apache2::subrequest.3

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

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.\" ========================================================================
.\"
.IX Title "mod_perl-2.0.2::docs::api::Apache2::SubRequest 3"
.TH mod_perl-2.0.2::docs::api::Apache2::SubRequest 3 "2005-10-21" "perl v5.10.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Apache2::SubRequest \- Perl API for Apache subrequests
.SH "Synopsis"
.IX Header "Synopsis"
.Vb 1
\&  use Apache2::SubRequest ();
\&  
\&  # run internal redirects at once
\&  $r\->internal_redirect($new_uri);
\&  $r\->internal_redirect_handler($new_uri);
\&  
\&  # create internal redirect objects
\&  $subr = $r\->lookup_uri("/foo");
\&  $subr = $r\->lookup_method_uri("GET", "/tmp/bar")
\&  $subr = $r\->lookup_file("/tmp/bar");
\&  # optionally manipulate the output through main request filters
\&  $subr = $r\->lookup_uri("/foo", $r\->output_filters);
\&  # now run them
\&  my $rc = $subr\->run;
.Ve
.SH "Description"
.IX Header "Description"
\&\f(CW\*(C`Apache2::SubRequest\*(C'\fR contains \s-1API\s0 for creating and running of Apache
sub-requests.
.PP
\&\f(CW\*(C`Apache2::SubRequest\*(C'\fR is a sub-class of \f(CW\*(C`Apache2::RequestRec
object\*(C'\fR.
.SH "API"
.IX Header "API"
\&\f(CW\*(C`Apache2::SubRequest\*(C'\fR provides the following functions and/or methods:
.ie n .Sh """DESTROY"""
.el .Sh "\f(CWDESTROY\fP"
.IX Subsection "DESTROY"
Free the memory associated with a sub request:
.PP
.Vb 1
\&  undef $subr; # but normally don\*(Aqt do that
.Ve
.ie n .IP "obj: $subr\fR ( \f(CW""Apache2::SubRequest object"" )" 4
.el .IP "obj: \f(CW$subr\fR ( \f(CWApache2::SubRequest object\fR )" 4
.IX Item "obj: $subr ( Apache2::SubRequest object )"
The sub request to finish
.IP "ret: no return value" 4
.IX Item "ret: no return value"
.PD 0
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.PP
\&\f(CW\*(C`DESTROY\*(C'\fR is called automatically when \f(CW$subr\fR goes out of scope.
.PP
If you want to free the memory earlier than that (for example if you
run several subrequests), you can \f(CW\*(C`undef\*(C'\fR the object as:
.PP
.Vb 1
\&  undef $subr;
.Ve
.PP
but never call \f(CW\*(C`DESTROY\*(C'\fR explicitly, since it'll result in
\&\f(CW\*(C`ap_destroy_sub_req\*(C'\fR being called more than once, resulting in
multiple brain injuries and certain hair loss.
.ie n .Sh """internal_redirect"""
.el .Sh "\f(CWinternal_redirect\fP"
.IX Subsection "internal_redirect"
Redirect the current request to some other uri internally
.PP
.Vb 1
\&  $r\->internal_redirect($new_uri);
.Ve
.ie n .IP "obj: $r\fR ( \f(CW""Apache2::RequestRec object"" )" 4
.el .IP "obj: \f(CW$r\fR ( \f(CWApache2::RequestRec object\fR )" 4
.IX Item "obj: $r ( Apache2::RequestRec object )"
The current request
.ie n .IP "arg1: $new_uri ( string )" 4
.el .IP "arg1: \f(CW$new_uri\fR ( string )" 4
.IX Item "arg1: $new_uri ( string )"
The \s-1URI\s0 to replace the current request with
.IP "ret: no return value" 4
.IX Item "ret: no return value"
.PD 0
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.PP
In case that you want some other request to be served as the top-level
request instead of what the client requested directly, call this
method from a handler, and then immediately return \f(CW\*(C`Apache2::Const::OK\*(C'\fR. The
client will be unaware the a different request was served to her
behind the scenes.
.ie n .Sh """internal_redirect_handler"""
.el .Sh "\f(CWinternal_redirect_handler\fP"
.IX Subsection "internal_redirect_handler"
Identical to \f(CW\*(C`internal_redirect\*(C'\fR, plus
automatically sets
\&\f(CW\*(C`$r\->content_type\*(C'\fR
is of the sub-request to be the same as of the main request, if
\&\f(CW\*(C`$r\->handler\*(C'\fR is
true.
.PP
.Vb 1
\&  $r\->internal_redirect_handler($new_uri);
.Ve
.ie n .IP "obj: $r\fR ( \f(CW""Apache2::RequestRec object"" )" 4
.el .IP "obj: \f(CW$r\fR ( \f(CWApache2::RequestRec object\fR )" 4
.IX Item "obj: $r ( Apache2::RequestRec object )"
The current request
.ie n .IP "arg1: $new_uri ( string )" 4
.el .IP "arg1: \f(CW$new_uri\fR ( string )" 4
.IX Item "arg1: $new_uri ( string )"
The \s-1URI\s0 to replace the current request with.
.IP "ret: no return value" 4
.IX Item "ret: no return value"
.PD 0
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.PP