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MPS_XML

Page history last edited by Juri Strumpflohner 16 years, 5 months ago

MPS Communication

Information exchange between the Client and Server

 

The communication between the mobile client and the server are done by exchanging XML documents over the HTTP protocol. I divided the XML documents into

  • XML strings from the mobile client to the server (Requests)

  • XML strings from the server to the client (Responses)

 


 

Requests

Request documents are defined by the following DTD:

<!DOCTYPE root [

  <!ELEMENT root (type , validationData , requestBody)>

  <!ELEMENT type (#PCDATA)>

  <!ELEMENT validationData (user , password)>

  <!ELEMENT user (#PCDATA)>

  <!ELEMENT password (#PCDATA)>

  <!ELEMENT requestBody (comment | post)>

  <!ELEMENT comment (postid , content , user)>

  <!ELEMENT postid (#PCDATA)>

  <!ELEMENT content (#PCDATA)>

  <!ELEMENT post (id , title , body , isGlobal , user , location?)>

  <!ELEMENT id (#PCDATA)>

  <!ELEMENT title (#PCDATA)>

  <!ELEMENT body (#PCDATA)>

  <!ELEMENT isGlobal (#PCDATA)>

  <!ELEMENT location (cellid , lat , lon)>

  <!ELEMENT cellid (#PCDATA)>

  <!ELEMENT lat (#PCDATA)>

  <!ELEMENT lon (#PCDATA)>

]>

 

The type of the document differs depending on the operation that has to be done. The following types are allowed:

  • commit:post

  • retrieve:post (parameters: all, personal, location:cellid, search)

  • delete:post

  • commit:postcomment

 

 

 

 

Responses

XML responses from the server to the client are defined by the following DTD:

<!DOCTYPE root [

  <!ELEMENT root (type , responseBody)>

  <!ELEMENT type (#PCDATA)>

  <!ELEMENT responseBody (post+ | (level, message))>

  <!ELEMENT post (id , title , body , isGlobal , creationDate , expiryDate , user , comments*)>

  <!ELEMENT id (#PCDATA)>

  <!ELEMENT title (#PCDATA)>

  <!ELEMENT body (#PCDATA)>

  <!ELEMENT isGlobal (#PCDATA)>

  <!ELEMENT creationDate (#PCDATA)>

  <!ELEMENT expiryDate (#PCDATA)>

  <!ELEMENT user (#PCDATA)>

  <!ELEMENT comments (comment)*>

  <!ELEMENT comment (id , content , user)>

  <!ELEMENT content (#PCDATA)>

  <!ELEMENT level (#PCDATA)>

  <!ELEMENT message (#PCDATA)>

]>

 

XML responses from the server can have the following types:

  • data:post

  • alert (levels: Error, Info)

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