getting Type Error even after getting Response

Question

const express = require("express");
const app = express();
const axios = require("axios");
const ethers = require("ethers");
require("dotenv").config();

app.get("/:address", async (req, res) => {
  const SUBGRAPH = process.env.SubGraph_URL;
  const ServerAddress = process.env.Server_ADDRESS;
  const Server_ABI = process.env.Server_ABI;
  let address = req.params.address;
  let query = `{
  publishers(
    where: {Publisher: "${address}"}
  ) {
    Advertisers
  }
}`;
  let AdId;
  let AdLink;
  await axios
    .post(SUBGRAPH, { query })
    .then((response) => {
      return response.data.data.publishers[0].Advertisers.length;
    })
    .then((length) => {
      let x = Math.floor(Math.random() * length);
      AdId = x + 1;
    })
    .catch((error) => {
      console.log(error);
    });

  query = `{
        ads(where:{AdId:"${AdId}"}) {
            AdData
        }
    }`;
  await axios
    .post(SUBGRAPH, { query })
    .then((response) => {
      let x = response.data.data.ads[0];
      return x.AdData;
    })
    .then((link) => {
      let x = axios.get(link);
      return x;
    })
    .then((response) => {
      AdLink = response.data.ImgLink;
    })
    .catch((error) => {
      console.log(error);
    });
  const handleClick = async () => {
  };
  const html = `
  <!DOCTYPE html>
  <html>
    <head>
    </head>
    <body>
      <h1>Ad</h1>
      <a href="">
      <img src="${AdLink}" alt="Ad Image" border="1" onClick="${handleClick}"></img></a>
      <img src="xyz/abc/cls
  }" height="1" width="1" style={display:none} />
    </body>
  </html>`;
  res.send(html);
  res.end();
});

app.listen(3000, () => {
  console.log("Server is running on port 3000");
});

im my code after running it on localhost im etting the links and desired html but also getting an error msg on console i tried differnet ways but im getting nothing Im new to this can anoyone explain the error im ggetting this error

TypeError: Cannot read properties of undefined (reading 'publishers')
    at C:\Users\rishi\OneDrive\Desktop\Karthikeya\Ad-Server-API\index.js:24:33
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async C:\Users\rishi\OneDrive\Desktop\Karthikeya\Ad-Server-API\index.js:21:3
TypeError: Cannot read properties of undefined (reading 'ads')
    at C:\Users\rishi\OneDrive\Desktop\Karthikeya\Ad-Server-API\index.js:42:34
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async C:\Users\rishi\OneDrive\Desktop\Karthikeya\Ad-Server-API\index.js:39:3

in this if an user makes an request to our api with his address we will send an html doc containing the img it is an ad server project

getting Type Error even after getting Response

0 Answers0