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