Exception {
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File dir = new File(activity.getCacheDir(), "updates");
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if (!dir.exists() && !dir.mkdirs()) {
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throw new IllegalStateException("Cannot create update cache");
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}
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File apk = new File(dir, "tmux-android-" + info.versionCode + ".apk");
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if (isCachedApkValid(apk, info)) {
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postMessage("Using downloaded APK");
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return apk;
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}
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postMessage("Downloading " + info.versionName + "...");
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HttpURLConnection connection = (HttpURLConnection) new URL(info.apkUrl).openConnection();
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connection.setConnectTimeout(12000);
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connection.setReadTimeout(60000);
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try (InputStream input = new BufferedInputStream(connection.getInputStream());
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FileOutputStream output = new FileOutputStream(apk)) {
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byte[] buffer = new byte[64 * 1024];
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int read;
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while ((read = input.read(buffer)) != -1) {
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output.write(buffer, 0, read);
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}
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} finally {
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connection.disconnect();
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}
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return apk;
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}
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private boolean isCachedApkValid(File apk, ReleaseInfo info) throws Exception {
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if (!apk.exists() || apk.length() <= 0) {
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return false;
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}
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if (info.sha256.isEmpty()) {
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return true;
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}
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return sha256(apk).equalsIgnoreCase(info.sha256);
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}
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private void installApk(File apk) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
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&& !activity.getPackageManager().canRequestPackageInstalls()) {
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pendingInstallApk = apk;
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prefs.edit().putString(PREF_PENDING_INSTALL_APK, apk.getAbsolutePath()).apply();
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Intent settingsIntent = new Intent(
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Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES,
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Uri.parse("package:" + activity.getPackageName())
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);
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activity.startActivity(settingsIntent);
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Toast.makeText(activity, "Allow installs, then return to continue", Toast.LENGTH_LONG).show();
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postMessage("Install permission required");
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return;
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}
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pendingInstallApk = null;
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prefs.edit().remove(PREF_PENDING_INSTALL_APK).apply();
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Uri apkUri = UpdateFileProvider.getUriForFile(
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activity,
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activity.getPackageName() + ".fileprovider",
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apk
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);
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Intent intent = new Intent(Intent.ACTION_VIEW)
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.setDataAndType(apkUri, "application/vnd.android.package-archive")
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.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
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.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
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try {
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activity.startActivity(intent);
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postMessage("Opened Android package installer");
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} catch (ActivityNotFoundException error) {
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postMessage("No package installer found");
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}
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}
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private void openExternalUrl(String url, String label) {
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try {
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activity.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
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postMessage("Opened " + label);
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} catch (ActivityNotFoundException error) {
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postMessage("No app can open " + label);
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}
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}
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void resumePendingInstall() {
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File apk = pendingInstallApk;
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if (apk == null) {
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String path = prefs.getString(PREF_PENDING_INSTALL_APK, "");
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if (path != null && !path.isEmpty()) {
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apk = new File(path);
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pendingInstallApk = apk;
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}
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}
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if (apk == null) {
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return;
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}
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if (!apk.exists() || apk.length() <= 0) {
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pendingInstallApk = null;
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prefs.edit().remove(PREF_PENDING_INSTALL_APK).apply();
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postMessage("Downloaded APK is no longer available");
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return;
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}
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
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&& !activity.getPackageManager().canRequestPackageInstalls()) {
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return;
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}
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postMessage("Continuing APK install...");
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installApk(apk);
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}
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private static byte[] readAllBytes(InputStream input) throws Exception {
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java.io.ByteArrayOutputStream output = new java.io.ByteArrayOutputStream();
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byte[] buffer = new byte[16 * 1024];
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int read;
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while ((read = input.read(buffer)) != -1) {
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output.write(buffer, 0, read);
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}
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return output.toByteArray();
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}
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private static String sha256(File file) throws Exception {
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MessageDigest digest = MessageDigest.getInstance("SHA-256");
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try (InputStream input = new BufferedInputStream(new java.io.FileInputStream(file))) {
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byte[] buffer = new byte[64 * 1024];
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int read;
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while ((read = input.read(buffer)) != -1) {
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digest.update(buffer, 0, read);
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}
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}
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byte[] bytes = digest.digest();
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StringBuilder builder = new StringBuilder(bytes.length * 2);
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for (byte item : bytes) {
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builder.append(String.format(Locale.US, "%02x", item));
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}
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return builder.toString();
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}
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private void postMessage(String message) {
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if (message == null) {
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return;
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}
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activity.runOnUiThread(() -> callback.onMessage(message));
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}
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}
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