Dict, Json & type

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Ralf Wolter

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Aug 18, 2016, 2:38:44 AM8/18/16
to SWI-Prolog
My application uses a web socket hub to communicate between a Javascript Client and a Prolog server. The communication is in json format. I'm using atom_json_dict to convert the hub.queue.event data into a dict.

atom_string(Atom, Data),
atom_json_dict
(Atom, JSONDict, []),

This does not convert the type field to the dictionary tag. According to the manual json_read_dict does convert the type field. I would like to use this predicate but it requires input as a stream while http/hub provides a string.

How can I convert a string to a stream for json_read_dict and is it worth it?

Ralf

Jan Wielemaker

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Aug 18, 2016, 3:13:14 AM8/18/16
to Ralf Wolter, SWI-Prolog
On 08/18/2016 08:38 AM, Ralf Wolter wrote:
> My application uses a web socket hub to communicate between a Javascript
> Client and a Prolog server. The communication is in json format. I'm
> using atom_json_dict to convert the hub.queue.event data into a dict.
>
> |
> atom_string(Atom,Data),
> atom_json_dict(Atom,JSONDict,[]),
> |
>
> This does not convert the type field to the dictionary tag. According to
> the manual json_read_dict does convert the type field. I would like to
> use this predicate but it requires input as a stream while http/hub
> provides a string.
>
> How can I convert a string to a stream for json_read_dict and is it
> worth it?

open_string/2

--- Jan

>
> Ralf
>
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