Usage
XML-RPC works by sending a HTTP request to a server implementing the protocol. The client in that case is typically software wanting to call a single method of a remote system. Multiple input parameters can be passed to the remote method, one return value is returned. The parameter types allow nesting of parameters into maps and lists, thus larger structures can be transported. Therefore XML-RPC can be used to transport objects or structures both as input and as output parameters.
Identification of clients for authorization purposes can be achieved using popular HTTP security methods. Basic access authentication is used for identification, HTTPS is used when identification (via certificates) and encrypted messages are needed. Both methods can be combined.
In comparison to REST, where resource representations (documents) are transferred, XML-RPC is designed to call methods.
XML-RPC is simpler to use and understand than SOAP because it
- allows only one method of method serialization, whereas SOAP defines multiple different encodings
- has a simpler security model
- does not require (nor support) the creation of WSDL service descriptions, although XRDL provides a simple subset of the functionality provided by WSDL
JSON-RPC is similar to XML-RPC.
Read more about this topic: XML-RPC
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