Ruby-on-rails 如何使用 HTTParty 处理错误？
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How can I handle errors with HTTParty?
提问by preethinarayan
I'm working on a Rails application using HTTParty to make HTTP requests. How can I handle HTTP errors with HTTParty? Specifically, I need to catch HTTP 502 & 503 and other errors like connection refused and timeout errors.
我正在开发一个使用 HTTParty 发出 HTTP 请求的 Rails 应用程序。如何使用 HTTParty 处理 HTTP 错误？具体来说，我需要捕获 HTTP 502 和 503 以及其他错误，例如连接被拒绝和超时错误。
回答by Jordan Running
An instance of HTTParty::Responsehas a codeattribute which contains the status code of the HTTP response. It's given as an integer. So, something like this:
HTTParty::Response的实例有一个code属性，其中包含 HTTP 响应的状态代码。它以整数形式给出。所以，像这样：
response = HTTParty.get('http://twitter.com/statuses/public_timeline.json')
case response.code
when 200
puts "All good!"
when 404
puts "O noes not found!"
when 500...600
puts "ZOMG ERROR #{response.code}"
end
回答by mklb
This answer addresses connection failures.If a URL isn′t found the status code won′t help you. Rescue it like this:
此答案解决了连接失败问题。如果未找到 URL，状态代码将无济于事。像这样拯救它：
begin
HTTParty.get('http://google.com')
rescue HTTParty::Error
# don′t do anything / whatever
rescue StandardError
# rescue instances of StandardError,
# i.e. Timeout::Error, SocketError etc
end
For more information see: this github issue
有关更多信息，请参阅：此 github 问题
回答by Artur Beljajev
You can also use such handy predicate methods as success?or bad_gateway?in this way:
您还可以使用这样方便的谓词方法success?或bad_gateway?以这种方式：
response = HTTParty.post(uri, options)
p response.success?
Full list of possible responses can be found under Rack::Utils::SYMBOL_TO_STATUS_CODEconstant.
可以在Rack::Utils::SYMBOL_TO_STATUS_CODE常量下找到可能响应的完整列表。
