Identify if URL points to PiCoWebserver or to "normal" web service from Plantuml?

0 votes
asked Aug 16 in Question / help by rkrug (400 points)
commented Aug 16 by Rainer
I was not able to enter any text in the question...

SO: I have an R function which generates the url to generate the graph. I woyld like to automate the checking of the types supported by querying the URL. Is this possible?

1 Answer

0 votes
answered Aug 17 by plantuml (279,640 points)

A possible option is to check HTTP headers sent back by the server. If it contains Server: PlantUML PicoWebServer then, it's a PicoWebServer.

Does it help?

commented Aug 17 by rkrug (400 points)

Hm. Sounds doable - but I do not know much about http and web servers...

As the reason I would like to know this is to identify the supported formats, would it be possible to add a document which contains the supported formats? Something along the lines of http://server:port/supportedformats which returns text of json containing the supported formats and other relevant info?

commented Aug 17 by plantuml (279,640 points)

Sure, this http://server:port/supportedformats endpoint is a good idea.

The most complex part is to defined what will be in the actual json data :-)

To start, I suggest that you give us the data you are expecting for "PicoWebServer".

We will then hardcode this in the endpoint http://server:port/supportedformats for "PicoWebServer".

This should be easy to implement.

commented Aug 17 by rkrug (400 points)

Great. The information I would need, is at the moment only the supported formats, as I think that is the only difference in the servers? i.e. there is nothing else that differs between a call to the web server or the PicoWebServer.

probably in a different endpoint, the version of plantuml used would also be useful to know in some cases. So the endpoint could be named http://server:port/serverinfo and one entry could be the supported formats. Another one the server type (PicoWebServer or web service) the version, etc.

commented Aug 17 by rkrug (400 points)
Oh - supported formats and the code used in the call "server:port/FORMAT_CODE/ENCODED_GRAPH
commented Aug 23 by rkrug (400 points)
Any news on this? I just continued working  the package where this would be extremely useful.
commented Aug 23 by plantuml (279,640 points)
Yes, we will implement something here.

However, please be patient: we are also working on other subjects and this is not our top priority. I think that a first release will be done before end of September.
commented Aug 23 by rkrug (400 points)
Thanks - fine with me. End of September is fine.
commented Aug 24 by plantuml (279,640 points)
With last snapshot https://github.com/plantuml/plantuml/releases/tag/snapshot PicoWeb is now sending some information when calling localhost:8000/serverinfo or localhost:8000/plantuml/serverinfo

This is really a first draft so tell us if it is what you are expecting.
commented Aug 25 by rkrug (400 points)
Brilliant - that contains all the info I need at the moment.

Thanks a lot.

I will inform you when the R package is ready and you can add it to your section.
commented Aug 31 by rkrug (400 points)
I assume this will be deployed in the September release as the stop server feature?

Do you have any idea when it will be in the PlantUML Web Server available?

Thanks.
...