How can I find out what JSON is being passed?

Question

Programming

Engaged in the development of the server part for the application. I use Node js as a server. So, data from the application comes to the server in JSON format, it is parsed there, checked and transmitted back. But if you send any other string to the server
, for example "dhsdsds", then Node.js immediately crashes without giving any errors. Can someone tell me how to find out that the string is in JSON format?

Answer 1

var parsedData;

try {
    parsedData = JSON.parse(data)
} catch (e) {
    // is not a valid JSON string
}

Is this option not right for you?

Answer 2

try {
    jQuery.parseJSON(response);
} catch(error) {
    // это не json
}

Answer 3

The server on http twitches? Decent people use headers like
Content-Type: application/json . Filter by it.
Node.js, by the way, is suddenly not a "language for the server" and not a "language" at all.

Answer 4

as a language

you are using javascript as the language. Feel the difference.
it throws an exception somewhere inside when doing JSON.parse.
The Content-Type header, but there is a chance that the client might be writing a moron who will not correctly set this header, so you need to fix the error handling anyway. It's only in PHP that you can do nothing, and then only if you stick to the classic dying model.