Project: search.cgi cs149 - PERL programming Submitted by: Sheshagiri Pai Instructor and Guide: Professor Jon Degallier Date: 05/22/2006

Executive Summary Fetch strings according to search criteria From the messages in the message board Display the search results Link the search results to the messages by message id

Setup Place search.cgi file in the student home directory by ftp chmode the file to 755 Login as user tt2 with password ********* Go to discussion board Click on the Search menu item This should bring up The “SEARCH” page.

Search page description Search Criteria: Any - any word present in the message All the words - in no particular order All the words - in order Expression - using AND or OR Search input - text box for the words to be searched Exact Match - if checked, else search is case-insensitive Search button - for carrying out the search and displaying the results

Query string params When search menu item is clicked, the search.cgi page is invoked with the following parameters: querystring: class=26930&&admin_id=jond&admin_name=Jon%20Degallier&b oard_name=26930&board_code=jond26930&name=Sheshagiri%20 ne

Main Algorithm if (!param('search_data')) { &create_form(); } else { &print_search_before_result(); &get_n_prepare_data(); foreach { &get_messages($topic); foreach { &separate_thread($message_file); foreach $message { if(&find_match()) { &process_found_message(); &print_search_result(); } } } } &print_search_after_result(); }

Search Form

Search Form - contd..

Search Results

Search Results - Linked Message

Create Form The parameters from the query string are gathered and passed as hidden parameters Also passed are the parameters for ‘search text’ and ‘exact match checkbox’ $userid = param('userid'); $board_code = param('board_code'); $admin_id = param('admin_id'); $class = param('class'); $board_name = param('board_name'); $topic_name = param('topic_name'); $name = param('name'); $group = param('group'); $ = param(' '); $admin_name = param('admin_name'); $admin_ = param('admin_ ');

Create Form - contd.. SEARCH Enter the string to search in the message boards Any All NO order All IN order Expression Search String: Exact Match:

Highlights : Existing methods get_n_prepare_data() open( INPUT, "<../../teachers/jond/boards/$board_name/topics.dat") or die("could not open boards/$board_name/topics.dat\n = = ; separate_thread() if($message_file =~ /\d$/) { open(INPUT, " = ; close INPUT; } # split the message by 'message_id::' to into a 'thread' array $thread = split(/message_id:: /, $thread);

Find Match sub find_match() { $menu_item = param('option'); # Take action based on the user's choice if ($menu_item == 1) { return &search_any(); } elsif ($menu_item == 2) { return &search_all_no_order(); } elsif ($menu_item == 3) { return &search_all_in_order(); } elsif ($menu_item == 4) { return &search_with_expression(); } else { print ” You have to select a criteria\n "; exit; }

Find Match - search_any() sub search_any() { #print "Search Any\n"; # method 1: find any of the terms in one message # loop through search array and search message content $search = = split(" ", { if($match eq "on") { if($message =~ m/\b$_\b/) { $search = 1; last; } } else { if($message =~ m/\b$_\b/i) { $search = 1; last; } return $search; }

Find Match - search_all_no_order() sub search_all_no_order() { #print "Search All in No order\n"; # method 2: find all the terms in one message $search = = split(" ", { if($match eq "on") { $search = 1; } else { $search = 0; last; } else { if($message =~ m/\b$_\b/i) { $search = 1; } else { $search = 0; last; } return $search; }

Find Match - search_all_in_order() sub search_all_in_order() { #print "Search All in order\n"; # method 3: find all the terms in order $search = 0; $search_all_order = if($match eq "on") { if($message =~ m/\b$search_all_order\b/) { $search = 1; } else { $search = 0; } else { if($message =~ m/\b$search_all_order\b/i) { $search = 1; } else { $search = 0; } return $search; }

Find Match - search_with_expression() Show in actual code

Process Found Message sub process_found_message() { # grab writer's name, message id, date, and subject # concatenate the above in one string separated by pipes(|) # push string to $found string $message = &trim($message); #print($message); $message_id_only = substr $message, 0, index($message, 'date_time::'); $message_id = "message_id:: "."$message_id_only"; #print("$message_id\n"); my $subject = substr $message, index($message, 'subject:: '), index($message, 'attach:: ')-index($message, 'subject:: '); #print("$subject\n"); $found = "$message_id"."|"."$date_time"."|"."$from"."|"."$subject"; #print(" $found "); }

Print Search Result sub print_search_result() { #foreach { # build a table of all found messages with links #containing all cgi variables in a string $userid_new = substr($userid, 0, -1); $name_new = substr($name, 0, -1); $ _new = substr($ , 0, -1); $admin_id_new = substr($admin_id, 0, -1); $admin_name_new = substr($admin_name, 0, -1); $board_name_new = substr($board_name, 0, -1); $board_code_new = substr($board_code, 0, -1); $group_new = substr($group, 0, -1); $message_id_only =~ s/^\s+//; #print($message_id_only);

Print Search Result - contd.. print(" <a href=\"new_message.cgi?userid=$userid_new&name=$name& =$ _new&". "admin_id=$admin_id_new&admin_name=$admin_name_new&board_name= $board_name_new&board_code=$board_code_new&". "group=$group_new&topic_name=$topic_path&message_id=$message_id_on ly\" target = \"_blank\">$found "); #} #end loop of found array }

Thanks Q & A