overleaf/services/filestore/app/coffee/LocalFileWriter.coffee

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fs = require("fs")
uuid = require('node-uuid')
path = require("path")
_ = require("underscore")
logger = require("logger-sharelatex")
metrics = require("metrics-sharelatex")
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Settings = require("settings-sharelatex")
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module.exports =
writeStream: (stream, key, callback)->
timer = new metrics.Timer("writingFile")
callback = _.once callback
fsPath = @_getPath(key)
logger.log fsPath:fsPath, "writing file locally"
writeStream = fs.createWriteStream(fsPath)
stream.pipe writeStream
writeStream.on "finish", ->
timer.done()
logger.log fsPath:fsPath, "finished writing file locally"
callback(null, fsPath)
writeStream.on "error", (err)->
logger.err err:err, fsPath:fsPath, "problem writing file locally, with write stream"
callback err
stream.on "error", (err)->
logger.log err:err, fsPath:fsPath, "problem writing file locally, with read stream"
callback err
deleteFile: (fsPath, callback)->
logger.log fsPath:fsPath, "removing local temp file"
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fs.unlink fsPath, callback
_getPath : (key)->
if !key?
key = uuid.v1()
key = key.replace(/\//g,"-")
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path.join(Settings.path.uploadFolder, key)