3 Copyright(c)2008 Internet Archive. Software license AGPL version 3.
5 This file is part of GnuBook.
7 GnuBook is free software: you can redistribute it and/or modify
8 it under the terms of the GNU Affero General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GnuBook is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU Affero General Public License for more details.
17 You should have received a copy of the GNU Affero General Public License
18 along with GnuBook. If not, see <http://www.gnu.org/licenses/>.
21 // FIXME: TODO: Change path above to production installation location of perl
22 // when we deploy, Brad Neuberg, bkn3@columbia.edu
28 // slight alterations by Brad Neuberg, bkn3@columbia.edu
30 // ported from perl to php by tracey, Oct 2005
32 //fixxx require_once '/petabox/setup.inc';
33 //I think this fixxx refers to the need to set DOCUMENT_ROOT below -- mang
35 if (strpos($_SERVER["REQUEST_URI"], "/~mang") === 0) { // Serving out of home dir
36 $_SERVER['DOCUMENT_ROOT']='/home/mang/petabox/www/sf';
37 require_once '/home/mang/petabox/setup.inc';
39 $_SERVER['DOCUMENT_ROOT']='/petabox/www/sf';
40 require_once '/petabox/setup.inc';
43 ini_set("memory_limit","200M"); // XML can be big, esp. brittanica (100MB)
45 /////// SETUP /////////////////////////////////////////////////////////////
47 $debug_level = 0; // 0=least, 3=most debugging info
49 $num_pre = 3; // context words before search term
50 $num_post = 9; // context words after search term
52 // defaults for testing (when no args given)
53 $url ='http://ia300202.us.archive.org/0/items/englishbookbindings00davenuoft/englishbookbindings00davenuoft_djvuxml.xml';
59 /////// SETUP /////////////////////////////////////////////////////////////
62 // fixxx prolly should escapesystemcall() these...
63 if (isset($_GET['url']))
65 if (isset($_GET['term']))
66 $term = $_GET['term'];
67 if (isset($_GET['format']))
68 $format = $_GET['format'];
69 if (isset($_GET['callback']))
70 $callback = $_GET['callback'];
72 //$url='http://homeserver.hq.archive.org/metafetch/thespy00cooparch_djvu.xml';
73 //$url='http://homeserver.hq.archive.org/metafetch/oldchristmas00irviarch_djvu.xml';
74 //$url = 'http://homeserver.hq.archive.org/metafetch/intlepisode00jamearch_djvu.xml';
79 // This is kinda weird (confession!) but allows existing calls to "fatal()"
80 // to throw an exception instead of dumping HTML to stdout/browser!
81 $GLOBALS['fatal-exceptions']=1;
87 // pageFiles was added to keep track of on what page each search match was
88 // found, Brad Neuberg, bkn3@columbia.edu
89 // pageHeights and pageWidths was added to track the size of each page so that
90 // we can send it over to the client; this is necessary for scaling the images
91 // for search, Brad Neuberg, bkn3@columbia.edu
94 $pageHeights = array();
95 $pageWidths = array();
98 $time0 = microtime(true);
99 $timestamp = date('Y-m-d H:i:s');
100 $pid = posix_getpid();
101 debug_msg("Invoked at ".$time0."=$timestamp under UID ".posix_getuid(),2);
105 //////////////////////////////////////
107 debug_msg("query: ".$_SERVER['QUERY_STRING'],3);
110 $term = preg_replace('/[^A-Za-z0-9 ]/', ' ', $term); // legal characters
111 $terms = explode(' ',$term);
112 debug_msg("url,term,format: $url,".var_export($terms,true).",$format",3);
115 if ($format == "HTML")
117 echo "<html><head><title>Search</title></head> <body> Searching <p>";
118 $tag_pre = '<b style="color:black;background-color:#A0FFFF">';
121 else if ($format == "XML")
123 if (false === $callback) {
124 header('Content-type: text/xml');
126 header('application/x-javascript');
128 $tag_pre = '</CONTEXT>';
129 $tag_post = '<CONTEXT>';
133 fatal("Unknown format request. ");
137 // This looks like where we load the djvu.xml
138 if (!($document = file_get_contents($url)))
139 fatal("could not load $url");
143 $time1 = microtime(true) - $time0;
146 //// Pass 1 - build up page* arrays with xml fragments corresponding to matches
148 foreach (explode('</OBJECT>', $document) as $page)
151 if (matches_terms($page, $terms) &&
152 // 2nd clause here is to ensure that we aren't matching in the end
153 // of the overall XML document -- thus we ensure that OBJECT tag starts
154 // in the chunk we just were handed. (traceyj)
155 strstr($page, '<OBJECT '))
157 // extract the page value so that we know what page we are on,
158 // Brad Neuberg, bkn3@columbia.edu
159 if (!preg_match('|<PARAM name="PAGE" value="([^"]*)"\s*\/>|', $page, $match))
160 fatal("page value not set on page number $pagenumber in $page!");
161 $pageFile = $match[1];
163 // extract the page width and height, Brad Neuberg, bkn3@columbia.edu
164 if (!preg_match('/width="([^"]*)"/', $page, $match))
165 fatal("page width not set!");
166 $pageWidth = $match[1];
168 if (!preg_match('/height="([^"]*)"/', $page, $match))
169 fatal("page height not set!");
170 $pageHeight = $match[1];
173 foreach (explode('</WORD>',$page) as $token)
175 if (matches_terms($token, $terms))
177 list($junk, $keep) = explode('<WORD ',$token);
178 $token = " $tag_pre<WORD $keep</WORD>$tag_post ";
182 $token = preg_replace('/<[^<]*>/','', $token); //mark-up
183 $token = preg_replace('/[\&\#\d+;]/', ' ', $token);//non-ascii chars
184 $token = preg_replace('/\s+/', ' ', $token); //white space
193 preg_replace('|.*((\W\w*){'.$num_pre.'}'.$tag_pre.')|',"$1",$page_new);
195 preg_replace('/('.$tag_post.'(\w*\W){'.$num_post.'}).*/',"$1",$page_new);
198 // added to keep track of the page we are on
199 // Brad Neuberg, bkn3@columbia.edu
200 $pageFiles [$pagenumber] = $pageFile;
201 $pages [$pagenumber] = $page_new;
202 // added to keep track of page widths and heights
203 $pageWidths [$pagenumber] = $pageWidth;
204 $pageHeights[$pagenumber] = $pageHeight;
209 $time2 = microtime(true) - $time1;
211 //// Pass 2 - generate output from previously built arrays
214 if ($format == "HTML")
216 echo "Found ".count($pages)." pages containing $tag_pre";
218 echo "$tag_post.<br>\n";
219 foreach ($pages as $index => $page)
221 echo "<h4>Page $page:</h4>\n";
225 $time3 = microtime(true) - $time2;
226 echo $tag_pre . "Fetched document in $time1 ms.$tag_post<p>\n";
227 echo $tag_pre . "Processed document in $time2 ms.$tag_post<p>\n";
228 echo $tag_pre . "Printed document in $time3 ms.$tag_post<p>\n";
229 echo "</body></html>\n";
231 else if ($format == "XML")
234 $xml .= '<?xml version="1.0" encoding="utf-8"?>'."\n";
235 // Added to prevent Internet Explorer from adding default XML stylesheet,
236 // which messes up processing, Brad Neuberg, bkn3@columbia.edu
237 $xml .= '<?xml-stylesheet type="text/css" href="blank.css"?>'."\n";//fixxx
240 foreach ($pages as $index => $page)
242 $xml .= "<PAGE file=\"{$pageFiles[$index]}\" width=\"{$pageWidths[$index]}\" height=\"{$pageHeights[$index]}\">\n";
243 $xml .= "<CONTEXT>\n";
245 $xml .= "</CONTEXT>\n";
248 $xml .= "</SEARCH>\n";
250 // The XML contains the page numbers from the DJVU XML. We must remap them to flipbook indices
251 // since the flipbook indices are monotonically increasing generated from the pages with
252 // addToAccessFormats true (maybe)
253 $fsm = FlipSearchMap::buildSearchMap($url);
254 if (false === $callback) {
255 echo $fsm->remapSearch($xml);
257 $patterns[0] = '/\n/';
258 $patterns[1] = "/\'/";
260 $replac[1] = ''';
262 // We don't have FlipSearchMap remap since we have our own mapping between
263 // scandata.xml leaf numbers and GB indices that happens in GBSearchCallback
264 echo "$callback('". preg_replace($patterns, $replac, $xml)."');";
270 debug_msg("Done and exiting!",2);
276 // an internal method call invoked "fatal()"...
277 XML::resultMessage('error','internal_error', $e->getMessage());
283 function matches_terms(&$text, // search space
284 &$terms)// array of search terms
286 foreach ($terms as $term)
288 if (preg_match("/$term/i", $text))
295 function debug_msg($msg, $level)
300 if ($level <= $debug_level)
302 if ($format == "XML")
303 echo "<!-- FILL ($pid):$level: $msg -->\n";
305 echo "FILL ($pid):$level: $msg<br/>\n";