BACKEND SETUP

qubitverse/backend/index.js

@@ -0,0 +1,49 @@
+const express = require("express");
+const cors = require("cors");
+const { spawn } = require("child_process");
+
+const app = express();
+
+app.use(express.text());
+
+app.use(
+  cors({
+    origin: "http://localhost:5173",
+  })
+);
+
+app.post("/encode", async (req, res) => {
+  const data = req.body;
+  const cppProcess = spawn("../simulator/simulator/temp");
+  let output = "";
+
+  // Collect output from the C++ program
+  cppProcess.stdout.on("data", (chunk) => {
+    output += chunk.toString();
+  });
+
+  // Handle errors
+  cppProcess.stderr.on("data", (chunk) => {
+    console.error(`Error from C++ parser: ${chunk}`);
+  });
+
+  // When the process completes
+  cppProcess.on("close", (code) => {
+    if (code === 0) {
+      res.send(output);
+    } else {
+      res.status(500).send("Error processing input");
+    }
+  });
+
+  // Send the text directly to the C++ program's stdin
+  cppProcess.stdin.write(data); // Changed from gateData to data
+  cppProcess.stdin.end();
+
+  // Remove the second res.send() that was causing the error
+  // res.send("Data received");
+});
+
+app.listen(5000, () => {
+  console.log("Server is running on port 5000");
+});