mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-29 16:53:42 -05:00
113 lines
4.4 KiB
CoffeeScript
113 lines
4.4 KiB
CoffeeScript
db = require("./db")
|
|
UrlFetcher = require("./UrlFetcher")
|
|
Settings = require("settings-sharelatex")
|
|
crypto = require("crypto")
|
|
fs = require("fs")
|
|
logger = require "logger-sharelatex"
|
|
async = require "async"
|
|
|
|
module.exports = UrlCache =
|
|
downloadUrlToFile: (project_id, url, destPath, lastModified, callback = (error) ->) ->
|
|
UrlCache._ensureUrlIsInCache project_id, url, lastModified, (error, pathToCachedUrl) =>
|
|
return callback(error) if error?
|
|
UrlCache._copyFile(pathToCachedUrl, destPath, callback)
|
|
|
|
clearProject: (project_id, callback = (error) ->) ->
|
|
UrlCache._findAllUrlsInProject project_id, (error, urls) ->
|
|
logger.log project_id: project_id, url_count: urls.length, "clearing project URLs"
|
|
return callback(error) if error?
|
|
jobs = for url in (urls or [])
|
|
do (url) ->
|
|
(callback) ->
|
|
UrlCache._clearUrlFromCache project_id, url, (error) ->
|
|
if error?
|
|
logger.error err: error, project_id: project_id, url: url, "error clearing project URL"
|
|
callback()
|
|
async.series jobs, callback
|
|
|
|
_ensureUrlIsInCache: (project_id, url, lastModified, callback = (error, pathOnDisk) ->) ->
|
|
if lastModified?
|
|
# MYSQL only stores dates to an accuracy of a second but the incoming lastModified might have milliseconds.
|
|
# So round down to seconds
|
|
lastModified = new Date(Math.floor(lastModified.getTime() / 1000) * 1000)
|
|
UrlCache._doesUrlNeedDownloading project_id, url, lastModified, (error, needsDownloading) =>
|
|
return callback(error) if error?
|
|
if needsDownloading
|
|
logger.log url: url, lastModified: lastModified, "downloading URL"
|
|
UrlFetcher.pipeUrlToFile url, UrlCache._cacheFilePathForUrl(project_id, url), (error) =>
|
|
return callback(error) if error?
|
|
UrlCache._updateOrCreateUrlDetails project_id, url, lastModified, (error) =>
|
|
return callback(error) if error?
|
|
callback null, UrlCache._cacheFilePathForUrl(project_id, url)
|
|
else
|
|
logger.log url: url, lastModified: lastModified, "URL is up to date in cache"
|
|
callback null, UrlCache._cacheFilePathForUrl(project_id, url)
|
|
|
|
_doesUrlNeedDownloading: (project_id, url, lastModified, callback = (error, needsDownloading) ->) ->
|
|
if !lastModified?
|
|
return callback null, true
|
|
|
|
UrlCache._findUrlDetails project_id, url, (error, urlDetails) ->
|
|
return callback(error) if error?
|
|
if !urlDetails? or !urlDetails.lastModified? or urlDetails.lastModified.getTime() < lastModified.getTime()
|
|
return callback null, true
|
|
else
|
|
return callback null, false
|
|
|
|
_cacheFileNameForUrl: (project_id, url) ->
|
|
project_id + ":" + crypto.createHash("md5").update(url).digest("hex")
|
|
|
|
_cacheFilePathForUrl: (project_id, url) ->
|
|
"#{Settings.path.clsiCacheDir}/#{UrlCache._cacheFileNameForUrl(project_id, url)}"
|
|
|
|
_copyFile: (from, to, _callback = (error) ->) ->
|
|
callbackOnce = (error) ->
|
|
_callback(error)
|
|
_callback = () ->
|
|
writeStream = fs.createWriteStream(to)
|
|
readStream = fs.createReadStream(from)
|
|
writeStream.on "error", callbackOnce
|
|
readStream.on "error", callbackOnce
|
|
writeStream.on "close", () -> callbackOnce()
|
|
readStream.pipe(writeStream)
|
|
|
|
_clearUrlFromCache: (project_id, url, callback = (error) ->) ->
|
|
UrlCache._clearUrlDetails project_id, url, (error) ->
|
|
return callback(error) if error?
|
|
UrlCache._deleteUrlCacheFromDisk project_id, url, (error) ->
|
|
return callback(error) if error?
|
|
callback null
|
|
|
|
_deleteUrlCacheFromDisk: (project_id, url, callback = (error) ->) ->
|
|
fs.unlink UrlCache._cacheFilePathForUrl(project_id, url), callback
|
|
|
|
_findUrlDetails: (project_id, url, callback = (error, urlDetails) ->) ->
|
|
db.UrlCache.find(where: { url: url, project_id: project_id })
|
|
.success((urlDetails) -> callback null, urlDetails)
|
|
.error callback
|
|
|
|
_updateOrCreateUrlDetails: (project_id, url, lastModified, callback = (error) ->) ->
|
|
db.UrlCache.findOrCreate(url: url, project_id: project_id)
|
|
.success(
|
|
(urlDetails) ->
|
|
urlDetails.updateAttributes(lastModified: lastModified)
|
|
.success(() -> callback())
|
|
.error(callback)
|
|
)
|
|
.error callback
|
|
|
|
_clearUrlDetails: (project_id, url, callback = (error) ->) ->
|
|
db.UrlCache.destroy(url: url, project_id: project_id)
|
|
.success(() -> callback null)
|
|
.error callback
|
|
|
|
_findAllUrlsInProject: (project_id, callback = (error, urls) ->) ->
|
|
db.UrlCache.findAll(where: { project_id: project_id })
|
|
.success(
|
|
(urlEntries) ->
|
|
callback null, urlEntries.map((entry) -> entry.url)
|
|
)
|
|
.error callback
|
|
|
|
|
|
|