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Regarding HTTP chunked Body being stored in temp_file

September 16, 2022 03:32AM

In our module code, we are processing the HTTP request body when it is not stored in r->request_body->temp_file.

When I send a 9381 bytes body, NGINX doesn't store the body in temp_file but in the internal buffers. Hence we are able to process the body.

However, when I enable chunked encoding, the same 9381 bytes body, gets stored in the r->request_body->temp_file.

To avoid getting stored in temp_file, I have to increase the client_body_buffer_size to a larger value than the default. In that case, chunked encoded http body is NOT stored in temp_file and we are able to process it.

Is there any reason why the behaviour of client_body_buffer_size is different in case of regular HTTP traffic v/s chunked encoded HTTP traffic? Why do we need a larger buffer size to ensure chunked encoded traffic doesn't get stored in temp_file?

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Subject Author Posted

Regarding HTTP chunked Body being stored in temp_file

dtandon September 16, 2022 03:32AM

Re: Regarding HTTP chunked Body being stored in temp_file

Maxim Dounin September 17, 2022 01:08PM

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