Hi Gustaf,
I’ve noticed you had  uploaded a simple client interface to 
websocket-procs.tcl. 
https://bitbucket.org/naviserver/websocket/src/master/websocket-procs.tcl 
<https://bitbucket.org/naviserver/websocket/src/master/websocket-procs.tcl>

However, I hit another error related to [dict], because the url doesn’t return 
a path, when [dict get $d path] runs. 
The websocket sample is  "wss://javascript.info/article/websocket/demo/hello"

Best wishes,
I



[12/Jul/2020:21:03:33][22342.7efbf37fe700][-conn:iurix:0:36-] Error: can't read 
"path": no such variable
    while executing
"append request_url /$path"
    (procedure "ws::client::open" line 19)
    invoked from within
"ws::client::open $url"
    ("uplevel" body line 8)
    invoked from within
"uplevel {
    ns_log Notice "Running TCL script luna.tcl"


#set url 
"ws://192.199.241.130:5008/api/subscribe?auth_token=9fb6e731-b342-4952-b0c1-aa1d0..."
    (procedure "code::tcl::/var/www/iurix//packages/ix-websocket/www/luna" 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 $themed_template {}"
    (procedure "adp_parse_ad_conn_file" line 14)
    invoked from within
"$handler"
    ("uplevel" body line 2)
    invoked from within
"uplevel $code"
    invoked from within
"ad_try {
                $handler
            } ad_script_abort val {
                # do nothing
            }"
    invoked from within
"rp_serve_concrete_file [ad_conn file]"
    (procedure "::nsf::procs::rp_serve_abstract_file" line 60)
    invoked from within
"rp_serve_abstract_file "$root/$extra_url""
    ("uplevel" body line 2)
    invoked from within


> On Dhuʻl-Q. 20, 1441 AH, at 21:14, Iuri de Araujo Sampaio <i...@iurix.com> 
> wrote:
> 
> Hi there,
> 
> My code's intended to open a websocket connection to the echo service, wait 
> 400ms to ensure that the connection is really established and send a textual 
> message, which should be echoed back by the echo service. 
> 
> The last part will be handling/parsing that message (i.e. TXT or JSON 
> message, which was echoed in that channel). Thus, every time a message comes 
> through the channel a callback will be in charge to parse that message and 
> store its content.
> 
> However, when I run the first version of the code, and it returns an error 
> related to: Error: can't set "formMap": variable is array
> 
> 
> /usr/local/src/ns-4.9.17/tcl8.6.8/library/http/http.tcl:      return [string 
> map $formMap $string]
> /usr/local/src/tcl8.6.9/library/http/http.tcl:        variable formMap [array 
> get map]
> 
> 
> The error is related to core packages, and I believe it happens to fail 
> because that source is some sort of an old code. Thus, it’s not a good idea 
> to fork it at all.  
> How would refactor a "background websocket connection", using the new 
> implementation available at: 
> https://bitbucket.org/naviserver/websocket/src/master/ 
> <https://bitbucket.org/naviserver/websocket/src/master/> ?
> 
> Here it’s the code
> 
> package require websocket
> ::websocket::loglevel debug
> proc handler { sock type msg } {
>     switch -glob -nocase -- $type {
>         co* {
>             ns_log Notice "Connected on $sock"
>             puts "Connected on $sock"
> 
>         }
>         te* {
>             ns_log Notice "RECEIVED $msg"
>             puts "RECEIVED: $msg"
>         }
>         cl* -
>         dis* {
>         }
>     }
> 
> }
> proc test { sock } {
>     puts "[::websocket::conninfo $sock type] from [::websocket::conninfo 
> $sock sockname] to [::websocket::conninfo $sock peername]"
> 
>     ::websocket::send $sock text "Testing, testing..."
> }
> set sock [::websocket::open 
> wss://javascript.info/article/websocket/demo/hello 
> <wss://javascript.info/article/websocket/demo/hello> handler]
> ns_log Notice "SOCKET \n $socket"
> after 400 test $sock
> vwait forever
> 
> 
> 
> 
> Documentation Reference: 
> https://core.tcl-lang.org/tcllib/doc/tcllib-1-17/embedded/www/tcllib/files/modules/websocket/websocket.html#1
>  
> <https://core.tcl-lang.org/tcllib/doc/tcllib-1-17/embedded/www/tcllib/files/modules/websocket/websocket.html#1>
> 
> 
> Best wishes,
> I
> 
> 
> 
> 
> 
> 
> [11/Jul/2020:20:39:38][471.7efbf37fe700][-conn:iurix:0:91-] Error: can't set 
> "formMap": variable is array
>     while executing
> "variable formMap [array get map]"
>     (procedure "init" line 15)
>     invoked from within
> "init"
>     (in namespace eval "::http" script line 83)
>     invoked from within
> "namespace eval http {
>     # Allow resourcing to not clobber existing data
> 
>     variable http
>     if {![info exists http]} {
>       array set http {
>           -ac..."
>     (file "/usr/local/ns/lib/tcl8/8.6/http-2.9.0.tm" line 16)
>     invoked from within
> "source -encoding utf-8 /usr/local/ns/lib/tcl8/8.6/http-2.9.0.tm"
>     ("package ifneeded http 2.9.0" script)
>     invoked from within
> "package require http 2.7"
>     (file "/usr/local/ns/lib/tcllib1.19/websocket/websocket.tcl" line 20)
>     invoked from within
> "source /usr/local/ns/lib/tcllib1.19/websocket/websocket.tcl"
>     ("package ifneeded websocket 1.4.1" script)
>     invoked from within
> "package require websocket"
>     ("uplevel" body line 3)
>     invoked from within
> "uplevel {
>     
> package require websocket
> ::websocket::loglevel debug
> proc handler { sock type msg } {
>     switch -glob -nocase -- $type {
>       co* {
>           ..."
>     (procedure "code::tcl::/var/www/iurix//packages/ix-websocket/www/ws2" 
> line 2)
>     invoked from within
> "code::tcl::$__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 $themed_template {}"
>     (procedure "adp_parse_ad_conn_file" line 14)
>     invoked from within
> "$handler"
>     ("uplevel" body line 2)
>     invoked from within
> "uplevel $code"
>     invoked from within
> "ad_try {
>                 $handler
>             } ad_script_abort val {
>                 # do nothing
>             }"
>     invoked from within
> "rp_serve_concrete_file [ad_conn file]"
>     (procedure "::nsf::procs::rp_serve_abstract_file" line 60)
>     invoked from within
> "rp_serve_abstract_file "$root/$extra_url""
>     ("uplevel" body line 2)
>     invoked from within
> "uplevel $code"
>     invoked from within
> "ad_try {
>                 rp_serve_abstract_file "$root/$extra_url"
>                 set ::tcl_url2file([ad_conn url]) [ad_conn file]
>                 se..."
>     called from rp_handler
>         GET http://iurix.com/websocket/ws2? <http://iurix.com/websocket/ws2?> 
> referred by '' peer 192.199.241.135 user_id 0
> 
>  Host:        iurix.com <http://iurix.com/>
>  X-Real-IP:   179.199.201.237
>  Connection:  close
>  Upgrade-Insecure-Requests:   1
>  User-Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) 
> AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36
>  Accept:      
> text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
>  Accept-Language:     pt-BR,pt;q=0.9,en-US;q=0.8,en;q=0.7
>  Cookie:      _ga=GA1.2.1048850939.1594336017; 
> _gid=GA1.2.432393726.1594336018; mycrawler=-6040px%3A2521px%3Aleft; 
> ad_session_id="44640008%2c0%2c0%2c1594507600%20{834%201594508800%20914BAD40D8EF86359761E4528028EE55857B5F51}"
> 
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