--- loncom/homework/grades.pm 2008/02/06 00:39:11 1.509 +++ loncom/homework/grades.pm 2008/03/04 11:23:12 1.513 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # The LON-CAPA Grading handler # -# $Id: grades.pm,v 1.509 2008/02/06 00:39:11 raeburn Exp $ +# $Id: grades.pm,v 1.513 2008/03/04 11:23:12 foxr Exp $ # # Copyright Michigan State University Board of Trustees # @@ -47,8 +47,82 @@ use LONCAPA; use POSIX qw(floor); + my %perm=(); +# These variables are used to recover from ssi errors + +my $ssi_retries = 5; +my $ssi_error; +my $ssi_error_resource; +my $ssi_error_message; + + +# Do an ssi with retries: +# While I'd love to factor out this with the vesrion in lonprintout, +# that would either require a data coupling between modules, which I refuse to perpetuate +# (there's quite enough of that already), or would require the invention of another infrastructure +# I'm not quite ready to invent (e.g. an ssi_with_retry object). +# +# At least the logic that drives this has been pulled out into loncommon. + + +# +# ssi_with_retries - Does the server side include of a resource. +# if the ssi call returns an error we'll retry it up to +# the number of times requested by the caller. +# If we still have a proble, no text is appended to the +# output and we set some global variables. +# to indicate to the caller an SSI error occured. +# All of this is supposed to deal with the issues described +# in LonCAPA BZ 5631 see: +# http://bugs.lon-capa.org/show_bug.cgi?id=5631 +# by informing the user that this happened. +# +# Parameters: +# resource - The resource to include. This is passed directly, without +# interpretation to lonnet::ssi. +# form - The form hash parameters that guide the interpretation of the resource +# +# retries - Number of retries allowed before giving up completely. +# Returns: +# On success, returns the rendered resource identified by the resource parameter. +# Side Effects: +# The following global variables can be set: +# ssi_error - If an unrecoverable error occured this becomes true. +# It is up to the caller to initialize this to false +# if desired. +# ssi_last_error_resource - If an unrecoverable error occured, this is the value +# of the resource that could not be rendered by the ssi +# call. +# ssi_last_error - The error string fetched from the ssi response +# in the event of an error. +# +sub ssi_with_retries { + my ($resource, $retries, %form) = @_; + my ($content, $response) = &Apache::loncommon::ssi_with_retries($resource, $retries, %form); + if ($response->is_error) { + $ssi_error = 1; + $ssi_error_resource = $resource; + $ssi_error_message = $response->code . " " . $response->message; + } + + return $content; + +} +# +# Prodcuces an ssi retry failure error message to the user: +# + +sub ssi_print_error { + my ($r) = @_; + $r->print('

Unrecoverable network error

'); + $r->print('

Unable to perform a resource fetch from a server:
'); + $r->print("Resource: $ssi_error_resource
"); + $r->print("Error: $ssi_error_message
Try again later."); + $r->print('If errors persist, contact LonCAPA support for assistance

'); +} + # # --- Retrieve the parts from the metadata file.--- sub getpartlist { @@ -201,7 +275,7 @@ sub reset_caches { my (undef,undef,$url)=&Apache::lonnet::decode_symb($symb); $url=&Apache::lonnet::clutter($url); - my $subresult=&Apache::lonnet::ssi($url, + my $subresult=&ssi_with_retries($url, $ssi_retries, ('grade_target' => 'analyze'), ('grade_domain' => $udom), ('grade_symb' => $symb), @@ -4881,6 +4955,8 @@ sub scantron_selectphase { my $CODE_unique=&scantron_CODEunique(); my $result; + $ssi_error = 0; + # Chunk of form to prompt for a file to grade and how: $result.= ' @@ -5458,7 +5534,10 @@ sub scantron_validator_lettnum { my $occurrences = 0; if (($responsetype_per_response{$questnum-1} eq 'essayresponse') || ($responsetype_per_response{$questnum-1} eq 'formularesponse') || - ($responsetype_per_response{$questnum-1} eq 'stringresponse')) { + ($responsetype_per_response{$questnum-1} eq 'stringresponse') || + ($responsetype_per_response{$questnum-1} eq 'imageresponse') || + ($responsetype_per_response{$questnum-1} eq 'reactionresponse') || + ($responsetype_per_response{$questnum-1} eq 'organicresponse')) { my @singlelines = split('',$currquest); foreach my $entry (@singlelines) { $occurrences = &occurence_count($entry,$matchon); @@ -5557,7 +5636,10 @@ sub scantron_validator_positional { # if (($responsetype_per_response{$questnum-1} eq 'essayresponse') || ($responsetype_per_response{$questnum-1} eq 'formularesponse') || - ($responsetype_per_response{$questnum-1} eq 'stringresponse')) { + ($responsetype_per_response{$questnum-1} eq 'stringresponse') || + ($responsetype_per_response{$questnum-1} eq 'imageresponse') || + ($responsetype_per_response{$questnum-1} eq 'reactionresponse') || + ($responsetype_per_response{$questnum-1} eq 'organicresponse')) { my $doubleerror = 0; while (($currquest >= $$scantron_config{'Qlength'}) && (!$doubleerror)) { @@ -6031,8 +6113,7 @@ sub scantron_validate_file { } if (!$stop) { my $warning=&scantron_warning_screen('Start Grading'); - $r->print(' -'.&mt('Validation process complete.').'
+ $r->print(&mt('Validation process complete.').'
'.$warning.' @@ -6798,8 +6879,9 @@ for multi and missing bubble cases). in exam mode. This hash contains a comma-separated list of the lines per sub-question. - %responsetype_per_response - essayresponse, forumalaresponse, and - stringresponse type problem parts can have + %responsetype_per_response - essayresponse, formularesponse, + stringresponse, imageresponse, reactionresponse, + and organicresponse type problem parts can have multiple lines per response if the weight assigned exceeds 10. In this case, only one bubble per line is permitted, but more @@ -6833,7 +6915,10 @@ sub prompt_for_corrections { $r->print(&mt('The group of bubble lines below responds to a single question.').'
'); if (($responsetype_per_response{$question-1} eq 'essayresponse') || ($responsetype_per_response{$question-1} eq 'formularesponse') || - ($responsetype_per_response{$question-1} eq 'stringresponse')) { + ($responsetype_per_response{$question-1} eq 'stringresponse') || + ($responsetype_per_response{$question-1} eq 'imageresponse') || + ($responsetype_per_response{$question-1} eq 'reactionresponse') || + ($responsetype_per_response{$question-1} eq 'organicresponse')) { $r->print(&mt("Although this particular question type requires handgrading, the instructions for this question in the exam directed students to leave [quant,_1,line] blank on their scantron sheets.",$lines).'

'.&mt('A non-zero score can be assigned to the student during scantron grading by selecting a bubble in at least one line.').'
'.&mt('The score for this question will be a sum of the numeric values for the selected bubbles from each line, where A=1 point, B=2 points etc.').'
'.&mt("To assign a score of zero for this question, mark all lines as 'No bubble'.").'

'); } else { $r->print(&mt("Select at most one bubble in a single line and select 'No Bubble' in all the other lines. ")."
"); @@ -7146,8 +7231,9 @@ sub scantron_get_maxbubble { my $response_number = 0; my $bubble_line = 0; foreach my $resource (@resources) { - # Need to retrieve part IDs and response IDs because essayresponse - # items are not included in $analysis{'parts'} from lonnet::ssi. + # Need to retrieve part IDs and response IDs because essayresponse, + # reactionresponse and organicresponse items are not included in + # $analysis{'parts'} from lonnet::ssi. my %possible_part_ids; if (ref($resource->parts()) eq 'ARRAY') { foreach my $part (@{$resource->parts()}) { @@ -7157,7 +7243,7 @@ sub scantron_get_maxbubble { } } } - my $result=&Apache::lonnet::ssi($resource->src(), + my $result=&ssi_with_retries($resource->src(), $ssi_retries, ('symb' => $resource->symb()), ('grade_target' => 'analyze'), ('grade_courseid' => $cid), @@ -7175,7 +7261,9 @@ sub scantron_get_maxbubble { } # Add part_ids for any essayresponse items. foreach my $part_id (keys(%possible_part_ids)) { - if ($analysis{$part_id.'.type'} eq 'essayresponse') { + if (($analysis{$part_id.'.type'} eq 'essayresponse') || + ($analysis{$part_id.'.type'} eq 'reactionresponse') || + ($analysis{$part_id.'.type'} eq 'organicresponse')) { if (!grep(/^\Q$part_id\E$/,@parts)) { push (@parts,$part_id); } @@ -7329,9 +7417,12 @@ sub scantron_validate_missingbubbles { sub scantron_process_students { my ($r) = @_; + my (undef,undef,$sequence)=&Apache::lonnet::decode_symb($env{'form.selectpage'}); my ($symb)=&get_symb($r); - if (!$symb) {return '';} + if (!$symb) { + return ''; + } my $default_form_data=&defaultFormData($symb); my %scantron_config=&get_scantron_config($env{'form.scantron_format'}); @@ -7363,6 +7454,17 @@ SCANTRONFORM my ($uname,$udom,$started); &scantron_get_maxbubble(); # Need the bubble lines array to parse. + + + # If an ssi failed in scantron_get_maxbubble, put an error message out to + # the user and return. + + if ($ssi_error) { + $r->print(""); + &ssi_print_error($r); + $r->print(&show_grading_menu_form($symb)); + return ''; # Dunno why the other returns return '' rather than just returning. + } while ($i<$scanlines->{'count'}) { ($uname,$udom)=('',''); @@ -7411,10 +7513,16 @@ SCANTRONFORM $form{'CODE'}=$scan_record->{'scantron.CODE'}; } else { $form{'CODE'}=''; + } + my $result=&ssi_with_retries($resource->src(), $ssi_retries, %form); + if ($ssi_error) { + $ssi_error = 0; # So end of handler error message does not trigger. + $r->print(""); + &ssi_print_error($r); + $r->print(&show_grading_menu_form($symb)); + return ''; # Why return ''? Beats me. } - my $result=&Apache::lonnet::ssi($resource->src(),%form); - if ($result ne '') { - } + if (&Apache::loncommon::connection_aborted($r)) { last; } } $completedstudents{$uname}={'line'=>$line}; @@ -7716,14 +7824,12 @@ sub grading_menu { $menudata->{'url'}.'" >'. $menudata->{'name'}."\n"; } else { - $Str .='

{'jscript'}. ' onClick="javascript:checkChoice(document.forms.gradingMenu,\'5\',\'verify\')" '. - ' />

'; - $Str .= (' 'x8). - &mt(' receipt: [_1]', - &Apache::lonnet::recprefix($env{'request.course.id'}). - '-'); + ' /> '. + &Apache::lonnet::recprefix($env{'request.course.id'}). + '-'; } $Str .= ' '.(' 'x8).$menudata->{'short_description'}. "\n"; @@ -8456,7 +8562,7 @@ sub handler { &Apache::lonnet::logthis("grades got multiple commands ".join(':',@commands)); } - + $ssi_error = 0; $request->print(&Apache::loncommon::start_page('Grading')); if ($symb eq '' && $command eq '') { if ($env{'user.adv'}) { @@ -8469,7 +8575,7 @@ sub handler { if ($tsymb) { my ($map,$id,$url)=&Apache::lonnet::decode_symb($tsymb); if (&Apache::lonnet::allowed('mgr',$tcrsid)) { - $request->print(&Apache::lonnet::ssi_body('/res/'.$url, + $request->print(&ssi_with_retries('/res/'.$url, $ssi_retries, ('grade_username' => $tuname, 'grade_domain' => $tudom, 'grade_courseid' => $tcrsid, @@ -8556,6 +8662,9 @@ sub handler { $request->print("Access Denied ($command)"); } } + if ($ssi_error) { + &ssi_print_error($request); + } $request->print(&Apache::loncommon::end_page()); &reset_caches(); return '';