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index.js
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var request = require('superagent')
var exec = require('child_process').exec
var fs = require('fs')
var gif = 'https://pm25.lass-net.org/LASS/assets/IDW_gif/Taiwan_latest_thumbnail.gif'
var HOST = process.env.HOST
var TOKEN = process.env.TOKEN
exec(`curl ${gif} > a.gif`, function (err) {
if (err) throw err
exec(`convert -limit memory 1mb -coalesce a.gif zz%03d.png`, function (err) {
if (err) throw err
fs.readdir('.', function (err, files) {
if (err) throw err
var lastFrame = files.sort().slice(-1)[0]
uploadMedia(lastFrame, function (err, mediaID) {
if (err) throw err
post(mediaID, function (err) {
if (err) throw err
// remove temp frames
fs.readdir('.', function (err, files) {
if (err) throw err
files.forEach(f => {
if (f.startsWith('zz')) fs.unlinkSync(f)
})
})
})
})
})
})
})
function uploadMedia (filename, cb) {
request
.post(`${HOST}/api/v1/media`)
.query({ access_token: TOKEN })
.type('form')
.attach('file', filename)
.end(function (err, res) {
if (err) return cb(err)
cb(null, res.body.id)
})
}
function post (mediaID, cb) {
request
.post(`${HOST}/api/v1/statuses`)
.query({ access_token: TOKEN })
.type('form')
.send({ status: '空污情報', 'media_ids[]': mediaID })
.end(cb)
}