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Flickr::Upload.3pm

NAME

Flickr::Upload - Upload images to "flickr.com"

SYNOPSIS

         use Flickr::Upload;
 
         my $ua = Flickr::Upload->new(
                 {
                         'key' => '90909354',
                         'secret' => '37465825'
                 });
         $ua->upload(
                 'photo' => '/tmp/image.jpg',
                 'auth_token' => $auth_token,
                 'tags' => 'me myself eye',
                 'is_public' => 1,
                 'is_friend' => 1,
                 'is_family' => 1
         ) or die "Failed to upload /tmp/image.jpg";
 
 

DESCRIPTION

Upload an image to flickr.com.

METHODS

new

         my $ua = Flickr::Upload->new(
                 {
                         'key' => '90909354',
                         'secret' => '37465825'
                 });
 
 

Instatiates a Flickr::Upload instance. The "key" argument is your API key and the "secret" is the API secret associated with it. To get an API key and secret, go to <http://www.flickr.com/services/api/key.gne>.

The resulting Flickr::Upload instance is a subclass of Flickr::API and can be used for any other Flickr API calls. As such, Flickr::Upload is also a subclass of LWP::UserAgent.

upload

         my $photoid = $ua->upload(
                 'photo' => '/tmp/image.jpg',
                 'auth_token' => $auth_token,
                 'tags' => 'me myself eye',
                 'is_public' => 1,
                 'is_friend' => 1,
                 'is_family' => 1
                 'async' => 0,
         );
 
 

Taking a Flickr::Upload instance $ua as an argument, this is basically a direct interface to the Flickr Photo Upload API. Required parameters are "photo" and "auth_token". Note that the "auth_token" must have been issued against the API key and secret used to instantiate the uploader.

Returns the resulting identifier of the uploaded photo on success, "undef" on failure. According to the API documentation, after an upload the user should be directed to the page <http://www.flickr.com/tools/uploader_edit.gne?ids=$photoid>.

If the "async" option is non-zero, the photo will be uploaded asynchronously and a successful upload returns a ticket identifier. See <http://flickr.com/services/api/upload.async.html>. The caller can then periodically poll for a photo id using the "check_upload" method. Note that photo and ticket identifiers aren't necessarily numeric.

check_upload

         my %status2txt = (0 => 'not complete', 1 => 'completed', 2 => 'failed');
         my @rc = $ua->check_upload( @ticketids );
         for( @rc ) {
                 print "Ticket $_->{id} has $status2txt{$_->{complete}}\n";
                 print "\tPhoto id is $_->{photoid}\n" if exists $_->{photoid};
         }
 
 

This function will check the status of one or more asynchronous uploads. A list of ticket identifiers are provided (@ticketids) and each is checked. This is basically just a wrapper around the Flickr API "flickr.photos.upload.checkTickets" method.

On success, a list of hash references is returned. Each hash contains a "id" (the ticket id), "complete" and, if completed, "photoid" members. "invalid" may also be returned. Status codes (for "complete") are as documented at <http://flickr.com/services/api/upload.async.html> and, actually, the returned fields are identical to those listed in the "ticket" tag of the response. The returned list isn't guaranteed to be in any particular order.

This function polls a web server, so avoid calling it too frequently.

make_upload_request

         my $req = $uploader->make_upload_request(
                 'auth_token' => '82374523',
                 'tags' => 'me myself eye',
                 'is_public' => 1,
                 'is_friend' => 1,
                 'is_family' => 1
         );
         $req->header( 'X-Greetz' => 'hi cal' );
         my $resp = $ua->request( $req );
 
 

Creates an HTTP::Request object loaded with all the flick upload parameters. This will also sign the request, which means you won't be able to mess any further with the upload request parameters.

Takes all the same parameters as upload, except that the photo argument isn't required. This in intended so that the caller can include it by messing directly with the HTTP content (via $DYNAMIC_FILE_UPLOAD or the HTTP::Message class, among other things). See "t/" directory from the source distribution for examples.

Returns a standard HTTP::Response POST object. The caller can manually do the upload or just call the upload_request function.

upload_request

         my $photoid = upload_request( $ua, $request );
 
 

Taking (at least) LWP::UserAgent and HTTP::Request objects as arguments, this executes the request and processes the result as a flickr upload. It's assumed that the request looks a lot like something created with make_upload_request. Note that the request must be signed according to the Flickr API authentication rules.

Returns the resulting identifier of the uploaded photo (or ticket for asynchronous uploads) on success, "undef" on failure. According to the API documentation, after an upload the user should be directed to the page <http://www.flickr.com/tools/uploader_edit.gne?ids=$photoid>.

file_length_in_encoded_chunk

         $HTTP::Request::Common::DYNAMIC_FILE_UPLOAD = 1;
         my $photo = 'image.jpeg';
         my $photo_size = (stat($photo))[7];
         my $req = $ua->make_upload_request( ... );
         my $gen = $req->content();
         die unless ref($gen) eq "CODE";
 
         my $state;
         my $size;
 
         $req->content(
                 sub {
                         my $chunk = &$gen();
 
                         $size += Flickr::Upload::file_length_in_encoded_chunk(\$chunk, \$state, $photo_size);
 
                         warn "$size bytes have now been uploaded";
 
                         return $chunk;
                 }
         );
 
         $rc = $ua->upload_request( $req );
 
 

This subroutine is tells you how much of a chunk in a series of variable size multipart HTTP chunks contains a single file being uploaded given a reference to the current chunk, a reference to a state variable that lives between calls, and the size of the file being uploaded.

It can be used used along with HTTP::Request::Common's $HTTP::Request::Common::DYNAMIC_FILE_UPLOAD facility to implement upload progress bars or other upload monitors, see flickr_upload for a practical example and t/progress_request.t for tests.

SEE ALSO

<http://flickr.com/services/api/>

Flickr::API

AUTHOR

Christophe Beauregard, cpb@cpan.org

COPYRIGHT AND LICENSE

This module is not an official Flickr.com (or Ludicorp, or Yahoo) service.

Copyright (C) 2004,2005 by Christophe Beauregard

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.3 or, at your option, any later version of Perl 5 you may have available.