Unable to send data containing $ in key to Firebase

Question

I am trying to post some data to Firebase (the relative part of the url is / messages.json). The following request content:

{"gsx$enddate":"sometime"} 

Gives the following error:

Invalid data failed to parse JSON object, array or value. You may be using invalid characters in your key names.

This is really JSON. What am I doing wrong?

Answer 1

This is supposed to be valid JSON, but it looks like this is a limitation for FireBase

From the FireBase documentation :

Character Set Limitations

Please note that the URLs used to create Firebase links can contain any Unicode characters except:

• . (point)
• $ (dollar sign)
• [ (left square bracket)
• ] (right square bracket)
• # (hash or pound sign)
• / (slash)