使用Net/http发布JSON格式的Ruby数据

我有一个ruby文件：

require 'net/http'
require 'json'
require 'uri'
    #test data

newAcctJson ='{
  "type": "Credit Card",
  "nickname": "MoreTesting",
  "rewards": 2,
  "balance": 50
}'

    #creates a new account
def createAcct(custID, json)
    url = "http://api.reimaginebanking.com:80/customers/#{custID}/accounts?key=#{APIkey}"
    uri = URI.parse(url)
    http = Net::HTTP.new(uri.host, uri.port)
    myHash = JSON.parse(json)
    resp = Net::HTTP.post_form(uri, myHash)
    puts(resp.body)
end

---

它尝试创建一个新帐户。但是我得到了

code:400，帐户中的字段无效

。我独立地测试了数据，所以我（相对地）确定json本身的格式没有错误；问题在于试图以

post\u表单所需的哈希格式提交数据。有人知道如何使用ruby直接发布json数据而不首先转换为哈希吗？
创建如下请求对象：

request = Net::HTTP::Post.new(uri.request_uri, 
          'Content-Type' => 'application/json')
request.body = newAcctJson
resp = http.request(request)

要结合问题代码和@DVG的优秀答案：

require 'net/http'
#require 'json' - not needed for the example
require 'uri'

#test data
newAcctJson ='{
  "type": "Credit Card",
  "nickname": "MoreTesting",
  "rewards": 2,
  "balance": 50
}'

#creates a new account
def createAcct(custID, json)
  url = "http://api.reimaginebanking.com:80/customers/#{custID}/accounts?key=#{APIkey}"
  uri = URI.parse(url)
  http = Net::HTTP.new(uri.host, uri.port)

  request = Net::HTTP::Post.new(
    uri.request_uri, 
    'Content-Type' => 'application/json'
  )
  request.body = newAcctJson

  response = http.request(request)
  puts(response.body)
end

http
变量来自哪里？@mr.musicman-问题显示http=Net:：http.new（uri.host，uri.port）

可能重复的