获取Errno :: ENOENT：没有这样的文件或目录@ rb_sysopen当试图在Roo gem（Ruby on rails）中打开远程文件url时

Question

当试图打开文件以导入数据时，我在AWS s3存储中存储了一个文件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 

我甚至想这也

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

获得以下错误日志袋鼠宝石，它提高以下错误

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

最后下面的代码是为我工作。

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

Answer 2

要打开的URL，你应该首先要求open-uri库：

require 'open-uri' 

见例如：

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