Question

我正在制作一个简单的方法来检查网站是否已启动，这是我的Ping模型，其中包含一些我要检查的地址

require 'net/http'

    def self.check
        pings = Ping.all
        pings.each do |p|
          http = Net::HTTP.new(p.address,80)
          response = http.request_get('/')
          if response.message == ( 'OK' or 'Found')
            puts 'up!!'
          end
        end
      end

我只是检查响应消息是“OK”还是“Found”，但我或者语句只检查“OK”。

这也是检查的好方法吗？

Answer 1

response.message == ( 'OK' or 'Found')不会按照您的想法行事。

> ( 'OK' or 'Found')
=> "OK"

这就是为什么它只检查＆＃34; OK＆＃34;。恕我直言，你不应该检查消息，因为这可能会有所不同。检查响应代码中是否存在200或300范围内的任何内容。

只要您不检查很多网站，上述情况就可以了。如果你是，它可能会开始需要一段时间，因为它们是顺序的。

您可能还想添加超时，以便在尝试ping并在20秒内失败时，请考虑将该网站关闭。

此外，我知道有些网站会为无法识别的用户代理返回400错误。所以你通过浏览器看到的内容可能根本不是你的脚本。

Answer 2

As pointed out by @PhilipHallstrom, your mongodb://127.0.0.1:3001/local statement isn't doing what you think it's doing. (if != if a== (b or c) ... Also, there is the issue of case sensitive equality.

Try a Regexp with the case insensitive configuration (the if a == b || a == c at the end):

... although...

I support @PhilipHallstrom's reservations about the code.

Numerical codes would probably be better and application responsiveness should be a factor in the design (I assume you have that one covered)...

I would probably go for:

  response.message.match /^(ok|found)$/i

Rails ping网站并评估Net :: HTTP响应

2 个答案: