1: # The LearningOnline Network with CAPA
2: # Server for RAT Maps
3: #
4: # $Id: lonratsrv.pm,v 1.36 2006/07/21 00:21:42 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonratsrv;
30:
31: use strict;
32: use Apache::Constants qw(:common);
33: use Apache::File;
34: use HTML::TokeParser;
35: use Apache::lonnet;
36: use Apache::groupsort();
37:
38: # ------------------------------------------------------------- From RAT to XML
39:
40: sub qtescape {
41: my $str=shift;
42: $str=~s/\:/\:/g;
43: $str=~s/\&\#58\;/\:/g;
44: $str=~s/\&\#39\;/\'/g;
45: $str=~s/\&\#44\;/\,/g;
46: $str=~s/\"/\&\#34\;/g;
47: return $str;
48: }
49:
50: # ------------------------------------------------------------- From XML to RAT
51:
52: sub qtunescape {
53: my $str=shift;
54: $str=~s/\:/\&colon\;/g;
55: $str=~s/\'/\&\#39\;/g;
56: $str=~s/\,/\&\#44\;/g;
57: $str=~s/\"/\&\#34\;/g;
58: return $str;
59: }
60:
61: # --------------------------------------------------------- Loads map from disk
62:
63: sub loadmap {
64: my ($fn,$errtext,$infotext)=@_;
65: if ($errtext) { return('',$errtext); }
66: my $outstr='';
67: my @obj=();
68: my @links=();
69: my $instr='';
70: if ($fn=~/^\/*uploaded\//) {
71: $instr=&Apache::lonnet::getfile($fn);
72: } elsif (-e $fn) {
73: my @content=();
74: {
75: my $fh=Apache::File->new($fn);
76: @content=<$fh>;
77: }
78: $instr=join('',@content);
79: }
80: if ($instr eq -2) {
81: $errtext.='Map not loaded: An error occured while trying to load the map.';
82: } elsif ($instr) {
83: my $parser = HTML::TokeParser->new(\$instr);
84: my $token;
85: my $graphmode=0;
86:
87: $fn=~/\.(\w+)$/;
88: $outstr="mode<:>$1";
89:
90: while ($token = $parser->get_token) {
91: if ($token->[0] eq 'S') {
92: if ($token->[1] eq 'map') {
93: $graphmode=($token->[2]->{'mode'} eq 'rat/graphical');
94: } elsif ($token->[1] eq 'resource') {
95: # -------------------------------------------------------------------- Resource
96: $outstr.='<&>objcont';
97: if (defined($token->[2]->{'id'})) {
98: $outstr.='<:>'.$token->[2]->{'id'};
99: if ($obj[$token->[2]->{'id'}]==1) {
100: $errtext.='Error: multiple use of ID '.
101: $token->[2]->{'id'}.'. ';
102: }
103: $obj[$token->[2]->{'id'}]=1;
104: } else {
105: my $i=1;
106: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
107: $outstr.='<:>'.$i;
108: $obj[$i]=1;
109: }
110: $outstr.='<:>';
111: $outstr.=qtunescape($token->[2]->{'title'}).":";
112: $outstr.=qtunescape($token->[2]->{'src'}).":";
113: if ($token->[2]->{'external'} eq 'true') {
114: $outstr.='true:';
115: } else {
116: $outstr.='false:';
117: }
118: if (defined($token->[2]->{'type'})) {
119: $outstr.=$token->[2]->{'type'}.':';
120: } else {
121: $outstr.='normal:';
122: }
123: if ($token->[2]->{'type'} ne 'zombie') {
124: $outstr.='res';
125: } else {
126: $outstr.='zombie';
127: }
128: } elsif ($token->[1] eq 'condition') {
129: # ------------------------------------------------------------------- Condition
130: $outstr.='<&>objcont';
131: if (defined($token->[2]->{'id'})) {
132: $outstr.='<:>'.$token->[2]->{'id'};
133: if ($obj[$token->[2]->{'id'}]==1) {
134: $errtext.='Error: multiple use of ID '.
135: $token->[2]->{'id'}.'. ';
136: }
137: $obj[$token->[2]->{'id'}]=1;
138: } else {
139: my $i=1;
140: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
141: $outstr.='<:>'.$i;
142: $obj[$i]=1;
143: }
144: $outstr.='<:>';
145: $outstr.=qtunescape($token->[2]->{'value'}).':';
146: if (defined($token->[2]->{'type'})) {
147: $outstr.=$token->[2]->{'type'}.':';
148: } else {
149: $outstr.='normal:';
150: }
151: $outstr.='cond';
152: } elsif ($token->[1] eq 'link') {
153: # ----------------------------------------------------------------------- Links
154: $outstr.='<&>objlinks';
155:
156: if (defined($token->[2]->{'index'})) {
157: if ($links[$token->[2]->{'index'}]) {
158: $errtext.='Error: multiple use of link index '.
159: $token->[2]->{'index'}.'. ';
160: }
161: $outstr.='<:>'.$token->[2]->{'index'};
162: $links[$token->[2]->{'index'}]=1;
163: } else {
164: my $i=1;
165: while (($i<=$#links) && ($links[$i]==1)) { $i++; }
166: $outstr.='<:>'.$i;
167: $links[$i]=1;
168: }
169:
170: $outstr.='<:>'.$token->[2]->{'from'}.
171: ':'.$token->[2]->{'to'};
172: if (defined($token->[2]->{'condition'})) {
173: $outstr.=':'.$token->[2]->{'condition'};
174: } else {
175: $outstr.=':0';
176: }
177: # ------------------------------------------------------------------- Parameter
178: } elsif ($token->[1] eq 'param') {
179: $outstr.='<&>objparms<:>'.$token->[2]->{'to'}.'<:>'.
180: $token->[2]->{'type'}.'___'.$token->[2]->{'name'}
181: .'___'.$token->[2]->{'value'};
182: } elsif ($graphmode) {
183: # --------------------------------------------- All other tags (graphical only)
184: $outstr.='<&>'.$token->[1];
185: if (defined($token->[2]->{'index'})) {
186: $outstr.='<:>'.$token->[2]->{'index'};
187: if ($token->[1] eq 'obj') {
188: $obj[$token->[2]->{'index'}]=2;
189: }
190: }
191: $outstr.='<:>'.$token->[2]->{'value'};
192: }
193: }
194: }
195:
196: } else {
197: $errtext.='Map not loaded: The file does not exist. ';
198: }
199: return($outstr,$errtext,$infotext);
200: }
201:
202:
203: # ----------------------------------------------------------- Saves map to disk
204:
205: sub savemap {
206: my ($fn,$errtext)=@_;
207: my $infotext='';
208: my %alltypes;
209: my %allvalues;
210: if (($fn=~/\.sequence(\.tmp)*$/) ||
211: ($fn=~/\.page(\.tmp)*$/)) {
212:
213: # ------------------------------------------------------------- Deal with input
214: my @tags=split(/<&>/,$env{'form.output'});
215: my $outstr='';
216: my $graphdef=0;
217: if ($tags[0] eq 'graphdef<:>yes') {
218: $outstr='<map mode="rat/graphical">'."\n";
219: $graphdef=1;
220: } else {
221: $outstr="<map>\n";
222: }
223: foreach (@tags) {
224: my @parts=split(/<:>/,$_);
225: if ($parts[0] eq 'objcont') {
226: my @comp=split(/:/,$parts[$#parts]);
227: # --------------------------------------------------------------- Logical input
228: if (($comp[$#comp] eq 'res') || ($comp[$#comp] eq 'zombie')) {
229: $comp[0]=qtescape($comp[0]);
230: $comp[1]=qtescape($comp[1]);
231: if ($comp[2] eq 'true') {
232: if ($comp[1]!~/^http\:\/\//) {
233: $comp[1]='http://'.$comp[1];
234: }
235: $comp[1].='" external="true';
236: } else {
237: if ($comp[1]=~/^http\:\/\//) {
238: $comp[1]=~s/^http\:\/\/[^\/]*\//\//;
239: }
240: }
241: $outstr.='<resource id="'.$parts[1].'" src="'
242: .$comp[1].'"';
243:
244: if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
245: $outstr.=' type="'.$comp[3].'"';
246: }
247: if ($comp[0] ne '') {
248: $outstr.=' title="'.$comp[0].'"';
249: }
250: $outstr.=" />\n";
251: } elsif ($comp[$#comp] eq 'cond') {
252: $outstr.='<condition id="'.$parts[1].'"';
253: if (($comp[1] ne '') && ($comp[1] ne 'normal')) {
254: $outstr.=' type="'.$comp[1].'"';
255: }
256: $outstr.=' value="'.qtescape($comp[0]).'"';
257: $outstr.=" />\n";
258: }
259: } elsif ($parts[0] eq 'objlinks') {
260: my @comp=split(/:/,$parts[$#parts]);
261: $outstr.='<link';
262: $outstr.=' from="'.$comp[0].'"';
263: $outstr.=' to="'.$comp[1].'"';
264: if (($comp[2] ne '') && ($comp[2]!=0)) {
265: $outstr.=' condition="'.$comp[2].'"';
266: }
267: $outstr.=' index="'.$parts[1].'"';
268: $outstr.=" />\n";
269: } elsif ($parts[0] eq 'objparms') {
270: undef %alltypes;
271: undef %allvalues;
272: foreach (split(/:/,$parts[$#parts])) {
273: my ($type,$name,$value)=split(/\_\_\_/,$_);
274: $alltypes{$name}=$type;
275: $allvalues{$name}=$value;
276: }
277: foreach (keys %allvalues) {
278: if ($allvalues{$_} ne '') {
279: $outstr.='<param to="'.$parts[1].'" type="'
280: .$alltypes{$_}.'" name="'.$_
281: .'" value="'.$allvalues{$_}.'" />'
282: ."\n";
283: }
284: }
285: } elsif (($parts[0] ne '') && ($graphdef)) {
286: # ------------------------------------------------------------- Graphical input
287: $outstr.='<'.$parts[0];
288: if ($#parts==2) {
289: $outstr.=' index="'.$parts[1].'"';
290: }
291: $outstr.=' value="'.qtescape($parts[$#parts]).'" />'."\n";
292: }
293: }
294: $outstr.="</map>\n";
295: if ($fn=~/^\/*uploaded\/(\w+)\/(\w+)\/(.*)$/) {
296: $env{'form.output'}=$outstr;
297: my $result=&Apache::lonnet::finishuserfileupload($2,$1,
298: 'output',$3);
299: if ($result != m|^/uploaded/|) {
300: $errtext.='Map not saved: A network error occured when trying to save the map. ';
301: }
302: } else {
303: my $fh;
304: if ($fh=Apache::File->new(">$fn")) {
305: print $fh $outstr;
306: $infotext.="Map saved as $fn. ";
307: } else {
308: $errtext.='Could not write file '.$fn.'. Map not saved. ';
309: }
310: }
311: } else {
312: # -------------------------------------------- Cannot write to that file, error
313: $errtext.='Map not saved: The specified path does not exist. ';
314: }
315: &Apache::groupsort::clear_basket();
316: return ($errtext,$infotext);
317: }
318:
319: # ================================================================ Main Handler
320:
321: sub handler {
322: my $r=shift;
323: &Apache::loncommon::content_type($r,'text/html');
324: $r->send_http_header;
325:
326: return OK if $r->header_only;
327:
328: my $url=$r->uri;
329: $url=~/\/(\w+)\/ratserver$/;
330: my $mode=$1;
331:
332: $url=~s/\/loadonly\/ratserver$/\/save\/ratserver/;
333:
334: my $fn=$r->filename;
335: my $lonDocRoot=$r->dir_config('lonDocRoot');
336: if ( $fn =~ /$lonDocRoot/ ) {
337: #internal authentication, needs fixup.
338: $fn = $url;
339: $fn=~s|^/~(\w+)|/home/$1/public_html|;
340: $fn=~s|/[^/]*/ratserver$||;
341: }
342: my $errtext='';
343: my $infotext='';
344: my $outtext='';
345:
346: if ($mode ne 'loadonly') {
347: ($errtext,$infotext)=&savemap($fn,$errtext);
348: }
349: ($outtext,$errtext,$infotext)=&loadmap($fn,$errtext,$infotext);
350:
351: my $start_page =
352: &Apache::loncommon::start_page('Alert',undef,
353: {'only_body' => 1,
354: 'bgcolor' => '#FFFFFF',});
355: my $end_page =
356: &Apache::loncommon::end_page();
357:
358: $r->print(<<ENDDOCUMENT);
359: $start_page
360: <form name="storage" method="post" action="$url">
361: <input type="hidden" name="output" value="$outtext" />
362: </form>
363: <script type ="text/javascript">
364: parent.flag=1;
365: </script>
366: ENDDOCUMENT
367: if (($errtext ne '') || ($infotext ne '')) {
368: $r->print(<<ENDSCRIPT);
369: <script type="text/javascript">
370: alert("$infotext $errtext");
371: </script>
372: ENDSCRIPT
373: }
374: $r->print($end_page);
375:
376: return OK;
377: }
378:
379: 1;
380: __END__
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