发表新帖
发表新帖

Regex to match a JSON String

后端 未结
关注
1 1426
不要未来只要你来
不要未来只要你来 2020-12-16 15:41

I am building a JSON validator from scratch, but I am quite stuck with the string part. My hope was building a regex which would match the following sequence found on JSON.o

1条回答
  • 野趣味
    野趣味 (楼主)
    2020-12-16 16:07

    For your exact question create a character class

    # Matches any character that isn't a \ or "
/[^\\"]/

    And then you can just add * on the end to get 0 or unlimited number of them or alternatively 1 or an unlimited number with +

    /[^\\"]*/

    or

    /[^\\"]+/

    Also there is this below, found at https://regex101.com/ under the library tab when searching for json

    /(?(DEFINE)
# Note that everything is atomic, JSON does not need backtracking if it's valid
# and this prevents catastrophic backtracking
(?(?>\s*(?&object)\s*|\s*(?&array)\s*))
(?(?>\{\s*(?>(?&pair)(?>\s*,\s*(?&pair))*)?\s*\}))
(?(?>(?&STRING)\s*:\s*(?&value)))
(?(?>\[\s*(?>(?&value)(?>\s*,\s*(?&value))*)?\s*\]))
(?(?>true|false|null|(?&STRING)|(?&NUMBER)|(?&object)|(?&array)))
(?(?>"(?>\\(?>["\\\/bfnrt]|u[a-fA-F0-9]{4})|[^"\\\0-\x1F\x7F]+)*"))
(?(?>-?(?>0|[1-9][0-9]*)(?>\.[0-9]+)?(?>[eE][+-]?[0-9]+)?))
)
\A(?&json)\z/x



    This should match any valid json, you can also test it at the website above
    


    EDIT:
    


    Link to the regex
    
    
    
             
    
                                                        
    
            
            
    
              
                
                0
              
                   
                
               讨论(0)
              
                                                  
              
              
    
                          
             
       
          
              
    
                                    
    
                         
          
                              			
        
        
        
    
          
    
            
            
    
              
              
    
            
    


                                 
              
    
            
    
                          
    

        
         
    
                
                
    
                  
                
    
                
    
                   看不清?
                
    
              
    
                                  
    
                    
   
                 
             
              
    提交回复
    
            
    
          
    
        
    
      
       
      
    
    
    
          
 
     
 
    
        
    热议问题