Re: Infinite data stream from a non-HTTPD external process via HTTPD
On September 20, 2011 5:13 , Henrik Strand wrote: I would like to send an infinite data stream from a non-HTTPD external process via HTTPD to the client connection. Both HTTP and HTTPS must be supported. Dw.'s solution is a good one, especially if the external process you are talking about is not a child process spawned by httpd. In the special but very common case where the external process is a child process spawned by httpd, then the easiest solution is to have that process send its data to httpd (it's parent process) via STDOUT -- in other words, simply output the data as you normally would in any CGI script or other active content. To explicitly answer other questions: - Yes, httpd supports sending "infinite" amounts of data as long as output is sent at least as often as the value of the TimeOut directive (see https://httpd.apache.org/docs/2.2/mod/core.html#timeout ) and as long as the client (web browser, end user) does not close the connection by pressing the Stop button or by doing something else. - Anything that works via HTTP should also work via HTTPS, as far as I know, including Dw's solution. -- Mark Montague m...@catseye.org
Re: Infinite data stream from a non-HTTPD external process via HTTPD
On 20 Sep 2011, at 10:41, Henrik Strand wrote: > On Tue, 2011-09-20 at 11:32 +0200, Ben Noordhuis wrote: >> On Tue, Sep 20, 2011 at 11:13, Henrik Strand wrote: >>> I would like to send an infinite data stream from a non-HTTPD external >>> process via HTTPD to the client connection. Both HTTP and HTTPS must be >>> supported. >> >> What kind of external process are we talking here? Something that >> prints to stdout, listens on a UNIX/TCP socket, something else? > A process, running on the same system as httpd, that will generate a > video stream (i.e., a stream of images and audio). I found it very effective to use a socket pass (see Stevens[1] - or for the simplest case; see http://httpd.apache.org/docs/2.3/mod/mod_proxy_fdpass.html Or google on (WSADuplicateSocket, ioctl(I_SENDFD), sendmsg() with access rights, etc). Unfortunately they are not quite as portable as one would want to. Some old postings [2] may help, check the apr socket code. As you need to do a bit of work on the receiving side. Let me know if you get totally stuck - I may have some old cruft - though that was more to then pass on to NPath - a proprietary load balancing technique to move the TCP connection to another server altogether while having the return path bypassing the LB hardware itself. Dw. 1: http://www.amazon.com/dp/0131411551/ 2: http://archives.neohapsis.com/archives/postfix/2000-09/1476.html http://lists.canonical.org/pipermail/kragen-hacks/2002-January/000292.html
Re: Infinite data stream from a non-HTTPD external process via HTTPD
A process, running on the same system as httpd, that will generate a video stream (i.e., a stream of images and audio). On Tue, 2011-09-20 at 11:32 +0200, Ben Noordhuis wrote: > On Tue, Sep 20, 2011 at 11:13, Henrik Strand wrote: > > I would like to send an infinite data stream from a non-HTTPD external > > process via HTTPD to the client connection. Both HTTP and HTTPS must be > > supported. > > What kind of external process are we talking here? Something that > prints to stdout, listens on a UNIX/TCP socket, something else?
Re: Infinite data stream from a non-HTTPD external process via HTTPD
On Tue, Sep 20, 2011 at 11:13, Henrik Strand wrote: > I would like to send an infinite data stream from a non-HTTPD external > process via HTTPD to the client connection. Both HTTP and HTTPS must be > supported. What kind of external process are we talking here? Something that prints to stdout, listens on a UNIX/TCP socket, something else?
Infinite data stream from a non-HTTPD external process via HTTPD
Hi, I would like to send an infinite data stream from a non-HTTPD external process via HTTPD to the client connection. Both HTTP and HTTPS must be supported. Does HTTPD support this as of now? If not, how to implement such a module? Best Regards, Henrik
