Question about ngx_handle_write_event

[Eran Kornblau]

> 
> Hello!
> 
> On Mon, Jul 01, 2019 at 07:23:11PM +0000, Eran Kornblau wrote:
> 
> > Something is unclear to me regarding the use of this function, the 
> > development guide says - "the functions ngx_handle_read_event(rev, 
> > flags) and ngx_handle_write_event(wev, lowat) must be called after handling an I/O socket notification or calling any I/O functions on that socket"
> > 
> > If my module finished sending all the data it had, and is now waiting 
> > for more data to arrive (on some other socket) does it still have to call ngx_handle_write_event?
> 
> Yes.  In particular, this is required with level-tiggered event methods, such as select and poll, to remove the socket from the event list if it was previously added there.
> 

Thank you, Maxim.

I'm looking at ngx_ssl_ocsp_write_handler, and I see that ngx_handle_write_event is called only when the request is fully sent -
it is not called in case of NGX_AGAIN / partial send. 
Is this a bug, or am I still missing something?

Also, isn't there a need to call ngx_send repeatedly in a loop, if it somehow returns n < size? 
(I see there is such a loop in ngx_linux_sendfile_chain for example)

Thanks again,

Eran


> --
> Maxim Dounin
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