Accept request body of "application/octet-stream" type?

[hongquan]

Hi.

Is there any way to define handler that accept request body of "application/octet-stream" type?

I tried

async def flash_firmware(self, data: Annotated[UploadFile, Body(media_type='application/octet-stream')]) -> FirmwareUploadResponse

and

async def flash_firmware(self, data: Annotated[bytes, Body(media_type='application/octet-stream')]) -> FirmwareUploadResponse

But always get JSON is malformed: invalid character (byte 0) error reponse. Litestar keeps trying to decode request body as JSON.

The reason I want this feature is to implement OTA firmware update for ESP32 chip. Due to limit of RAM, I cannot afford any deserializtion, nor validation feature, and can only expect the client to upload proper binary file. The Python code here is to make a mock server for developing web frontend. The actual backend code will be in Rust, based on ESP-IDF framework.

[provinzkraut]

Can you post a full example of your code with the first example? That should work afaik.

Anyway, if you don't want all validation, you'll have to skip injecting the body via the body parameter, since this will always validate, even if it's just bytes. You can get the raw body though Request.body():

async def flash_firmware(request: Request) -> FirmwareUploadResponse:
    body = await request.body()

[Alc-Alc]

to add to this, you can directly have body injected as mentioned here https://docs.litestar.dev/latest/usage/routing/handlers.html#reserved-keyword-arguments

async def flash_firmware(body: bytes) -> FirmwareUploadResponse:
    body

[provinzkraut]

Yeah.. Do that instead. Thanks @Alc-Alc! I sometimes forget about features we have :)

[hongquan]

Thanks, the signature

async def flash_firmware(body: bytes) -> FirmwareUploadResponse:
    body

works!