[英]Building middleware that grabs the IP
I'm trying to write my firsts rack middleware. 我正在尝试编写我的第一个机架中间件。 And need help. 并需要帮助。 I want middleware that find the requestor's IP and if it is in the allowed list of IP continues the request, otherwise it aborts. 我希望中间件找到请求者的IP,如果它在允许的IP列表中继续请求,否则它将中止。
The tricky part is I need this to work on heroku where you can't use request.ip: http://developerhemal.tumblr.com/post/3958107290/client-ip-addresses-on-heroku 棘手的部分是我需要这个在heroku上工作,你不能使用request.ip: http : //developerhemal.tumblr.com/post/3958107290/client-ip-addresses-on-heroku
So I have the following: 所以我有以下内容:
class RestrictIP
def initialize(app, message = "Hello")
@app = app
@message = message
end
def call(env)
dup._call(env)
@ip = env['HTTP_X_REAL_IP'] ||= env['REMOTE_ADDR']
end
def each(&block)
block.call("<!-- #{@ip} -->\n")
@response.each(&block)
end
end
This errors with: 这个错误:
NoMethodError (You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.[]=):
For my first itteration I just want to make sure I can grab and put the requestor's IP on the html doc. 对于我的第一次尝试,我只想确保我可以抓住并将请求者的IP放在html doc上。
Any rack middleware experts out there? 有机架中间件专家吗? Thanks 谢谢
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