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server.js
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server.js
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//Installation
// git clone https://github.com/ggerganov/llama.cpp.git
// cd llama.cpp
// sed -i 's/-arch=native/-arch=all/g' Makefile
// make clean && LLAMA_CUBLAS=1 make -j
//Copyright Denis Spasyuk
//License MIT
import express from 'express';
import { spawn, exec } from 'child_process';
import http from 'http';
import { Server as socketIO } from 'socket.io';
import cors from 'cors';
import path from 'path';
import { fileURLToPath } from 'url';
import vdb from './src/db.js';
import DDG from './src/ddg.js';
import fs from 'fs';
import downloadModel from './src/modeldownloader.js';
import session from 'express-session';
import MemoryStoreModule from 'memorystore';
import hash from "./src/hash.js";
const Hash = new hash();
import config from './config.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const MemoryStore = MemoryStoreModule(session);
const memStore = new MemoryStore();
const version = 0.331; //changed public and server and config
function ser() {}
ser.modelinit = async function () {
if (fs.existsSync(config.params["--model"])) {
console.log("Model exists");
} else {
console.log("Downloading the model", config.params["--model"]);
console.log("Model repo: " + config.modelrepo, config.modelname, config.modeldirectory);
await downloadModel(
config.modelrepo,
config.modelname,
config.modeldirectory
);
}
};
ser.init = function (error) {
console.log(
config.llamacpp + " " + Object.entries(config.params).flat().join(" ")
);
this.connectedClients = new Map();
this.socketId = null;
this.messageQueue = []; // Queue to store messages from clients
this.isProcessing = false; // Flag to track if a message is being processed
this.runLLamaChild();
this.piper_client_enabled = true;
if (config.piper.enabled) {
this.fullmessage = "";
this.piperChild();
}
// Listen for the 'exit' event to handle process exit.
this.app = express();
this.server = http.createServer(this.app);
config.session.store = memStore;
this.sessionStore = session(config.session);
this.app.use(this.sessionStore);
this.app.use(cors());
this.io = new socketIO(this.server, {
cors: {
origin: "*",
methods: ["GET", "POST"],
credentials: true,
},
});
this.io.engine.use(this.sessionStore);
this.io.use(async (socket, next) => {
// Check authentication status here
const sessionID = socket.handshake.query.sessionID;
// Check authentication using the session ID
const isValid = await ser.isValidSession(sessionID);
// console.log("Session is valid", isValid);
if (isValid) {
return next();
} else {
socket.emit("redirect-login");
}
// Reject unauthorized connections
return next(new Error("Unauthorized"));
});
this.io.on("connection", (socket) => this.handleSocketConnection(socket));
this.app.use(express.json());
this.app.use(express.urlencoded({ extended: true }));
this.app.set("views", path.join(__dirname, "views"));
this.app.set("view engine", "ejs");
this.app.use(express.static(path.join(__dirname, "public")));
this.app.use(express.static(path.join(__dirname, "docs")));
// Define a route to render the EJS view
this.app.get("/", ser.loggedIn, (req, res, next) => {
const sessionID = req.sessionID;
// console.log("Session ID", config.piper.rate);
res.render("index", {
title: "Llama.cui",
version: version,
hostname: config.IP.client,
port: config.PORT.client,
testQs: config.testQuestions,
sessionID: sessionID,
embedding: config.embedding,
piper: {rate:config.piper.rate, enabled:config.piper.enabled},
});
});
this.app.post("/stopper", async (request, response) => {
console.log("STOPPING");
ser.llamachild.kill("SIGINT");
this.messageQueue.splice(0, 1);
this.isProcessing = false;
this.processMessageQueue();
response.send({ message: "stopped" });
});
this.app.get("/login", (req, res) => {
if (!config.login) {
return res.redirect("/");
} else {
res.render("login", { title: "login" });
}
});
this.app.get("/logout", async (req, res) => {
req.session.destroy();
// res.render("logout", { user: config.username });
return res.redirect("/login");
});
this.app.post("/login", async (req, res) => {
const sessionID = req.sessionID;
if (!config.login) {
return res.redirect("/");
} else {
const username = req.body.username;
const password = req.body.password;
try {
if (!username || !password) {
res.render("login", { title: "login" });
} else {
let users = await config.loginTrue(username); //replace this with database query
if (users.length === 0) {
res.render("login", { title: "login" });
} else {
// Compare the provided password with the stored password
if (await Hash.comparePassword(password, users.password)) {
// Authentication successful
req.session.loggedin = true;
req.session.user = { username };
if (req.xhr) {
// Send JSON response
res.json({ success: true, sessionID });
} else {
// Redirect to the "/" page
res.redirect("/");
}
// console.log("Login Successful");
} else {
res.render("login", { title: "login" });
}
}
}
} catch (error) {
// Handle errors gracefully
console.error("Error during login:", error);
res.status(500).send("Internal Server Error");
}
}
});
this.start();
ser.open();
};
ser.isValidSession = function (sessionID) {
return new Promise((resolve, reject) => {
memStore.get(sessionID, (err, session) => {
if (err) {
console.error("Error validating session:", err);
reject(err);
} else {
// Assuming a session is valid if it exists
resolve(!!session);
}
});
});
};
ser.runLLamaChild = function () {
var configParams = Object.entries(config.params).flat();
this.llamachild = spawn(
config.llamacpp,
configParams.filter((item) => item !== ""),
{
stdio: ["pipe", "pipe", process.stderr],
}
);
this.llamachild.stdin.setEncoding("utf-8");
this.llamachild.stdout.setEncoding("utf-8");
this.llamachild.stdout.on("data", (msg) => this.handleLlama(msg));
this.llamachild.on("exit", (code, signal) => {
if (code !== null) {
console.log(`Child process exited with code ${code}`);
this.runLLamaChild();
} else if (signal !== null) {
console.log(`Child process terminated by signal ${signal}`);
this.runLLamaChild();
}
});
};
ser.loggedIn = function (req, res, next) {
if (!config.login) {
req.session.loggedin = true;
}
if (req.session.loggedin) {
next();
} else {
res.redirect("/login");
}
};
ser.aplayChild = function () {
this.aplay = spawn("aplay", [
"-r",
config.piper.rate,
"-f",
config.piper.output_file,
"-t",
"raw",
"-",
]);
};
ser.piperChild = function () {
// console.log(`${config.piper.exec} --model ${config.piper.model} --output-raw`);
this.piper = spawn(config.piper.exec, [
"--model",
config.piper.model,
"--output-raw",
], {
stdio: ["pipe", "pipe", "pipe"],
});
this.piper.stdout.on('data', (data) => {
//16-bit mono PCM samples buffers
ser.io.to(this.socketId).emit("buffer", data);
});
this.piper.stderr.on("error", (error) => {
console.error("An error occurred in the piper child process:", error);
});
};
ser.open = function () {
var url = "http://"+config.IP.client + ":" + config.PORT.client;
var start = (process.platform == 'darwin'? 'open': process.platform == 'win32'? 'start': 'xdg-open');
exec(start + ' ' + url);
};
ser.webseach = async function(input){
const ddg = new DDG({limit:4});
var ggsearch = [];
for await (const result of ddg.text(input)) {
if(result && result.content!=null){
// console.log(result);
ggsearch.push(result);
}
}
return ggsearch;
}
ser.runPiper = function (output) {
if (config.piper.enabled) {
this.fullmessage += " " + output;
if (
this.fullmessage.includes(".") ||
this.fullmessage.includes(":") ||
this.fullmessage.includes(";") ||
this.fullmessage.includes("!") ||
this.fullmessage.includes("?") ||
this.fullmessage.includes("\n")
) {
if(this.piper_client_enabled){
var submit = this.fullmessage;
this.piper.stdin.write(submit.replace(/\*/g, '').replace(/\#/g, ''));
}
// console.log("fullmesd", this.fullmessage);
this.fullmessage = "";
}
}
};
ser.handleLlama = function (msg) {
this.buffer += msg.toString("utf-8");
let lastSpaceIndex = this.buffer.lastIndexOf(" ");
if (lastSpaceIndex !== -1) {
let output = this.buffer.substring(0, lastSpaceIndex);
this.buffer = this.buffer.substring(lastSpaceIndex + 1);
// output = parseOutput(output);
output = config.outputFilter(output);
// console.log(JSON.stringify(output));
if (output) {
clearTimeout(this.streamTimeout);
}
this.io.to(this.socketId).emit("output", output);
this.runPiper(output);
if (output.includes("\n\n>")) {
// console.log("Stopped");
this.messageQueue.splice(0, 1);
this.isProcessing = false;
this.processMessageQueue();
}
}
};
ser.processMessageQueue = function () {
if (this.messageQueue.length === 0) {
this.isProcessing = false;
return;
}
this.isProcessing = true;
const message = this.messageQueue[0];
const { socketId, input, embed, piper } = message;
this.socketId = socketId;
this.piper_client_enabled = piper;
// Send the message to the child process
this.llamachild.stdin.cork();
this.llamachild.stdin.write(`${input}`);
this.llamachild.stdin.write("\n");
this.llamachild.stdin.uncork();
};
ser.handleTimeout = function () {
console.log("Timeout");
ser.isProcessing = false;
ser.llamachild.kill("SIGINT");
};
ser.tokenCount = function (text) {
const tokens = text.match(/\b\w+\b/g) || [];
const tokensarr = tokens.filter(token => /\S/.test(token))
return [tokensarr, tokensarr.length];
};
ser.TokenLimit = function(objects, maxTokens, tokenCounter) {
let embed = "";
let totalTokens = 0;
let cutobj = [];
for (let obj of objects) {
let objStr = JSON.stringify(obj);
let [tokens, tokenLen] = tokenCounter(objStr); // Use tokenCounter to count tokens
if (totalTokens + tokenLen > maxTokens) {
// Truncate the object string to fit the remaining tokens
let remainingTokens = maxTokens - totalTokens;
objStr = tokens.slice(0, remainingTokens).join(" ");
totalTokens += remainingTokens;
embed += objStr;
break; // Stop once we've reached the limit
}
totalTokens += tokenLen;
embed += objStr;
cutobj.push(obj);
}
return [embed, cutobj]; // Return the concatenated string within token limit
}
ser.handleSocketConnection = async function (socket) {
if (socket.request.session) {
socket.on("message", async (data) => {
var input = data.message;
var socketId = data.socketid;
var embed = "";
var embedobj = [];
if (data.embedding.db) {
embedobj = embedobj.concat(await vdb.init(input));
}
if(config.embedding.WebSearch && data.embedding.web && input.length < 100){
const searchRes = await ser.webseach(input);
embedobj = embedobj.concat(searchRes);
}
if(embed!=null || embed!=undefined || embed!= ""){
[embed, embedobj] = ser.TokenLimit(embedobj, config.maxTokens, ser.tokenCount);
this.io.to(socketId).emit("output", embedobj);
}
input = config.prompt(socketId, input, embed, data.firstchat || false);
input = input + "\\";
let piper = data.piper;
this.connectedClients.set(socketId, input);
// Add the incoming message to the queue
this.messageQueue.push({ socketId, input, embed, piper});
this.streamTimeout = setTimeout(this.handleTimeout, config.timeout);
// Process messages if the queue is not being processed currently
if (!this.isProcessing) {
this.processMessageQueue();
}
});
socket.on("tosound", async (data) => {
if(data.mode==="start"){
this.socketId = data.socketid;
this.piper_client_enabled = data.piper;
// console.log("start", data.socketid);
this.runPiper(data.message+"\n");
}
if(data.mode==="stop"){
// console.log("stop", data.socketid);
this.socketId = data.socketid;
this.piper.kill("SIGINT");
ser.piperChild();
}
})
socket.on("error", function () {
console.log("Error", error);
});
socket.on("disconnect", () => {
this.connectedClients.delete(socket.id);
});
} else {
console.log("Not Logged In!");
socket.disconnect(true);
}
};
ser.start = function () {
this.server.listen(config.PORT.server, config.IP.server, () => {
console.log(
"Server Running on:",
config.IP.server + ":" + config.PORT.server
);
});
};
async function run() {
await ser.modelinit();
ser.init();
}
run();
process.on('SIGINT', () => {
console.log('Received SIGINT. Terminating processes...');
if (ser.llamachild) ser.llamachild.kill('SIGINT');
if (ser.piper) ser.piper.kill('SIGINT');
process.exit(0); // Exit the main process
});
export default ser;