Question

我正在使用wicked_pdf生成pdf文件，并希望将其上传到s3存储桶，因为heroku不能公开保存。但是面临问题如何上传或如何在保存路径中提供s3存储桶路径。

这是我的控制器代码： -

pdf = render_to_string :pdf => "user_detail"

# then save to a file
save_path = Rails.root.join('pdfs','filename.pdf')
File.open(save_path, 'wb') do |file|
  file << pdf
end

Answer 1

您可以使用aws-sdk gem。

gem会在您的环境文件中查找AWS_ACCESS_KEY_ID，AWS_SECRET_ACCESS_KEY和AWS_REGION，因此您需要添加这些内容。您可以为存在存储桶的区域创建S3资源，并使用唯一的文件名创建对象，并调用upload_file，如下所示。

require 'aws-sdk'

file_name = 'your-file.pdf'

s3 = Aws::S3::Resource.new(region: ENV['AWS_REGION'])
obj = s3.bucket('your-s3-bucket-name').object(file_name)
puts "Uploading file #{file_name}"
obj.upload_file("/Users/username/path/to/#{file_name}")
puts "Done"

Answer 2

除了Anurag Aryan回答，您还可以使用Aws::S3::Object#put。如果对象是字符串或不是磁盘上的文件的IO对象，则此选项非常有用：

filename = 'filename.pdf'
pdf = render_to_string :pdf => "user_detail"
s3 = Aws::S3::Resource.new(region: ENV['AWS_REGION'])
obj = s3.bucket('your-s3-bucket-name').object(filename)

# upload pdf data as a string
obj.put(body: pdf)

# or as an IO object
save_path = Rails.root.join('pdfs', filename)
File.open(save_path, 'wb') do |file|
  file << pdf
  obj.put(body: file)
end

这是an example of file uploading on docs.aws.amazon.com

Answer 3

此S3 gem可以让您执行此pdf上传。需要传递存储桶名称，访问密钥ID，访问密钥密码。

filename = "invoice.pdf"
# render your pdf file
pdf = render_to_string(:pdf => filename, template: "invoice.html.erb")
# S3 upload Code goes here
service = S3::Service.new(:access_key_id => ENV['AWS_ACCESS_KEY_ID'], :secret_access_key => ENV['AWS_SECRET_ACCESS_KEY'])
bucket = service.buckets.find(ENV['S3_BUCKET_NAME'])
file = bucket.objects.build("invoices/#{filename}")
file.content = pdf
file.content_type = "application/pdf"
file.acl = :public_read
file.save
# Done, use the URL below as needed
s3url = "http://#{ENV['S3_BUCKET_NAME']}.s3.amazonaws.com/invoices/#{filename}"

如何将控制器中生成的pdf文件上传到S3存储桶

3 个答案: