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Created the top-level module WeBWorK, which now contains the dispatch code. Apache::WeBWorK now only contains the installation of the error handling code and a call to WeBWorK::dispatch(). This error handling code is installed before the WeBWorK module is compiled. -sam
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::Login; 28 use WeBWorK::ContentGenerator::Logout; 29 use WeBWorK::ContentGenerator::Options; 30 use WeBWorK::ContentGenerator::Problem; 31 use WeBWorK::ContentGenerator::ProblemSet; 32 use WeBWorK::ContentGenerator::ProblemSets; 33 use WeBWorK::ContentGenerator::Test; 34 use WeBWorK::CourseEnvironment; 35 use WeBWorK::DB; 36 37 sub dispatch($) { 38 my ($apache) = @_; 39 my $r = Apache::Request->new($apache); 40 # have to deal with unpredictable GET or POST data, and sift 41 # through it for the key. So use Apache::Request 42 43 # This stuff is pretty much copied out of the O'Reilly mod_perl book. 44 # It's for figuring out the basepath. I may change this up if I find a 45 # better way to do it. 46 my $path_info = $r->path_info || ""; 47 my $current_uri = $r->uri; 48 my $args = $r->args; 49 50 $current_uri =~ m/^(.*)$path_info/; 51 my $urlRoot = $1; 52 53 # If it's a valid WeBWorK URI, it ends in a /. This is assumed 54 # alllll over the place. 55 unless (substr($current_uri,-1) eq '/') { 56 $r->header_out(Location => "$current_uri/" . ($args ? "?$args" : "")); 57 return REDIRECT; 58 # *** any post data gets lost here -- fix that. 59 } 60 61 # Create the @components array, which contains the path specified in the URL 62 my($junk, @components) = split "/", $path_info; 63 my $webwork_root = $r->dir_config('webwork_root'); # From a PerlSetVar in httpd.conf 64 my $course = shift @components; 65 66 # Try to get the course environment. 67 my $ce = eval {WeBWorK::CourseEnvironment->new($webwork_root, $urlRoot, $course);}; 68 if ($@) { # If there was an error getting the requested course 69 # TODO: display an error page. For now, 404 it. 70 warn $@; 71 return DECLINED; 72 } 73 74 # If no course was specified, redirect to the home URL 75 unless (defined $course) { 76 $r->header_out(Location => $ce->{webworkURLs}->{home}); 77 return REDIRECT; 78 } 79 80 # Freak out if the requested course doesn't exist. For now, this is just a 81 # check to see if the course directory exists. 82 if (!-e $ce->{webworkDirs}->{courses} . "/$course") { 83 warn "Course directory for $course not found at " 84 . $ce->{webworkDirs}->{courses} . "/$course" ."\n"; 85 return DECLINED; 86 } 87 88 # Bring up a connection to the database (for Authen/Authz, and eventually 89 # to be passed to content generators, when we clean this file up). 90 my $db = WeBWorK::DB->new($ce); 91 92 ### Begin dispatching ### 93 94 # WeBWorK::Authen::verify erases the passwd field and sets the key field 95 # if login is successful. 96 if (!WeBWorK::Authen->new($r, $ce, $db)->verify) { 97 return WeBWorK::ContentGenerator::Login->new($r, $ce, $db)->go; 98 } else { 99 # After we are authenticated, there are some things that need to be 100 # sorted out, Authorization-wize, before we start dispatching to individual 101 # content generators. 102 my $user = $r->param("user"); 103 my $effectiveUser = $r->param("effectiveUser") || $user; 104 my $su_authorized = WeBWorK::Authz->new($r, $ce, $db)->hasPermissions($user, "become_student", $effectiveUser); 105 $effectiveUser = $user unless $su_authorized; 106 $r->param("effectiveUser", $effectiveUser); 107 108 my $arg = shift @components; 109 if (!defined $arg) { # We want the list of problem sets 110 return WeBWorK::ContentGenerator::ProblemSets->new($r, $ce, $db)->go; 111 } elsif ($arg eq "hardcopy") { 112 my $hardcopyArgument = shift @components; 113 $hardcopyArgument = "" unless defined $hardcopyArgument; 114 return WeBWorK::ContentGenerator::Hardcopy->new($r, $ce, $db)->go($hardcopyArgument); 115 } elsif ($arg eq "instructor") { 116 my $instructorArgument = shift @components; 117 if (!defined $instructorArgument) { 118 return WeBWorK::ContentGenerator::Instructor::Index->new($r, $ce, $db)->go; 119 } elsif ($instructorArgument eq "userList") { 120 return WeBWorK::ContentGenerator::Instructor::UserList->new($r, $ce, $db)->go; 121 } elsif ($instructorArgument eq "problemSetList") { 122 return WeBWorK::ContentGenerator::Instructor::ProblemSetList->new($r, $ce, $db)->go; 123 } elsif ($instructorArgument eq "problemSetEditor") { 124 return WeBWorK::ContentGenerator::Instructor::ProblemSetEditor->new($r, $ce, $db)->go(@components); 125 } elsif ($instructorArgument eq "pgProblemEditor") { 126 return WeBWorK::ContentGenerator::Instructor::PGProblemEditor->new($r, $ce, $db)->go(@components); 127 } 128 } elsif ($arg eq "options") { 129 return WeBWorK::ContentGenerator::Options->new($r, $ce, $db)->go; 130 } elsif ($arg eq "feedback") { 131 return WeBWorK::ContentGenerator::Feedback->new($r, $ce, $db)->go; 132 } elsif ($arg eq "logout") { 133 return WeBWorK::ContentGenerator::Logout->new($r, $ce, $db)->go; 134 } elsif ($arg eq "test") { 135 return WeBWorK::ContentGenerator::Test->new($r, $ce, $db)->go; 136 } else { # We've got the name of a problem set. 137 my $problem_set = $arg; 138 my $ps_arg = shift @components; 139 140 if (!defined $ps_arg) { 141 # list the problems in the problem set 142 return WeBWorK::ContentGenerator::ProblemSet->new($r, $ce, $db)->go($problem_set); 143 } else { 144 # We've got the name of a problem 145 my $problem = $ps_arg; 146 return WeBWorK::ContentGenerator::Problem->new($r, $ce, $db)->go($problem_set, $problem); 147 } 148 } 149 150 } 151 152 # If the dispatcher doesn't know any modules that want to handle 153 # the current path, it'll claim that the path does not exist by 154 # declining the request. 155 return DECLINED; 156 } 157 158 1;
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