json parsin problem

vald70 over 4 years ago

Hi all,

I've got a strange problem when receiving some JSON response.

when making some request with makeWebRequest, I receive respone like this

"weather":[{"id":500,"main":"Rain","description":"l\xC3\xA9g\xC3\xA8re pluie","icon":"10d"}],,

in my code, I get values with :

summary = data["weather"]["description"];
weathericon = data["weather"]["icon"];

at run time I then have :

Error: Unhandled Exception
Exception: UnexpectedTypeException: Expected Number, given String
Stack:

which I can't understand as what I need is a string ! where in the world is there a Number ?

thanks for help

jim_m_58 over 4 years ago

Which line generates the error? Is it that you are using summary and weathericon elsewhere and the error is there?

vald70 over 4 years ago in reply to jim_m_58

the line which generate the error is "summary", but if I comment it, then it's "icon" !

and no it there, no where else where the error happen !, and it's first time use in the app appart a declaration like :

var summary = null;

var weathericon = null;

OttawaDeveloper over 4 years ago

I am no expert on JSON escape, but found this suggestion that the \xC3 escape may be invalid and needs to be unicode?

stackoverflow.com/.../simplejson-loads-get-invalid-escape-x

Nik over 4 years ago in reply to OttawaDeveloper

I think I'd second that. \xC3 might be valid in javascript but json escapes with unicode. I generally wrap stuff in a {} and run it through https://jsonlint.com/ if I'm unsure

vald70 over 4 years ago in reply to Nik

I does not run the server part ! so i cannot change the answe rof server, I only can see that it advertise json/ utf-8 !

Travis.ConnectIQ over 4 years ago

I'm guessing the payload looks more like this...

{
    "weather": [
        {
            "id":500,
            "main":"Rain",
            "description":"l\xC3\xA9g\xC3\xA8re pluie",
            "icon":"10d"
        },
        // more
    ],

    // more
}

Notice that data["weather"] is an Array? You're indexing into data["weather"]["description"], which won't work. You probably want something like data["weather"][0]["description"].

vald70 over 4 years ago in reply to Travis.ConnectIQ

seem you naild it ! I was missing the square bracket of the array !