use Moose;
use namespace::autoclean;
use Encode qw/ decode_utf8 /;
-use JSON qw/ decode_json encode_json from_json /;
+use JSON;
use LWP::UserAgent;
use Safe::Isa;
use TryCatch;
my $pdata = <POSTDATA>;
chomp $pdata;
close POSTDATA;
- $answer = from_json( $pdata );
+ try {
+ $answer = from_json( $pdata );
+ } catch {
+ return _json_error( $c, 400,
+ "Could not parse POST request '' $pdata '' as JSON: $@" );
+ }
} else {
$answer = from_json( $c->request->body );
}
- # Find a tradition with the defined Stemweb job ID.
- # TODO: Maybe get Stemweb to pass back the tradition ID...
- my $m = $c->model('Directory');
- my @traditions;
- $m->scan( sub{ push( @traditions, $_[0] )
- if $_[0]->$_isa('Text::Tradition')
- && $_[0]->has_stemweb_jobid
- && $_[0]->stemweb_jobid eq $answer->{job_id};
- } );
- if( @traditions == 1 ) {
- my $tradition = shift @traditions;
- if( $answer->{status} == 0 ) {
- try {
- $tradition->record_stemweb_result( $answer );
- $m->save( $tradition );
- } catch( Text::Tradition::Error $e ) {
- return _json_error( $c, 500, $e->message );
- } catch {
- return _json_error( $c, 500, $@ );
- }
- # If we got here, success!
- $c->stash->{'result'} = { 'status' => 'success' };
- $c->forward('View::JSON');
- } else {
- return _json_error( $c, 500,
- "Stemweb failure not handled: " . $answer->{result} );
- }
- } elsif( @traditions ) {
+ return _process_stemweb_result( $c, $answer );
+ } else {
+ return _json_error( $c, 403, 'Please use POST!' );
+ }
+}
+
+=head2 query
+
+ GET stemweb/query/<jobid>
+
+A backup method to query the stemweb server to check a particular job status.
+Returns a result as in /stemweb/result above, but status can also be -1 to
+indicate that the job is still running.
+
+=cut
+
+sub query :Local :Args(1) {
+ my( $self, $c, $jobid ) = @_;
+ my $ua = LWP::UserAgent->new();
+ my $resp = $ua->get( $STEMWEB_BASE_URL . "/jobstatus/$jobid" );
+ if( $resp->is_success ) {
+ # Process it
+ my $response = decode_utf8( $resp->content );
+ $c->log->debug( "Got a response from the server: $response" );
+ my $answer;
+ try {
+ $answer = from_json( $response );
+ } catch {
return _json_error( $c, 500,
- "Multiple traditions with Stemweb job ID " . $answer->{job_id} . "!" );
+ "Could not parse stemweb response '' $response '' as JSON: $@" );
+ }
+ return _process_stemweb_result( $c, $answer );
+ } elsif( $resp->code == 500 && $resp->header('Client-Warning')
+ && $resp->header('Client-Warning') eq 'Internal response' ) {
+ # The server was unavailable.
+ return _json_error( $c, 503, "The Stemweb server is currently unreachable." );
+ } else {
+ return _json_error( $c, 500, "Stemweb error: " . $resp->code . " / "
+ . $resp->content );
+ }
+}
+
+
+## Helper function for parsing Stemweb result data either by push or by pull
+sub _process_stemweb_result {
+ my( $c, $answer ) = @_;
+ # Find a tradition with the defined Stemweb job ID.
+ # TODO: Maybe get Stemweb to pass back the tradition ID...
+ my $m = $c->model('Directory');
+ my @traditions;
+ $m->scan( sub{ push( @traditions, $_[0] )
+ if $_[0]->$_isa('Text::Tradition')
+ && $_[0]->has_stemweb_jobid
+ && $_[0]->stemweb_jobid eq $answer->{job_id};
+ } );
+ if( @traditions == 1 ) {
+ my $tradition = shift @traditions;
+ if( $answer->{status} == 0 ) {
+ my $stemmata;
+ try {
+ $stemmata = $tradition->record_stemweb_result( $answer );
+ $m->save( $tradition );
+ } catch( Text::Tradition::Error $e ) {
+ return _json_error( $c, 500, $e->message );
+ } catch {
+ return _json_error( $c, 500, $@ );
+ }
+ # If we got here, success!
+ my @steminfo = map { {
+ name => $_->identifier,
+ directed => _json_bool( !$_->is_undirected ),
+ svg => $_->as_svg() } }
+ $stemmata;
+ $c->stash->{'result'} = {
+ 'status' => 'success',
+ 'stemmata' => \@steminfo };
+ } elsif( $answer->{status} < 1 ) {
+ $c->stash->{'result'} = { 'status' => 'running' };
+ } else {
+ return _json_error( $c, 500,
+ "Stemweb failure not handled: " . $answer->{result} );
+ }
+ } elsif( @traditions ) {
+ return _json_error( $c, 500,
+ "Multiple traditions with Stemweb job ID " . $answer->{job_id} . "!" );
+ } else {
+ # Possible that the tradition got updated in the meantime...
+ if( $answer->{status} == 0 ) {
+ $c->stash->{'result'} = { 'status' => 'notfound' };
} else {
return _json_error( $c, 400,
"No tradition found with Stemweb job ID " . $answer->{job_id} );
}
- } else {
- return _json_error( $c, 403, 'Please use POST!' );
}
+ $c->forward('View::JSON');
}
=head2 request
return_path => $return_uri->path,
return_host => $return_uri->host_port,
data => $t->collation->as_tsv,
- userid => $t->user->email,
+ userid => $c->user->get_object->email,
parameters => $reqparams };
# Call to the appropriate URL with the request parameters.
- $DB::single = 1;
my $ua = LWP::UserAgent->new();
+ $c->log->debug( 'Sending request to Stemweb: ' . to_json( $stemweb_request ) );
my $resp = $ua->post( $STEMWEB_BASE_URL . "/algorithms/process/$algorithm/",
'Content-Type' => 'application/json; charset=utf-8',
'Content' => encode_json( $stemweb_request ) );
if( $resp->is_success ) {
# Process it
$c->log->debug( 'Got a response from the server: '
- . decode_utf8( $stemweb_response ) );
+ . decode_utf8( $resp->content ) );
my $stemweb_response = decode_json( $resp->content );
try {
$t->set_stemweb_jobid( $stemweb_response->{jobid} );
return 0;
}
+sub _json_bool {
+ return $_[0] ? JSON::true : JSON::false;
+}
+
+
1;
projects / scpubgit/stemmaweb.git / blobdiff