如何在 ruby 中的 Faraday 客户端每次重试时更改 Auth header？

Question

我的 Rails 应用程序中定义了一个 HTTP get 方法，类似这样。我想知道如何在每次重试时更新 headers 中的新 OAuth 令牌？

  def configure(service_base_uri, auth_header)
    Faraday.new(service_base_uri) do |faraday|
      faraday.headers['Authorization'] = auth_header
      faraday.request :retry, max: 5, interval: 0.05
      faraday.adapter Faraday.default_adapter
    end
  end

  def get(service_base_uri, path, error_message, params = {})
    auth_header = auth_token_generator(service_base_uri, path)

    connection = configure(service_base_uri, auth_header, headers)
    response = connection.get(parsed_uri.path, params)
    return JSON.parse(response.body)
  end

  def auth_token_generator(service_base_uri, path)
    # Some code
  end

Answer 1

Faraday::Request::Retry class 允许一个名为 retry_block 的参数。

retry_block - block that is executed after every retry. Request environment, middleware options, current number of retries and the exception is passed to the block as parameters.

由于环境被传递到块中，您可以使用它来修改下一个请求的headers：

 Faraday.new(...) do |faraday|
   faraday.headers['Authorization'] = auth_header
   faraday.request :retry, ...,
     retry_block: proc { |env, opts, retries, exception|
       env.request_headers['Authorization'] = "Hello #{retries}"
     }
 end

如何在 ruby 中的 Faraday 客户端每次重试时更改 Auth header？

How to change the Auth header in every retry in Faraday client in ruby?

ruby

ruby-on-rails

faraday-oauth

faraday