get-posts-of-user-instagram.js

/**
 * login to your instagram account
 * open browser's console (cmd option j on chrome macOS)
 * run the following command:
 * getData('mpt681988')
 * mpt681988 is insta username
 */

/** Convert a 2D array into a CSV string
 */
function arrayToCsv(data) {
  return data
    .map(
      (row) =>
        row
          .map(String) // convert every value to String
          .map((v) => v.replaceAll('"', '""')) // escape double colons
          .map((v) => `"${v}"`) // quote it
          .join(",") // comma-separated
    )
    .join("\r\n"); // rows starting on new lines
}

/** Download contents as a file
 * Source: https://stackoverflow.com/questions/14964035/how-to-export-javascript-array-info-to-csv-on-client-side
 */
function downloadBlob(content, filename, contentType) {
  // Create a blob
  var blob = new Blob([content], { type: contentType });
  var url = URL.createObjectURL(blob);

  // Create a link to download it
  var pom = document.createElement("a");
  pom.href = url;
  pom.setAttribute("download", filename);
  pom.click();
}

function extractResponse(responseData) {
  let posts = responseData.data.user.edge_owner_to_timeline_media.edges;
  let result = [];

  posts.forEach((post) => {
    let username = post.node.owner.username;
    let id = post.node.id;
    let link = `instagram.com/p/${post.node.shortcode}`;
    let description = "";
    let captionEdges = post.node.edge_media_to_caption.edges;
    let images = [post.node.display_url];

    if (captionEdges.length > 0) {
      description = captionEdges[0].node.text;
    }

    if (post.node.edge_sidecar_to_children) {
      let children = post.node.edge_sidecar_to_children.edges;
      images = children.map((child) => child.node.display_url);
    }
    result.push({ id, link, username, description, images });
  });
  return result;
}

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}
async function formatResponseToRows(posts) {
  let rows = [];
  if (posts.length == 0) {
    return { rows };
  }

  let images = {};

  posts.forEach((post) => {
    images[post.id] = post.images;
  });

  let username = posts[0].username;
  console.log(images);

  for (let postID in images) {
    for (let j = 0; j < images[postID].length; j += 1) {
      await sleep(200);
      let imageName = `${username}-${postID}-${j}`;
      let imageLink = images[postID][j];
      images[postID][j] = imageName;
      await downloadImage(imageLink, imageName);
    }
  }

  posts.forEach((post) => {
    let row = [post.username, post.link, post.description];
    post.images.forEach((image) => {
      row.push(image);
    });
    rows.push(row);
    images[post.id] = post.images;
  });

  return { rows };
}

async function downloadImage(imageSrc, imageName) {
  const image = await fetch(imageSrc);
  const imageBlog = await image.blob();
  const imageURL = URL.createObjectURL(imageBlog);

  const link = document.createElement("a");
  link.href = imageURL;
  link.download = imageName;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
}

async function getData(username) {
  try {
    let response = await fetch(
      `https://i.instagram.com/api/v1/users/web_profile_info/?username=${username}`,
      {
        headers: {
          "x-ig-app-id": "936619743392459",
        },
        referrer: "https://www.instagram.com/",
        referrerPolicy: "strict-origin-when-cross-origin",
        body: null,
        method: "GET",
        mode: "cors",
        credentials: "include",
      }
    );
    let result = await response.json();
    let posts = extractResponse(result);

    let { rows, images } = await formatResponseToRows(posts);
    console.log(rows);

    downloadBlob(
      arrayToCsv(rows),
      `${username}.csv`,
      "text/csv;charset=utf-8;"
    );
    console.log(images);
  } catch (e) {
    console.log(e);
  }
}

// getData("__viethoan");