Docly Developers
Function Updated 17 Oct 2026

downloadFromUrl64(mimeType, url)

Downloads a file from the specified URL and returns it as a base64 data URL (data:<mimeType>;base64,...), ready to use in an img src or a CSS url(). Only http:// and https:// URLs are allowed. The request goes through the same outbound guard as httpFetch: Docly controller domains and link-local/cloud-metadata addresses are blocked. Throws if the download fails or the server answers with an error status.

See also downloadFromUrl httpGet

Parameters

mimeTypestringrequired

MIME type written into the data URL, e.g. "image/png". It is not detected from the response — pass the type of the file you download.

urlstringrequired

URL to download with HTTP GET (http:// or https://).

Returns

Returns the downloaded bytes as a data URL: "data:" + mimeType + ";base64," + base64 content. Returns null unless exactly two arguments are given.

Example

Mixed HTML (or any text file) with inline JavaScript between hash signs.
#{
    var src = docly.downloadFromUrl64("image/png", "https://example.com/image.png");
}#
<img src="#src#" alt="Example" />