我已经为此工作了一段时间。尝试了很多不同的东西,我完全被难住了。
我正试图从Amazons3下载一系列mp3文件,然后将它们存储在Heroku的tmp目录中,压缩它们,然后下载文件。
它在本地工作,但当它被推送到Heroku时,zip文件被创建,但已损坏/为空(0字节)。Heroku不会抛出任何错误(请参阅下面的日志文件)。个别文件似乎写得不错。我可以把它们写到tmp然后发送。所以这似乎是创建zip文件的原因?
我真的是heroku的新手,所以即使是关于如何调试的提示也会很有帮助。
任何帮助都将不胜感激!我似乎一辈子都无法解决这个问题。
代码:
def download_album
require 'rubygems'
require 'zip/zip'
if(params.has_key?(:album_url_slug))
@artist = Artist.find_by_url_slug(params[:url_slug])
find_album(@artist,params[:album_url_slug])
else
@album = album
@artist = artist
end
#Sets Directory Path
directory_path = "#{Rails.root}/tmp/#{Process.pid}_mp3"
directory_artist_path = directory_path+"/"+@artist.url_slug
directory = directory_artist_path+"/"+@album.album_url_slug
zipfile = @album.al_name+".zip"
zipfile_name = directory_artist_path+"/"+zipfile
FileUtils.mkdir_p directory
#zips files
Zip::ZipFile.open(zipfile_name, Zip::ZipFile::CREATE) do |zipfile|
#gets mp3's from S3 and writes them into the zip directory
@album.songs.uniq.each do |songs|
#sets the name of the file to be loaded
name = songs.song_name+".mp3"
@song_file = AWS::S3::S3Object.value(songs.s3_id, BUCKET)
# create the file path
path = File.join(directory,name)
File.open(path, 'wb') { |f| f.write(@song_file) }
zipfile.add(name, path)
end
end
send_file(directory_artist_path+"/"+zipfile,
:filename => @album.al_name+".zip")
日志文件:
2012-08-17T02:32:03+00:00 heroku[web.1]: State changed from starting to up
2012-08-17T02:32:04+00:00 app[web.1]: => Booting WEBrick
2012-08-17T02:32:04+00:00 app[web.1]: => Rails 3.0.7 application starting in production on http://0.0.0.0:40764
2012-08-17T02:32:04+00:00 app[web.1]: => Call with -d to detach
2012-08-17T02:32:04+00:00 app[web.1]:
2012-08-17T02:32:04+00:00 app[web.1]: Started GET "/tedkennedy/album/download/testalbum6" for 216.58.66.202 at 2012-08-17 02:32:04 +0000
2012-08-17T02:32:04+00:00 app[web.1]:
2012-08-17T02:32:04+00:00 app[web.1]: => Ctrl-C to shutdown server
2012-08-17T02:32:05+00:00 app[web.1]: Zipping files!
2012-08-17T02:32:06+00:00 app[web.1]: Parameters: {"url_slug"=>"tedkennedy", "album_url_slug"=>"testalbum6"}
2012-08-17T02:32:06+00:00 app[web.1]: Processing by AlbumsController#download_album as HTML
2012-08-17T02:32:06+00:00 app[web.1]: Sent file /app/tmp/tedkennedy/Test album 6.zip (0.1ms)
2012-08-17T02:32:06+00:00 app[web.1]: Completed 200 OK in 1809ms
2012-08-17T02:32:06+00:00 heroku[router]: GET mighty-refuge-6115.herokuapp.com/tedkennedy/album/download/testalbum6 dyno=web.1 queue=0 wait=0ms service=1922ms status=200 bytes=0
经过多次调试。原来发送文件是个问题。。。不确定细节,但更多信息可以在这里找到。
我的解决方案是压缩文件,然后将zip文件存储在s3上,然后从s3下载zip文件。诚然,这不是最优雅的,但在我的情况下,文件只需要压缩一次,然后我就可以从s3下载了。