http_exception_handler() — fastapi Function Reference

Architecture documentation for the http_exception_handler() function in exception_handlers.py from the fastapi codebase.

Function python FastAPI Routing calls 1 called by 1

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FastAPI→ Routing→ http_exception_handler() — fastapi Function Reference

Dependency Diagram

graph TD
  b7aaa327_256c_826b_6da4_7f2714292af0["http_exception_handler()"]
  2d259205_f589_7dee_455a_60e1c67ed35e["exception_handlers.py"]
  b7aaa327_256c_826b_6da4_7f2714292af0 -->|defined in| 2d259205_f589_7dee_455a_60e1c67ed35e
  13e50071_8b14_4f66_6cc3_c17c1e0899ac["custom_http_exception_handler()"]
  13e50071_8b14_4f66_6cc3_c17c1e0899ac -->|calls| b7aaa327_256c_826b_6da4_7f2714292af0
  dba5a7c0_1fab_8f88_2c80_2b79c3b3dc47["is_body_allowed_for_status_code()"]
  b7aaa327_256c_826b_6da4_7f2714292af0 -->|calls| dba5a7c0_1fab_8f88_2c80_2b79c3b3dc47
  style b7aaa327_256c_826b_6da4_7f2714292af0 fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

fastapi/exception_handlers.py lines 11–17

async def http_exception_handler(request: Request, exc: HTTPException) -> Response:
    headers = getattr(exc, "headers", None)
    if not is_body_allowed_for_status_code(exc.status_code):
        return Response(status_code=exc.status_code, headers=headers)
    return JSONResponse(
        {"detail": exc.detail}, status_code=exc.status_code, headers=headers
    )