HTTP request with open stream

Question

Question

Nezla · Oct 9, 2022

Hi Guys,

This link (https://github.com/CassiaNetworks/CassiaSDKGuide/blob/master/node_exampl...) uses Javascript request to open a a steam and collect data in an array (screenshot below) and I'm trying to replicate this with Cache script with HTTP request which is connecting Ok but don't know how can I collect data because the code is hanging at Set tSc=Httprequest.Get(HttpURL) and cannot execute S BLEConnect=Httprequest.HttpResponse.StatusLine or any line after it.

I think the url call (ac1.mqtt.sx3ac.com/api/gap/nodes?&mac=CC:1B:E0:E1:A6:44&access_token=8f7f44d842cbcadd53713cca2ea36f256b2ec6581658fee4e246d93e28c6feb3&active=1&event=1
) should do that by keeping an open stream because if I run the same url through the browser or Postman it does the same, but how can I get the data the same way this JavaScript code is doing?

s Token=##class(MSDS.SpaceSense.API).GetAuth()
Set Httprequest=##class(%Net.HttpRequest).%New()
Set Httprequest.Server="ac1.mqtt.sx3ac.com"
Set Httprequest.Timeout=30
Set Httprequest.Https=0
set Httprequest.ContentType="application/json"
Do Httprequest.SetHeader("Accept","application/json")
Do Httprequest.SetHeader("Accept-Language","en_US")
Do Httprequest.SetHeader("Authorization","Bearer "_Token)
Set HttpURL="/api/gap/nodes?filter_rssi=-75&chip=1&mac=CC:1B:E0:E2:3C:10&active=1&event=1"
Set tSc=Httprequest.Get(HttpURL)
S BLEConnect=Httprequest.HttpResponse.StatusLine

Thanks

Product version: Ensemble 2014.1

Discussion (9)1

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score 0 · Answer 1 · 2022-10-10T16:20:53-04:00

This is just a hint: your Get() argument should be URL-encoded (colons are not allowed in an URL):

Set tSc=Httprequest.Get($zcvt(HttpURL,"O","URL"))ObjectScript
ObjectScript

score 0 · Answer 2 · 2022-10-10T17:47:14-04:00

Thanks Julius, but when I used Set tSc=Httprequest.Get($zcvt(HttpURL,"O","URL"))

I get "gateway's mac must be specified" error message

Thanks

score 0 · Answer 3 · 2022-10-10T18:26:26-04:00

At least, you are one step further (in your initial post, you wrote "...because the code is hanging at Set tSc=Httprequest.Get(HttpURL)..."). Maybe the provided MAC number is wrong. The MAC Number CC:1B:E0:E2:3C:10 belongs to Cassia Networks. Is that the right number?

I know exactly nothing about Cassia Networks and Cassia SDK... sorry.

score 0 · Answer 4 · 2022-10-10T20:29:26-04:00

I actually ran it for mac :CC:1B:E0:E1:A6:44

Set HttpURL="/api/gap/nodes?&mac=CC:1B:E0:E1:A6:44&active=1&event=1"
and here where I run it in the browser:

So I think the encoding is making the mac unrecognizable !?

Thanks

score 0 · Answer 5 · 2022-10-11T06:46:48-04:00

Try to define your parameters in a structured way:

Set Httprequest.Location="api/gap/nodes"
Do Httprequest.InsertParam("filter_rssi", -75)
Do Httprequest.InsertParam("chip", 1)
Do Httprequest.InsertParam("mac", "CC:1B:E0:E2:3C:10")
Do Httprequest.InsertParam("active", 1)
Do Httprequest.InsertParam("event", 1)
Set tSc=Httprequest.Get()ObjectScript
ObjectScript

Also Get has a test parameter, try setting it to 1 to see what's being sent and compare to a successful request.

score 0 · Answer 6 · 2022-10-11T08:27:03-04:00

updated the code as below, but the execution hangs when it comes to line (Set tSc=Httprequest.Get()) and doesn't go any further and not getting any data back.

s Token=##class(MSDS.SpaceSense.API).GetAuth()
Set Httprequest=##class(%Net.HttpRequest).%New()
Set Httprequest.Server="ac1.mqtt.sx3ac.com"
Set Httprequest.Timeout=30
Set Httprequest.Https=0
set Httprequest.ContentType="application/json"
Do Httprequest.SetHeader("Accept","application/json")
Do Httprequest.SetHeader("Accept-Language","en_US")
Do Httprequest.SetHeader("Authorization","Bearer "_Token)
Set Httprequest.Location="api/gap/nodes"
    Do Httprequest.InsertParam("filter_rssi", -75)
    Do Httprequest.InsertParam("chip", 1)
    Do Httprequest.InsertParam("mac", "CC:1B:E0:E1:A6:44")
    Do Httprequest.InsertParam("active", 1)
    Do Httprequest.InsertParam("event", 1)

//Set HttpURL="/api/gap/nodes?filter_rssi=-75&chip=1&mac=CC:1B:E0:E1:A6:44&access_token=1aed6596721cb6c23bf2977d0dc2ad85a4e9af5263df10f1f8ac399421642230&active=1&event=1"

Set tSc=Httprequest.Get()

s ^badis="Ok"

S BLEConnect=Httprequest.HttpResponse.StatusLine

S ^badis("q")=Httprequest.HttpResponse.Data.Read(Httprequest.HttpResponse.Data.Size)

and how do I set a test parameter to 1 and get the request sent, you mean like this

Do Httprequest.InsertParam("test", 1)

and then how do I check the sent request?

Thanks

score 0 · Answer 7 · 2022-10-11T08:58:45-04:00

Test is a Get method arg:

Set tSc=Httprequest.Get(, 1)ObjectScript
ObjectScript

Try this and compare the output to a successful request.

It's very likely your issue relates to mac, so you can also try:

Do Httprequest.InsertParam("mac", $zcvt("CC:1B:E0:E1:A6:44", "O", "URI"))ObjectScript
ObjectScript

score 0 · Answer 8 · 2022-10-11T09:22:33-04:00

if I add Do Httprequest.InsertParam("mac", $zcvt("CC:1B:E0:E1:A6:44", "O", "URI")) I get the following error and I change URI to URL

and I change URI to URL this error; "gateway's mac is invalid"

is there a way to know the URL call that has been sent in this Get request?

FYI, using this code suppose to get me a live connection to an Open data stream where the then collect data similar to what's in this example using node js : https://github.com/CassiaNetworks/CassiaSDKGuide/blob/master/node_exampl...

so having my code hanging maybe means the live connection is opened but I'm unable to get data ?

thanks

score 0 · Answer 9 · 2022-10-11T19:55:06-04:00

this is what I get with Set tSc=Httprequest.Get(, 1)

US-SERENITY>d ##class(SX3.Bleproc).GetTempFromAC("L")
GET /api/gap/nodes?filter_rssi=-75&chip=1&mac=CC%3A1B%3AE0%3AE1%3AA6%3A44&active=1&event=1 HTTP/1.1
User-Agent: Mozilla/4.0 (compatible; Cache;)
Host: ac1.mqtt.sx3ac.com
Accept-Encoding: gzip
Accept: application/json
Accept-Language: en_US
Authorization: Bearer a09d8dea562cc5cd99ce7076c8b803cd8a3331d53b63d771e3b5d7fd639c5604

The url seems to be fine?