I need to send to the client some data in chunks. The data is read from a Python file like object.

Right now I'm using a static ngx_chain_t variable, and for each cycle I read data from the "file" object in a buffer and do:

// allocate buf and b out.buf = b; out.next = NULL;

b->pos = buf; b->last = buf + n;

b->memory = 1; b->last_buf = 0;

rc = ngx_http_output_filter(r, &out); if (rc != NGX_OK) { goto error;

Then at the end of the cycle, then, I do a

return ngx_http_output_filter(r, NULL);

Unfortunately this does not works. What is the right method for sending data in chunks?