I mean outTerminator = CR LF; of course
Freddie
> -----Original Message-----
> From: Akeroyd, Freddie (STFC,RAL,ISIS)
> Sent: 10 June 2022 14:31
> To: Gregory, Chris (STFC,RAL,CLF) <christopher.gregory at stfc.ac.uk>
> Cc: tech-talk at aps.anl.gov
> Subject: RE: StreamDevice with a REST API
>
> Hi Chris,
>
> I think I read somewhere that HTTP/1.1 defined CR LF as the end-of-line
> marker? So maybe
>
> outTerminator = CF LF;
> replyTimeout = 5000;
> out "GET
> http://<my_ip_address>:8001/REST/HTTP_CMD/?RDVAR/State HTTP/1.1";
> out "";
> in "%#s";
>
> Regards,
>
> Freddie
>
> > -----Original Message-----
> > From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Chris
> > Gregory
> > - STFC UKRI via Tech-talk
> > Sent: 10 June 2022 14:10
> > To: tech-talk at aps.anl.gov
> > Subject: StreamDevice with a REST API
> >
> > I'm writing an IOC for a device that has a REST API. Replies are
> > simple and predictable so I'm hoping that I won't need anything more
> > complex than StreamDevice.
> >
> > At the moment I can't get a reply from the device. In my dev setup I'm
> > running the IOC under WSL2, with the device software running on the
> > Windows host on port 8001. The port is open in the firewall. Would
> > anyone have any pointers please? (I've subbed my real Windows host ip
> > address with <my_ip_address> in the below but in the application I've
> > got the full address written out.)
> >
> >
> > Protocol:
> > read_variable{
> > outTerminator = LF LF;
> > replyTimeout = 5000;
> > out "GET
> > http://<my_ip_address>:8001/REST/HTTP_CMD/?RDVAR/State HTTP/1.1";
> > in "%#s";
> > }
> >
> > Record:
> > record (stringin, "RDV_TEST") {
> > field(DTYP, "stream")
> > field(INP, "@eksplaAPL038.proto read_variable() $(PORT)")
> > field(SCAN, "5 second")
> > }
> >
> >
> > PORT configuration in st.cmd:
> > drvAsynIPPortConfigure("$(PORT)", "<my_ip_address>:8001
> > HTTP",0,0,0)
> >
> >
> > When I run the IOC the asynTraceMask shows that I'm sending what I
> > expect, but I don't get any reply. E.g.
> > epics> 2022/06/10 13:40:59.703 <my_ip_address>:8001 HTTP write
> > 67
> > GET http://<my_ip_address>:8001/REST/HTTP_CMD/?RDVAR/State
> > HTTP/1.1\n\n
> >
> >
> > Using telnet from WSL2 with the same ip:port the following both
> > succeed and get the expected reply from the device:
> > GET http://<my_ip_address>:8001/REST/HTTP_CMD/?RDVAR/State
> > HTTP/1.1
> > or
> > GET /REST/HTTP_CMD/?RDVAR/State HTTP/1.1
> >
> >
> > I've tried the following "out" commands in the protocol file. No reply
> > in any
> > case:
> > out "GET
> > http://<my_ip_address>:8001/REST/HTTP_CMD/?RDVAR/State HTTP/1.1";
> > out "GET
> > http://<my_ip_address>:8001/REST/HTTP_CMD/?RDVAR/State";
> > out "GET /REST/HTTP_CMD/?RDVAR/State HTTP/1.1";
> > out "GET /REST/HTTP_CMD/?RDVAR/State";
> >
> > I'd be grateful for any help,
> > Chris
> >
> >
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This email and any attachments are intended solely for the use of the named recipients. If you are not the intended recipient you must not use, disclose, copy or distribute this email or any of its attachments and should notify the sender immediately and delete this email from your system. UK Research and Innovation (UKRI) has taken every reasonable precaution to minimise risk of this email or any attachments containing viruses or malware but the recipient should carry out its own virus and malware checks before opening the attachments. UKRI does not accept any liability for any losses or damages which the recipient may sustain due to presence of any viruses.
- References:
- StreamDevice with a REST API Chris Gregory - STFC UKRI via Tech-talk
- RE: StreamDevice with a REST API Freddie Akeroyd - STFC UKRI via Tech-talk
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