Successful DELETE still throws error

[Dissgruntled]

Using this code:

alias unfollowchan {
  var %json followdel
  JSONOpen -duw %json https://api.twitch.tv/kraken/users/ $+ $lower($me) $+ /follows/channels/ $+ $lower($1)
  JSONUrlMethod %json DELETE
  JSONUrlHeader %json Connection close
  JSONUrlHeader %json Accept application/vnd.twitchtv.v3+json
  JSONUrlHeader %json Authorization OAuth $oauth
  JSONUrlGet %json
  if ($jsonerror) echo -s $json(%json).error
}

the object is successfully deleted but still gives the error

Unable to Parse: Invalid JSON

[SReject]

What does this echo

alias unfollowchan {
  var %json followdel
  JSONOpen -duw %json https://api.twitch.tv/kraken/users/ $+ $lower($me) $+ /follows/channels/ $+ $lower($1)
  JSONUrlMethod %json DELETE
  JSONUrlHeader %json Connection close
  JSONUrlHeader %json Accept application/vnd.twitchtv.v3+json
  JSONUrlHeader %json Authorization OAuth $oauth
  JSONUrlGet %json
  if ($jsonerror) {
    echo -s $json(%json).error

    var %get = response.responseText.substring(0,3500)
    echo -s >> $com(JSONHandler::followdel, eval, 1, bstr, %get) >> $replace($com(JSONHandler::followdel).result, $cr, \r, $lf, \n, $chr(32), \s)
  }
}

[Dissgruntled]

Unable to Parse: Invalid JSON (double arrow) 1 >>

[SReject]

Could you run this test:

alias unfollowchan {
  var %json followdel
  JSONOpen -duw %json https://api.twitch.tv/kraken/users/ $+ $lower($me) $+ /follows/channels/ $+ $lower($1)
  JSONUrlMethod %json DELETE
  JSONUrlHeader %json Connection close
  JSONUrlHeader %json Accept application/vnd.twitchtv.v3+json
  JSONUrlHeader %json Authorization OAuth $oauth
  JSONUrlGet %json
  if ($jsonerror) {
    echo -s $json(%json).error

    var %get = response.responseText.length
    echo -s Call: $com(JSONHandler::followdel, eval, 1, bstr, %get) -- Length: $com(JSONHandler::followdel).result

    var %get = response.responseText.substring(0,3500)
    echo -s Call: $com(JSONHandler::followdel, eval, 1, bstr, %get) -- Text: $replace($com(JSONHandler::followdel).result, $cr, \r, $lf, \n, $chr(32), \s)
  }
}

[Dissgruntled]

Unable to Parse: Invalid JSON
Call: 1 -- Length: 0
Call: 1 -- Text:

[SReject]

Mkay. The issue is that twitch is returning invalid JSON in the aspect that it is not returning anything. The JSON parser can't parse data that doesn't exist. For this use-case you can ignore this specific error by using:

if ($json(%json).error && $v1 !=== Unable to Parse: Invalid JSON) {
    ;; an error occurred but it wasn't due to empty JSON
}

As per the JSON standard raising an error for no data is the correct handling. You can test this with your browser's dev console by entering the following line:

JSON.parse("")

[Dissgruntled]

Ok. This is from the twitch API:

Example Response

204 No Content if successful.

The error was no big deal to me, just wanted to let you know.

[SReject]

I do appreciate it.

In the future there's links on the main page of this project for realtime chat that may be a better place for this sort of discussion. (Gitter which is tied directly into github and uses your webbrowser, and swift which is an IRC interface)