Forum OpenACS Development: Re: JSON Array & objects

Gustaf,

I've installed rl_json and called it into NS environment, as in:

package require rl_json

Then, it returned errors related to librl_json0.9.11.so
Error: couldn't load file "/usr/local/ns/lib/rl_json0.9.11/librl_json0.9.11.so": /usr/local/ns/lib/rl_json0.9.11/librl_json0.9.11.so: undefined

It seems TCL 8.6 is required to run rl_json. However, I installed Naviserver using install-ns scripts (from your GIT repository), and the script installs TCL 8.5.19 from tarball.

Now, I need to remove TCL 8.5.19 manually, and then install TCL8.6, using apt-get this time :)

Will I run into problems with NS, removing TCL 8.5.19 and installing TCL 8.6? I believe NS won't be aware of TCL installation.

If so, I wonder if I could just amend install-ns script, replacing TCL 8.5.19 with TCL 8.6, then I'd simply run install-ns again, overwriting everything. And "Voià!"

What do you think?

Best wishes

[08/Mar/2018:08:00:27][1877.7f92267af700][-conn:evex:0-] Notice: ignore non-existing or untrusted host header, fall back to

[08/Mar/2018:08:00:27][1877.7f92267af700][-conn:evex:0-] Error: couldn't load file "/usr/local/ns/lib/rl_json0.9.11/librl_json0.9.11.so": /usr/local/ns/lib/rl_json0.9.11/librl_json0.9.11.so: undefined symbol: Tcl_NREvalObj
while executing
"load /usr/local/ns/lib/rl_json0.9.11/librl_json0.9.11.so rl_json"
("package ifneeded rl_json 0.9.11" script)
invoked from within
"package require rl_json "
("uplevel" body line 44)
invoked from within
"uplevel {
ad_page_contract {

} {
{token}
{content_type}
{item_type ""}
{event_types ""}
{location ""}
{neighbourhoods ""}..."
(procedure "code::tcl::/var/www/evex/packages/evex-rest/www/itemsListReq..." line 2)
invoked from within
"code::tcl::$__adp_stub"
("uplevel" body line 12)
invoked from within
"uplevel {

if { [file exists $__adp_stub.tcl] } {

# ensure that data source preparation procedure exists and is up-to-date
..."
(procedure "adp_prepare" line 2)
invoked from within
"adp_prepare"
invoked from within
"template::adp_parse [file rootname [ad_conn file]] {}"
(procedure "adp_parse_ad_conn_file" line 6)
invoked from within
"$handler"
("uplevel" body line 2)
invoked from within
"uplevel $code"
invoked from within

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

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

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,

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.

OpenACS uses tdom for many tasks via the xml_* interface. Examples are .xql and .info fiiles.

Yes, it could be.