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我正在使用 ruby​​ coinbase-exchange gem，我通过将代码复制并粘贴到 irb 来执行代码。

这只发生在我将它作为 websocket 运行时——当我自己执行代码时，没有套接字，它工作正常。

当下面的代码执行时，

accounts = Array.new(2, Array.new)
rest_api.accounts do |resp|
  accounts = resp
end

产生此错误：

Coinbase::Exchange::APIError: GET https://api.exchange.coinbase.com/accounts?: connection closed by server
from /usr/local/lib/ruby/gems/2.3.0/gems/coinbase-exchange-0.1.2/lib/coinbase/exchange/adapters/em_http.rb:59:in `block in http_verb'
from /usr/local/lib/ruby/gems/2.3.0/gems/eventmachine-1.2.0.1/lib/em/deferrable.rb:158:in `set_deferred_status'
from /usr/local/lib/ruby/gems/2.3.0/gems/eventmachine-1.2.0.1/lib/em/deferrable.rb:198:in `fail'
from /usr/local/lib/ruby/gems/2.3.0/gems/em-http-request-1.1.5/lib/em-http/client.rb:123:in `on_error'
from /usr/local/lib/ruby/gems/2.3.0/gems/em-http-request-1.1.5/lib/em-http/client.rb:117:in `unbind'
from /usr/local/lib/ruby/gems/2.3.0/gems/em-http-request-1.1.5/lib/em-http/http_connection.rb:205:in `block in unbind'
from /usr/local/lib/ruby/gems/2.3.0/gems/em-http-request-1.1.5/lib/em-http/http_connection.rb:205:in `map'
from /usr/local/lib/ruby/gems/2.3.0/gems/em-http-request-1.1.5/lib/em-http/http_connection.rb:205:in `unbind'
from /usr/local/lib/ruby/gems/2.3.0/gems/em-http-request-1.1.5/lib/em-http/http_connection.rb:31:in `unbind'
from /usr/local/lib/ruby/gems/2.3.0/gems/eventmachine-1.2.0.1/lib/eventmachine.rb:1481:in `event_callback'
from /usr/local/lib/ruby/gems/2.3.0/gems/eventmachine-1.2.0.1/lib/eventmachine.rb:202:in `release_machine'
from /usr/local/lib/ruby/gems/2.3.0/gems/eventmachine-1.2.0.1/lib/eventmachine.rb:202:in `ensure in run'
from /usr/local/lib/ruby/gems/2.3.0/gems/eventmachine-1.2.0.1/lib/eventmachine.rb:205:in `run'
from (irb):79
from /usr/local/bin/irb:11:in `<main>'

这里有什么问题？我该如何解决？

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