On Monday, 05 December 2011 11:19:51 Denis Spichkin wrote:
> Trying to write a program for mod_perl2 that gradually display its
> output such as output from "ping" (output during PIPE execution).
>
> For example
> http://www.websitepulse.com/help/testreq.php?host=www.ya.ru&location=9&type=
> 1&singletestpage=ping-test&pass=&ttref=http%3A%2F%2Fwww.websitepulse.com%2F&
> __=1323068838832
>
> At the moment I was able display all output at once. That completely
> unacceptable for this type of program
>
> my $ping = '/bin/ping';
> my $count = '-c 10';
> open (PIPE, "$ping $count $param |");
> if (!<PIPE>) {
> $r->print("Error: can't open the pipe $!");
> return OK;
> };
>
> while (<PIPE>) {
> $r->write($_); # tried $r->print and $r->puts......with
> the same result
> $r->write('<br />');
> };
>
> close (PIPE);
>
>
> Please if anyone know how possible gradually display output in
> mod_perl2 help me........
I believe your program works as expected. The rest is a browser issue. Try
this one on the command line:
perl -MIO::Socket::INET -le '
my $s=IO::Socket::INET->new($ARGV[0].":80");
$s->print("GET $ARGV[1] HTTP/1.0\r\nHost: $ARGV[0]\r\n\r\n");
while(<$s>) {
print time."\t".$_;
}' www.websitepulse.com
'/help/testreq.php?host=www.ya.ru&location=9&type=1&singletestpage=ping-
test&pass=&ttref=http%3A%2F%2Fwww.websitepulse.com%2F&__=1323068838832'
Here I get the output:
1323076533 HTTP/1.1 200 OK
...
1323076533 </b></td></tr><tr bgcolor=#F5F5F5><td nowrap>64 bytes from
www.yandex.ru (77.88.21.3): icmp_seq=0 ttl=56 time=158 ms
1323076534 </td></tr><tr bgcolor=#F5F5F5><td nowrap>64 bytes from
www.yandex.ru (77.88.21.3): icmp_seq=1 ttl=56 time=158 ms
1323076535 </td></tr><tr bgcolor=#F5F5F5><td nowrap>64 bytes from
www.yandex.ru (77.88.21.3): icmp_seq=2 ttl=56 time=158 ms
1323076536 </td></tr><tr bgcolor=#F5F5F5><td nowrap>64 bytes from
www.yandex.ru (77.88.21.3): icmp_seq=3 ttl=56 time=158 ms
1323076537 </td></tr><tr bgcolor=#F5F5F5><td nowrap>64 bytes from
www.yandex.ru (77.88.21.3): icmp_seq=4 ttl=56 time=158 ms
1323076537 </td></tr><tr bgcolor=#F5F5F5><td nowrap>
You see the first few lines come in at the same time. Then between each of the
ping output lines is an interval of 1 sec.
The reason why you don't see it immediately in the browser window is the
browser rendering.
Have a look also at:
http://foertsch.name/ModPerl-Tricks/ServerPush.shtml
http://foertsch.name/ModPerl-Tricks/req-hand-over.shtml
Torsten Förtsch
--
Need professional modperl support? Hire me! (http://foertsch.name)
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