Download binary file with Axios

Question

For example, downloading of PDF file:

axios.get('/file.pdf', {
      responseType: 'arraybuffer',
      headers: {
        'Accept': 'application/pdf'
      }
}).then(response => {
    const blob = new Blob([response.data], {
      type: 'application/pdf',
    });
    FileSaver.saveAs(blob, 'file.pdf');
});

The contend of downloaded file is:

[object Object]

What is wrong here? Why binary data not saving to file?

Answer 1

I was able to create a workable gist (without using FileSaver) as below:

axios.get("http://my-server:8080/reports/my-sample-report/",
        {
            responseType: 'arraybuffer',
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/pdf'
            }
        })
        .then((response) => {
            const url = window.URL.createObjectURL(new Blob([response.data]));
            const link = document.createElement('a');
            link.href = url;
            link.setAttribute('download', 'file.pdf'); //or any other extension
            document.body.appendChild(link);
            link.click();
        })
        .catch((error) => console.log(error));

Hope it helps.

Cheers !

Answer 2

---

It looks like response.data is just a regular object. Blobs take in their first argument "an Array of ArrayBuffer, ArrayBufferView, Blob, or DOMString objects."

Try wrapping it in JSON.stringify

const blob = new Blob([JSON.stringify(response.data)]

Then it will satisfy the DOMString requirement.