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Quizzes are now called using quiz_mode instead of quiz
1 ################################################################################ 2 # WeBWorK mod_perl (c) 2000-2002 WeBWorK Project 3 # $Id$ 4 ################################################################################ 5 6 package WeBWorK; 7 8 =head1 NAME 9 10 WeBWorK - Dispatch requests to the appropriate ContentGenerator. 11 12 =cut 13 14 use strict; 15 use warnings; 16 use Apache::Constants qw(:common REDIRECT); 17 use Apache::Request; 18 use WeBWorK::Authen; 19 use WeBWorK::Authz; 20 use WeBWorK::ContentGenerator::Feedback; 21 use WeBWorK::ContentGenerator::Hardcopy; 22 use WeBWorK::ContentGenerator::Instructor::Index; 23 use WeBWorK::ContentGenerator::Instructor::PGProblemEditor; 24 use WeBWorK::ContentGenerator::Instructor::ProblemSetEditor; 25 use WeBWorK::ContentGenerator::Instructor::ProblemSetList; 26 use WeBWorK::ContentGenerator::Instructor::UserList; 27 use WeBWorK::ContentGenerator::Instructor::ProblemList; 28 use WeBWorK::ContentGenerator::Instructor::UserList; 29 use WeBWorK::ContentGenerator::Login; 30 use WeBWorK::ContentGenerator::Logout; 31 use WeBWorK::ContentGenerator::Options; 32 use WeBWorK::ContentGenerator::Problem; 33 use WeBWorK::ContentGenerator::ProblemSet; 34 use WeBWorK::ContentGenerator::GatewayQuiz; 35 use WeBWorK::ContentGenerator::ProblemSets; 36 use WeBWorK::ContentGenerator::Test; 37 use WeBWorK::CourseEnvironment; 38 use WeBWorK::DB; 39 40 sub dispatch($) { 41 my ($apache) = @_; 42 my $r = Apache::Request->new($apache); 43 # have to deal with unpredictable GET or POST data, and sift 44 # through it for the key. So use Apache::Request 45 46 # This stuff is pretty much copied out of the O'Reilly mod_perl book. 47 # It's for figuring out the basepath. I may change this up if I find a 48 # better way to do it. 49 my $path_info = $r->path_info || ""; 50 $path_info =~ s!/+!/!g; # strip multiple forward slashes 51 my $current_uri = $r->uri; 52 my $args = $r->args; 53 54 my ($urlRoot) = $current_uri =~ m/^(.*)$path_info/; 55 56 # If it's a valid WeBWorK URI, it ends in a /. This is assumed 57 # alllll over the place. 58 unless (substr($current_uri,-1) eq '/') { 59 $r->header_out(Location => "$current_uri/" . ($args ? "?$args" : "")); 60 return REDIRECT; 61 # *** any post data gets lost here -- fix that. 62 # (actually, it's not a problem, since all URLs generated 63 # from within the system have trailing slashes, and we don't 64 # need POST data from outside the system anyway!) 65 } 66 67 # Create the @components array, which contains the path specified in the URL 68 my($junk, @components) = split "/", $path_info; 69 my $webwork_root = $r->dir_config('webwork_root'); # From a PerlSetVar in httpd.conf 70 my $pg_root = $r->dir_config('pg_root'); # From a PerlSetVar in httpd.conf 71 my $course = shift @components; 72 73 # Try to get the course environment. 74 my $ce = eval {WeBWorK::CourseEnvironment->new($webwork_root, $urlRoot, $pg_root, $course);}; 75 if ($@) { # If there was an error getting the requested course 76 die "Failed to read course environment for $course: $@"; 77 } 78 79 # If no course was specified, redirect to the home URL 80 unless (defined $course) { 81 $r->header_out(Location => $ce->{webworkURLs}->{home}); 82 return REDIRECT; 83 } 84 85 # Freak out if the requested course doesn't exist. For now, this is just a 86 # check to see if the course directory exists. 87 my $courseDir = $ce->{webworkDirs}->{courses} . "/$course"; 88 unless (-e $courseDir) { 89 die "Course directory for $course ($courseDir) not found. Perhaps the course does not exist?"; 90 } 91 92 # Bring up a connection to the database (for Authen/Authz, and eventually 93 # to be passed to content generators, when we clean this file up). 94 my $db = WeBWorK::DB->new($ce); 95 96 ### Begin dispatching ### 97 98 # WeBWorK::Authen::verify erases the passwd field and sets the key field 99 # if login is successful. 100 if (!WeBWorK::Authen->new($r, $ce, $db)->verify) { 101 return WeBWorK::ContentGenerator::Login->new($r, $ce, $db)->go; 102 } else { 103 # After we are authenticated, there are some things that need to be 104 # sorted out, Authorization-wize, before we start dispatching to individual 105 # content generators. 106 my $user = $r->param("user"); 107 my $effectiveUser = $r->param("effectiveUser") || $user; 108 my $su_authorized = WeBWorK::Authz->new($r, $ce, $db)->hasPermissions($user, "become_student", $effectiveUser); 109 $effectiveUser = $user unless $su_authorized; 110 $r->param("effectiveUser", $effectiveUser); 111 112 my $arg = shift @components; 113 if (!defined $arg) { # We want the list of problem sets 114 return WeBWorK::ContentGenerator::ProblemSets->new($r, $ce, $db)->go; 115 } elsif ($arg eq "hardcopy") { 116 my $hardcopyArgument = shift @components; 117 $hardcopyArgument = "" unless defined $hardcopyArgument; 118 return WeBWorK::ContentGenerator::Hardcopy->new($r, $ce, $db)->go($hardcopyArgument); 119 } elsif ($arg eq "instructor") { 120 my $instructorArgument = shift @components; 121 if (!defined $instructorArgument) { 122 return WeBWorK::ContentGenerator::Instructor::Index->new($r, $ce, $db)->go; 123 } elsif ($instructorArgument eq "users") { 124 return WeBWorK::ContentGenerator::Instructor::UserList->new($r, $ce, $db)->go; 125 } elsif ($instructorArgument eq "sets") { 126 my $setID = shift @components; 127 if (defined $setID) { 128 my $setArg = shift @components; 129 if (!defined $setArg) { 130 return WeBWorK::ContentGenerator::Instructor::ProblemSetEditor->new($r, $ce, $db)->go($setID); 131 } elsif ($setArg eq "problems") { 132 return WeBWorK::ContentGenerator::Instructor::ProblemList->new($r, $ce, $db)->go($setID); 133 } elsif ($setArg eq "users") { 134 return WeBWorK::ContentGenerator::Instructor::UserList->new($r, $ce, $db)->go($setID); 135 } 136 } else { 137 return WeBWorK::ContentGenerator::Instructor::ProblemSetList->new($r, $ce, $db)->go; 138 } 139 } elsif ($instructorArgument eq "pgProblemEditor") { 140 return WeBWorK::ContentGenerator::Instructor::PGProblemEditor->new($r, $ce, $db)->go(@components); 141 } 142 } elsif ($arg eq "options") { 143 return WeBWorK::ContentGenerator::Options->new($r, $ce, $db)->go; 144 } elsif ($arg eq "feedback") { 145 return WeBWorK::ContentGenerator::Feedback->new($r, $ce, $db)->go; 146 } elsif ($arg eq "logout") { 147 return WeBWorK::ContentGenerator::Logout->new($r, $ce, $db)->go; 148 } elsif ($arg eq "test") { 149 return WeBWorK::ContentGenerator::Test->new($r, $ce, $db)->go; 150 } elsif ($arg eq "quiz_mode" ) { 151 # Gateway quiz capability -- very similar to problem set (initially) 152 return WeBWorK::ContentGenerator::GatewayQuiz->new($r, $ce, $db)->go(@components); 153 } else { # We've got the name of a problem set. 154 my $problem_set = $arg; 155 my $ps_arg = shift @components; 156 157 if (!defined $ps_arg) { 158 # list the problems in the problem set 159 return WeBWorK::ContentGenerator::ProblemSet->new($r, $ce, $db)->go($problem_set); 160 } else { 161 # We've got the name of a problem 162 my $problem = $ps_arg; 163 return WeBWorK::ContentGenerator::Problem->new($r, $ce, $db)->go($problem_set, $problem); 164 } 165 } 166 167 } 168 169 # If the dispatcher doesn't know any modules that want to handle 170 # the current path, it'll claim that the path does not exist by 171 # declining the request. 172 return DECLINED; 173 } 174 175 1;
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