我有一封信座“Heroku”。 照片取决于一些使用袖珍听众的反馈。 听众每秒一行XML。 一旦我发现听众的卷宗末信号,我将文件上载到亚马孙S3服务器。 但是,在收到档案信号之前,能否将档案内容作为Heroku的临时档案加以保存?
您可使用http://devcenter.heroku.com/articles/read- only-filesystem”rel=“noreferer”#{RAILS_ROOT}/tmp/code>. .
Aspen & Bamboo
[...]
There are two directories that are writeable:./tmpand./log(under your application root).
[...]Cedar
Cedar offers an ephemeral writeable filesystem. You can write out to disk anywhere you would like. Your changes will be lost on dyno restart and spin-up.
<代码>RAILS_ROOT适用于旧铁路版本,Rails.root适用于新版本。
当然,你不能依靠任何在各种要求中幸存的东西,也不能保证你甚至会与同一死者合作。
只要你坚持同一程序或要求,Rails.root.join(tmp )就应当使用。 如果你需要临时数据,以在各种要求或过程中生存,那么你会更好地利用其他东西(如MongoDB或PogreSQL)作为收集贵国数据的基础。
由于Benjaminganger,请上签<代码>RAILS_ROOT至Rails.root的改动。
The documentation on Heroku s read-only file system explains that you can use #{RAILS_ROOT}/tmp but doesn t give any examples for generating a temporary filename. This will guarantee uniqueness of the filename:
prefix = mydata
suffix = .xml
Tempfile.new [prefix, suffix], "#{Rails.root}/tmp"
请注意,“没有保证该档案将存放在随后的要求下(尽管可能如此),因此不应用于任何类型的永久储存。
Try writing to root with
f = File.new("filename.txt", w )
f << "hi there"
f.close
Dir.entries(Dir.pwd) # see your newly created file
或<代码>/tmp iii
f = File.new("tmp/filename.txt", w )
f << "hi there"
f.close
Dir.entries(Dir.pwd.to_s + ("/tmp"))
各位将看到你在两起案件中的新档案。
另外,还尝试运行<代码>okuherstart<>/code>,看你新创建的档案消失! 预计情况是,由于 her库的储存是短暂的(如果 app重新启用,将予以删除),因此对临时储存的依赖程度不超过(每件)临时储存量。
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