如何使用适配器防止法拉第改变大写headers

How to use adapter to prevent Faraday from changing capitalize headers

我正在使用 Faraday 创建一个将与 API 交互的 SDK,我需要发送两个 headers API_SIGNATURE 和 API_REQUEST_TIME,所以这是我创建的内容:

class APIClient
  def initialize(api_key)
    @api_key = api_key
  end

  def get_users
    request.post('/users')
  end

  private

  def request
    Faraday.new(@@BASE_API_URL, headers: headers)
  end

  def headers
    timestamp = Time.now.to_i.to_s
    return {
      'API_SIGNATURE': Digest::MD5.hexdigest(@api_key + timestamp),
      'API_REQUEST_TIME': timestamp
    }
  end
end

出于某种原因,法拉第正在将 API_SIGNATURE 更改为 Api-Signature,将 API_REQUEST_TIME 更改为 Api-Request-Time

我想防止这种情况发生。有人建议使用赞助人:

  def request
    Faraday.new(@@BASE_API_URL, headers: headers) do |faraday|
      faraday.adapter :patron
    end
  end

但这不起作用。出现以下错误:

/Users/me/.rvm/gems/ruby-2.4.9/gems/patron-0.13.3/lib/patron/session.rb:330:in `handle_request': Operation timed out after 1004 milliseconds with 0 out of 0 bytes received (Faraday::TimeoutError)
        from /Users/me/.rvm/gems/ruby-2.4.9/gems/patron-0.13.3/lib/patron/session.rb:330:in `request'
        from /Users/me/.rvm/gems/ruby-2.4.9/gems/faraday-0.17.0/lib/faraday/adapter/patron.rb:29:in `call'
        from /Users/me/.rvm/gems/ruby-2.4.9/gems/faraday-0.17.0/lib/faraday/rack_builder.rb:143:in `build_response'
        from /Users/me/.rvm/gems/ruby-2.4.9/gems/faraday-0.17.0/lib/faraday/connection.rb:387:in `run_request'
        from /Users/me/.rvm/gems/ruby-2.4.9/gems/faraday-0.17.0/lib/faraday/connection.rb:175:in `post'
        from api.rb:32:in `analyze_text'
        from api.rb:38:in `full_analysis'
        from api.rb:65:in `<main>'

谢谢。

=======更新==========

问题减少:

headers = { API_SIGNATURE: '', API_REQUEST_TIME: '' }

conn = Faraday.new('https://api.test.io', headers: headers) do |f|
  f.adapter :patron
end

puts conn.headers

出现这个错误是因为法拉第默认使用Net::HTTP和Net::HTTP changes the case of your header keys. You can read more about this issue at this related question.

您可以使用 https://lostisland.github.io/faraday/adapters/:

中列出的其他可用适配器之一来解决此问题

或需要另一个 gem:

的外部适配器

您对 Patron 的特定实现看起来是正确的,因此请尝试使用其他适配器之一,看看您是否有更好的运气。

更新

我加载了您更新的示例并亲自进行了测试。解决方案是使用字符串化键。您正在使用符号化键。

# symbolized
headers = { API_SIGNATURE: '', API_REQUEST_TIME: '' }
=> {
       :API_SIGNATURE => "",
    :API_REQUEST_TIME => ""
}

这个returns:

puts conn.headers
{"Api-Signature"=>"", "Api-Request-Time"=>"", "User-Agent"=>"Faraday v0.17.0"}

对比:

# stringified
headers = { 'API_SIGNATURE' => '', 'API_REQUEST_TIME' => '' }
=> {
       "API_SIGNATURE" => "",
    "API_REQUEST_TIME" => ""
}

现在你得到了正确的值:

puts conn.headers
{"API_SIGNATURE"=>"", "API_REQUEST_TIME"=>"", "User-Agent"=>"Faraday v0.17.0"}

乍看之下,您的原始示例 似乎 已字符串化但并未(这就是我没听清的原因):

{
  'API_SIGNATURE': '',
  'API_REQUEST_TIME': ''
}
=> {
       :API_SIGNATURE => "",
    :API_REQUEST_TIME => ""
}

在 Ruby 中为哈希键使用冒号会自动使其成为一个符号,即使它是一个带引号的字符串。您需要对字符串化键使用 hash rocket 语法。

解决方案是使用火箭分配而不是冒号。像这样:

headers = {
      'Content-Type': 'application/json',
      'x-api-key': '0000'
    }
...
conn.headers
=> {"Content-type"=>"application/json", "X-api-key"=>"0000", "User-Agent"=>"Faraday v0.17.3"}

VS

headers = {
      'Content-Type' => 'application/json',
      'x-api-key' => '0000'
    }
conn.headers
=> {"Content-Type"=>"application/json", "x-api-key"=>"0000", "User-Agent"=>"Faraday v0.17.3"} 

注意 x 是如何用冒号大写的,而不是如何使用火箭的。