将循环结构转换为JSON-第三方API

Question

I'm building out a project that is making a call to a blockchain API. Unfortunately, the data I'm getting back is circular so while it works in Postman my server errors when trying to convert it to JSON. I tried using JSON.stringify but nothing changed.

Here's the controller function:

blockchainController.search = (req, res) => {
  axios({
    method: 'GET',
    url: `https://chain.api.btc.com/v3/address/${req.body.address}/tx`
  })
  .then(data => {
    res.json({
      message: 'Transactions loaded',
      data: data
    })
  })
  .catch(err => {
    console.log(err);
    res.send(err);
  })
};

Any ideas for a workaround or a fix? I'd like to be able to send this data to my front-end but it ain't happening.

Answer 1

A solution could be to use a library designed to prune circular references.

I happen to have built such library: https://github.com/Canop/JSON.prune

You can simply call it with

let json = JSON.prune(yourCircularObject);

This adds some "-pruned-" marks whenever a reference is ignored.

If you prefer a "silent" removal, you can do

let json = JSON.prune(yourCircularObject, {prunedString: undefined });