XML-RPC

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XML-RPC

• Mohammad Ali Bahrami
• Meysam Roostaee

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Client and Server have to understand each other.

• Wieviel Uhr
• ist es?

?
Client
Server
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XML is a common language to transmit data
Encode
Decode
Java C Python etc.
Java C Python etc.
XML
Client
Server
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What is RPC?

• RPC means Remote Procedure Call, that means you
  call a procedure (function) on a different
  machine.
• RPC is a powerful technique for constructing
  distributed, client-server based applications.
• By using RPC, programmers of distributed
  applications avoid the details of the interface
  with the network.

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What is XML-RPC?

• It's remote procedure calling using HTTP as the
  transport and XML as the encoding. XML-RPC is
  designed to be as simple as possible, while
  allowing complex data structures to be
  transmitted, processed and returned.

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XML-RPC Architecture
HTTP
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XML-RPC Architecture

• Client-server architecture
• Client executes RPCs on the server
• Server has 3 components
• The main thread
• The XML-RPC server (takes place of stubs)
• One or more RPC handlers
• Server processes each RPC by calling the
  corresponding RPC handler

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• Languages include C/C, Java, Perl, Python,
  Frontier, Lisp, PHP, Microsoft .NET, Rebol, Real
  Basic, Tcl, Delphi, WebObjects and Zope
• XML-RPC Types
• integer, boolean, string, double, date
  time, base64 binaries, structs, arrays

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Executing an XML-RPC

• 1. Build a list of RPC parameters
• Analogous to function/method parameters
• 2. Initialize the RPC
• Name of the RPC
• URL (its HTTP) of the XML-RPC server
• http//addressport/RPC2
• 3. Execute the RPC
• 4. Handle errors
• 5. Interpret return value

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Creating an XML-RPC Server

• 1. Define one or more RPC handlers
• C Subclass xmlrpc_cmethod
• Java Create a new public class
• 2. Initialize the librarys server object
• Provide port number on which to listen
• 3. Add RPC handlers to the server
• Library-specific call
• 4. Start the server
• Optionally create new thread for server

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XML-RPC

• Implementation on C

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Add libraries

• System.RunTime.Serialization
• System.RunTime.Serialization.Formatters.Soap

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Serialize with xml-soap

• SoapFormatter soap new SoapFormatter()
• FileStream stnew FileStream ("C\\Test.xml" ,
  FileMode.OpenOrCreate)
• Person p new Person("Meysam Roostaee",22)Soap.
  Serialize(st, p)
• st.Close()

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Deserialize with xml-soap

• SoapFormatter soap new SoapFormatter
• FileStream st new FileStream ("C\\Test.xml",Fil
  eMode.Open)
• Person p soap.Deserialize(st) as Person
• st.Close()

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Concept
Client
Client
Response
Request
Request
Request
Client
Client
Client
Server
Response
Response
Response
Request
Client
Client
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Send request and get result
Send byte variable to server by network
Client
Serialize to xml file
Wait for server
Read xml file in bytes
Object
Calculate and save result in DB and send result
to client
Save data in file with xml extesion
Server
Deserialize xml file
Wait for client
get bytes from network
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Database
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Excute Program

• Server Application
• Client Application

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Refrence

• www.XMLRPC.com
• Advanced C programming- Raul kimmel
• XML in C - gholamreza saberi
• An Introduction to Programming with C Threads
  Andrew D. Birrell