Firebase cloud function to send a file to browser as 'download'

[veera.k...@gmail.com]

I have a JavaScript application which compiles a JSON object and sends it to my Firebase cloud function. This function will process the JSON object and creates an XML file and will send this XML file back to browser as a 'downloadable' file.

In Express.js, I could do this with the help of `response.download` [https://expressjs.com/en/api.html#res.download] function. Is there something similar exist in Firebase functions? Please note, my functions are callable function (not the HTTP ones).

[Sam Stern]

Hi there,

That's an interesting question, thanks for the feedback.  Right now there is no way to do this, callable functions must return an object with a "data" property.  This is unlikely to change since callable functions support Android and iOS as well, where a "download" type would not make any sense.  Have you tried doing this with a regular HTTPS function?

- Sam

On Sat, Apr 27, 2019 at 8:09 AM <veera.k...@gmail.com> wrote:

I have a JavaScript application which compiles a JSON object and sends it to my Firebase cloud function. This function will process the JSON object and creates an XML file and will send this XML file back to browser as a 'downloadable' file.

In Express.js, I could do this with the help of `response.download` [https://expressjs.com/en/api.html#res.download] function. Is there something similar exist in Firebase functions? Please note, my functions are callable function (not the HTTP ones).

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