Ruby on rails 带Faraday的Rails应用程序：在没有url参数的情况下重构Faraday:：new（）时出现问题

我正在重构由几个微服务组成的Rails应用程序中的一些代码。faraday_中间件gem用于服务之间的通信

我设法用ServiceConnectionHelper模块中对Faraday:：new的单个调用替换了不同帮助文件中对Faraday:：new的几个调用。所有这些被替换的调用都有一个url参数：Faraday.newurl:url

但还有两段非常相似的代码我想去掉。在这些情况下，没有url参数。这是旧的工作代码：

# This code calls the connection function below
def create(resource)
  params = {
    resource_id: resource.to_param,
    version: resource.version,
    file: Faraday::UploadIO.new(resource.file.path, resource.mime_type.to_s, resource.file.original_filename)
  }

  res = connection(resource.authorization).post(foobar_url, params)
  return res.body['id'] if [200, 201].include?(res.status)
  raise UploadError, res.body['error']
end

# connection function
def connection(authorization_header = nil)
  Faraday.new do |conn|
    conn.use FaradayMiddleware::FollowRedirects, limit: 5
    conn.request :multipart
    conn.request :url_encoded
    conn.use FaradayMiddleware::ParseJson, content_type: 'application/json'
    conn.adapter Faraday.default_adapter
    conn.headers['Accept'] = 'application/json'
    conn.headers['Authorization'] = authorization_header unless authorization_header.nil?
  end
end

这就是我想使用的代码。由于create函数中的错误，它无法工作。当我捕捉并记录它时，e.inspect只是

---

在这种情况下，如何使ServiceConnectionHelper正常工作？

与第一个示例相比，请求顺序发生了变化：

连接请求：url\u编码 控制请求：多部分

---

您可以尝试远程conn.request:url\u编码，或者像第一个示例中那样翻转顺序。远射，但似乎是唯一的区别。谢谢，成功了！当我将对Faraday.new的多个调用重构为单个调用时，我必须更改顺序。将其添加为应答，如果它解决了您的问题，您能接受吗。

# Small change only: Te other service's url is computed in the ServiceConnectionHelper module
def create(resource)
  params = {
    resource_id: resource.to_param,
    version: resource.version,
    file: Faraday::UploadIO.new(resource.file.path, resource.mime_type.to_s, resource.file.original_filename)
        }

  # This is were the error happens
  res = connection(resource.authorization).post('/', params)
  return res.body['id'] if [200, 201].include?(res.status)
  raise UploadError, res.body['error']
end

# connection function calls the new helper module now
def connection(authorization_header = nil)
  ServiceConnectionHelper.connection('foobar', authorization_header)
end

# the new module
module ServiceConnectionHelper
  class << self
    def connection(service, oauth_token = nil)

      url = service_url(service)

      Faraday.new(url: url) do |conn|
        conn.use FaradayMiddleware::FollowRedirects, limit: 5
        conn.request :url_encoded
        conn.adapter Faraday.default_adapter
        conn.request :multipart
        conn.use FaradayMiddleware::ParseJson, content_type: 'application/json'
        conn.headers['Accept'] = 'application/json'

        conn.headers['Authorization'] = oauth_token if oauth_token
      end
    end

    private

    def service_url(service)
      url = case service
      when 'foobar' then 'foobar_url_as_a_string'
      # the same for other services  
      end

      url
    end
  end
end