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练习

REST API

中等

说明

实现一个用于记录 IOU 的 RESTful API。

四个室友经常互相借钱，却总是记不清谁欠谁、欠多少。

你的任务是实现一个简单的 RESTful API，通过 POST 请求接收 IOU，并能通过 GET 请求返回指定的汇总信息。

API 规范

用户对象

{
  "name": "Adam",
  "owes": {
    "Bob": 12.0,
    "Chuck": 4.0,
    "Dan": 9.5
  },
  "owed_by": {
    "Bob": 6.5,
    "Dan": 2.75
  },
  "balance": "<(total owed by other users) - (total owed to other users)>"
}

方法

描述	HTTP 方法	URL	负载格式	无负载时的响应	有负载时的响应
列出用户信息	GET	/users	`{"users":["Adam","Bob"]}`	`{"users":<List of all User objects>}`	`{"users":<List of User objects for <users> (sorted by name)}`
创建用户	POST	/add	`{"user":<name of new user (unique)>}`	N/A	`<User object for new user>`
创建 IOU	POST	/iou	`{"lender":<name of lender>,"borrower":<name of borrower>,"amount":5.25}`	N/A	`{"users":<updated User objects for <lender> and <borrower> (sorted by name)>}`