Javascript Blob function is not downloading binary content

Question

This javascript code does not download the actual file, but instead it puts the path+filename of the URL into the contents of a file named requestRouter_amd64.msi:

 <p>
 <script type = "text/javascript">

    async function downloadFile(filePathAndName, fileDataContentType, fileName) {
    try {
        fileDataContentType = "octet/stream"
            const blob = new Blob([filePathAndName], {
            type: fileDataContentType
        });
        const link = document.createElement('a');
        link.href = window.URL.createObjectURL(blob);
        link.download = fileName;
        link.click();

    } catch (error) {}
}


downloadFile("https://download.microsoft.com/download/E/9/8/E9849D6A-020E-47E4-9FD0-A023E99B54EB/requestRouter_amd64.msi", "application/zip", "requestRouter_amd64.msi");


 </script>
</p>

I also tried "application/zip" for the fileDataContentType but same result.

That's what the Blob constructor does. It doesn't actually do any network interaction. You need to use fetch or XMLHttpRequest to download the contents of a file to bytes, then pass the array of bytes to the Blob constructor. — Heretic Monkey
– Heretic Monkey, Commented Dec 15, 2020 at 23:22
Does this answer your question? Download Binary Files with Javascript — Heretic Monkey
– Heretic Monkey, Commented Dec 15, 2020 at 23:30
I wish, I just don't know what, in that link, in option 1 and 2 on the linese open("GET", they have requestUrl. Is requestUrl supposed to be filled in withthe full url to the file? Like download.domain.com/file.msi? And if so, is it surrounded by single or double quotes? — JeffR
– JeffR, Commented Dec 15, 2020 at 23:35

JeffR · Accepted Answer · 2020-12-16 12:46:44Z

0

The blob, from what I've seen, consumes client memory. So I followed the last entered solution at this solution to download the file via a stream. Works like a treat, even though I did not use the CSS to move the link.

answered Dec 16, 2020 at 12:46

JeffR

8353 gold badges10 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Javascript Blob function is not downloading binary content

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related