[Python] Using FastAPI in a sync way, how can I get the raw body of a POST request?

Using FastAPI in a sync, not async mode, I would like to be able to receive the raw, unchanged body of a POST request.

All examples I can find show async code, when I try it in a normal sync way, the request.body() shows up as a coroutine object.

When I test it by posting some XML to this endpoint, I get a 500 "Internal Server Error".

from fastapi import FastAPI, Response, Request, Body

app = FastAPI()

@app.get("/")
def read_root():
return {"Hello": "World"}

@app.post("/input")
def input_request(request: Request):
# how can I access the RAW request body here?
body = request.body()

# do stuff with the body here

return Response(content=body, media_type="application/xml")


Is this not possible with FastAPI?

Note: a simplified input request would look like:

POST http://127.0.0.1:1083/input
Content-Type: application/xml

<XML>
<BODY>TEST</BODY>
</XML>


and I have no control over how input requests are sent, because I need to replace an existing SOAP API.

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