Telegram Bot - How to upload local files with absolute/ dynamic URL

Question

I'm trying to send photos through telegram bot using 'sendPhoto' method with relative url (Image at file level). I'm not using any library, here is my call function:

let axiosImage = async (chatId, caption, res) => {
try {
    await axios.post(`${TELEGRAM_API}/sendPhoto`,
        {
            headers:{'Content-Type': 'multipart/form-data'}
        },{
            body: {
                'chat_id': chatId,
                'caption': caption,
                'photo': './image.jpeg'
            }
        })
    return res.send()
} catch (e) {
    console.log('\nSTATUS RESPONSE: ' + e.response.status)
    console.log('\nMESSAGE RESPONSE: ' + e.response.statusText)
}}

but I'm getting this message back: {"ok":false,"error_code":400,"description":"Bad Request: there is no photo in the request"}

I tried with a web url and it sends normally.

What could I be missing? Do I have to upload the local images in some repository?

Answer 1

I had a similar issue recently, I managed to solve the problem using form-data npm package and built-in fs module.

const FormData = require('form-data');
const fs = require('fs');

const axiosImage = async(chatId, caption, res) => {
    try {
        const formData = new FormData();
        
        formData.append('chat_id', chatId);
        formData.append('photo', fs.createReadStream('./image.jpeg'));
        formData.append('caption', caption);
    
        const response = await axios.post(`${TELEGRAM_API}/sendPhoto`, formData, {
            headers: formData.getHeaders(),
        });

        return res.send();
    } catch (err) {
        console.log(err);
    }
}