XML-RPC (XML "„Remote Procedure Call "“) is a specification, which permits it to software on different systems and under different environments to communicate with one another over a TCP/IP-based network. Almost all today well-known programming languages are supported. For usual programming languages there are libraries, which convert the code into XML-RPC:

• Representation of the data types
• Generation call/Replypaktes
• Realization of calls
• Transfer of the packets

One communicates, like the name already says with remote Prozeduren-Aufruf about HTTP, or in the object-oriented world: a call remote method. The difference to the conventional RPC is that with XML-RPC the parameters of the method and the result, the return value of the method, will thus transfer internally over XML.

The following data types are supported with the methods:

• int, doubles, boolean, stringer, DateTime-iso8601, Base64-String (byte stream)

For more exact results one can pack the result also into a structure (struct). Structure is in this case a key (stringer) - VALUE (arbitrary mentioned above data type) - pair. This structure is packed in an upward open array. In Java as HashTable realizes.

Example of an inquiry

xml version= " 1,0 " > <methodCall> <methodName>warenkorb.addPosition</methodName> <params> <param> <value>Monitor</value> </param> <param> <value><int>10</int></value> </param> </params> </methodCall>

Code example: Linux documentation Project

See also: SOAP, CORBA, DCOM, Web service

Related links

• Official starting side (English)
• XML RPC forum (English)
• Guidances (English)
• Technology reports (English)
• Implementations for
  • C and C++
  • C (as PHP extension available)
  • C++
  • Java
  • Java
  • PHP, also as PEAR package XML_RPC
  • ASP
  • TCL
  • Delphi
  • Ruby
  • Python
  • Perl
  • Flash
  • Javascript (for Mozilla products)

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