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[[Image:accessgate-architecture.png|thumb|Architecture]] The SPACE Access Gate is a small, reusable proxy for operation-centric service calls. In other words, it can redirect and intercept SOAP connections over HTTP. There are three main reasons why this is being done: To check the user's permission to invoke a service through authentication and authorisation, to monitor invocation-level metrics like the response times and payload transmissions, and to use this data for possible postprocessing steps such as billing purposes in commercial environments. A web interface exists for the administration of backend service mappings, including a TinySecUrl mapper. Note that for resource-centric services, any authenticating HTTP proxy could be used in lieu of Access Gate. === Technologies === The proxy is written in [http://www.php.net/ PHP]. It uses the PHP database abstraction layer to connect to databases for user lookups, monitoring storage and service mappings. Authentication is supported through the password and digest variants of the WS-Security username token profile. === Scientific Material and Documentation === Access Gate comes with a [http://serviceplatform.org/wiki/Image:Accessgate.pdf manual]. Some blog posts are available: [http://www.kuarepoti-dju.net//blog/2009-08-14-tinysecurl/], [http://www.kuarepoti-dju.net//blog/2009-01-17-clouds/] No scientific publications related to Access Gate available yet. See also [[Access Gate/Related|related work]]. === Download/Version Control === Before a stable release becomes available, a Git checkout from the [[Code Repository]] will be required. Alternatively, a pre-packaged snapshot version can be installed. See [[Package Repository]] for details. * Package installation: <code>% apt-get install access-gate</code> * Git checkout: <code>% git clone http://serviceplatform.org/code/.git</code> * Git browsing: http://serviceplatform.org:8000/trac/browser/platform-services/access-gate

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