正则表达式以验证JSON [英] Regex to validate JSON

问题描述

我正在寻找允许我验证json的正则表达式.

I am looking for a Regex that allows me to validate json.

我对Regex来说是个新手，我知道使用Regex进行解析很不好，但是可以用来验证吗?

I am very new to Regex's and i know enough that parsing with Regex is bad but can it be used to validate?

推荐答案

是的，可以进行完整的正则表达式验证.

大多数现代正则表达式实现都允许递归正则表达式，该正则表达式可以验证完整的JSON序列化结构. json.org规范使其非常简单.

$pcre_regex = '
  /
  (?(DEFINE)
     (?<number>   -? (?= [1-9]|0(?!\d) ) \d+ (\.\d+)? ([eE] [+-]? \d+)? )    
     (?<boolean>   true | false | null )
     (?<string>    " ([^"\\\\]* | \\\\ ["\\\\bfnrt\/] | \\\\ u [0-9a-f]{4} )* " )
     (?<array>     \[  (?:  (?&json)  (?: , (?&json)  )*  )?  \s* \] )
     (?<pair>      \s* (?&string) \s* : (?&json)  )
     (?<object>    \{  (?:  (?&pair)  (?: , (?&pair)  )*  )?  \s* \} )
     (?<json>   \s* (?: (?&number) | (?&boolean) | (?&string) | (?&array) | (?&object) ) \s* )
  )
  \A (?&json) \Z
  /six   
';

它与 PCRE函数一起在PHP中运行良好.应该在Perl中保持不变；并且可以肯定地适用于其他语言.此外，它还可以使用 JSON测试用例.

It works quite well in PHP with the PCRE functions . Should work unmodified in Perl; and can certainly be adapted for other languages. Also it succeeds with the JSON test cases.

一种更简单的方法是按照 RFC4627第6 节中的规定进行最小一致性检查.但是，它仅用作安全性测试和基本的非有效性预防措施:

A simpler approach is the minimal consistency check as specified in RFC4627, section 6. It's however just intended as security test and basic non-validity precaution:

  var my_JSON_object = !(/[^,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]/.test(
         text.replace(/"(\\.|[^"\\])*"/g, ''))) &&
     eval('(' + text + ')');

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