| 1234567891011121314151617181920212223242526272829303132333435 |
- crypto = require "crypto"
- logger = require("logger-sharelatex")
- fs = require("fs")
- _ = require("underscore")
- module.exports = FileHashManager =
- computeHash: (filePath, callback = (error, hashValue) ->) ->
- callback = _.once(callback) # avoid double callbacks
- # taken from v1/history/storage/lib/blob_hash.js
- getGitBlobHeader = (byteLength) ->
- return 'blob ' + byteLength + '\x00'
- getByteLengthOfFile = (cb) ->
- fs.stat filePath, (err, stats) ->
- return cb(err) if err?
- cb(null, stats.size)
- getByteLengthOfFile (err, byteLength) ->
- return callback(err) if err?
- input = fs.createReadStream(filePath)
- input.on 'error', (err) ->
- logger.err {filePath: filePath, err:err}, "error opening file in computeHash"
- return callback(err)
- hash = crypto.createHash("sha1")
- hash.setEncoding('hex')
- hash.update(getGitBlobHeader(byteLength))
- hash.on 'readable', () ->
- result = hash.read()
- if result?
- callback(null, result.toString('hex'))
- input.pipe(hash)
|
