This package helps to create Soap WebServices using FastAPI (What?!?!)
I know, FastAPI is a REST micro framework, but sometimes is needed to expose a Soap Interface on a already running FastAPI application for an legacy client/application that only supports, well, the Soap protocol...
Only FastAPI, Pydantic and Pydantic XML are required.
from fastapi import FastAPI
from pydantic_xml import element
from fastapi_soap import SoapRouter, XMLBody, SoapResponse
from fastapi_soap.models import BodyContent
class Operands(BodyContent, tag="Operands"):
operands: list[float] = element(tag="Operand")
class Result(BodyContent, tag="Result"):
value: float
soap = SoapRouter(name='Calculator', prefix='/Calculator')
@soap.operation(
name="SumOperation",
request_model=Operands,
response_model=Result
)
def sum_operation(body: Operands = XMLBody(Operands)):
"""
Receives an Operands object and returns a Result object.
Args:
body (Operands): Operands object with a list of operands
"""
result = sum(body.operands)
return SoapResponse(
Result(value=result)
)
app = FastAPI()
app.include_router(soap)
if __name__ == '__main__':
import uvicorn # Any Python ASGI web server can be used
uvicorn.run("example.main:app")(This script is complete, it should run "as is")
The WSDL is available on webservice root path for GET method.
GET http://localhost:8000/Calculator?wsdl
XML Request
<soapenv:Envelope
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Body>
<Operands>
<!--Zero or more repetitions:-->
<Operand>1</Operand>
<Operand>2</Operand>
<Operand>3</Operand>
</Operands>
</soapenv:Envelope>For this example, the sum_operation function will receive an Pydantic object as body
print(body)
# Output Operands(operands=[1.0, 2.0, 3.0])
print(body.operands)
# Output [1.0, 2.0, 3.0]
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