Mastodon uploadMedia fails in Docker

[ASTRELION]

I have a strange issue where uploadMedia will fail with an Axios 500 error only if a description is provided, it's running in Docker, and seemingly any other client function is called at some point before (in my example, it's verifyAccountCredentials)

If I'm not in Docker, or I don't verifyAccountCredentials, or I don't provide a description, everything works fine. Interestingly, if I set this up to keep retrying uploadMedia on an exponential interval, it will keep failing for 10-15m, and then eventually succeed.

For example, this code will fail:

import generator from "megalodon";
import fs from "fs";

const client = generator("mastodon", "https://mastodon.social", "MY_ACCESS_TOKEN");

await client.verifyAccountCredentials(); // or seemingly any other client call like postStatus, getInstance, etc.
const media = await client.uploadMedia(fs.createReadStream("/tmp/0195e836-01c0-7000-a91a-f90d85a62f21.png"), { description: "Hello" }); // axios 500 error here
const post = await client.postStatus("hello", { media_ids: [media.data.id] });

But both of these examples will not fail:

import generator from "megalodon";
import fs from "fs";

const client = generator("mastodon", "https://mastodon.social", "MY_ACCESS_TOKEN");

// note lack of verifyAccountCredentials
// await client.verifyAccountCredentials();
const media = await client.uploadMedia(fs.createReadStream("/tmp/0195e836-01c0-7000-a91a-f90d85a62f21.png"), { description: "Hello" });
const post = await client.postStatus("hello", { media_ids: [media.data.id] });
// successfully uploads and posts

import generator from "megalodon";
import fs from "fs";

const client = generator("mastodon", "https://mastodon.social", "MY_ACCESS_TOKEN");

await client.verifyAccountCredentials();
const media = await client.uploadMedia(fs.createReadStream("/tmp/0195e836-01c0-7000-a91a-f90d85a62f21.png")); // note the lack of description
const post = await client.postStatus("hello", { media_ids: [media.data.id] });
// successfully uploads and posts

(The above examples were all ran via an identical Dockerfile)

[h3poteto]

Hmm, can you please share your Dockerfile? And are you using mastodon.social?

[ASTRELION]

This is the one I've been using to test this. main.js is just the content of the above examples, no other code.

FROM oven/bun:1-slim AS build

COPY main.js /main.js

RUN bun install megalodon

CMD [ "bun", "run", "/main.js" ]

And this is the Docker command I'm using to run this with the png in ./tmp:

sudo docker build . -t testimg
sudo docker run --rm -v "./tmp:/tmp" -it testimg

[h3poteto]

Hmm, it's interesting. When I remove verifyAccountCredentials, it works properly.

[ASTRELION]

Yeah it seems to happen with any other client function if used before uploadMedia, too. I'm not sure if this is a weird issue with mastodon.social itself or a problem with this library. My best guess would be some sort of caching issue or something since it eventually works if you put just the uploadMedia call in a loop.

It's very strange that simply a description (which I see is just additional FormData) causes things to break.

[ASTRELION]

Just wanted to mention that this is still an issue on the latest versions, and I believe also happens outside of Docker, but I can't confirm the latter at the moment.

I've unfortunately had to move to a different client to workaround this issue, so I don't think it's a problem with the Mastodon instance itself or necessarily the Docker environment since other clients seem to work fine.

Let me know if there's any other info I can provide to try to get to the bottom of this :).