jsonplus

安装

npm install --save-dev jsonplus

用法非常简单

var jsonplus = require('jsonplus');

// Parse like you would with JSON.parse
var response = jsonplus.parse('{"foo": 5, "bar": "@self.foo"}');

console.log(response); // { foo: 5, bar: 5 }

上面的例子可以看出

接口和json的差不多，都是parse方法
json里支持@self

@self其实jsonplus的一个特性，即Self referencing（自引用）

它还有一个特性，即可以使用模板来解析，拼装

{
  "first": "john",
  "last": "doe",
  "full": "{{ first }} {{ last }}"
}

这不能简单的实现，需要resolve方法

用起来也比较简单

var resolve = require('jsonplus').resolve

// This will resolve all reference strings on the given object
var object = resolve(AlreadyParsedJSON);

// resolve has a second argument, which provides the context for references
var object = resolve({ full: '{{ first }} {{ last }}' }, { first: 'john', last: 'doe' });

console.log(object) // { full: 'john doe' }

过瘾么？再来个更复杂的demo

{
  // Get all users
  "/api/users": {
    // Mock response
    "response": {
      "users": [{
        "name": "john doe"
      }, {
        "name": "jane doe"
      }]
    }
  },

  // Get individual user
  "/api/user/1": {
    // Get already defined user from users mock
    "response": "@self['/api/users'].response.users[0]"
  },

  // Get individual user
  "/api/user/2": {
    // Get already defined user from users mock
    "response": "@self['/api/users'].response.users[1]"
  }
}

这也是我们常见的需求，复杂json解析还是必要的。如果各位熟悉rails的jbuilder就会感觉有点意思了。

最后给出作者写这个库的原因

Self referencing and comments in JSON files can be really useful while creating fixture files. I don't expect anyone to use this for production purposes. JSONPlus should help you create simpler fixtures with comments and can be also used for configuration files.

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