[ovirt-devel] Re: Parsing gwt rpc messages

Hi, Interesting -- what are you trying to achieve? This should help: The GWT-RPC Wire Protocol - Google Docs https://docs.google.com/document/d/1eG0YocsYYbNAtivkLtcaiEE5IOF5u4LUol8-L... On Tue, Oct 23, 2018 at 2:47 AM Anastasiya Ruzhanskaya < anastasiya.ruzhanskaya(a)frtk.ru&gt; wrote: > Hello everyone! > I am trying to determine how the person who knows for example all > necessary function calls and parameters can determine the content of the > message sent. > This is an example of the message I am trying to parse > (I already separated it on some meaningful parts), numbers in braces just > help to make correspondence between payload and strings: > 7| > 0| > 14| > (1)https://engine.localdomain/ovirt-engine/webadmin/| //URL > (2)E8B2AD24442204349EF795039C3B87E5| // policy name > (3)org.ovirt.engine.ui.frontend.gwtservices.GenericApiGWTService| service > interface > (4)runMultipleActions| name of the method > (5)org.ovirt.engine.core.common.action.ActionType/12242454|, > (6)java.util.ArrayList/4159755760|, > (7)Z| ( two times)) // bool type > (8)org.ovirt.engine.core.common.action.ShutdownVmParameters/1694554255| > (9)org.ovirt.engine.core.compat.Guid/1992968158| > (10)java.util.UUID/2940008275| > > (11)org.ovirt.engine.core.common.action.ActionParametersBase$EndProcedure/1568822488| > (12)java.util.Collections$EmptyMap/4174664486| > (13)org.ovirt.engine.core.common.businessentities.VDSStatus/1938301532| > (14)org.ovirt.engine.core.compat.TransactionScopeOption/1475850853| > (the following is the payload separated and commented in places where I > can understand it) > 1| > 2| > 3| > 4| > 4|- 4 method parameters > 5|- first type = ActionType > 6|- second type = arraylist > 7|- third type = boolean > 7|- fourth type = boolean > 5(actionType)|9 (shutdown)| > 6(arrayList)|1(??)| > 8 (shutdown vm parameters, list object)|1|0|0|0|(??) > 9 (guid, ?)|10(UUID)|J$m4mk9wVi3|MjeP460Xkpb (vm > uuid)|0|5|0|0|0|11|1|0|6|0|0|0|0|0|0|12|0|-6|13|0|1|0|1|14|2|0|0|0|0|0| > > > Until vm uuid parameter it is kind of clear what is happening, but I > still wonder what do the parameters 1 and 0 mean in places marked as (??). > I understand, that there is a method called runMultipleActions and it has > four parameters. I found in source examples of calling this method > (ovirt-engine/frontend/webadmin/modules/./frontend/src/test/java/org/ovirt/engine/ui/frontend/FrontendActionTest.java).Then > I determine types of these parameters. Then the type of action performed ( > I shut down the machine). Then there should be an ArrayList, which > contains several objects. I assume that 8(shutdown vm parameters) should > follow right after 6 (arraylist), but there a "1" which I can't explain. > Also for shutdown parameters: I see in examples that there are not so many > boolean parameters in constructor there. Here are four! (1|0|0|0) What do > they mean? And how can I cope with the left payload? > > Thank you in advance for any help! > > P.S. Also vm ids have another format when for example I do the same > actions from web - ui: c8de3f8e-b45e-4a5b-9fa6-e2693dc158b7. Why this is so? > without looking at it, I assume that in gwt-rpc here there is serialization / encoding the value (which is later decompressed by the client), whereas the rest api sends the normal human-readable string. (Someone else might know better.) > _______________________________________________ > Devel mailing list -- devel(a)ovirt.org > To unsubscribe send an email to devel-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/devel@ovirt.org/message/HBPXJ2ALRWC... > -- GREG SHEREMETA SENIOR SOFTWARE ENGINEER - TEAM LEAD - RHV UX Red Hat NA <https://www.redhat.com/> gshereme(a)redhat.com IRC: gshereme <https://red.ht/sig>