如何使用ruby on rails将excel文件上传到S3 bucket中？

Question

在我们的rails 6项目中，我想将excel文件上传到S3 bucket中，并将文件链接发送至电子邮件，并从电子邮件中提供下载xls功能。请帮助我。

我使用下面的代码生成了excel文件，并在我们的项目中设置了S3配置。

 xlsx = GenerateSpreadsheetService.new(all_data, file_name).call

现在我的问题是，如何将上述excel文件上传到S3 bucket，并将文件链接发送至电子邮件，并提供从电子邮件下载xls的功能。

class ImportCsvDataJob < ApplicationJob
  queue_as :default


  def perform(file_name, column)
    begin
      keywords = []
      all_data = []

      file_path = get_file_path(file_name)
      spreadsheet = Roo::Excelx.new(file_path)
      (2..spreadsheet.last_row).each do |i|
        keywords << {"language_code": "en", "location_code": 2840, "keyword": "allintitle: #{spreadsheet.row(i)}"}
      end

      response = GetTaskService.new(keywords).call 
      response["tasks"].map{|task|
        keyword = task["data"]["keyword"].gsub('allintitle: ','')
        result = GetTaskService.new.get_values(task["id"])
        all_data << {keyword: keyword.to_s, value: result["tasks"][0]["result"][0]["se_results_count"]}
      } 
      ## Create records  
      CsvImport.create(all_data)
      ## Generate excel file
      xlsx = GenerateSpreadsheetService.new(all_data, file_name).call
      ## send email
      SendEmailJob.perform_now(xlsx, file_name) 
      ## remove temp storage file after processing
      File.delete(Rails.root + "public/spreadsheets/#{file_name}")
    rescue Exception => e
      Rails.logger.info "--error-----#{e.message}--"
    end
  end
end

class GenerateSpreadsheetService
  def initialize(data = [], file_name)
    @data = data
    @file_name = file_name
  end

  def call
    ActionController::Base.new().render_to_string(template: "csv_imports/template.xlsx.axlsx", layout: false, formats: [:axlsx], locals: {:data => @data})
  end
end

class SendEmailJob < ApplicationJob
  queue_as :default

  def perform(xlsx, file_name)
    SendEmailService.new(xlsx, file_name).call
  end
end

class SendEmailService
    def initialize(xlsx, file_name)
        @xlsx = xlsx
        @email = "[email protected]"
        @subject = "excel file"
        @file_name = file_name
    end

    def call
        KeywordMailer.send_csv(@email, @subject, @xlsx, @file_name).deliver_now!
    end
end

Answer 1

https:/docs.aws.amazon.comAmazonS3latestdevUploadObjSingleOpRuby.html。

亚马逊给你答案。

require 'aws-sdk-s3'
s3 = Aws::S3::Resource.new(region:'us-west-2')
obj = s3.bucket('bucket-name').object('key')
obj.upload_file('/path/to/source/file')

你只需要设置区域，桶名，然后最后一行的文件路径 就是你存储这个xls文件的地方。 看起来你是用一些随机的文件名把它存储在publicspreadsheets。

Answer 2

我是如何解决这个问题的？

1. 生成excel表

   time = Time.zone.now.strftime("%Y%m%d%H%M%S")
   xlsx = GenerateSpreadsheetService.new(all_data, file_name).call

2. 创建一个空目录

   path = Tempfile.new("data_#{time}.xlsx").path

3. 将excel文件写入此目录

   file = File.open(path,"wb") {|f| f.write(xlsx) }
   s3 = Aws::S3::Resource.new(region: APP_CONFIG["s3_region"], credentials: Aws::Credentials.new(APP_CONFIG["s3_access_key"], APP_CONFIG["s3_secret_key"]))
   obj = s3.bucket(APP_CONFIG["s3_bucket"]).object("data_#{time}.xlsx")
   obj.upload_file(path)
   presigned_url = obj.presigned_url(:put, bucket: APP_CONFIG["s3_bucket"], key: "data_#{time}.xlsx", expires_in: 604800)

4. 保存 public_url 和 presigned_url

   FileUrl.create(key: "data_#{time}.xlsx", file_public_url: obj.public_url, file_presigned_url: presigned_url) if presigned_url.present?