refactor: rewrite rpc server client

Signed-off-by: MiaoWoo <admin@yumc.pw>

public/index.js

@@ -0,0 +1,69 @@
+Terminal.applyAddon(fit);
+Terminal.applyAddon(attach);
+Terminal.applyAddon(fullscreen);
+var term = new Terminal({
+    cursorBlink: true,
+    screenKeys: true
+});
+term.open(document.getElementById('terminal'));
+term.toggleFullScreen();
+term.fit();
+
+var cmd = ''
+term.on('data', (data) => {
+    if (data == '\r') {
+        term.writeln(data)
+        if (cmd.startsWith('/')) {
+            args = cmd.split(' ');
+            cmd = args[0].substr(1);
+            switch (cmd) {
+                case "connect":
+                    let address = args[1] || 'https://tera-ws.miaowoo.cc/web'
+                    term.writeln(`Connect to ${address}...`)
+                    newcon(address)
+                    break;
+                case "disconnect":
+                    socket.close();
+                    break;
+            }
+        } else {
+            socket && socket.emit('webmsg', { cmd });
+        }
+        cmd = ''
+        return
+    }
+    cmd += data;
+    term.write(data)
+});
+let socket = undefined
+function newcon(address) {
+    if (socket) {
+        socket.close()
+    }
+    socket = io(address, {
+        path: '/ws',
+        transports: ['websocket']
+    });
+    socket.on('connect', function() {
+        term.writeln('connect')
+        socket.emit('webclient', {})
+    });
+    socket.on('message', function(data) {
+        if (typeof data === "string") {
+            term.writeln(data);
+        } else {
+            for (const line of JSON.stringify(data, undefined, 4).split('\n')) {
+                term.writeln(line);
+            }
+        }
+    });
+    socket.on('disconnect', function() {
+        term.reset();
+        term.writeln('disconnect')
+    });
+    socket.connect()
+}
+window.onresize = function() {
+    term.fit();
+    term.scrollToBottom();
+};