index.js

const express = require("express");
const cors = require("cors");
const bodyParser = require("body-parser");
const compiler = require("compilex");
const path = require("path");

const app = express();
const options = { stats: true };
compiler.init(options);

app.use(cors());
app.use(bodyParser.json());

// Serve static files dynamically using path module
app.use(
  "/codemirror-5.65.16",
  express.static(path.resolve(__dirname, "codemirror-5.65.16"))
);

// Serve the main HTML file dynamically
app.get("/", function (req, res) {
  compiler.flush(function () {
    // Callback logic if needed
  });
  res.sendFile(path.resolve(__dirname, "index.html"));
});

app.post("/compile", function (req, res) {
  var code = req.body.code;
  var input = req.body.input;
  var lang = req.body.lang;

  try {
    if (lang == "C++") {
      if (!input) {
        var envData = {
          OS: "windows",
          cmd: "g++",
          options: { timeout: 10000 },
        };
        compiler.compileCPP(envData, code, function (data) {
          if (data.output) {
            res.send(data);
          } else {
            res.send({ output: "error" });
          }
        });
      } else {
        var envData = {
          OS: "windows",
          cmd: "g++",
          options: { timeout: 10000 },
        };
        compiler.compileCPPWithInput(envData, code, input, function (data) {
          if (data.output) {
            res.send(data);
          } else {
            res.send({ output: "error" });
          }
        });
      }
    } else if (lang == "Java") {
      if (!input) {
        var envData = { OS: "windows" };
        compiler.compileJava(envData, code, function (data) {
          if (data.output) {
            res.send(data);
          } else {
            res.send({ output: "error" });
          }
        });
      } else {
        var envData = { OS: "windows" };
        compiler.compileJavaWithInput(envData, code, input, function (data) {
          if (data.output) {
            res.send(data);
          } else {
            res.send({ output: "error" });
          }
        });
      }
    } else if (lang == "Python") {
      if (!input) {
        var envData = { OS: "windows" };
        compiler.compilePython(envData, code, function (data) {
          if (data.output) {
            res.send(data);
          } else {
            res.send({ output: "error" });
          }
        });
      } else {
        var envData = { OS: "windows" };
        compiler.compilePythonWithInput(envData, code, input, function (data) {
          if (data.output) {
            res.send(data);
          } else {
            res.send({ output: "error" });
          }
        });
      }
    }
  } catch (e) {
    console.log("error");
  }
});

const PORT = process.env.PORT || 8000;
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});