ruby - 如何捕获由对等方重置的错误连接 (Errno::ECONNRESET)

Question

以下代码有时会生成“连接被对等方重置”错误。谁能告诉我如何处理这个异常？

doc = Nokogiri::HTML(open(url))
Connection reset by peer (Errno::ECONNRESET)

Answer 1

要捕获它，就像处理任何其他异常一样:

begin
  doc = Nokogiri::HTML(open(url))
rescue Errno::ECONNRESET => e
  puts "we are handling it!"
end

更有用的模式是尝试几次，然后放弃:

count = 0
begin
  doc = Nokogiri::HTML(open(url))
rescue Errno::ECONNRESET => e
  count += 1
  retry unless count > 10
  puts "tried 10 times and couldn't get #{url}: #{e}
end