XML-RPC Fault Format

XML-RPC is a remote procedure call (RPC) protocol that uses XML to encode its calls and HTTP as a transport mechanism. If an error occurs during an XML-RPC call, you will receive a fault object in response. This fault object provides information about the error that occurred.

Structure of an XML-RPC Fault

The XML-RPC fault is a structured XML element that includes the following elements:

<fault>
  <value>
    <struct>
      <member>
        <name>faultCode</name>
        <value><int>code</int></value>
      </member>
      <member>
        <name>faultString</name>
        <value><string>message</string></value>
      </member>
    </struct>
  </value>
</fault>

The fault element contains a value element that holds a struct element. The struct element contains two members: faultCode and faultString. The faultCode member contains an integer value that represents the error code, while the faultString member contains a string that provides a brief description of the error.

Example of an XML-RPC Fault

Here is an example of an XML-RPC fault:

<fault>
  <value>
    <struct>
      <member>
        <name>faultCode</name>
        <value><int>404</int></value>
      </member>
      <member>
        <name>faultString</name>
        <value><string>Page not found</string></value>
      </member>
    </struct>
  </value>
</fault>

In this example, the error code is 404, which indicates that the requested page cannot be found. The message associated with this error is "Page not found".

Handling XML-RPC Faults

When you receive an XML-RPC fault, you should parse the fault object to extract the error code and message. You can then use this information to determine how to handle the error in your code.

Here is an example of how to handle an XML-RPC fault in Python:

import xmlrpc.client

url = 'http://example.com/api'

try:
    server = xmlrpc.client.ServerProxy(url)
    result = server.someMethod()
except xmlrpc.client.Fault as error:
    print("Error code:", error.faultCode)
    print("Error message:", error.faultString)

In this example, we are using the xmlrpc.client module in Python to make an XML-RPC call to a remote API. If an error occurs during the call, we catch the xmlrpc.client.Fault exception and print out the error code and message. You can then use this information to determine how to handle the error in your code.