Question

我已经打了一段时间了，你的帮助肯定会非常值得赞赏。

我已经建立了一种签署pdf文档的方法，您可以找到here，现在离签名文件只有一步之遥。

我想以异步方式执行此操作，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，post post_process：

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/original/1/myfilename.pdf的路径，其中1将是我的receipt_id（并且在post post_process之后为null）。

然后我尝试了一种与after_save不同的方法，但receipt_file.to_file（：original）不是有效的调用...

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重新上传回S3？

修改

经过一些研究后，我阅读了如何从Amazon加载文件，现在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

Answer 1

将这个问题分成几部分之后，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question，并找到了解决方法。最后获得了以后保存的代码：

  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

从after_post_process或after_save获取id，bin或者bin

1 个答案: