Difference between revisions of "URI Resolver"
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The URI Resolver is an HTTP URI resolver implemented as an HTTP servlet which gives access trough HTTP to different protocols URIs. | The URI Resolver is an HTTP URI resolver implemented as an HTTP servlet which gives access trough HTTP to different protocols URIs. | ||
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=== SMP Resolver === | === SMP Resolver === |
Revision as of 07:17, 25 April 2013
The URI Resolver is an HTTP URI resolver implemented as an HTTP servlet which gives access trough HTTP to different protocols URIs.
Contents
SMP Resolver
The first version of the component is able to give HTTP resolution to SMP protocol URIs [1].
Once deployed in a servlet container as Tomcat, the servlet can be used to resolve SMP URIs as follows:
URL url = new URL("http://<hostname>:<port>/uri-resolver/smp?smp-uri=smp://.....);
The HTTP URI can be also used to retrieve files using wget or trough a Web Browser.. just click on the link :
http://dev.d4science.org/uri-resolver/smp?smp-uri=smp://Wikipedia_logo_silver.png?5ezvFfBOLqaqBlwCEtAvz4ch5BUu1ag3yftpCvV+gayz9bAtSsnO1/sX6pemTKbDe0qbchLexXeWgGcJlskYE8td9QSDXSZj5VSl9kdN9SN0/LRYaWUZuP4Q1J7lEiwkU4GKPsiD6PDRVcT4QAqTEy5hSIbr6o4Y
Runtime Resource
The address and the configuration information of the servlet are registered on the gCube Information System as Runtime Resource. This in an example of the Runtime Resource to configure:
<Profile> <Category>Service</Category> <Name>HTTP-URI-Resolver</Name> <Description>HTTP URI Resolver</Description> <Platform> <Name>tomcat</Name> <Version>6</Version> <MinorVersion>0</MinorVersion> <RevisionVersion>0</RevisionVersion> <BuildVersion>0</BuildVersion> </Platform> <RunTime> <HostedOn>dev.d4science.org</HostedOn> <GHN UniqueID="" /> <Status>READY</Status> </RunTime> <AccessPoint> <Description>SMP URI Resolver</Description> <Interface> <Endpoint EntryName="smp">http://dev.d4science.org/uri-resolver/smp</Endpoint> </Interface> <AccessData> <Username /> <Password>6vW1u92cpdgHzYAgIurn9w==</Password> </AccessData> <Properties> <Property> <Name>parameter</Name> <Value encrypted="false">smp-uri</Value> </Property> </Properties> </AccessPoint> </Profile>
Query
The following code snippet can be used to retrieve from the gCube Information System the info to configure the resolver
ScopeProvider.instance.set(<scope>); XQuery query = queryFor(ServiceEndpoint.class); query.addCondition("$resource/Profile/Name/text() eq 'HTTP-URI-Resolver'").setResult("$resource/Profile/AccessPoint"); DiscoveryClient<AccessPoint> client = clientFor(AccessPoint.class); List<AccessPoint> endpoints = client.submit(query); if (endpoints.size() == 0) throw new Exception("No Resolver available"); //Base Address System.out.println(endpoints.get(0).address()); //Query URL parameter System.out.println(endpoints.get(0).propertyMap().get("parameter").value());