post route + field with base64 content

[dielandre]

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Example Code

APP

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse

import logging
from starlette.middleware.base import BaseHTTPMiddleware
import binascii
import json
import base64

from modulo1.routes import router as modulo1_router

app = FastAPI()

class FixJSONMiddleware(BaseHTTPMiddleware):
    async def dispatch(self, request: Request, call_next):
        # Ler o corpo da requisição original
        body = await request.body()
        print(body)
        body_str = body.decode('ascii')
        print(body_str)
        
        # Remover barras invertidas extras e corrigir barras duplas dentro de valores
        corrected_body_str = body_str.replace(r'\\', '\\').replace(r'\/', '/')

        # Substituir o corpo da requisição com a versão corrigida
        request._body = corrected_body_str.encode('utf-8')

        # Continue com a próxima etapa do processamento da requisição
        response = await call_next(request)
        return response
    
app.include_router(modulo1_router, prefix="/wisedoc", tags=["wisedoc"])
app.add_middleware(FixJSONMiddleware)


route

@router.post("/laudos/integracao")
def integracao(aLaudo: Tlaudo, dados_usuario: dict = Depends(del_bearer_authorization)):
   tipo_id = dados_usuario.get("identtipo")
   usuario_id = dados_usuario.get("identvalor")
   return atualizalaudo(aLaudo)

class

class Tlaudo(BaseModel):
    status: str
    accession_number: str
    paciente_id: str
    study_instance_uid: str
    laudo_conteudo: Optional[str]
    laudo_datahora: Optional[str]
    realizante_nome: Optional[str]
    realizante_crm: Optional[str]
    realizante_crm_uf: Optional[str]
    realizante_assinatura: Optional[str]
    revisor_nome: Optional[str]
    revisor_crm: Optional[str]
    revisor_crm_uf: Optional[str]
    revisor_assinatura: Optional[str]

Description

I have a post route that receives a tlaudo class

This class has a field that receives base64 content

when the field comes with "//" fastapi truncates the body

json sent by client

{"status":"L" .20240426164328 ","report_content":"+Q6Wuqp8FCqwApdu3QBX3zmqafBtFfPuyyCu5MVCkXABCC//==","report_datahora":"02/05/2024 08:56:12","performer_name":"Radiologist Test","realizador_crm":"40134","realizador_crm_uf":"RS","realizador_assinatura":null,"revisor_nome":null,"revisor_crm": null,"revisor_crm_uf":null,"revisor_assinatura":null}

truncated json

INFO: Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)

report_conteudo\":\"+Q6Wuqp8FCqwApdu3QBX3zmqafBtFfPuyyCu5MVCkXABCC'
{"status":"L" .20240426164328 ","report_conteudo":"+Q6Wuqp8FCqwApdu3QBX3zmqafBtFfPuyyCu5MVCkXABCC

INFO: 127.0.0.1:51661 - "POST /wisedoc/laudos/integracao HTTP/1.1" 422 Unprocessable Entity

Operating System

Windows

Operating System Details

in Linux it also happens

FastAPI Version

0.110.2

Pydantic Version

2.7.0

Python Version

Python 3.12.1

Additional Context

No response

[achempak-polymer]

This is invalid json. Specifically this part:

"status":"L" .20240426164328 "

I'm not sure if the quote after the L is intentional or not, but if it is, then it needs to be escaped:

{
   "status":"L\" .20240426164328 ",
   "report_content":"+Q6Wuqp8FCqwApdu3QBX3zmqafBtFfPuyyCu5MVCkXABCC//==",
   "report_datahora":"02/05/2024 08:56:12",
   "performer_name":"Radiologist Test",
   "realizador_crm":"40134",
   "realizador_crm_uf":"RS",
   "realizador_assinatura":null,
   "revisor_nome":null,
   "revisor_crm":null,
   "revisor_crm_uf":null,
   "revisor_assinatura":null
}

[dielandre]

I pasted the wrong json, sorry

json correct

{
"status":"L",
"report_content":"+Q6Wuqp8FCqwApdu3QBX3zmqafBtFfPuyyCu5MVCkXABCC//==",
"report_datahora":"02/05/2024 08:56:12",
"performer_name":"Radiologist Test",
"realizador_crm":"40134",
"realizador_crm_uf":"RS",
"realizador_assinatura":null,
"revisor_nome":null,
"revisor_crm":null,
"revisor_crm_uf":null,
"revisor_assinatura":null
}

the problem is where it is //

fastapi truncates, and postman also truncates