Initial native Android tmux client
This commit is contained in:
Codex
@@ -0,0 +1,307 @@
|
||||
package com.neatstudio.tmuxandroid;
|
||||
|
||||
import android.util.Base64;
|
||||
|
||||
import org.json.JSONObject;
|
||||
|
||||
import java.io.BufferedInputStream;
|
||||
import java.io.BufferedOutputStream;
|
||||
import java.net.Socket;
|
||||
import java.net.URI;
|
||||
import java.nio.charset.StandardCharsets;
|
||||
import java.security.MessageDigest;
|
||||
import java.security.SecureRandom;
|
||||
import java.util.Arrays;
|
||||
|
||||
import javax.net.ssl.SSLSocketFactory;
|
||||
|
||||
final class TerminalSocketClient {
|
||||
interface Listener {
|
||||
void onConnected();
|
||||
void onOutput(String data);
|
||||
void onError(String message);
|
||||
void onClosed();
|
||||
}
|
||||
|
||||
private final Object writeLock = new Object();
|
||||
private final Listener listener;
|
||||
private Socket socket;
|
||||
private BufferedInputStream input;
|
||||
private BufferedOutputStream output;
|
||||
private volatile boolean closed;
|
||||
private Thread thread;
|
||||
|
||||
TerminalSocketClient(Listener listener) {
|
||||
this.listener = listener;
|
||||
}
|
||||
|
||||
void connect(String baseUrl, String sessionName, int cols, int rows) {
|
||||
closed = false;
|
||||
thread = new Thread(() -> run(baseUrl, sessionName, cols, rows), "terminal-ws");
|
||||
thread.start();
|
||||
}
|
||||
|
||||
void sendInput(String data) {
|
||||
sendMessage("input", "data", data);
|
||||
}
|
||||
|
||||
void resize(int cols, int rows) {
|
||||
sendMessage("resize", "cols", cols, "rows", rows);
|
||||
}
|
||||
|
||||
void scroll(int lines) {
|
||||
sendMessage("scroll", "lines", lines);
|
||||
}
|
||||
|
||||
void clearHistory() {
|
||||
sendMessage("clear-history");
|
||||
}
|
||||
|
||||
void close() {
|
||||
closed = true;
|
||||
try {
|
||||
sendFrame(8, new byte[0]);
|
||||
} catch (Exception ignored) {
|
||||
}
|
||||
try {
|
||||
if (socket != null) {
|
||||
socket.close();
|
||||
}
|
||||
} catch (Exception ignored) {
|
||||
}
|
||||
}
|
||||
|
||||
private void run(String baseUrl, String sessionName, int cols, int rows) {
|
||||
try {
|
||||
URI uri = buildWsUri(baseUrl);
|
||||
socket = openSocket(uri);
|
||||
input = new BufferedInputStream(socket.getInputStream());
|
||||
output = new BufferedOutputStream(socket.getOutputStream());
|
||||
handshake(uri);
|
||||
listener.onConnected();
|
||||
sendMessage(
|
||||
"attach",
|
||||
"tabId", "android-" + System.currentTimeMillis(),
|
||||
"sessionName", sessionName,
|
||||
"cols", cols,
|
||||
"rows", rows
|
||||
);
|
||||
readLoop();
|
||||
} catch (Exception error) {
|
||||
if (!closed) {
|
||||
listener.onError(error.getMessage() == null ? error.toString() : error.getMessage());
|
||||
}
|
||||
} finally {
|
||||
closed = true;
|
||||
listener.onClosed();
|
||||
try {
|
||||
if (socket != null) {
|
||||
socket.close();
|
||||
}
|
||||
} catch (Exception ignored) {
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private URI buildWsUri(String baseUrl) throws Exception {
|
||||
URI base = new URI(baseUrl);
|
||||
String scheme = "https".equalsIgnoreCase(base.getScheme()) ? "wss" : "ws";
|
||||
int port = base.getPort();
|
||||
String authority = port == -1 ? base.getHost() : base.getHost() + ":" + port;
|
||||
return new URI(scheme + "://" + authority + "/ws/terminal");
|
||||
}
|
||||
|
||||
private Socket openSocket(URI uri) throws Exception {
|
||||
int port = uri.getPort();
|
||||
if (port == -1) {
|
||||
port = "wss".equalsIgnoreCase(uri.getScheme()) ? 443 : 80;
|
||||
}
|
||||
if ("wss".equalsIgnoreCase(uri.getScheme())) {
|
||||
return SSLSocketFactory.getDefault().createSocket(uri.getHost(), port);
|
||||
}
|
||||
return new Socket(uri.getHost(), port);
|
||||
}
|
||||
|
||||
private void handshake(URI uri) throws Exception {
|
||||
byte[] nonce = new byte[16];
|
||||
new SecureRandom().nextBytes(nonce);
|
||||
String key = Base64.encodeToString(nonce, Base64.NO_WRAP);
|
||||
String host = uri.getPort() == -1 ? uri.getHost() : uri.getHost() + ":" + uri.getPort();
|
||||
String request = "GET " + uri.getRawPath() + " HTTP/1.1\r\n"
|
||||
+ "Host: " + host + "\r\n"
|
||||
+ "Upgrade: websocket\r\n"
|
||||
+ "Connection: Upgrade\r\n"
|
||||
+ "Sec-WebSocket-Key: " + key + "\r\n"
|
||||
+ "Sec-WebSocket-Version: 13\r\n"
|
||||
+ "\r\n";
|
||||
output.write(request.getBytes(StandardCharsets.US_ASCII));
|
||||
output.flush();
|
||||
|
||||
String response = readHttpHeaders();
|
||||
if (!response.startsWith("HTTP/1.1 101") && !response.startsWith("HTTP/1.0 101")) {
|
||||
throw new IllegalStateException("WebSocket handshake failed: " + response.split("\r\n")[0]);
|
||||
}
|
||||
String expected = websocketAccept(key);
|
||||
if (!response.toLowerCase(java.util.Locale.US).contains("sec-websocket-accept: " + expected.toLowerCase(java.util.Locale.US))) {
|
||||
throw new IllegalStateException("WebSocket accept header mismatch");
|
||||
}
|
||||
}
|
||||
|
||||
private String readHttpHeaders() throws Exception {
|
||||
java.io.ByteArrayOutputStream buffer = new java.io.ByteArrayOutputStream();
|
||||
int previous3 = -1;
|
||||
int previous2 = -1;
|
||||
int previous1 = -1;
|
||||
int current;
|
||||
while ((current = input.read()) != -1) {
|
||||
buffer.write(current);
|
||||
if (previous3 == '\r' && previous2 == '\n' && previous1 == '\r' && current == '\n') {
|
||||
break;
|
||||
}
|
||||
previous3 = previous2;
|
||||
previous2 = previous1;
|
||||
previous1 = current;
|
||||
}
|
||||
return buffer.toString("US-ASCII");
|
||||
}
|
||||
|
||||
private static String websocketAccept(String key) throws Exception {
|
||||
String source = key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
|
||||
MessageDigest digest = MessageDigest.getInstance("SHA-1");
|
||||
return Base64.encodeToString(digest.digest(source.getBytes(StandardCharsets.US_ASCII)), Base64.NO_WRAP);
|
||||
}
|
||||
|
||||
private void readLoop() throws Exception {
|
||||
while (!closed) {
|
||||
Frame frame = readFrame();
|
||||
if (frame.opcode == 1) {
|
||||
handleText(new String(frame.payload, StandardCharsets.UTF_8));
|
||||
} else if (frame.opcode == 8) {
|
||||
return;
|
||||
} else if (frame.opcode == 9) {
|
||||
sendFrame(10, frame.payload);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private Frame readFrame() throws Exception {
|
||||
int first = input.read();
|
||||
int second = input.read();
|
||||
if (first == -1 || second == -1) {
|
||||
throw new IllegalStateException("WebSocket closed");
|
||||
}
|
||||
int opcode = first & 0x0f;
|
||||
boolean masked = (second & 0x80) != 0;
|
||||
long length = second & 0x7f;
|
||||
if (length == 126) {
|
||||
length = ((long) input.read() << 8) | input.read();
|
||||
} else if (length == 127) {
|
||||
length = 0;
|
||||
for (int i = 0; i < 8; i++) {
|
||||
length = (length << 8) | input.read();
|
||||
}
|
||||
}
|
||||
byte[] mask = null;
|
||||
if (masked) {
|
||||
mask = readExactly(4);
|
||||
}
|
||||
byte[] payload = readExactly((int) length);
|
||||
if (masked && mask != null) {
|
||||
for (int i = 0; i < payload.length; i++) {
|
||||
payload[i] = (byte) (payload[i] ^ mask[i % 4]);
|
||||
}
|
||||
}
|
||||
return new Frame(opcode, payload);
|
||||
}
|
||||
|
||||
private byte[] readExactly(int length) throws Exception {
|
||||
byte[] data = new byte[length];
|
||||
int offset = 0;
|
||||
while (offset < length) {
|
||||
int read = input.read(data, offset, length - offset);
|
||||
if (read == -1) {
|
||||
throw new IllegalStateException("WebSocket closed");
|
||||
}
|
||||
offset += read;
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
private void handleText(String text) throws Exception {
|
||||
JSONObject message = new JSONObject(text);
|
||||
String type = message.optString("type", "");
|
||||
if ("output".equals(type)) {
|
||||
listener.onOutput(message.optString("data", ""));
|
||||
} else if ("error".equals(type)) {
|
||||
listener.onError(message.optString("message", "Terminal error"));
|
||||
} else if ("session-exit".equals(type)) {
|
||||
close();
|
||||
}
|
||||
}
|
||||
|
||||
private void sendJson(JSONObject object) {
|
||||
try {
|
||||
sendFrame(1, object.toString().getBytes(StandardCharsets.UTF_8));
|
||||
} catch (Exception error) {
|
||||
if (!closed) {
|
||||
listener.onError(error.getMessage() == null ? error.toString() : error.getMessage());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void sendMessage(String type, Object... keyValues) {
|
||||
try {
|
||||
JSONObject object = new JSONObject();
|
||||
object.put("type", type);
|
||||
for (int i = 0; i + 1 < keyValues.length; i += 2) {
|
||||
object.put(String.valueOf(keyValues[i]), keyValues[i + 1]);
|
||||
}
|
||||
sendJson(object);
|
||||
} catch (Exception error) {
|
||||
if (!closed) {
|
||||
listener.onError(error.getMessage() == null ? error.toString() : error.getMessage());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void sendFrame(int opcode, byte[] payload) throws Exception {
|
||||
synchronized (writeLock) {
|
||||
if (output == null) {
|
||||
return;
|
||||
}
|
||||
output.write(0x80 | opcode);
|
||||
byte[] mask = new byte[4];
|
||||
new SecureRandom().nextBytes(mask);
|
||||
int length = payload.length;
|
||||
if (length < 126) {
|
||||
output.write(0x80 | length);
|
||||
} else if (length <= 0xffff) {
|
||||
output.write(0x80 | 126);
|
||||
output.write((length >>> 8) & 0xff);
|
||||
output.write(length & 0xff);
|
||||
} else {
|
||||
output.write(0x80 | 127);
|
||||
for (int i = 7; i >= 0; i--) {
|
||||
output.write((length >>> (8 * i)) & 0xff);
|
||||
}
|
||||
}
|
||||
output.write(mask);
|
||||
byte[] masked = Arrays.copyOf(payload, payload.length);
|
||||
for (int i = 0; i < masked.length; i++) {
|
||||
masked[i] = (byte) (masked[i] ^ mask[i % 4]);
|
||||
}
|
||||
output.write(masked);
|
||||
output.flush();
|
||||
}
|
||||
}
|
||||
|
||||
private static final class Frame {
|
||||
final int opcode;
|
||||
final byte[] payload;
|
||||
|
||||
Frame(int opcode, byte[] payload) {
|
||||
this.opcode = opcode;
|
||||
this.payload = payload;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user