Simple REST API update with Postman

[Ju]

Hello,

I am new with ThingWorx and I am trying to update a property Thing on a Mashup with Postman.

(I just want to see a value change on my webpage).

To do this, I have:

- created a Thing "Ju_TestThing" (ThingTemplate : GenericThing) with a property "Ju_value" (Base type : TEXT), default value=10.

- created a Mashup "Ju_TestMashup"

- added a label on the Mashup and connected "Ju_value" to my label with "GetPropertyValues".

- added a "Auto Refresh" widget (interval : 2s)

In System / Subsystems / PlatformSubsystem / Configuration, I have checked "Allow Request Method Switch" and unchecked "Filter Content-Type".

When I click on "View Mashup", it opens a new window with URL like this:

https://pp-XXXXXXXXXXlu.devportal.ptc.io/Thingworx/Runtime/index.html#mashup=Ju_TestMashup&__fromBuilder=112c786d-7cd1-4aa0-826b-db2d9b2324de

Question : Is the end of the URL my appKey ?

In Postman:

- set PUT

- set URL : http://pp-XXXXXXXXXXlu.devportal.ptc.io/Thingworx/Things/Ju_TestThing/Properties/*

- add header "Content-Type" and "Accept" with value "application/json"

- add header "appKey" with value "112c786d-7cd1-4aa0-826b-db2d9b2324de"

- add body : {"Ju_value":30}

The result is "405 not allowed".

I have tested many others URLs, headers, body, ... each time the result is "405 not allowed".

I have read "REST API Overview and Example" but I still don't understand.

Thanks for your help.

[Rick-Stanley]

I am sorry you are having problems. A guide that addresses this use exactly is available here:

https://developer.thingworx.com/resources/guides/rest-api-how-guide/property-values-rest-api-how

Taking a look at your URL I see a couple of changes:

http://pp-XXXXXXXXXXlu.devportal.ptc.io/Thingworx/Things/Ju_TestThing/Properties/*

Be sure you are using https

I know it is duplicating information, but you must put the property name in both the url and the JSON body:

/Thingworx/Things/Ju_TestThing/Properties/Ju_value

{"Ju_value":"30"}

Since you are sending a string, you also might need to have quotes around the value 

[Ju]

I have tried to duplicate information and add quotes around the value:

Example :http://pp-1802071305lu.devportal.ptc.io/Thingworx/Things/Ju_TestThing/Properties/Ju_value

With http, Postman returns me status 405.

With https, Postman returns me status 401.

I have tested with HTTPie like in the documentation.

Here the error :

http -v -j PUT http://pp-1802071305lu.devportal.ptc.io/Thingworx/Things/Ju_TestThing/Properties/Ju_value appKey==50e5cf70-4bcd-44a3-a00d-2dbfb53b82c1 Ju_value="31"

http: error: ConnectionError: HTTPConnectionPool(host='pp-1802071305lu.devportal.ptc.io', port=80): Max retries exceeded with url: /Thingworx/Things/Ju_TestThing/Properties/Ju_value?appKey=50e5cf70-4bcd-44a3-a00d-2dbfb53b82c1 (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f16976e0358>: Failed to establish a new connection: [Errno -2] Name or service not known',)) while doing PUT request to URL: http://pp-1802071305lu.devportal.ptc.io/Thingworx/Things/Ju_TestThing/Properties/Ju_value?appKey=50e5cf70-4bcd-44a3-a00d-2dbfb53b82c1

I am looking on google about this error, but not really simple.

I continue my tests, I hope I will find the problem.

[Rick-Stanley]

That long error is basically a 404 error, your test server is probably not running and you need to restart it by signing into developer.thingworx.com and click on the "server" icon.

I tested your HTTPie command against my server and it worked for me (after replacing your server URL and appKey with mine)

[Ju · Accepted solution]

Thanks for your help.

It's still not working on my side. My server is running but no result.

I'm glad to know that my request is good. I stop my tests for the moment.

Best regards

[PaiChung]

Also make sure that the platform allows the calls, check platform subsystem configuration.

[Ju]

Thanks for your help, but as I said in my first post, I have already check platform subsystem configuration.