1

我已经为此奋斗了一段时间，您的帮助肯定会非常感激。

我已经建立了一种签署 pdf 文档的方法，您可以在此处找到，现在离签署我的文件只有一步之遥。

我想异步执行此操作，但首先我需要了解如何同步执行此操作。

所以我尝试了两种不同的方法，在 post_process 之后：

after_post_process do |receipt|
    if receipt.receipt_file_changed?

      require 'aws-sdk'
          logger.debug("RECEIPT ID: #{self.inspect}")
          file = receipt.receipt_file.queued_for_write[:original]
          s3=AWS::S3.new(
          access_key_id: S3_CONFIG["access_key_id"],
          secret_access_key: S3_CONFIG["secret_access_key"])
          bucket_name = S3_CONFIG["bucket"]

          b = s3.buckets[bucket_name]
          filen = File.basename(file.path)
          outputF = "original/teste.pdf"

          o = b.objects[outputF]
          o.write(file: file.path)

    end
  end

我希望能够将文件发送到类似于/original/1/myfilename.pdf1 将是我的receipt_id 的路径（并且在 post_process 之后为空）。

然后我用 after_save 尝试了一种不同的方法，但是receipt_file.to_file(:original) 不是一个有效的调用......

after_save do |receipt|
    if receipt.receipt_file_changed?

      require 'aws-sdk'
          logger.debug("RECEIPT ID: #{receipt.inspect}")

          s3=AWS::S3.new(
          access_key_id: S3_CONFIG["access_key_id"],
          secret_access_key: S3_CONFIG["secret_access_key"])
          bucket_name = S3_CONFIG["bucket"]

          b = s3.buckets[bucket_name]
          filen = File.basename(receipt_file_file_name)
          outputF = "original/teste.pdf"

          o = b.objects[outputF]
          o.write(file: receipt.receipt_file.to_file(:original))

    end
  end

如何获取文件并将其再次上传回 S3？

编辑

经过一些研究，我阅读了如何从亚马逊加载文件，现在的问题是我的文件内容是空的......我做错了什么？

after_save do |receipt|
    if receipt.receipt_file_changed?

      require 'aws-sdk'

          logger.debug("I was here inside after_save")
          s3=AWS::S3.new(
          access_key_id: S3_CONFIG["access_key_id"],
          secret_access_key: S3_CONFIG["secret_access_key"])
          bucket_name = S3_CONFIG["bucket"]

          b = s3.buckets[bucket_name]
          filen = File.basename(receipt_file_file_name)
          logger.debug("Filename is #{filen}")
          path = "original/#{receipt.id}/#{filen}"
          o = b.objects[path]

          require 'tempfile'

          ext= File.extname(filen)

          file = Tempfile.new([File.basename(filen,ext),ext], :encoding => 'ascii-8bit')
          # streaming download from S3 to a file on disk

          begin
            o.read do |chunk|
                file.write(chunk)
            end
          end
          file.close

          logger.debug("File is #{file.inspect}")

          o.write(file: signPdf(file).path)
          file.unlink

    end
  end
4

1 回答 1

1

将这个问题分成几部分后，我注意到真正的问题是在下载和写入本地磁盘的过程中。所以我问了这个问题，并寻求解决方法。最后得到了保存后的代码：

  after_save do |receipt|
    if receipt.receipt_file_changed? && !@receipt.receipt_file.url[".pdf"] 

      require 'aws-sdk'

          s3=AWS::S3.new(
          access_key_id: S3_CONFIG["access_key_id"],
          secret_access_key: S3_CONFIG["secret_access_key"])
          bucket_name = S3_CONFIG["bucket"]

          b = s3.buckets[bucket_name]
          filen = File.basename(receipt_file_file_name)

          path = "original/#{receipt.id}/#{filen}"
          o = b.objects[path]

          require 'open-uri'
          require 'tempfile'

          ext= File.extname(filen)
          tfile = Tempfile.new([File.basename(filen,ext),ext])
          begin
            open(tfile.path,"wb") do |file|
                file << open(receipt.receipt_file.url,:ssl_verify_mode => OpenSSL::SSL::VERIFY_NONE).read
                o.write(file: signPdf(file).path, :acl => :public_read)
            end
          ensure
            tfile.close!
          end

    end
  end
于 2012-09-10T15:21:02.277 回答