package Apache::Request;
use strict;
use mod_perl 1.17_01;
use Apache::Table ();
{
no strict;
$VERSION = '1.1';
@ISA = qw(Apache);
__PACKAGE__->mod_perl::boot($VERSION);
}
#just prototype methods here, moving to xs later
sub instance {
my $class = shift;
my $r = shift;
if (my $apreq = $r->pnotes('apreq')) {
return $apreq;
}
my $new_req = $class->new($r, @_);
$r->pnotes('apreq', $new_req);
return $new_req;
}
1;
__END__
=head1 NAME
Apache::Request - Methods for dealing with client request data
=head1 SYNOPSIS
use Apache::Request ();
my $apr = Apache::Request->new($r);
=head1 DESCRIPTION
I<Apache::Request> is a subclass of the I<Apache> class, which adds methods
for parsing B<GET> requests and B<POST> requests where I<Content-type>
is one of I<application/x-www-form-urlencoded> or
I<multipart/form-data>. See the libapreq(3) manpage for more details.
=head1 Apache::Request METHODS
The interface is designed to mimic CGI.pm 's routines for parsing
query parameters. The main differences are
=over 4
=item * C<Apache::Request::new> takes an Apache object as (second) argument.
=item * The query parameters are stored as Apache::Table objects,
and are therefore parsed using case-insensitive keys.
=item * C<-attr =E<gt> $val> -type arguments are not supported.
=item * The query string is always parsed, even for POST requests.
=back
=over 4
=head2 new
Create a new I<Apache::Request> object with an I<Apache> request_rec object:
my $apr = Apache::Request->new($r);
All methods from the I<Apache> class are inherited.
The following attributes are optional:
=over 4
=item POST_MAX
Limit the size of POST data (in bytes). I<Apache::Request::parse> will
return an error code if the size is exceeded:
my $apr = Apache::Request->new($r, POST_MAX => 1024);
my $status = $apr->parse;
if ($status) {
my $errmsg = $apr->notes("error-notes");
...
return $status;
}
=item DISABLE_UPLOADS
Disable file uploads. I<Apache::Request::parse> will return an
error code if a file upload is attempted:
my $apr = Apache::Request->new($r, DISABLE_UPLOADS => 1);
my $status = $apr->parse;
if ($status) {
my $errmsg = $apr->notes("error-notes");
...
return $status;
}
=item TEMP_DIR
Sets the directory where upload files are spooled. On a *nix-like
that supports link(2), the TEMP_DIR should be located on the same
file system as the final destination file:
my $apr = Apache::Request->new($r, TEMP_DIR => "/home/httpd/tmp");
my $upload = $apr->upload('file');
$upload->link("/home/user/myfile") || warn "link failed: $!";
=item HOOK_DATA
Extra configuration info passed to an upload hook.
See the description for the next item, I<UPLOAD_HOOK>.
=item UPLOAD_HOOK
Sets up a callback to run whenever file upload data is read. This
can be used to provide an upload progress meter during file uploads.
Apache will automatically continue writing the original data to
$upload->fh after the hook exits.
my $transparent_hook = sub {
my ($upload, $buf, $len, $hook_data) = @_;
warn "$hook_data: got $len bytes for " . $upload->name;
};
my $apr = Apache::Request->new($r,
HOOK_DATA => "Note",
UPLOAD_HOOK => $transparent_hook,
);
$apr->parse;
=back
=head2 instance
The instance() class method allows Apache::Request to be a singleton.
This means that whenever you call Apache::Request->instance() within a
single request you always get the same Apache::Request object back.
This solves the problem with creating the Apache::Request object twice
within the same request - the symptoms being that the second
Apache::Request object will not contain the form parameters because
they have already been read and parsed.
my $apr = Apache::Request->instance($r, DISABLE_UPLOADS => 1);
Note that C<instance()> call will take the same parameters as the above
call to C<new()>, however the parameters will only have an effect the
first time C<instance()> is called within a single request. Extra
parameters will be ignored on subsequent calls to C<instance()> within
the same request.
Subrequests receive a new Apache::Request object when they call
instance() - the parent request's Apache::Request object is not copied
into the subrequest.
Also note that it is unwise to use the C<parse()> method when using
C<instance()> because you may end up trying to call it twice, and
detecting errors where there are none.
=head2 parse
The I<parse> method does the actual work of parsing the request.
It is called for you by the accessor methods, so it is not required but
can be useful to provide a more user-friendly message should an error
occur:
my $r = shift;
my $apr = Apache::Request->new($r);
my $status = $apr->parse;
unless ($status == OK) {
$apr->custom_response($status, $apr->notes("error-notes"));
return $status;
}
=head2 param
Get or set request parameters (using case-insensitive keys) by
mimicing the OO interface of C<CGI::param>. Unlike the CGI.pm version,
Apache::Request's param method is I<very> fast- it's now quicker than even
mod_perl's native Apache->args method. However, CGI.pm's
C<-attr =E<gt> $val> type arguments are not supported.
# similar to CGI.pm
my $value = $apr->param('foo');
my @values = $apr->param('foo');
my @params = $apr->param;
# the following differ slightly from CGI.pm
# assigns multiple values to 'foo'
$apr->param('foo' => [qw(one two three)]);
# returns ref to underlying apache table object
my $table = $apr->param; # identical to $apr->parms - see below
=head2 parms
Get or set the underlying apache parameter table of the I<Apache::Request>
object. When invoked without arguments, C<parms> returns a reference
to an I<Apache::Table> object that is tied to the Apache::Request
object's parameter table. If called with an Apache::Table reference
as as argument, the Apache::Request object's parameter table is
replaced by the argument's table.
# $apache_table references an Apache::Table object
$apr->parms($apache_table); # sets $apr's parameter table
# returns ref to Apache::Table object provided by $apache_table
my $table = $apr->parms;
=head2 upload
Returns a single I<Apache::Upload> object in a scalar context or
all I<Apache::Upload> objects in a list context:
my $upload = $apr->upload;
my $fh = $upload->fh;
my $lines = 0;
while(<$fh>) {
++$lines;
...
}
An optional name parameter can be passed to return the I<Apache::Upload>
object associated with the given name:
my $upload = $apr->upload($name);
=back
=head1 Apache::Upload METHODS
=over 4
=head2 name
The name of the filefield parameter:
my $name = $upload->name;
=head2 filename
The filename of the uploaded file:
my $filename = $upload->filename;
=head2 fh
The filehandle pointing to the uploaded file:
my $fh = $upload->fh;
while (<$fh>) {
...
}
=head2 size
The size of the file in bytes:
my $size = $upload->size;
=head2 info
The additional header information for the uploaded file.
Returns a hash reference tied to the I<Apache::Table> class.
An optional I<key> argument can be passed to return the value of
a given header rather than a hash reference. Examples:
my $info = $upload->info;
while (my($key, $val) = each %$info) {
...
}
my $val = $upload->info("Content-type");
=head2 type
Returns the I<Content-Type> for the given I<Apache::Upload> object:
my $type = $upload->type;
#same as
my $type = $upload->info("Content-Type");
=head2 next
Upload objects are implemented as a linked list by libapreq; the
I<next> method provides an alternative to using the I<Apache::Request>
I<upload> method in a list context:
for (my $upload = $apr->upload; $upload; $upload = $upload->next) {
...
}
#functionally the same as:
for my $upload ($apr->upload) {
...
}
=head2 tempname
Provides the name of the spool file. This method is reserved for
debugging purposes, and is possibly subject to change in a future
version of Apache::Request.
=head2 link
To avoid recopying the spool file on a *nix-like system,
I<link> will create a hard link to it:
my $upload = $apr->upload('file');
$upload->link("/path/to/newfile") or
die sprintf "link from '%s' failed: $!", $upload->tempname;
Typically the new name must lie on the same file system as the
spool file. Check your system's link(2) manpage for details.
=back
=head1 SEE ALSO
libapreq(3), Apache::Table(3)
=head1 CREDITS
This interface is based on the original pure Perl version by Lincoln Stein.
=head1 AUTHOR
Doug MacEachern, updated for v1.0 by Joe Schaefer