Why am I getting 404 ("Resource media not found") on the media upload from the docs? - node.js

Question

The docs for uploading rich media to LinkedIn (https://learn.microsoft.com/en-us/linkedin/marketing/integrations/community-management/shares/rich-media-shares#upload-rich-media) say to make a POST to https://api.linkedin.com/media/upload with form data. As far as I can tell I am doing that correctly using request-promise on my Node server, but I am still getting a 404.
Initially I had a problem with my file, but now I think I am properly creating a Buffer. Even if I'm not, that was preventing me from even making the request, and now I am and I don't think that would cause a 404.
I have also tried using 1.0.0 and 2.0.0 versions of the X-Restli-Protocol-Version (LinkedIn API thing).
// See LinkedIn docs on Rich Media shares https://learn.microsoft.com/en-us/linkedin/marketing/integrations/community-management/shares/rich-media-shares
const stream = require('stream');
const rp = require('request-promise')
async function postRichMediaShare(accessToken) {
try {
const file = await rp({
method: 'get',
url: 'https://local-image-bucket.s3.amazonaws.com/Artboard+copy.png'
});
// Buffer magic
const buffer = new Buffer.from(file);
const bufferStream = new stream.PassThrough();
bufferStream.end( buffer );
bufferStream.pipe( process.stdout );
const options = {
method: 'post',
url: 'https://api.linkedin.com/v2/media/upload',
headers: { 'X-Restli-Protocol-Version': '2.0.0',
"Authorization": `Bearer ${accessToken}` },
formData: {
file: {
value: bufferStream,
options: {
filename: 'Artboard+copy.png',
contentType: 'image/png'
}
}
},
};
const response = await rp(options);
console.log("response", response);
return response;
} catch (error) {
throw new Error(error);
}
}
Instead of the response suggested in the docs, I'm getting this error message from LinkedIn:
error: "{"serviceErrorCode":0,"message":"Resource media does not exist","status":404}"

Answer 1

I'm an idiot. 404 should be expected because I'm requesting https://api.linkedin.com/v2/media/upload and the docs say https://api.linkedin.com/media/upload (no v2/). I believe every other call is versioned. Perhaps an empowered LinkedIn employee reading this could make a route for v2/ that does all the same stuff.
Note, there may be other problems with the code above, I am still struggling but now I'm working on things outside the scope of this question about 404.