Fetch.fulfillRequest and (very) long body

[Fabien Picarougne]

Hi everyone,

I want to send via CDP a very long body to a request (for example a video file for a video html tag). Is it possible to send such a very long body message in Fetch.fulfillRequest? or can I transmit frames as stream (but I don't see any IO.write method)?

Kind regards

Fabien

[Andrey Kosyakov]

Hi Fabien,

On Wed, May 3, 2023 at 12:07 AM Fabien Picarougne <fabien.p...@gmail.com> wrote:

I want to send via CDP a very long body to a request (for example a video file for a video html tag). Is it possible to send such a very long body message in Fetch.fulfillRequest? or can I transmit frames as stream (but I don't see any IO.write method)?

Unfortunately, there's no streaming support for Fetch network interception at the moment, so all response overrides are inherently limited by whatever fits in a single CDP message.

Best regards,

Andrey.

[Fabien Picarougne]

Thanks for your answer.

Just a small additional question: what is the size limit of a single CDP message?

Kind regards

Fabien

[Milan Hauth]

all response overrides are inherently limited by whatever fits in a single CDP message.

this seems to be limited only by RAM

i just tried to insert a 1GB response, and it only failed because of a CDP timeout

(and its terribly slow, probably because of the JSON overhead)

its surprising that such a basic feature is missing

there is Fetch.takeResponseBodyAsStream and IO.read

but not Fetch.giveResponseBodyAsStream and IO.write

there is Network.takeResponseBodyForInterceptionAsStream and IO.read

but not Network.giveResponseBodyForInterceptionAsStream and IO.write

[Ilya Kreymer]

I was also looking for this functionality for a while, and finally opened an issue requesting streaming write support last month: https://issues.chromium.org/issues/332570739

I know its low priority, but maybe will get implemented some day if enough folks are interested in it?

Ilya