JavaScript - Parsing JSON with carriage and new line spaces

Question

I am using the following JS code to parse a JSON string from a separate JS file:

// extract JSON from a module's JS var jsonMatch = data.match( /\/\*JSON\[\*\/([\s\S]*?)\/\*\]JSON\*\// ); data = JSON.parse( jsonMatch ? jsonMatch[1] : data );

This is an example of the JS file I extract the JSON string from:

JsonString = /*JSON[*/{"entities":[{"type":"EntityPlayer","x":88,"y":138}]}/*]JSON*/;

This code works just fine, however if the JS file with the JSON string contains carriage returns and isn't on one complete line then I get a syntax error.

Example:

JsonString = /*JSON[*/{ "entities":[{ "type":"EntityPlayer", "x":88, "y":138}] }/*]JSON*/;

Returns the following error:

JSON.parse: unexpected non-whitespace character after JSON data

Any idea how I could modify my parsing to work by either stripping out whitespace or to remove carriage returns and new line spaces?

You could be overthinking it. How are you fetching this file? How do you get it's contents? — Joseph
– Joseph, Commented Jun 14, 2012 at 6:46
I agree with above probably best to try and get rid of the carriage returns and white space rather than code around it. In php you could use some like json_encode to do this for you. — matpol
– matpol, Commented Jun 14, 2012 at 6:52

jornare · Accepted Answer · 2012-06-14 06:54:54Z

6

data = JSON.parse( (jsonMatch ? jsonMatch[1] : data).replace(/\n/g,"") );

answered Jun 14, 2012 at 6:54

jornare

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1 Comment

gotnull Over a year ago

I'll accept this answer, however the following was actually an issue where I wasn't closing a StreamReader object in my C# code.

DerApe · Accepted Answer · 2012-06-14 06:58:13Z

-1

Did not test it, but maybe this is what you are looking for?

var JsonString = JsonString.replace(new RegExp( "\\n", "g" ),"");

(from http://www.bennadel.com/blog/161-Ask-Ben-Javascript-Replace-And-Multiple-Lines-Line-Breaks.htm)

edited Jun 14, 2012 at 6:58

answered Jun 14, 2012 at 6:45

DerApe

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2 Comments

ThiefMaster Over a year ago

Whitespace is perfectly valid in a JSON string.

DerApe Over a year ago

Okay, sorry I understood the question in a wrong way. Though it's more or less java string replacement.

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