使用 Ruby on Rails 将 JSON/XML 数据发布到 Web 服务 [英] Using Ruby on Rails to POST JSON/XML data to a web service

问题描述

我使用 Java 中的 Spring 框架构建了一个 Web 服务，并让它在本地主机上的 tc 服务器上运行.我使用 curl 测试了 Web 服务并且它工作正常.换句话说，此 curl 命令将向 Web 服务发布新事务.

I built a web service in using Spring framework in Java and have it run on a tc server on localhost. I tested the web service using curl and it works. In other words, this curl command will post a new transaction to the web service.

curl -X POST -H 'Accept:application/json' -H 'Content-Type: application/json' http://localhost:8080/BarcodePayment/transactions/ --data '{"id":5,"amount":5.0,"paid":true}'

现在，我正在使用 RoR 构建一个 Web 应用程序，并且想做类似的事情.我怎样才能建立它?基本上，RoR Web 应用程序将是一个向 Web 服务发送消息的客户端.

Now, I am building a web app using RoR and would like to do something similar. How can I build that? Basically, the RoR web app will be a client that posts to the web service.

搜索 SO 和网络，我找到了一些有用的链接，但我无法让它工作.例如，从这个post，他/她使用 net/http.

Searching SO and the web, I found some helpful links but I cannot get it to work. For example, from this post, he/she uses net/http.

我试过了，但没有用.在我的控制器中，我有

I tried but it doesn't work. In my controller, I have

  require 'net/http'
  require "uri"

 def post_webservice
      @transaction = Transaction.find(params[:id])
      @transaction.update_attribute(:checkout_started, true);

      # do a post service to localhost:8080/BarcodePayment/transactions
      # use net/http
      url = URI.parse('http://localhost:8080/BarcodePayment/transactions/')
      response = Net::HTTP::Post.new(url_path)
      request.content_type = 'application/json'
      request.body = '{"id":5,"amount":5.0,"paid":true}'
      response = Net::HTTP.start(url.host, url.port) {|http| http.request(request) }

      assert_equal '201 Created', response.get_fields('Status')[0]
    end

返回错误:

undefined local variable or method `url_path' for #<TransactionsController:0x0000010287ed28>

我使用的示例代码来自这里

我不依赖于 net/http，我不介意使用其他工具，只要我可以轻松完成相同的任务.

I am not attached to net/http and I don't mind using other tools as long as I can accomplish the same task easily.

非常感谢！

推荐答案

url = URI.parse('http://localhost:8080/BarcodePayment/transactions/')
response = Net::HTTP::Post.new(url_path)

您的问题正是解释器告诉您的问题:url_path 未声明.您想要的是对您在上一行中声明的 url 变量调用 #path 方法.

Your problem is exactly what the interpreter told you it is: url_path is undeclared. what you want is to call the #path method on the url variable you declared in the previous line.

url = URI.parse('http://localhost:8080/BarcodePayment/transactions/')
response = Net::HTTP::Post.new(url.path)

应该可以.

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