在JSON中的键上缺少引号

Question

I have a string containing malformed JSON which is being provided to me where the keys are missing the quotation marks. The structure of the JSON is out of my control, so I need to work with what I have. I have found the solution that the OP posts in Parsing malformed JSON in JavaScript works, however one of the values contains a URL that the RegEx matches and transforms it into another key like value, resulting in really broken JSON. Any ideas?

I have also looked at jsonrepair , but not having much success there.

Answer 1

This should do it. All you needed to do was identify when a colon was followed by a forward-slash (like in http://) instead of in isolation. Note that this will fail in the event that one of your JSON values has a colon in it, so it may need more improvement for your use case.

.replace(/(['"])?([a-zA-Z0-9_]+)(['"])?:([^\/])/g, '"$2":$4');

Answer 2

If the only thing wrong with the JSON is property names without quotes, then it is still a valid JavaScript object literal even though it isn't valid JSON.

So, if you trust the source , you can wrap the text in parentheses and eval it.

This will be simpler and more reliable than any regular expression.

Example:

var badJSON = '{ a: "b" }';
var obj = eval( '(' + badJSON + ')' );
console.log( obj );    // Logs: Object {a: "b"}
console.log( obj.a );  // Logs: b