Forum OpenACS Development: Re: JSON Array & objects

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7: Re: JSON Array & objects (response to 6)
Posted by Steve Manning on 03/08/18 03:10 PM
I took a slightly different approach, installing rl_json 0.9.7 which avoids the TCL 8.6 Tcl_NREvalObj problem and allows me to use it with TCL8.5. Seems to be working OK so far.

I use

package require rl_json
namespace path {::rl_json}

To get the json commands into the namespace.

Hope that helps.

Steve

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8: Re: JSON Array & objects (response to 7)
Posted by Iuri Sampaio on 03/08/18 04:19 PM
It seems TDOM >= 0.9 does JSON. It parses into a DOM tree, serializes that back to the same JSON (infoset), preserving data type, order of object members, even non unique object members.

Updating TDOM seems to be an easier solution.

I will install both libraries ! rsrs
It will take more time, but it will be a good exercise to recycle skills!

Thanks Steve

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9: Re: JSON Array & objects (response to 8)
Posted by Iuri Sampaio on 03/08/18 04:56 PM
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10: Re: JSON Array & objects (response to 9)
Posted by Iuri Sampaio on 03/08/18 06:28 PM
Steve,

It turns out that tDOM 0.9 also depends on TCL 8.6. Thus, I solved the problem, amending install-ns.sh script to install tdom 0.9, tcl 8.6, and of course NS 4.99.16.

Furthermore, upgrading TCL to 8.6 was an old task that I had postponed from a while ago, because of an issue that not only myself but also Michael Aram had. He's posted here in OACS Forum, regarding [ns_return 200 text/plain ${v}v]

i.e. "Ain’t No ☀shine", https://openacs.org/forums/message-view?message_id=5379887

@Gustaf, rl_json is just beautiful! Thanks for the tip Gustaf!

Best wishes

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11: Re: JSON Array & objects (response to 10)
Posted by Steve Manning on 03/08/18 06:36 PM
I suppose I'm only delaying the inevitable :o)

Yes, rl_json is cool. I especially like the templating, the power of which I didn't appreciate until I started to use it.

Steve

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12: Re: JSON Array & objects (response to 10)
Posted by Iuri Sampaio on 03/08/18 06:38 PM
Gustaf,

As you're the author of most of install-ns.sh script, If you allow me, I can share it on my Github repository.

I also made a few more tweaks to install systemctl on Debian 8 and Ubuntu 14.04(lts)

Best wishes,

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13: Re: JSON Array & objects (response to 12)
Posted by Gustaf Neumann on 03/08/18 07:11 PM
iuri, since a few months, install-ns installs per default Tcl 8.6.8. Can it be that you have downloaded the script a while ago without updating it later?
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14: Re: JSON Array & objects (response to 13)
Posted by Gustaf Neumann on 03/09/18 08:58 AM
tdom 0.9.0 works at least with Tcl 8.5.19 (I've just compiled it iin this combination), i would expect it to be as well compatible with Tcl 8.4 and 8.3.

Although we had recently problems on one site with tdom 0.9, it turned out finally that the same problems were already in tdom 0.8.3. I think, tdom 0.9.0 can be recommended in general. The updated version of install-ns.sh contains by default support for 0.9.0.

Concerning Tcl 8.6: since Tcl 8.6.7 there are no known issues in connection with OpenACS.

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16: Re: JSON Array & objects (response to 14)
Posted by Iuri Sampaio on 03/09/18 12:53 PM
Since I've use tDOM only on XML-RPC, I've decided to try and learn rl_json.

Best wishes,

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17: Re: JSON Array & objects (response to 16)
Posted by Gustaf Neumann on 03/09/18 02:45 PM
OpenACS uses tdom for many tasks via the xml_* interface. Examples are .xql and .info fiiles.
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18: Re: JSON Array & objects (response to 17)
Posted by Iuri Sampaio on 03/09/18 04:04 PM
Yes, I've noticed that!

In fact, that's why I'd rather use it.

JSON's format has become more and more popular, as for website and webservice's integration.
I realized we have very few ad_procs related to JSON. Unfortunately, differently from XML-RPC, JSON is very much encoding dependent, which makes it hard to maintain, even harder to build API standard procs, for community-wide contribution.

Best wishes,

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15: Re: JSON Array & objects (response to 13)
Posted by Iuri Sampaio on 03/09/18 12:51 PM
Yes, it could be.