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+# SAS/APS server
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+The SAS and APS server are both running a JAVA servlet. I combined them in one .war file.
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+The servers ALWAYS respond with a JSON answer and ONLY accept a POST JSON request.
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+
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+## SAS
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+The SAS server is open to the internet because user must be able to send there connection response to the server.
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+The servet takes care of the following:
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+
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+- Disallow GET requests
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+- Validate incoming POST JSON
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+- Forwards Authentication request to APS
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+ - If response contains user info then a PUSH notification can be send to the registerd device
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+ - If response does not contain user info then send an email with the steps to install and register the app/device
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+- Forwards register request to APS and forward APS response to device
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+- Forward unregister request to APS
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+- Handles the confirm request from the device (approved, cancelled)
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+
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+## APS
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+The APS server validates the user credentials and is the connection to the LDAP directory.
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+The server handles the following:
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+
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+- Disallow GET requests
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+- Validate incoming POST JSON
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+- Answers authentication requests
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+- Sends email messages
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+- Registers devices in the LDAP directory
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+- Unregisters devices in the LDAP directory
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Deben Oldert