获取网页时如何捕捉Ruby中的"Error during processing: buffer error"？

Question

我正在使用 Rails 4.2.7 和此代码通过 SOCKS 代理获取网页……

  begin
    …
    res1 = Net::HTTP.SOCKSProxy('127.0.0.1', 50001).start(uri.host, uri.port) do |http|
      puts "launching #{uri}"
      resp = http.get(uri)
      status = resp.code
      content = resp.body
      content_type = resp['content-type']
      content_encoding = resp['content-encoding']
    end
    …
rescue OpenURI::HTTPError => ex
    …
rescue SocketError, Net::OpenTimeout => e
   …

偶尔，我在“rest = http.get(uri)”

行中收到错误

Error during processing: buffer error
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http/response.rb:364:in `finish'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http/response.rb:364:in `finish'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http/response.rb:266:in `ensure in inflater'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http/response.rb:265:in `inflater'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http/response.rb:281:in `read_body_0'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http/response.rb:202:in `read_body'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http.rb:1157:in `block in get'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http.rb:1446:in `block in transport_request'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http/response.rb:163:in `reading_body'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http.rb:1445:in `transport_request'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http.rb:1407:in `request'
/Users/mikeb/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/net/http.rb:1156:in `get'
/Users/mikeb/Documents/workspace/runtrax/app/helpers/webpage_helper.rb:99:in `block in get_content'

如何捕获此错误？你在上面看到了我捕获的错误类型，但我不知道如何捕获我遇到的特定错误。如果发生这样的错误，我的意图是重试。

Answer 1

总是

begin
…
res1 = Net::HTTP.SOCKSProxy('127.0.0.1', 50001).start(uri.host, uri.port) do |http|
  puts "launching #{uri}"
  resp = http.get(uri)
  status = resp.code
  content = resp.body
  content_type = resp['content-type']
  content_encoding = resp['content-encoding']
end
…
rescue OpenURI::HTTPError => ex
…
rescue SocketError, Net::OpenTimeout => e
…
rescue Zlib:BufError => e # 

end

错误从 @inflate.finish 抛出，其中 @inflate = Zlib::Inflate.new(32 + Zlib::MAX_WBITS)。您可能必须要求 zlib 明确捕获错误，请参阅：

获取网页时如何捕捉Ruby中的"Error during processing: buffer error"？

How do I catch the "Error during processing: buffer error" in Ruby when getting a web page?

ruby

buffer

ruby-on-rails

socks

net-http