Ruby-on-rails 如何使用send_file下载文件？
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How to download file with send_file?
提问by user3339562
Can someone enlighten me how can I download file with send_file?
有人可以启发我如何下载文件send_file吗？
I have a file image.jpginside app/assets/images. I've tried this in my controller:
我image.jpg里面有一个文件app/assets/images。我在我的控制器中试过这个：
def download
send_file ("#{Rails.root}/public/images/image.jpg")
end
def download
send_file ("#{Rails.root}/assets/images/image.jpg")
end
def download
send_file ("#{Rails.root}/images/image.jpg")
end
def download
send_file ("/public/images/image.jpg")
end
def download
send_file ("/assets/public/images/image.jpg")
end
def download
send_file ("/assets/images/image.jpg")
end
For each path it says:
对于每条路径，它说：
ActionController::MissingFile in HomeController#download
Cannot read file 'some_path'
What could be a problem here? Thanks!
这里可能有什么问题？谢谢！
回答by Coenwulf
Try:
尝试：
IMAGES_PATH = File.join(Rails.root, "public", "images")
def download
send_file(File.join(IMAGES_PATH, "image.jpg"))
end
回答by Mukesh
In your view =>
<%= link_to "click here to download", signed_feeds_pdf_path(:feed_image_path => feed_image.feedimage.path), target: '_self' %>
In your controller =>
def pdf
file_name = params[:feed_image_path].split('/').last
@filename ="#{Rails.root}/public/uploads/feed_image/feedimage/#{file_name}"
send_file(@filename ,
:type => 'application/pdf/docx/html/htm/doc',
:disposition => 'attachment')
end
soo simple......
回答by corpico
For anyone still looking for an answer, send_data and send_file won't work when responding to ajax calls. Instead, try submitting a form or using <a href=..>to call the controller method and download a file.
对于仍在寻找答案的任何人，在响应 ajax 调用时，send_data 和 send_file 将不起作用。相反，尝试提交表单或使用<a href=..>调用控制器方法并下载文件。
回答by Paritosh Piplewar
well, i suggest you to move your file to public folder. Anyway , do this
好吧，我建议您将文件移动到公共文件夹。无论如何，这样做
send_file(Rails.root.join('app' , 'assets', 'images', 'image.jpg'))
回答by Gurudath BN
We need to specify the mine type so that it will cache.
我们需要指定矿井类型以便缓存。
send_file ("#{Rails.root}/public"+image.image_path), :type => "image/jpeg", :disposition => 'inline'
