javascript - Json 中的解析函数

Question

我有这个 JSON 作为函数 JSON.stringify() 的结果:

{"get":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if('object'==typeof g)for(h in g)i[h]=g[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||d,i.oauthio={provider:a,tokens:b,request:c},e.http(i)}","post":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if('object'==typeof g)for(h in g)i[h]=g[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||d,i.oauthio={provider:a,tokens:b,request:c},e.http(i)}"}

如何看出值中有函数。我想重建这个 JavaScript 对象，我的目标是删除结果中的引号以及值；因为在这种情况下，函数被识别为字符串。我想要这样的东西:{key : value}

现在我得到:{key : "value"}

Answer 1

快速回答:

下面的函数可以做到这一点:

function fix(obj){

    for (var property in obj) {
        if (obj.hasOwnProperty(property)) {
            obj[property] = eval("(" + obj[property] + ")");
        }
    }

}

如果 obj 有您的 JSON 解析对象，那么只需执行以下操作:

fix(obj);
console.log(obj); // in case you want to see the change in the console

说明(如果您需要):

如果在调用 eval 之前用括号“()”将字符串括起来，您将能够获得 javascript 函数表达式。

所以达到预期结果的步骤是:

1. 将函数表达式字符串括在括号中(原因见脚注)
2. 调用eval函数对函数声明表达式求值
3. 将函数声明表达式分配给包含字符串值的同一属性

对于您给出的简单示例，您可以通过以下方式获得所需的结果:

var obj = {"get":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if('object'==typeof g)for(h in g)i[h]=g

[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||d,i.oauthio=

{provider:a,tokens:b,request:c},e.http(i)}","post":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if

('object'==typeof g)for(h in g)i[h]=g[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||

d,i.oauthio={provider:a,tokens:b,request:c},e.http(i)}"};

obj.get = eval("(" + obj.get + ")");
obj.post = eval("(" + obj.post + ")");

您可以使用以下函数将其自动化:

function fix(obj){

    for (var property in obj) {
        if (obj.hasOwnProperty(property)) {
            obj[property] = eval("(" + obj[property] + ")");
        }
    }

}

你的最终代码应该是这样的:

function fix(obj){

        for (var property in obj) {
            if (obj.hasOwnProperty(property)) {
                obj[property] = eval("(" + obj[property] + ")");
            }
        }

    }


var obj = {"get":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if('object'==typeof g)for(h in g)i[h]=g

    [h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||d,i.oauthio=

    {provider:a,tokens:b,request:c},e.http(i)}","post":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if

    ('object'==typeof g)for(h in g)i[h]=g[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||

    d,i.oauthio={provider:a,tokens:b,request:c},e.http(i)}"};

fix(obj);

---

脚注:

如果您想知道为什么需要括号，请查看以下链接:

Why does JavaScript's eval need parentheses to eval JSON data?