Incorrect MIME Type in Content_Type for Certain Filename Extensions about discord-api-docs

[lmle]

Hey @AWATV! Can you provide us with the exact requests you're sending and responses you're getting? Thanks!

[AWATV]

const { Client, GatewayIntentBits } = require('discord.js');

const client = new Client({
    intents: [
      GatewayIntentBits.Guilds,
      GatewayIntentBits.GuildMessages,
      GatewayIntentBits.MessageContent,
      GatewayIntentBits.GuildMembers,
      GatewayIntentBits.DirectMessages,
    ],
  });

const token = '...';
const guildId = '1195451831149658225';
const channelId = '1196091248201695262';

client.once('ready', async () => {
    console.log('Bot is ready!');

    try {
        const guild = await client.guilds.fetch(guildId);
        if (!guild) throw new Error('Guild not found');

        const channel = guild.channels.cache.get(channelId);
        if (!channel) throw new Error('Channel not found');

        const messages = await channel.messages.fetch({ limit: 1 });
        const lastMessage = messages.first();

        if (lastMessage) {
            console.log('Last Message Attachments:', lastMessage.attachments);
        } else {
            console.log('No messages found in the channel');
        }
    } catch (error) {
        console.error('Error:', error);
    }

    client.destroy();
});

client.login(token);

Bot is ready!
Last Message Attachments: Collection(2) [Map] {
  '1225338377726070794' => Attachment {
    attachment: 'https://cdn.discordapp.com/attachments/1196091248201695262/1225338377726070794/somename.mp3.gz?ex=6620c44a&is=660e4f4a&hm=399aee161711361af26937cb41bd37d19b487bbb2a6658addc0567c6fe07c422&',
    name: 'somename.mp3.gz',
    id: '1225338377726070794',
    size: 5455565,
    url: 'https://cdn.discordapp.com/attachments/1196091248201695262/1225338377726070794/somename.mp3.gz?ex=6620c44a&is=660e4f4a&hm=399aee161711361af26937cb41bd37d19b487bbb2a6658addc0567c6fe07c422&',
    proxyURL: 'https://media.discordapp.net/attachments/1196091248201695262/1225338377726070794/somename.mp3.gz?ex=6620c44a&is=660e4f4a&hm=399aee161711361af26937cb41bd37d19b487bbb2a6658addc0567c6fe07c422&',
    height: null,
    width: null,
    contentType: 'audio/mpeg',
    description: null,
    ephemeral: false,
    duration: null,
    waveform: null,
    flags: AttachmentFlagsBitField { bitfield: 0 }
  },
  '1225338378195828806' => Attachment {
    attachment: 'https://cdn.discordapp.com/attachments/1196091248201695262/1225338378195828806/somename.mp3?ex=6620c44b&is=660e4f4b&hm=72396422a788b37340a4f599dc2b3aafd4f1c4850b4682975c856a37b7368d4c&',
    name: 'somename.mp3',
    id: '1225338378195828806',
    size: 5469184,
    url: 'https://cdn.discordapp.com/attachments/1196091248201695262/1225338378195828806/somename.mp3?ex=6620c44b&is=660e4f4b&hm=72396422a788b37340a4f599dc2b3aafd4f1c4850b4682975c856a37b7368d4c&',
    proxyURL: 'https://media.discordapp.net/attachments/1196091248201695262/1225338378195828806/somename.mp3?ex=6620c44b&is=660e4f4b&hm=72396422a788b37340a4f599dc2b3aafd4f1c4850b4682975c856a37b7368d4c&',
    height: null,
    width: null,
    contentType: 'audio/mpeg',
    description: null,
    ephemeral: false,
    duration: null,
    waveform: null,
    flags: AttachmentFlagsBitField { bitfield: 0 }
  }
}

[MatthewSH]

Decided to test this myself. Was curious if it was some weird thing with like it just pulling the first file extension. Here's my bot code:

const Eris = require("eris");
const dotenv = require("dotenv");
dotenv.config();

const bot = new Eris(process.env.TOKEN);

bot.on("ready", () => {
  console.log("Ready!");
});
bot.on("messageCreate", (msg) => {
  console.log(`${msg.id} > `, {
    filename: msg.attachments[0].filename,
    content_type: msg.attachments[0].content_type,
  });
});
bot.connect();

I created a text file with the content:

Test file.

I duplicated that file 14 times and added/change the extension:

Here are the results:

Ready!
1226925635482423388 >  { filename: 'File_1.txt', content_type: 'text/plain; charset=utf-8' }
1226925650833702983 >  { filename: 'File_2.mp3', content_type: 'audio/mpeg' }
1226925691711393864 >  { filename: 'File_3.mp4', content_type: 'video/mp4' }
1226925706382938353 >  { filename: 'File_4.zip', content_type: 'application/zip' }
1226925717909016679 >  { filename: 'File_5.gz', content_type: undefined }
1226925727526420562 >  { filename: 'File_6.tar.gz', content_type: 'application/x-tar' }
1226925739572592660 >  { filename: 'File_7.jpg', content_type: 'image/jpeg' }
1226925760640454758 >  { filename: 'File_8.exe', content_type: 'application/x-msdos-program' }
1226925775018528878 >  { filename: 'File_9.txt.zip', content_type: 'application/zip' }
1226925788776108173 >  {
  filename: 'File_10.txt.gz',
  content_type: 'text/plain; charset=utf-8'
}
1226925801451163770 >  { filename: 'File_11.txt.tar.gz', content_type: 'application/x-tar' }
1226925813946122250 >  { filename: 'File_12.txt.mp3.gz', content_type: 'audio/mpeg' }
1226925825836974130 >  {
  filename: 'File_13.txt.mp3.tar.gz',
  content_type: 'application/x-tar'
}
1226925835236278354 >  { filename: 'File_14.zip.gz', content_type: 'application/zip' }

Based on this line:

 { filename: 'File_5.gz', content_type: undefined }

It doesn't know what a .gz file is so it's defaulting to the next one up.

According to Mimetype it should be registering .gz and .tgz as appplication/gzip. The .tar.gz should probably also be application/gzip.

---

On a side note, I wanted to test behavior for other "non-existent" file extensions
Looks like the theory is correct:

1226927697427435601 >  { filename: 'File_15.notarealextensio', content_type: undefined }