Re: [Libevent-users] Handling concurent evhttp connections with evhttp_send_reply_chunk.

[Patrick C <pcloches@xxxxxxxxx>]

Agreed. The most optimal way of doing this would be to use your operating system's sendfile() routine, where available, in the evhttp_write_cb routine.

-Patrick

2009/11/16 Tero Marttila <terom@xxxxxxxx>

Krzysztof Adamski wrote:

Hi,
i would like to build simple HTTPD server using libevent2. It is going
to send some quite big files but i would like it to handle couple
concurrent connections. The files can be sent in chunks so I'm using
evhttp_send_reply_chunk for this. The problem is, how can I send big
files while still being able to handle new connections?

One option is to add the functionality to evhttp.

I don't have any concrete patches to post, but when I tried this a (long) while ago, it was fairly straightforward, just building on top of the existing bufferevent watermark functionality.

More specifically, it amounted to having evhttp_write_buffer apply a suitable bufferevent_setwatermark (EV_WRITE lowmark) when called from within evhttp_send_reply_chunk, setting up evcon->cb to invoke the user's "send more data" callback from evhttp_write_cb. This worked, to the extent that I tested it.

 -- Tero Marttila

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