使用 eventmachine 发送哈希

发布于 2024-09-19 19:33:16 字数 498 浏览 4 评论 0原文

我想将填充有数据的哈希从 EventMachine 客户端发送到服务器。问题是服务器 receive_date 方法只打印一个字符串。

服务器：

  def receive_data(data)
    send_data("Ready")
    puts data[:total]
  end

客户端：

def receive_data(data)
  send_data( get_memory() )
end

def get_memory
  sigar = Sigar.new
  mem = sigar.mem
  swap = sigar.swap
  memory = { :total => (mem.total / 1024), :cat => "kwiki", :mouse => "squeaky" }
end

这一行： put data[:total]

仅打印 nil

原文

I want to send a hash populated with data from a EventMachine client to a server. The problem is that the server receive_date method just prints a string.

The server:

  def receive_data(data)
    send_data("Ready")
    puts data[:total]
  end

The client:

def receive_data(data)
  send_data( get_memory() )
end

def get_memory
  sigar = Sigar.new
  mem = sigar.mem
  swap = sigar.swap
  memory = { :total => (mem.total / 1024), :cat => "kwiki", :mouse => "squeaky" }
end

This line: puts data[:total]

prints only nil

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分分钟 2024-09-26 19:33:16

为什么不在发送之前将 Hash 转换为 JSON 字符串，并在服务器收到它时将其转换回 Hash？

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就是爱搞怪 2024-09-26 19:33:16

您需要序列化通过线路发送的数据。换句话说，通常所有内容都以纯 ascii 格式输出。在您的情况下，您可以使用 YAML 进行序列化，因为您的内存哈希仅包含 ascii 字符。

客户端：

require 'yaml'

def receive_data(data)
  send_data(get_memory().to_yaml)
end

服务器：

require 'yaml'

def receive_data(data)
  puts YAML.load(data)
end

当然还有其他序列化方法，例如 JSON 等。

You need to serialize the data that you send over the wire. In other words, normally everything is outputted as plain ascii. In your case you could use YAML for serialization, since you memory hash only contains ascii chars.

client:

require 'yaml'

def receive_data(data)
  send_data(get_memory().to_yaml)
end

server:

require 'yaml'

def receive_data(data)
  puts YAML.load(data)
end

Of course there are other serialization methods like JSON, or something.

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一腔孤↑勇 2024-09-26 19:33:16

嘿，rtaconni，
如果您想从自定义对象发送数据，您必须做一些不同的事情。您可以将 DRbUndumped 模块包含在您的类中，以使您的类成为可封送的。

您可以构建该模块并将其包含在您的类中。
http://www.ruby-doc.org /stdlib/libdoc/drb/rdoc/classes/DRb/DRbUndumped.html

例如。


require 'drb'
include DRbUndumped

西加尔级
  def 初始化(*args)
  末端

缺陷
  结束

结束

现在您可以使用 Marshal.dump(object) 和 Marshal.load(object)，只要接收者文件/进程也共享（例如，需要“sigar”），那么它将能够使用您的 Ruby 对象，而无需必须对对象进行昂贵的转换才能来回发送它。

Marshal.load()、Marshal.dump() 几乎适用于所有对象，在某些特殊情况下，套接字会遇到异常。

快乐黑客。

Hey rtaconni,
You have to do things a little different if you want to send the data from a custom object. There is the DRbUndumped module you can include in your class to have your class become Marshalable.

You can build the module and include it with your class.
http://www.ruby-doc.org/stdlib/libdoc/drb/rdoc/classes/DRb/DRbUndumped.html

ex.


require 'drb'
include DRbUndumped

class Sigar
  def initialize(*args)
  end

def ect
  end

end

Now you can use Marshal.dump(object), and Marshal.load(object), and as long as the recipient file / process also shared (eg. require 'sigar') then it will be able to work with your Ruby object without having to do costly transformations to the Object just to send it back and forth.

Marshal.load(), Marshal.dump() work with almost all Objects, there are some special cases with Sockets where Marshaling runs into exceptions.

Happy Hacking.

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