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import * as Bluebird from 'bluebird'
import { createWriteStream, remove } from 'fs-extra'
import * as request from 'request'
import { ACTIVITY_PUB } from '../initializers/constants'
import { processImage } from './image-utils'
import { join } from 'path'
import { logger } from './logger'
import { CONFIG } from '../initializers/config'
function doRequest <T> (
requestOptions: request.CoreOptions & request.UriOptions & { activityPub?: boolean },
bodyKBLimit = 1000 // 1MB
): Bluebird<{ response: request.RequestResponse, body: T }> {
if (requestOptions.activityPub === true) {
if (!Array.isArray(requestOptions.headers)) requestOptions.headers = {}
requestOptions.headers['accept'] = ACTIVITY_PUB.ACCEPT_HEADER
}
return new Bluebird<{ response: request.RequestResponse, body: T }>((res, rej) => {
request(requestOptions, (err, response, body) => err ? rej(err) : res({ response, body }))
.on('data', onRequestDataLengthCheck(bodyKBLimit))
})
}
function doRequestAndSaveToFile (
requestOptions: request.CoreOptions & request.UriOptions,
destPath: string,
bodyKBLimit = 10000 // 10MB
) {
return new Bluebird<void>((res, rej) => {
const file = createWriteStream(destPath)
file.on('finish', () => res())
request(requestOptions)
.on('data', onRequestDataLengthCheck(bodyKBLimit))
.on('error', err => {
file.close()
remove(destPath)
.catch(err => logger.error('Cannot remove %s after request failure.', destPath, { err }))
return rej(err)
})
.pipe(file)
})
}
async function downloadImage (url: string, destDir: string, destName: string, size: { width: number, height: number }) {
const tmpPath = join(CONFIG.STORAGE.TMP_DIR, 'pending-' + destName)
await doRequestAndSaveToFile({ method: 'GET', uri: url }, tmpPath)
const destPath = join(destDir, destName)
await processImage({ path: tmpPath }, destPath, size)
}
// ---------------------------------------------------------------------------
export {
doRequest,
doRequestAndSaveToFile,
downloadImage
}
// ---------------------------------------------------------------------------
// Thanks to https://github.com/request/request/issues/2470#issuecomment-268929907 <3
function onRequestDataLengthCheck (bodyKBLimit: number) {
let bufferLength = 0
const bytesLimit = bodyKBLimit * 1000
return function (chunk) {
bufferLength += chunk.length
if (bufferLength > bytesLimit) {
this.abort()
const error = new Error(`Response was too large - aborted after ${bytesLimit} bytes.`)
this.emit('error', error)
}
}
}
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