regex to detect a pattern in a JSON string

Question

I have a string like this

"Settings" : { "UserId" : 3, "UserToken" : "4578965235874158", "SecurityCode" : "111", "Password" : "12345", "UserPhone" : "555-555-1531", "drop" : -1, "UserLastName" : "Smith" }

I need a regular expression pattern to find the value of the "UserToken"( in this example 4578965235874158)

Sorry if this is a "Give me code" question, but I never worked with regular expressions and I do not have much time to learn and try to do it myself.

Thanks for help.

Additional notes: I will use it in objective-C for an iPhone application. I don't know if that affect anything but just in case.

EDIT' The pattern is: the key is always "UserToken" followed by a space then by a : then another space after that comes the value inside double Quotes ". I would like to get this value.

Describe a pattern for the token. For example, "exactly n digits" etc. — Andrew Logvinov
– Andrew Logvinov, Commented Mar 4, 2013 at 11:08
does it need to be regex? JSON values can be accessed by their key. You just need an objective-c json parser — Awalias
– Awalias, Commented Mar 4, 2013 at 11:10
Has the json always the same format? In that case I'd rather use a JSON parser than regex magic. — Marc Fischer
– Marc Fischer, Commented Mar 4, 2013 at 11:10
@Viehzeug I need to use regex because I dont know where the "settings" key is located inside the Json. It might be at the root level or inside another key. and I am trying to avoid looping on all the key and inner keys — Y2theZ
– Y2theZ, Commented Mar 4, 2013 at 11:17

Sergio · Accepted Answer · 2013-03-04 11:15:16Z

0

Since it's a json format you don't really need to parse it with regex, but if you need to, this can be a solution:

(?<="UserToken"\s:\s")\d+

answered Mar 4, 2013 at 11:15

Sergio

6,9485 gold badges33 silver badges55 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Abu Romaïssae · Accepted Answer · 2013-03-04 12:17:18Z

0

I would have converted it and access all information I need like:

NSString *str = @"\"Settings\" : { \"UserId\" : 3, \"UserToken\" : \"4578965235874158\", \"SecurityCode\" : \"111\", \"Password\" : \"12345\", \"UserPhone\" : \"555-555-1531\", \"drop\" : -1, \"UserLastName\" : \"Smith\" }";

//NSDictionary *jsonDict = [str JSONValue];

NSError *error;
NSData *jsonData = [str dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *results = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];

than all information are stored on the results NSDictionary, just have to do something like: [results valueForKey:(NSString *)] or [results objectForKey::(NSString *)]

answered Mar 4, 2013 at 12:17

Abu Romaïssae

3,8915 gold badges40 silver badges60 bronze badges

2 Comments

Y2theZ Over a year ago

Thanks for this but I need to use Regex

Abu Romaïssae Over a year ago

Welcome :) around here, we say thanks by upvotes :) perhaps if I I'll try to look & write you later a method using Regex (I don't have it on minde right now)

Collectives™ on Stack Overflow

regex to detect a pattern in a JSON string

2 Answers 2

Comments

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related