RE: [EXTERNAL] Re: Grabbing data from REST API

["Pearson, Matthew via Tech-talk" <tech-talk at aps.anl.gov>]

Hi,

I haven't used this, but this C++ library seems easy to use for this kind of task:
https://docs.libcpr.org/introduction.html

Or, if you want to stick to a Python solution I can also recommend PyDevice:
https://github.com/klemenv/PyDevice

Cheers,
Matt

-----Original Message-----
From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Sean Leavey via Tech-talk
Sent: Friday, October 28, 2022 9:16 AM
To: Mark Rivers <rivers at cars.uchicago.edu>; tech-talk at aps.anl.gov
Subject: [EXTERNAL] Re: Grabbing data from REST API

Hi Mark,

I had hoped to avoid implementing REST client code myself! It'd be cool if there were a module that could map REST API endpoints (and probably some template for extracting the value from the returned HTTP body) to records.

I think if implementing my own client ends up being the only way (short of writing a REST client module described above - I'm not ready to tackle that yet), I'd rather use this driver that I alluded to in my first email and implement the client code in Python: 
https://github.com/paulscherrerinstitute/asynPythonDriver

Cheers,
Sean

On 28/10/2022 13:46, Mark Rivers wrote:
> Hi Sean,
> 
> The Eiger detectors from Dectris use the REST API.  This is the code 
> that is used to communicate with them from EPICS.
> 
> https://github.com/areaDetector/ADEiger/blob/master/eigerApp/src/restA
> pi.cpp 
> <https://github.com/areaDetector/ADEiger/blob/master/eigerApp/src/rest
> Api.cpp>
> 
> Mark
> 
> ----------------------------------------------------------------------
> --
> *From:* Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Sean 
> Leavey via Tech-talk <tech-talk at aps.anl.gov>
> *Sent:* Friday, October 28, 2022 7:22 AM
> *To:* tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
> *Subject:* Grabbing data from REST API Hi all,
> 
> I've got a sensor that provides its measurements via a REST API. I saw 
> on the mailing list in 2017 
> (https://epics.anl.gov/tech-talk/2017/msg01698.php
> <https://epics.anl.gov/tech-talk/2017/msg01698.php>) there was a 
> message about writing a generic REST client module for EPICS and 
> wondered if anything came about from this. If not, does anyone have a 
> suggestion how to talk REST via EPICS? I remember seeing a module that 
> allowed the IOC to call out to a Python script, where I could 
> implement the REST part, but I wondered if there's something a bit 
> more focused on this particular task available already as an EPICS module.
> 
> Cheers,
> Sean
> 
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