Thread: [Soaplite-devel] missing soap:fault with using eval{}

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Hello all,

I have some missing SOAP-Faults with Soap:Lite 0.710.08 on Windows
Server 2003 R2 SP2 32 Bit with
ActivePerl-5.10.1.1007-MSWin32-x86-291969.msi. We have two simple
webservices provided through SOAP::Transport::HTTP::CGI with each
having it's own dispatcher CGI-script, it's own classes etc. Soap-Lite
dispatches the requests using a class instance provided with
dipsatch_with and this class instance create a new class instance with
the real webservice logic, for example accessing the database and
doing some stuff.

I recently found that under some circumstances when the logic
implementing class dies, the execution stops as expected but the error
message does not reach the client. In those circumstances Soap-Lite
seems to generate and empty response from the called function, which
is not what I need, of course. The first time I recognized this
behaviour I hunted it down to the DESTROY method of the class with the
logic which used an eval{} to catch errors from the method
disconnecting from the database. I played a little bit and it seemd
that only the existance of an eval{} with no code in it or elswhere in
DESTROY made the difference: If the eval was present and I died
somewhere in the class, Saop-Lite didn't generate a saup:Faul but an
empty response from the called method. Without the eval{} Soap-Lite
responded with a soap-Fault, as needed. I just deleted that eval{}
because I didn't need it anymore.

Now I have the problem again and hunted it down to an eval{} in the
Package DBIx::Log4perl::db. If this eval is present and my method dies
after initiating the database connection using DBIx::Log4perl,
SOAP-Lite again just generates empty method call responses. dieing
before the database initialisation and therefore don't using
DBIx::Log4perl generates a soap:Fault, as expected. Don't using
DBIx::Log4perl but normally calling DBI->connect(...) does generate a
soap:Fault even with establashing the database connection. But of
course I want to use DBIx::Log4perl. I don't think it has something to
do with DBIx::Log4perl directly because my second webservice does
establish the database connection using DBIx::Log4perl and dieing in
that webservice after connecting does produce a soap:Fault.

It seems it has something to do with the eval{} in some specific
caller depth or stuff likie that, but I'm really stuck here. Do you
have any idea under which circumstances SOAP-Lite may not be able to
recognize a die properly or can't get the error message to produce a
soap:Fault? Thanks for any hints!         

One example response how it should be:

<soap:Envelope soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
   <soap:Body>
      <soap:Fault>
         <faultcode>soap:Server</faultcode>
         <faultstring>test2 at D:/Benutzer/tschoening/Eigene Dateien/Eclipse/Perl-Bibliotheken/stmodul/elrev_dotnet.pm line 5906.</faultstring>
      </soap:Fault>
   </soap:Body>
</soap:Envelope>

...and how it is with eval{} in DBIx::Log4perl::db present:

<soap:Envelope soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
   <soap:Body>
      <elrev_SchreibeLabelResponse xsi:nil="true" xmlns="http://localhost/elrev_dotnet"/>
   </soap:Body>
</soap:Envelope>

Mit freundlichen Grüßen,

Thorsten Schöning

-- 
Thorsten Schöning
AM-SoFT IT-Systeme - Hameln | Potsdam | Leipzig

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Thread: [Soaplite-devel] missing soap:fault with using eval{}

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