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.\"
.IX Title "CPANPLUS::Internals::Fetch 3perl"
.TH CPANPLUS::Internals::Fetch 3perl "2016-02-27" "perl v5.14.2" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
CPANPLUS::Internals::Fetch \- internals for fetching files
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 6
\&    my $output = $cb\->_fetch(
\&                        module      => $modobj,
\&                        fetchdir    => \*(Aq/path/to/save/to\*(Aq,
\&                        verbose     => BOOL,
\&                        force       => BOOL,
\&                    );
\&
\&    $cb\->_add_fail_host( host => \*(Aqfoo.com\*(Aq );
\&    $cb\->_host_ok(       host => \*(Aqfoo.com\*(Aq );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
CPANPLUS::Internals::Fetch fetches files from either ftp, http, file
or rsync mirrors.
.PP
This is the rough flow:
.PP
.Vb 2
\&    $cb\->_fetch
\&        Delegate to File::Fetch;
.Ve
.SH "METHODS"
.IX Header "METHODS"
.ie n .SH "$path = _fetch( module => $modobj, [fetchdir => '/path/to/save/to', fetch_from => 'scheme://path/to/fetch/from', verbose => BOOL, force => BOOL, prefer_bin => BOOL, ttl => $seconds] )"
.el .SH "\f(CW$path\fP = _fetch( module => \f(CW$modobj\fP, [fetchdir => '/path/to/save/to', fetch_from => 'scheme://path/to/fetch/from', verbose => BOOL, force => BOOL, prefer_bin => BOOL, ttl => \f(CW$seconds\fP] )"
.IX Header "$path = _fetch( module => $modobj, [fetchdir => '/path/to/save/to', fetch_from => 'scheme://path/to/fetch/from', verbose => BOOL, force => BOOL, prefer_bin => BOOL, ttl => $seconds] )"
\&\f(CW\*(C`_fetch\*(C'\fR will fetch files based on the information in a module
object. You always need a module object. If you want a fake module
object for a one-off fetch, look at \f(CW\*(C`CPANPLUS::Module::Fake\*(C'\fR.
.PP
\&\f(CW\*(C`fetchdir\*(C'\fR is the place to save the file to. Usually this
information comes from your configuration, but you can override it
expressly if needed.
.PP
\&\f(CW\*(C`fetch_from\*(C'\fR lets you specify an \s-1URI\s0 to get this file from. If you
do not specify one, your list of configured hosts will be probed to
download the file from.
.PP
\&\f(CW\*(C`force\*(C'\fR forces a new download, even if the file already exists.
.PP
\&\f(CW\*(C`verbose\*(C'\fR simply indicates whether or not to print extra messages.
.PP
\&\f(CW\*(C`prefer_bin\*(C'\fR indicates whether you prefer the use of commandline
programs over perl modules. Defaults to your corresponding config
setting.
.PP
\&\f(CW\*(C`ttl\*(C'\fR (in seconds) indicates how long a cached copy is valid for. If
the fetch time of the local copy is within the ttl, the cached copy is
returned. Otherwise, the file is refetched.
.PP
\&\f(CW\*(C`_fetch\*(C'\fR figures out, based on the host list, what scheme to use and
from there, delegates to \f(CW\*(C`File::Fetch\*(C'\fR do the actual fetching.
.PP
Returns the path of the output file on success, false on failure.
.PP
Note that you can set a \f(CW\*(C`blacklist\*(C'\fR on certain methods in the config.
Simply add the identifying name of the method (ie, \f(CW\*(C`lwp\*(C'\fR) to:
    \f(CW$conf\fR\->_set_fetch( blacklist => ['lwp'] );
.PP
And the \f(CW\*(C`LWP\*(C'\fR function will be skipped by \f(CW\*(C`File::Fetch\*(C'\fR.
.ie n .SS "_add_fail_host( host => $host_hashref )"
.el .SS "_add_fail_host( host => \f(CW$host_hashref\fP )"
.IX Subsection "_add_fail_host( host => $host_hashref )"
Mark a particular host as bad. This makes \f(CW\*(C`CPANPLUS::Internals::Fetch\*(C'\fR
skip it in fetches until this cache is flushed.
.ie n .SS "_host_ok( host => $host_hashref )"
.el .SS "_host_ok( host => \f(CW$host_hashref\fP )"
.IX Subsection "_host_ok( host => $host_hashref )"
Query the cache to see if this host is ok, or if it has been flagged
as bad.
.PP
Returns true if the host is ok, false otherwise.