conversations-classic/src/main/java/eu/siacs/conversations/http/HttpConnection.java

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package eu.siacs.conversations.http;
import android.content.Intent;
import android.net.Uri;
import android.os.SystemClock;
import android.util.Log;
import org.apache.http.conn.ssl.StrictHostnameVerifier;
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import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
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import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
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import java.util.Arrays;
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import javax.net.ssl.HostnameVerifier;
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import javax.net.ssl.HttpsURLConnection;
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import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLHandshakeException;
import javax.net.ssl.SSLSocketFactory;
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import javax.net.ssl.X509TrustManager;
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import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
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import eu.siacs.conversations.entities.Downloadable;
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import eu.siacs.conversations.entities.DownloadableFile;
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import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.utils.CryptoHelper;
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public class HttpConnection implements Downloadable {
private HttpConnectionManager mHttpConnectionManager;
private XmppConnectionService mXmppConnectionService;
private URL mUrl;
private Message message;
private DownloadableFile file;
private int mStatus = Downloadable.STATUS_UNKNOWN;
private boolean acceptedAutomatically = false;
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private int mProgress = 0;
private long mLastGuiRefresh = 0;
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public HttpConnection(HttpConnectionManager manager) {
this.mHttpConnectionManager = manager;
this.mXmppConnectionService = manager.getXmppConnectionService();
}
@Override
public boolean start() {
if (mXmppConnectionService.hasInternetConnection()) {
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if (this.mStatus == STATUS_OFFER_CHECK_FILESIZE) {
checkFileSize(true);
} else {
new Thread(new FileDownloader(true)).start();
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}
return true;
} else {
return false;
}
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}
public void init(Message message) {
init(message,false);
}
public void init(Message message, boolean interactive) {
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this.message = message;
this.message.setDownloadable(this);
try {
mUrl = new URL(message.getBody());
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String[] parts = mUrl.getPath().toLowerCase().split("\\.");
String lastPart = parts.length >= 1 ? parts[parts.length - 1] : null;
String secondToLast = parts.length >= 2 ? parts[parts.length -2] : null;
if ("pgp".equals(lastPart) || "gpg".equals(lastPart)) {
this.message.setEncryption(Message.ENCRYPTION_PGP);
} else if (message.getEncryption() != Message.ENCRYPTION_OTR) {
this.message.setEncryption(Message.ENCRYPTION_NONE);
}
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String extension;
if (Arrays.asList(VALID_CRYPTO_EXTENSIONS).contains(lastPart)) {
extension = secondToLast;
} else {
extension = lastPart;
}
message.setRelativeFilePath(message.getUuid()+"."+extension);
this.file = mXmppConnectionService.getFileBackend().getFile(message, false);
String reference = mUrl.getRef();
if (reference != null && reference.length() == 96) {
this.file.setKey(CryptoHelper.hexToBytes(reference));
}
if (this.message.getEncryption() == Message.ENCRYPTION_OTR
&& this.file.getKey() == null) {
this.message.setEncryption(Message.ENCRYPTION_NONE);
}
checkFileSize(true);
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} catch (MalformedURLException e) {
this.cancel();
}
}
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private void checkFileSize(boolean interactive) {
new Thread(new FileSizeChecker(interactive)).start();
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}
public void cancel() {
mHttpConnectionManager.finishConnection(this);
message.setDownloadable(null);
mXmppConnectionService.updateConversationUi();
}
private void finish() {
Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(Uri.fromFile(file));
mXmppConnectionService.sendBroadcast(intent);
message.setDownloadable(null);
mHttpConnectionManager.finishConnection(this);
mXmppConnectionService.updateConversationUi();
if (acceptedAutomatically) {
mXmppConnectionService.getNotificationService().push(message);
}
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}
private void changeStatus(int status) {
this.mStatus = status;
mXmppConnectionService.updateConversationUi();
}
private void setupTrustManager(final HttpsURLConnection connection,
final boolean interactive) {
final X509TrustManager trustManager;
final HostnameVerifier hostnameVerifier;
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if (interactive) {
trustManager = mXmppConnectionService.getMemorizingTrustManager();
hostnameVerifier = mXmppConnectionService
.getMemorizingTrustManager().wrapHostnameVerifier(
new StrictHostnameVerifier());
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} else {
trustManager = mXmppConnectionService.getMemorizingTrustManager()
.getNonInteractive();
hostnameVerifier = mXmppConnectionService
.getMemorizingTrustManager()
.wrapHostnameVerifierNonInteractive(
new StrictHostnameVerifier());
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}
try {
final SSLContext sc = SSLContext.getInstance("TLS");
sc.init(null, new X509TrustManager[]{trustManager},
mXmppConnectionService.getRNG());
final SSLSocketFactory sf = sc.getSocketFactory();
final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
sf.getSupportedCipherSuites());
if (cipherSuites.length > 0) {
sc.getDefaultSSLParameters().setCipherSuites(cipherSuites);
}
connection.setSSLSocketFactory(sf);
connection.setHostnameVerifier(hostnameVerifier);
} catch (final KeyManagementException | NoSuchAlgorithmException ignored) {
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}
}
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private class FileSizeChecker implements Runnable {
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private boolean interactive = false;
public FileSizeChecker(boolean interactive) {
this.interactive = interactive;
}
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@Override
public void run() {
long size;
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try {
size = retrieveFileSize();
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} catch (SSLHandshakeException e) {
changeStatus(STATUS_OFFER_CHECK_FILESIZE);
HttpConnection.this.acceptedAutomatically = false;
HttpConnection.this.mXmppConnectionService.getNotificationService().push(message);
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return;
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} catch (IOException e) {
Log.d(Config.LOGTAG, "io exception in http file size checker: " + e.getMessage());
if (interactive) {
mXmppConnectionService.showErrorToastInUi(R.string.file_not_found_on_remote_host);
}
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cancel();
return;
}
file.setExpectedSize(size);
if (size <= mHttpConnectionManager.getAutoAcceptFileSize()) {
HttpConnection.this.acceptedAutomatically = true;
new Thread(new FileDownloader(interactive)).start();
} else {
changeStatus(STATUS_OFFER);
HttpConnection.this.acceptedAutomatically = false;
HttpConnection.this.mXmppConnectionService.getNotificationService().push(message);
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}
}
private long retrieveFileSize() throws IOException {
Log.d(Config.LOGTAG,"retrieve file size. interactive:"+String.valueOf(interactive));
changeStatus(STATUS_CHECKING);
HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
connection.setRequestMethod("HEAD");
if (connection instanceof HttpsURLConnection) {
setupTrustManager((HttpsURLConnection) connection, interactive);
}
connection.connect();
String contentLength = connection.getHeaderField("Content-Length");
if (contentLength == null) {
throw new IOException();
}
try {
return Long.parseLong(contentLength, 10);
} catch (NumberFormatException e) {
throw new IOException();
}
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}
}
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private class FileDownloader implements Runnable {
private boolean interactive = false;
public FileDownloader(boolean interactive) {
this.interactive = interactive;
}
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@Override
public void run() {
try {
changeStatus(STATUS_DOWNLOADING);
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download();
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updateImageBounds();
finish();
} catch (SSLHandshakeException e) {
changeStatus(STATUS_OFFER);
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} catch (IOException e) {
mXmppConnectionService.showErrorToastInUi(R.string.file_not_found_on_remote_host);
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cancel();
}
}
private void download() throws SSLHandshakeException, IOException {
HttpURLConnection connection = (HttpURLConnection) mUrl.openConnection();
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if (connection instanceof HttpsURLConnection) {
setupTrustManager((HttpsURLConnection) connection, interactive);
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}
connection.connect();
BufferedInputStream is = new BufferedInputStream(connection.getInputStream());
file.getParentFile().mkdirs();
file.createNewFile();
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OutputStream os = file.createOutputStream();
if (os == null) {
throw new IOException();
}
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long transmitted = 0;
long expected = file.getExpectedSize();
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int count = -1;
byte[] buffer = new byte[1024];
while ((count = is.read(buffer)) != -1) {
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transmitted += count;
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os.write(buffer, 0, count);
updateProgress((int) ((((double) transmitted) / expected) * 100));
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}
os.flush();
os.close();
is.close();
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}
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private void updateImageBounds() {
message.setType(Message.TYPE_FILE);
mXmppConnectionService.getFileBackend().updateFileParams(message, mUrl);
mXmppConnectionService.updateMessage(message);
}
}
public void updateProgress(int i) {
this.mProgress = i;
if (SystemClock.elapsedRealtime() - this.mLastGuiRefresh > Config.PROGRESS_UI_UPDATE_INTERVAL) {
this.mLastGuiRefresh = SystemClock.elapsedRealtime();
mXmppConnectionService.updateConversationUi();
}
}
@Override
public int getStatus() {
return this.mStatus;
}
@Override
public long getFileSize() {
if (this.file != null) {
return this.file.getExpectedSize();
} else {
return 0;
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}
}
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@Override
public int getProgress() {
return this.mProgress;
}
}