63 lines
1.5 KiB
CoffeeScript
63 lines
1.5 KiB
CoffeeScript
import { detect as detectBrowser } from 'detect-browser'
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# Maimum upload size (in bytes)
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MAX_UPLOAD_SIZE = 10 * 1024 * 1024 # 10 MB
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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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(not b) or (b.name != 'searchbot')
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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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} |