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RE: HTTPAPI returns a "Host name look up failed"



   Hi Thomas,

   I apologize for the delay in my response, I was out of commission for
   a few days.

   I believe the GEOIP program you downloaded is essentially the same as
   the one I downloaded, although my HTTPAPI version is 1.23, and my
   EXPAT is the already-compiled version.  And I'm certain there are
   differences in our system i OS versions - V5R1 for me.
   Your debug instructions are just what I was hoping for, because if I
   can localize the problem it would be much easier for you point me in
   the right direction.  However, when I get the environment set up and
   arrive at my breakpoint as directed, and try to check the values list
   for element.name using "EVAL element.name" I get an "identifier does
   not exist" message.  If I do a "find element.name" I can see
   occurrences of it, so perhaps I don't understand the syntax of the
   EVAL command in relation to a qualified entity.  Sorry for my
   ignorance, but I'd be grateful if you can walk me through this.

   Thanks!

   Rich

   [1]i'm EMAILING FOR THE GREATER GOOD
   Join me


   > Subject: RE: HTTPAPI returns a "Host name look up failed"
   > To: ftpapi@xxxxxxxxxxxxxxxxxxxxxx
   > From: thomas.raddatz@xxxxxx
   > Date: Tue, 28 Apr 2009 09:30:45 +0200
   >
   >
   >
   > Rich,
   >
   > I downloaded the GEOIP sample program from "
   >
   http://www.pentontech.com/IBMContent/Documents/article/56532_547_GeoIp
   Service.zip"
   > and I hope that it is the same that you use. I compiled and ran the
   > program with no modifications and it returned the correct country
   name. I
   > am using HTTP API V1.24beta5 and I compiled the included EXPAT from
   source.
   >
   > I suggest to add a breakpoint to the "endElement" procedure in
   module
   > HTTPXMLR4 at the following statement:
   >
   > if (p_newval <> *null); <== add breakpoint here
   > xdealloc(p_newval);
   > endif;
   >
   > Once that you are there check the content of variable
   "element.name". These
   > are the values you should get:
   >
   > ReturnCode
   > IP
   > ReturnCodeDetails
   > CountryName
   > CountryCode
   > GetGeoIPResult
   > GetGeoIPResponse
   > soap:Body
   > soap:Envelope
   >
   > Please also verify the content of "name" when you reach "endElement"
   for
   > the first time. In that case "element.name" should be "ReturnCode"
   and
   > "name" should be:
   >
   > > EVAL name :x 32
   > 00000 00520065 00740075 0072006E 0043006F - .ê.Á.È.Í.Ê.>.{.?
   > 00010 00640065 000000-- -------- -------- - .À.Á...Á.È./.Ñ4-
   >
   > (Values beyond "000000" at offset 0014 can be ignored.)
   >
   > a) If "name" equals the value as shown above but "element.name" is
   wrong,
   > something goes wrong with character translation.
   > b) If both values meet the expected values, something is wrong with
   the
   > "MapXmlData" procedure interface. Check the value of
   "root.namespace" to
   > determine which callback type is used.
   > c) If "name" does not meet the expected value, I assume that
   something is
   > wrong with your EXPAT service program.
   >
   > Also ensure that HTTPAPIR4 binds to the EXPAT service program that
   you
   > think it binds to. Use "DSPSRVPGM SRVPGM(HTTPAPIR4) DETAIL(*SRVPGM)"
   to
   > check which EXPAT service is used by HTTPAPIR4.
   >
   > Thomas.
   >
   >
   > ftpapi-bounces@xxxxxxxxxxxxxxxxxxxxxx schrieb am 27.04.2009
   23:17:25:
   >
   > >
   > > Thomas,
   > >
   > >
   > >
   > > I don't believe so. At least I'm not specifically making that
   call.
   > > I'm simply using the GEOIP program stock out-of-the-box and was
   > > assuming it would work as-is. Is the modified procedure interface
   > > you mentioned supposed to replace the one currently there for the
   > > MapXmlData procedure? I'm not certain what I should do here...
   > >
   > >
   > >
   > > Thanks,
   > >
   > >
   > >
   > > Rich
   > >
   > >
   > >
   > > > Subject: RE: HTTPAPI returns a "Host name look up failed"
   > > > To: ftpapi@xxxxxxxxxxxxxxxxxxxxxx
   > > > From: thomas.raddatz@xxxxxx
   > > > Date: Fri, 24 Apr 2009 08:26:09 +0200
   > > >
   > > >
   > > > Rich,
   > > >
   > > > Do you have a call to http_xmlns(*ON) in your program?. If
   namespaces
   > are
   > > > enabled, the procedure interface should be:
   > > >
   > > > D endElementNS PR
   > > > D userdata * value
   > > > D depth 10I 0 value
   > > > D ns 1024A const varying
   > > > D name 1024A const varying
   > > > D path 24576A const varying
   > > > D value 65535A const
   > > > D Attrs * const dim(32767)
   > > > D options(*varsize)
   > > >
   > > > Thomas.
   > > >
   > > >
   > > > ftpapi-bounces@xxxxxxxxxxxxxxxxxxxxxx schrieb am 24.04.2009
   01:50:57:
   > > >
   > > > >
   > > > > Hi Scott,
   > > > >
   > > > >
   > > > >
   > > > > Here's what I believe is the relevant portion of th debuge
   log:
   > > > >
   > > > >
   > > > >
   > > > > SetError() #13: HTTP/1.1 100 Continue
   > > > > senddoc(): entered
   > > > > <soapenv:Envelope
   > > > xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/
   > > > > " xmlns:web="http://www.webservicex.net";> <soapenv:Header/>
   > > > > <soapenv:Body> <web:GetGeoIP> <!--Optional:-->
   <web:IPAddress>209.
   > > > > 131.36.158 </web:IPAddress> </web:GetGeoIP> </soapenv:Body>
   > > > > </soapenv:Envelope>
   > > > > recvresp(): entered
   > > > > HTTP/1.1 200 OK
   > > > > Date: Wed, 22 Apr 2009 22:34:18 GMT
   > > > > Server: Microsoft-IIS/6.0
   > > > >
   > > > > X-Powered-By: ASP.NET
   > > > > X-AspNet-Version: 1.1.4322
   > > > > Cache-Control: private, max-age=0
   > > > > Content-Type: text/xml; charset=utf-8
   > > > > Content-Length: 521
   > > > >
   > > > > SetError() #13: HTTP/1.1 200 OK
   > > > > recvdoc parms: identity 521
   > > > > header_load_cookies() entered
   > > > > recvdoc(): entered
   > > > > SetError() #0:
   > > > > <?xml version="1.0" encoding="utf-8"?><soap:Envelope
   xmlns:soap="
   > > > > http://schemas.xmlsoap.org/soap/envelope/";
   xmlns:xsi="http://www.w3.
   > > > > org/2001/XMLSchema-instance"
   > xmlns:xsd="http://www.w3.org/2001/XMLSchema
   > > > > "><soap:Body><GetGeoIPResponse
   xmlns="http://www.webservicex.net
   > > > > "><GetGeoIPResult><ReturnCode>1</ReturnCode><IP>209.131.36.158
   > > > > </IP><ReturnCodeDetails>Record
   > > > > Found</ReturnCodeDetails><CountryName>UNITED
   > > > >
   > > >
   > >
   >
   STATES</CountryName><CountryCode>US</CountryCode></GetGeoIPResult></Ge
   tGeoIPResponse></soap:
   >
   > > >
   > > > > Body></soap:Envelope>
   > > > > http_close(): entered
   > > > > New iconv() objects set, PostRem=1208. PostLoc=0. ProtRem=819.
   > ProtLoc=0
   > > > > http_persist_open(): entered
   > > > > http_long_ParseURL(): entered
   > > > > DNS resolver retrans: 2
   > > > > DNS resolver retry : 2
   > > > > DNS resolver options: x'00000136'
   > > > > DNS default domain: S105VX7M.COM
   > > > > DNS server found: 68.87.85.98
   > > > > DNS server found: 68.87.69.146
   > > > > http_persist_post(): entered
   > > > > http_long_ParseURL(): entered
   > > > > do_post(): entered
   > > > > POST /geoipservice.asmx HTTP/1.1
   > > > > Host: www.webservicex.net
   > > > > User-Agent: http-api/1.23
   > > > > Content-Type: text/xml; charset=UTF-8
   > > > > SOAPAction: "http://www.webservicex.net/GetGeoIP";
   > > > > Expect: 100-continue
   > > > > Content-Length: 279
   > > > >
   > > > >
   > > > >
   > > > > As you can see, the country name value is "UNITED STATES". The
   > > > > returned XML looks ok to me, but by the time the MapXmlData
   > > > > Procedure gets ahold of the parsed values, it's all garbage,
   which
   > > > > is why the if construct that tests for the "name" variable to
   be the
   > > > > value 'CountryName' is never satisfied, and even if it were,
   the
   > > > > value of variable "value" is also garbage.
   > > > >
   > > > >
   > > > >
   > > > > P MapXmlData B
   > > > > D MapXmlData PI
   > > > > D country 52a varying
   > > > > D depth 10I 0 value
   > > > > D name 1024A varying const
   > > > > D path 24576A varying const
   > > > > D value 65535A varying const
   > > > > D attrs * dim(32767)
   > > > > D const options(*varsize)
   > > > >
   > > > > /free
   > > > > if (name = 'CountryName');
   > > > > country = value;
   > > > > endif;
   > > > > /end-free
   > > > > P E
   > > > >
   > > > >
   > > > > Is it possible that my EXPAT setup is incorrect, or mismatched
   > > > > somehow with my HTTPAPI install (ver 1.23)? I'm pretty certain
   I
   > > > > downloaded and installed the precompiled version of EXPAT
   (version
   > > > > 2.0.0 in SAVF format). I would really appreciate some help in
   > > > > figuring this out.
   > > > >
   > > > >
   > > > >
   > > > > Thanks,
   > > > >
   > > > >
   > > > >
   > > > > Rich
   > > > >
   > > > >
   > > > >
   > > > >
   > > > >
   > > > >
   > > > >
   > > > >
   > > > >
   > > > > EMAILING FOR THE GREATER GOOD
   > > > > Join me
   > > > >
   > > > >
   > > > >
   > > > > > Date: Wed, 22 Apr 2009 20:36:17 -0500
   > > > > > From: sk@xxxxxxxxxxxxxxxx
   > > > > > To: ftpapi@xxxxxxxxxxxxxxxxxxxxxx
   > > > > > Subject: Re: HTTPAPI returns a "Host name look up failed"
   > > > > >
   > > > > > Hi Rich,
   > > > > >
   > > > > > Create a debug log (like you did before) and look at what is
   being
   > > > > > received from the web service -- the details will be in that
   debug
   > > > file.
   > > > > >
   > > > > >
   > > > > >
   > > > > > Rich Kitterman wrote:
   > > > > > > Hi Scott,
   > > > > > > > Just in case you didn't understand this: Your messages
   are
   > going to
   > > > > > > a
   > > > > > > > public mailing list. All participants on the mailing
   list can
   > read
   > > > > > > > them. I'm able to read your response to Michael Ryan,
   you don't
   > > > have
   > > > > > > to
   > > > > > > > repeat it.
   > > > > > > Thanks for the clarification. I understand that the
   > correspondence
   > > > > > > gets bounced to all on the public mailing list. I just
   didn't
   > know if
   > > > > > > you personally were following every piece, so as a
   courtesy I
   > > > repeated
   > > > > > > it.
   > > > > > > > Here's why I would not have suspected that: You told me
   that a
   > PING
   > > > > > > > worked. PING uses the same DNS resolver (configured with
   CFGTCP
   > 12)
   > > > > > > > that HTTPAPI. Why did it work for PING and not for
   HTTPAPI?
   > > > > > > I was pinging with the same IP address I gave GEOIP as a
   parm. I
   > > > > > > think my confusion with the error message is in
   understanding
   > what
   > > > > > > host name was actually being looked up. Did the error have
   > reference
   > > > > > > to the target IP address I was trying to get GEOIP to
   return a
   > > > country
   > > > > > > name for, or was it referring to something else? I suspect
   the
   > > > > > > latter.
   > > > > > >
   > > > > > > > Hard to say. You really haven't provided any information
   other
   > than
   > > > > > > > "something didn't work". Check the XML that was returned
   from
   > the
   > > > > > > web
   > > > > > > > service and see if it contains the country name. If it
   was,
   > then
   > > > the
   > > > > > > > problem is in the way your interfacing to the XML
   parser.
   > > > > > > I agree. The problem is that I'm ignorant enough that I'm
   not
   > sure
   > > > > > > where (which HTTPAPI module or procedure) to look for the
   XML
   > string
   > > > > > > coming back from the web service. If you can point me in
   the
   > right
   > > > > > > direction, I'd be grateful. What I did determine is that
   when I
   > go to
   > > > > > >
   [1]http://www.webservicex.net/geoipservice.asmx?op=GetGeoIP and
   > test
   > > > > > > the same IP address I pass to GEOIP, the XML I get back
   is:
   > > > > > >
   > > > > > > <?xml version="1.0" encoding="utf-8" ?>
   > > > > > > - <GeoIP xmlns:xsd="[2]http://www.w3.org/2001/XMLSchema";
   > > > > > > xmlns:xsi="[3]http://www.w3.org/2001/XMLSchema-instance";
   > > > > > > xmlns="[4]http://www.webservicex.net";>
   > > > > > > <ReturnCode>1</ReturnCode>
   > > > > > > <IP>209.131.36.158</IP>
   > > > > > > <ReturnCodeDetails>Record Found</ReturnCodeDetails>
   > > > > > > <CountryName>UNITED STATES</CountryName>
   > > > > > > <CountryCode>US</CountryCode>
   > > > > > > </GeoIP>
   > > > > > >
   > > > > > > I appreciate your patience, as you can see I'm completely
   a
   > novice
   > > > > > > with this.
   > > > > >
   >
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References

   1. http://im.live.com/Messenger/IM/Home/?source=EML_WLHM_GreaterGood
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