獲取Errno :: ENOENT：沒有這樣的文件或目錄@ rb_sysopen當試圖在Roo gem（Ruby on rails）中打開遠程文件url時

Question

當試圖打開文件以導入數據時，我在AWS s3存儲中存儲了一個文件Errno::ENOENT: No such file or directory @ rb_sysopen

def self.import(file, user_id) 
     imported_file = ImportedFile.find(file) 
     spreadsheet = Roo::Spreadsheet.open(open(imported_file.file_url), extension: :csv) 
     spreadsheet = Roo::Spreadsheet.open(imported_file.file) 
     header = spreadsheet.row(1)//raising error here 
end 

我甚至想這也

spreadsheet = Roo::Spreadsheet.open(imported_file.file_url) 

獲得以下錯誤日誌袋鼠寶石，它提高以下錯誤

Errno::ENOENT: No such file or directory @ rb_sysopen - /uploads/imported_files/7a6f0463-b3cd-48f8-a579-bc27951242fe/13c96e3e-d3f3-4ed8-8d9a-b9ea03c0cc8c.csv 

Answer 1

最後下面的代碼是爲我工作。

spreadsheet = Roo::Spreadsheet.open(open(imported_file.file_url), extension: File.extname(imported_file.file_url).gsub('.','').to_sym) rescue nil 

Answer 2

要打開的URL，你應該首先要求open-uri庫：

require 'open-uri' 

見例如：

open('http://example.com/') 
# throws Errno::ENOENT: No such file or directory @ rb_sysopen - http://example.com/ 

require 'open-uri' 
open('http://example.com/') 
# opens the website