{"id":509,"date":"2005-11-29T21:20:58","date_gmt":"2005-11-29T21:20:58","guid":{"rendered":"http:\/\/beta.robertprice.co.uk\/robblog\/2005\/11\/using_soap_lite_with_perl-shtml\/"},"modified":"2005-11-29T21:20:58","modified_gmt":"2005-11-29T21:20:58","slug":"using_soap_lite_with_perl-shtml","status":"publish","type":"post","link":"https:\/\/www.robertprice.co.uk\/robblog\/using_soap_lite_with_perl-shtml\/","title":{"rendered":"Using SOAP::Lite With Perl"},"content":{"rendered":"

\nI’ve been trying to access a SOAP<\/a> service using Perl<\/a> for a project, so I took a quick look at CPAN<\/a> to see what was available. The answer seemed to be to use SOAP::Lite<\/a>.\n<\/p>\n

\nThis module turned out to be a real devil to use, and my problems with it were probably compounded by my lack of SOAP experience.\n<\/p>\n

\nSOAP<\/acronym> (incase you didn’t know) is a method of accessing remote services using XML<\/acronym>. In my case, I was trying to access content supplied by a third party ringtone provider using SOAP over HTTP<\/acronym>.\n<\/p>\n

\nUsing SOAP::Lite<\/code> you have to specify a uri<\/var> and a proxy<\/var>. What stumped me for a while is that the proxy<\/var> is the URI of service you wish to access, and uri<\/var> is the namespace of the service.\n<\/p>\n

\nSo if the provider I was using had their SOAP service available at ws.robstones-services.co.uk\/external.asmx, I would use this as the proxy<\/var>, and in this case I would use ws.robstones-services.co.uk\/External as the uri<\/var>namespace.\n<\/p>\n

\nGreat, I knew the service I needed was called getCallList<\/code>, and required a Username and Password to be passed to it. In return it would give me a list of valid content types. The SOAPAction<\/var> header to be added to the call to proxy<\/var>, letting the remote SOAP service I wanted to use the service http:\/\/ws.robstones-services.co.uk\/External\/getCallList.\n<\/p>\n

\nMy first attempt was the following code…\n<\/p>\n

#!\/usr\/bin\/perl -w
\nuse strict;
\nuse SOAP::Lite 'trace', 'debug';
\nmy $server = SOAP::Lite
\n->uri('http:\/\/ws.robstones-services.co.uk\/External')
\n->proxy('http:\/\/ws.robstones-services.co.uk\/external.asmx');
\nmy $returned = $server
\n->getCallList({
\n'Username' => 'RobsUser',
\n'Password' => 'RobsPassword'
\n});
\nforeach my $type ($returned->valueof('\/\/getCallListResult\/string')) {
\nnext unless ($type); ## ignore any undefs
\nprint \"$typen\";
\n}
\n<\/code><\/div>\n

\nYou’ll notice I’m using trace<\/var> and debug<\/var> to see the SOAP messages being sent and received. The dialogue from this script was…\n<\/p>\n

> perl -w test.pl
\nSOAP::Transport::HTTP::Client::send_receive: POST http:\/\/ws.robstones-services.co.uk\/external.asmx HTTP\/1.1
\nAccept: text\/xml
\nAccept: multipart\/*
\nContent-Length: 615
\nContent-Type: text\/xml; charset=utf-8
\nSOAPAction: \"http:\/\/ws.robstones-services.co.uk\/External#getCallList\"
\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><SOAP-ENV:Envelope xmlns:xsi=\"http:\/\/www.w3.org\/1999\/XMLSchema-instance\" xmlns:SOAP-ENC=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:xsd=\"http:\/\/www.w3.org\/1999\/XMLSchema\" SOAP-ENV:encodingStyle=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:SOAP-ENV=\"http:\/\/schemas.xmlsoap.org\/soap\/envelope\/\"><SOAP-ENV:Body><namesp1:getCallList xmlns:namesp1=\"http:\/\/ws.robstones-services.co.uk\/External\"><c-gensym3><Username xsi:type=\"xsd:string\">RobsUser<\/Username><Password xsi:type=\"xsd:string\">RobsPassword<\/Password><\/c-gensym3><\/namesp1:getCallList><\/SOAP-ENV:Body><\/SOAP-ENV:Envelope>
\nSOAP::Transport::HTTP::Client::send_receive: HTTP\/1.1 500 (Internal Server Error) Internal Server Error.
\nCache-Control: private
\nConnection: close
\nDate: Tue, 29 Nov 2005 15:23:38 GMT
\nServer: Microsoft-IIS\/6.0
\nContent-Length: 508
\nContent-Type: text\/xml; charset=utf-8
\nClient-Date: Tue, 29 Nov 2005 15:23:09 GMT
\nClient-Response-Num: 1
\nX-AspNet-Version: 1.1.4322
\nX-Powered-By: ASP.NET
\n<?xml version=\"1.0\" encoding=\"utf-8\"?>
\n<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\">
\n<soap:Body>
\n<soap:Fault>
\n<faultcode>soap:Client<\/faultcode>
\n<faultstring>Server did not recognize the value of HTTP Header SOAPAction: http:\/\/ws.robstones-services.co.uk\/External#getCallList.<\/faultstring>
\n<detail \/>
\n<\/soap:Fault>
\n<\/soap:Body>
\n<\/soap:Envelope>
\n<\/code><\/div>\n

\nThe call didn’t work, you’ll see the SOAPAction<\/var> variable is wrong, it’s http:\/\/ws.robstones-services.co.uk\/External#getCallList<\/code> instead of http:\/\/ws.robstones-services.co.uk\/External\/getCallList<\/code>.\n<\/p>\n

\nI needed to get SOAP::Lite to use the correct URL. The secret turned out to be to change the use SOAP::Lite<\/code> line to the following.\n<\/p>\n

use SOAP::Lite on_action => sub {sprintf '%s\/%s', @_},
\n'trace', 'debug';
\n<\/code><\/div>\n

\non_action<\/code> is a parameter SOAP::Lite uses to separate the URI from the action, here we’re telling it to use \/<\/code>.\n<\/p>\n

\nThis gave me the following SOAP dialogue…\n<\/p>\n

> perl -w test.pl
\nSOAP::Transport::HTTP::Client::send_receive: POST http:\/\/ws.robstones-services.co.uk\/external.asmx HTTP\/1.1
\nAccept: text\/xml
\nAccept: multipart\/*
\nContent-Length: 615
\nContent-Type: text\/xml; charset=utf-8
\nSOAPAction: http:\/\/ws.robstones-services.co.uk\/External\/getCallList
\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><SOAP-ENV:Envelope xmlns:xsi=\"http:\/\/www.w3.org\/1999\/XMLSchema-instance\" xmlns:SOAP-ENC=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:xsd=\"http:\/\/www.w3.org\/1999\/XMLSchema\" SOAP-ENV:encodingStyle=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:SOAP-ENV=\"http:\/\/schemas.xmlsoap.org\/soap\/envelope\/\"><SOAP-ENV:Body><namesp1:getCallList xmlns:namesp1=\"http:\/\/ws.robstones-services.co.uk\/External\"><c-gensym3><Username xsi:type=\"xsd:string\">RobsUser<\/Username><Password xsi:type=\"xsd:string\">RobsPassword<\/Password><\/c-gensym3><\/namesp1:getCallList><\/SOAP-ENV:Body><\/SOAP-ENV:Envelope>
\nSOAP::Transport::HTTP::Client::send_receive: HTTP\/1.1 200 OK
\nCache-Control: private, max-age=0
\nConnection: close
\nDate: Tue, 29 Nov 2005 15:22:53 GMT
\nServer: Microsoft-IIS\/6.0
\nContent-Length: 405
\nContent-Type: text\/xml; charset=utf-8
\nClient-Date: Tue, 29 Nov 2005 15:22:25 GMT
\nClient-Response-Num: 1
\nX-AspNet-Version: 1.1.4322
\nX-Powered-By: ASP.NET
\n<?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><getCallListResponse xmlns=\"http:\/\/ws.robstones-services.co.uk\/External\"><getCallListResult><string xsi:nil=\"true\" \/><\/getCallListResult><\/getCallListResponse><\/soap:Body><\/soap:Envelope>
\n<\/code><\/div>\n

\nBugger, it still didn’t work. I looked again at the SOAP message being sent. It was sending a lot of namespace information and a wrapper around the Username<\/var> and Password<\/var>. The wrapper was definitely wrong, and the remote .NET service didn’t seem to like the namespaces.\n<\/p>\n

\nI needed to sort that out, so I had to tell SOAP::Lite to not to include namespaces or wrap up the Username<\/var> and Password<\/var>. The way to do this is to use SOAP::Data<\/code> to hardcode the data being sent.\n<\/p>\n

\nThis meant changing the call to getCallList<\/code> to the following…\n<\/p>\n

my $returned = $server
\n->getCallList(
\nSOAP::Data->name('Username')->value('RobsUser')->type(''),
\nSOAP::Data->name('Password')->value('RobsPassword')->type('')
\n);
\n<\/code><\/div>\n

\nThe SOAP dialogue after these changes looked like this..\n<\/p>\n

SOAP::Transport::HTTP::Client::send_receive: POST http:\/\/ws.robstones-services.co.uk\/external.asmx HTTP\/1.1
\nAccept: text\/xml
\nAccept: multipart\/*
\nContent-Length: 548
\nContent-Type: text\/xml; charset=utf-8
\nSOAPAction: http:\/\/ws.robstones-services.co.uk\/External\/getCallList
\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><SOAP-ENV:Envelope xmlns:xsi=\"http:\/\/www.w3.org\/1999\/XMLSchema-instance\" xmlns:SOAP-ENC=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:xsd=\"http:\/\/www.w3.org\/1999\/XMLSchema\" SOAP-ENV:encodingStyle=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:SOAP-ENV=\"http:\/\/schemas.xmlsoap.org\/soap\/envelope\/\"><SOAP-ENV:Body><namesp1:getCallList xmlns:namesp1=\"http:\/\/ws.robstones-services.co.uk\/External\"><Username>RobsUser<\/Username><Password>RobsPassword<\/Password><\/namesp1:getCallList><\/SOAP-ENV:Body><\/SOAP-ENV:Envelope>
\nSOAP::Transport::HTTP::Client::send_receive: HTTP\/1.1 200 OK
\nCache-Control: private, max-age=0
\nConnection: close
\nDate: Tue, 29 Nov 2005 15:19:49 GMT
\nServer: Microsoft-IIS\/6.0
\nContent-Length: 405
\nContent-Type: text\/xml; charset=utf-8
\nClient-Date: Tue, 29 Nov 2005 15:19:21 GMT
\nClient-Response-Num: 1
\nX-AspNet-Version: 1.1.4322
\nX-Powered-By: ASP.NET
\n<?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><getCallListResponse xmlns=\"http:\/\/ws.robstones-services.co.uk\/External\"><getCallListResult><string xsi:nil=\"true\" \/><\/getCallListResult><\/getCallListResponse><\/soap:Body><\/soap:Envelope>
\n<\/code><\/div>\n

\nClose, but still not right. The problem was with the getCallList itself, it was still trying to use a namespace.\n<\/p>\n

\nThe final solution was to this problem was to not use getCallList<\/code>, but instead to use SOAP::Lite’s call<\/code> method to implicitly set how the function was being called.\n<\/p>\n

\nThe code after making this change was the following…\n<\/p>\n

my $returned = $server
\n->call(SOAP::Data->name('getCallList')->attr({xmlns => 'http:\/\/ws.robstones-services.co.uk\/External'}) =>
\nSOAP::Data->name('Username')->value('RobsUser')->type(''),
\nSOAP::Data->name('Password')->value('RobsPassword')->type('')
\n);
\n<\/code><\/div>\n

\nThis gave me the SOAP dialogue…\n<\/p>\n

> perl -w test_soap.pl
\nSOAP::Transport::HTTP::Client::send_receive: POST http:\/\/ws.robstones-services.co.uk\/external.asmx HTTP\/1.1
\nAccept: text\/xml
\nAccept: multipart\/*
\nContent-Length: 524
\nContent-Type: text\/xml; charset=utf-8
\nSOAPAction: http:\/\/ws.robstones-services.co.uk\/External\/getCallList
\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><SOAP-ENV:Envelope xmlns:xsi=\"http:\/\/www.w3.org\/1999\/XMLSchema-instance\" xmlns:SOAP-ENC=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:xsd=\"http:\/\/www.w3.org\/1999\/XMLSchema\" SOAP-ENV:encodingStyle=\"http:\/\/schemas.xmlsoap.org\/soap\/encoding\/\" xmlns:SOAP-ENV=\"http:\/\/schemas.xmlsoap.org\/soap\/envelope\/\"><SOAP-ENV:Body><getCallList xmlns=\"http:\/\/ws.robstones-services.co.uk\/External\"><Username>RobsUser<\/Username><Password>RobsPassword<\/Password><\/getCallList><\/SOAP-ENV:Body><\/SOAP-ENV:Envelope>
\nSOAP::Transport::HTTP::Client::send_receive: HTTP\/1.1 200 OK
\nCache-Control: private, max-age=0
\nConnection: close
\nDate: Tue, 29 Nov 2005 15:16:07 GMT
\nServer: Microsoft-IIS\/6.0
\nContent-Length: 540
\nContent-Type: text\/xml; charset=utf-8
\nClient-Date: Tue, 29 Nov 2005 15:15:39 GMT
\nClient-Response-Num: 1
\nX-AspNet-Version: 1.1.4322
\nX-Powered-By: ASP.NET
\n<?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><getCallListResponse xmlns=\"http:\/\/ws.robstones-services.co.uk\/External\"><getCallListResult><string>ROBS_JAVA<\/string><string>ROBS_WALL<\/string><string>ROBS_POLY<\/string><string>ROBS_MONO<\/string><string>ROBS_REAL<\/string><string xsi:nil=\"true\" \/><\/getCallListResult><\/getCallListResponse><\/soap:Body><\/soap:Envelope>
\nROBS_JAVA
\nROBS_WALL
\nROBS_POLY
\nROBS_MONO
\nROBS_REAL
\n<\/code><\/div>\n

\nHurrah, after all that effort, I have a list of 5 types of content offered by my third party supplier. I can now go ahead and build my service.\n<\/p>\n

\nSOAP::Lite is a powerful module, but the lack of simple, easy to follow documentation and examples holds it back. I hope this small article helps out other programmers just starting on the SOAP path.<\/p>\n","protected":false},"excerpt":{"rendered":"

I’ve been trying to access a SOAP service using Perl for a project, so I took a quick look at CPAN to see what was available. The answer seemed to be to use SOAP::Lite. This module turned out to be a real devil to use, and my problems with it were probably compounded by my … Continue reading “Using SOAP::Lite With Perl”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[2],"tags":[17,47,75,78,80],"class_list":["post-509","post","type-post","status-publish","format-standard","hentry","category-dev","tag-dev","tag-perl","tag-web-development","tag-work","tag-xml"],"yoast_head":"\nUsing SOAP::Lite With Perl - Robert Price<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.robertprice.co.uk\/robblog\/using_soap_lite_with_perl-shtml\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using SOAP::Lite With Perl - Robert Price\" \/>\n<meta property=\"og:description\" content=\"I’ve been trying to access a SOAP service using Perl for a project, so I took a quick look at CPAN to see what was available. The answer seemed to be to use SOAP::Lite. This module turned out to be a real devil to use, and my problems with it were probably compounded by my … Continue reading "Using SOAP::Lite With Perl"\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.robertprice.co.uk\/robblog\/using_soap_lite_with_perl-shtml\/\" \/>\n<meta property=\"og:site_name\" content=\"Robert Price\" \/>\n<meta property=\"article:published_time\" content=\"2005-11-29T21:20:58+00:00\" \/>\n<meta name=\"author\" content=\"rob\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rob\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/\"},\"author\":{\"name\":\"rob\",\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/#\\\/schema\\\/person\\\/fac6d5b076e0e14e1fb13e15b542a6c5\"},\"headline\":\"Using SOAP::Lite With Perl\",\"datePublished\":\"2005-11-29T21:20:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/\"},\"wordCount\":570,\"keywords\":[\"Dev\",\"Perl\",\"Web Development\",\"Work\",\"XML\"],\"articleSection\":[\"Dev\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/\",\"url\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/\",\"name\":\"Using SOAP::Lite With Perl - Robert Price\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/#website\"},\"datePublished\":\"2005-11-29T21:20:58+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/#\\\/schema\\\/person\\\/fac6d5b076e0e14e1fb13e15b542a6c5\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/using_soap_lite_with_perl-shtml\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Using SOAP::Lite With Perl\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/#website\",\"url\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/\",\"name\":\"Robert Price\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.robertprice.co.uk\\\/robblog\\\/#\\\/schema\\\/person\\\/fac6d5b076e0e14e1fb13e15b542a6c5\",\"name\":\"rob\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6f0eb511179100a4e968abc70403e33686e6ab3e992e392bedd2ccac01da666c?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6f0eb511179100a4e968abc70403e33686e6ab3e992e392bedd2ccac01da666c?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6f0eb511179100a4e968abc70403e33686e6ab3e992e392bedd2ccac01da666c?s=96&d=mm&r=g\",\"caption\":\"rob\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Using SOAP::Lite With Perl - Robert Price","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.robertprice.co.uk\/robblog\/using_soap_lite_with_perl-shtml\/","og_locale":"en_GB","og_type":"article","og_title":"Using SOAP::Lite With Perl - Robert Price","og_description":"I’ve been trying to access a SOAP service using Perl for a project, so I took a quick look at CPAN to see what was available. 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