Question

以下代码有时会生成“按对等方重置连接”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

要抓住它，就像其他任何例外一样：

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

Answer 2

更有用的模式是使用retries gem：

with_retries(:max_tries => 5, :rescue => [Errno::ECONNRESET], :max_sleep_seconds => 10) do
  doc = Nokogiri::HTML(open(url))
end

如何捕获错误通过对等方重置连接（Errno :: ECONNRESET）

2 个答案: