105 lines
2.7 KiB
CoffeeScript
105 lines
2.7 KiB
CoffeeScript
import configInsec from "../config.insecure.json"
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import { detect as detectBrowser } from 'detect-browser'
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# The following two items are read from `config.insecure.json`
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# These configuration will be load into the frontend, so make sure
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# no sensitive information is leaked through the json
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# Maximum upload size (in bytes)
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MAX_UPLOAD_SIZE = configInsec.max_upload_size
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# File lifetime (deleted after X days)
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# This is only intended for human, any auto-deletion
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# should be configured in your S3 bucket
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FILE_LIFETIME = configInsec.file_lifetime
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# Maximum file name length
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MAX_FILENAME_LENGTH = 255 # bytes
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# Validate content-length header
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validateLength = (req) ->
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(Number.parseInt req.headers.get "content-length") <= MAX_UPLOAD_SIZE
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# Only accept paths like `/paste/:file_name`
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# No further slahses are supported
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getFileName = (url) ->
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url = new URL url
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if url.pathname[0] isnt '/'
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return null
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parts = url.pathname.split '/'
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if parts.length isnt 3
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return null
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if parts[1] isnt 'paste'
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return null
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return parts[2]
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# Generate random file ID
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DICTIONARY = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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ID_LENGTH = 6
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randomID = ->
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[0..ID_LENGTH].map =>
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DICTIONARY[Math.floor Math.random() * DICTIONARY.length]
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.join ''
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# Convert a random ID into file path
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idToPath = (id) ->
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id.split ''
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.join '/'
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# Determine if we show something inline or not
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shouldShowInline = (mime) ->
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isText(mime) or
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mime.startsWith('image/') or
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mime.startsWith('audio/') or
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mime.startsWith('video/')
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isText = (mime) ->
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mime.startsWith('text/') or
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mime == 'application/json' or
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mime == 'application/javascript'
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# Determine if we consider the user a browser or not
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isBrowser = (req) ->
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b = detectBrowser req.headers.get 'user-agent'
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b and (b.name != 'searchbot')
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# Process progress text
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progressText = (progress) ->
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txt = (progress * 100).toFixed(2) + "%"
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if progress < 0.1
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"0" + txt
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else
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txt
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# Convert a file size to human-readable form
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# <https://stackoverflow.com/questions/10420352/converting-file-size-in-bytes-to-human-readable-string>
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humanFileSize = (bytes, si) ->
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thresh = if si then 1000 else 1024
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if Math.abs bytes < thresh
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bytes + " B"
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else
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units = do ->
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if si
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['kB','MB','GB','TB','PB','EB','ZB','YB']
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else
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['KiB','MiB','GiB','TiB','PiB','EiB','ZiB','YiB']
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u = -1
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loop
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bytes /= thresh
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++u
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break if not (Math.abs(bytes) >= thresh and u < units.length - 1)
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bytes.toFixed(1) + ' ' + units[u]
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export {
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getFileName,
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validateLength,
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MAX_UPLOAD_SIZE,
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randomID,
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idToPath,
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shouldShowInline,
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isBrowser,
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isText,
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progressText,
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humanFileSize,
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MAX_FILENAME_LENGTH,
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FILE_LIFETIME
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} |