How to download file from Sanity via HTTP? - sanity

Question

I would like to know if there is possibility to download file from Sanity with HTTP request?
I only have reference ID:
{
file: {
asset: {
_ref: "file-fxxxxxxxxxxxxxxxxxxxx-xlsx"
_type: "reference"
}
}
}
I would like to do this is this scenario:
<a href="https://cdn.sanity.io/assets/clientID/dataset/file-xxxxxxxxxxx-xlsx">
Download File
</a>

Answer 1

You can, indeed 🎉 With a bit of custom code you can do it just from the _ref, which is the file document's _id
Creating the URL from the _ref/_id of the file
The _ref/_id structure is something like this: file-{ID}-{EXTENSION} (example: file-207fd9951e759130053d37cf0a558ffe84ddd1c9-mp3).
With this, you can generate the downloadable URL, which has the following structure: https://cdn.sanity.io/files/{PROJECT_ID}/{DATASET}/{ID_OF_FILE}.{EXTENSION}. Here's some pseudo Javascript code for the operation:
const getUrlFromId = ref => {
// Example ref: file-207fd9951e759130053d37cf0a558ffe84ddd1c9-mp3
// We don't need the first part, unless we're using the same function for files and images
const [_file, id, extension] = ref.split('-');
return `https://cdn.sanity.io/files/${PROJECT_ID}/${DATASET}/${id}.${extension}`
}
Querying the URL directly
However, if you can query for the file's document with GROQ that'd be easier:
*[(YOUR FILTER HERE)] {
file->{ url } // gets the URL from the referenced file
}
You can do the same with images, too.