Set parameters in the observation request

Question

Set parameters in the observation request

Closed this issue 3 years ago · 5 comments

Ramzi04 commented 3 years ago

I sent the following request to whoami resource located in server.py.

request = Message(code=GET, uri='coap://localhost:13928/whoami?param=32')

Then I tried to display the param value inside in the render_get method of whoami resource.

text = ["*****************: %s.*******************" % request.payload]

I get a an empty request parameters.

How I can send observation parameters to the resource in order to create certain login there ?

Answer 1 · 2021-09-18T06:09:45.000Z

Please show the changes you did to server.py that should display the parameter. (And set the observe option; otherwise, no observation will be started).

Answer 2 · 2021-09-18T13:31:24.000Z

Thanks @chrysn for the support.
I keep the same file server.py as as it is in the repo with exception of modifying whoami resource:

async def render_get(self, request):
text = ["*****************: %s.*******************" % request.payload]

set the observe option

You mean ?
request.opt.observe = 0

Answer 3 · 2021-09-18T19:34:47.000Z

request.opt.observe = 0

yes, or simply

request = Message(code=GET, uri='coap://localhost:13928/whoami?param=32', observe=0)

async def render_get(self, request):
text = ["*****************: %s.*******************" % request.payload]

Why should that show the query parameter? All you access is the payload.

Answer 4 · 2021-09-19T08:32:34.000Z

Ah sorry @chrysn, I thought I am working with PUT or FETCH methods.
So how I can show the query parameter in the GET request?

Answer 5 · 2021-09-29T11:25:40.000Z

The query parameter of CoAP is transported in the Uri-Query option. You can access it directly through request.opt.uri_query (in its "natural" form), or in composite URI form through the request.get_request_uri() getter.