1: # The LearningOnline Network with CAPA
2: # Server for RAT Maps
3: #
4: # $Id: lonratsrv.pm,v 1.32 2005/06/13 20:23:53 albertel 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:
37: # ------------------------------------------------------------- From RAT to XML
38:
39: sub qtescape {
40: my $str=shift;
41: $str=~s/\&\#58\;/\:/g;
42: $str=~s/\&\#39\;/\'/g;
43: $str=~s/\&\#44\;/\,/g;
44: $str=~s/\"/\&\#34\;/g;
45: return $str;
46: }
47:
48: # ------------------------------------------------------------- From XML to RAT
49:
50: sub qtunescape {
51: my $str=shift;
52: $str=~s/\:/\&colon\;/g;
53: $str=~s/\'/\&\#39\;/g;
54: $str=~s/\,/\&\#44\;/g;
55: $str=~s/\"/\&\#34\;/g;
56: return $str;
57: }
58:
59: # --------------------------------------------------------- Loads map from disk
60:
61: sub loadmap {
62: my ($fn,$errtext,$infotext)=@_;
63: if ($errtext) { return('',$errtext); }
64: my $outstr='';
65: my @obj=();
66: my @links=();
67: my $instr='';
68: if ($fn=~/^\/*uploaded\//) {
69: $instr=&Apache::lonnet::getfile($fn);
70: } elsif (-e $fn) {
71: my @content=();
72: {
73: my $fh=Apache::File->new($fn);
74: @content=<$fh>;
75: }
76: $instr=join('',@content);
77: }
78: if ($instr eq -2) {
79: $errtext.='Map not loaded: An error occured while trying to load the map.';
80: } elsif ($instr) {
81: my $parser = HTML::TokeParser->new(\$instr);
82: my $token;
83: my $graphmode=0;
84:
85: $fn=~/\.(\w+)$/;
86: $outstr="mode<:>$1";
87:
88: while ($token = $parser->get_token) {
89: if ($token->[0] eq 'S') {
90: if ($token->[1] eq 'map') {
91: $graphmode=($token->[2]->{'mode'} eq 'rat/graphical');
92: } elsif ($token->[1] eq 'resource') {
93: # -------------------------------------------------------------------- Resource
94: $outstr.='<&>objcont';
95: if ($token->[2]->{'id'}) {
96: $outstr.='<:>'.$token->[2]->{'id'};
97: if ($obj[$token->[2]->{'id'}]==1) {
98: $errtext.='Error: multiple use of ID '.
99: $token->[2]->{'id'}.'. ';
100: }
101: $obj[$token->[2]->{'id'}]=1;
102: } else {
103: my $i=1;
104: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
105: $outstr.='<:>'.$i;
106: $obj[$i]=1;
107: }
108: $outstr.='<:>';
109: $outstr.=qtunescape($token->[2]->{'title'}).":";
110: $outstr.=qtunescape($token->[2]->{'src'}).":";
111: if ($token->[2]->{'external'} eq 'true') {
112: $outstr.='true:';
113: } else {
114: $outstr.='false:';
115: }
116: if ($token->[2]->{'type'}) {
117: $outstr.=$token->[2]->{'type'}.':';
118: } else {
119: $outstr.='normal:';
120: }
121: if ($token->[2]->{'type'} ne 'zombie') {
122: $outstr.='res';
123: } else {
124: $outstr.='zombie';
125: }
126: } elsif ($token->[1] eq 'condition') {
127: # ------------------------------------------------------------------- Condition
128: $outstr.='<&>objcont';
129: if ($token->[2]->{'id'}) {
130: $outstr.='<:>'.$token->[2]->{'id'};
131: if ($obj[$token->[2]->{'id'}]==1) {
132: $errtext.='Error: multiple use of ID '.
133: $token->[2]->{'id'}.'. ';
134: }
135: $obj[$token->[2]->{'id'}]=1;
136: } else {
137: my $i=1;
138: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
139: $outstr.='<:>'.$i;
140: $obj[$i]=1;
141: }
142: $outstr.='<:>';
143: $outstr.=qtunescape($token->[2]->{'value'}).':';
144: if ($token->[2]->{'type'}) {
145: $outstr.=$token->[2]->{'type'}.':';
146: } else {
147: $outstr.='normal:';
148: }
149: $outstr.='cond';
150: } elsif ($token->[1] eq 'link') {
151: # ----------------------------------------------------------------------- Links
152: $outstr.='<&>objlinks';
153:
154: if ($token->[2]->{'index'}) {
155: if ($links[$token->[2]->{'index'}]) {
156: $errtext.='Error: multiple use of link index '.
157: $token->[2]->{'index'}.'. ';
158: }
159: $outstr.='<:>'.$token->[2]->{'index'};
160: $links[$token->[2]->{'index'}]=1;
161: } else {
162: my $i=1;
163: while (($i<=$#links) && ($links[$i]==1)) { $i++; }
164: $outstr.='<:>'.$i;
165: $links[$i]=1;
166: }
167:
168: $outstr.='<:>'.$token->[2]->{'from'}.
169: ':'.$token->[2]->{'to'};
170: if ($token->[2]->{'condition'}) {
171: $outstr.=':'.$token->[2]->{'condition'};
172: } else {
173: $outstr.=':0';
174: }
175: # ------------------------------------------------------------------- Parameter
176: } elsif ($token->[1] eq 'param') {
177: $outstr.='<&>objparms<:>'.$token->[2]->{'to'}.'<:>'.
178: $token->[2]->{'type'}.'___'.$token->[2]->{'name'}
179: .'___'.$token->[2]->{'value'};
180: } elsif ($graphmode) {
181: # --------------------------------------------- All other tags (graphical only)
182: $outstr.='<&>'.$token->[1];
183: if (defined($token->[2]->{'index'})) {
184: $outstr.='<:>'.$token->[2]->{'index'};
185: if ($token->[1] eq 'obj') {
186: $obj[$token->[2]->{'index'}]=2;
187: }
188: }
189: $outstr.='<:>'.$token->[2]->{'value'};
190: }
191: }
192: }
193:
194: } else {
195: $errtext.='Map not loaded: The file does not exist. ';
196: }
197: return($outstr,$errtext,$infotext);
198: }
199:
200:
201: # ----------------------------------------------------------- Saves map to disk
202:
203: sub savemap {
204: my ($fn,$errtext)=@_;
205: my $infotext='';
206: my %alltypes;
207: my %allvalues;
208: if (($fn=~/\.sequence(\.tmp)*$/) ||
209: ($fn=~/\.page(\.tmp)*$/)) {
210:
211: # ------------------------------------------------------------- Deal with input
212: my @tags=split(/<&>/,$env{'form.output'});
213: my $outstr='';
214: my $graphdef=0;
215: if ($tags[0] eq 'graphdef<:>yes') {
216: $outstr='<map mode="rat/graphical">'."\n";
217: $graphdef=1;
218: } else {
219: $outstr="<map>\n";
220: }
221: foreach (@tags) {
222: my @parts=split(/<:>/,$_);
223: if ($parts[0] eq 'objcont') {
224: my @comp=split(/:/,$parts[$#parts]);
225: # --------------------------------------------------------------- Logical input
226: if (($comp[$#comp] eq 'res') || ($comp[$#comp] eq 'zombie')) {
227: $comp[0]=qtescape($comp[0]);
228: $comp[1]=qtescape($comp[1]);
229: if ($comp[2] eq 'true') {
230: if ($comp[1]!~/^http\:\/\//) {
231: $comp[1]='http://'.$comp[1];
232: }
233: $comp[1].='" external="true';
234: } else {
235: if ($comp[1]=~/^http\:\/\//) {
236: $comp[1]=~s/^http\:\/\/[^\/]*\//\//;
237: }
238: }
239: $outstr.='<resource id="'.$parts[1].'" src="'
240: .$comp[1].'"';
241:
242: if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
243: $outstr.=' type="'.$comp[3].'"';
244: }
245: if ($comp[0] ne '') {
246: $outstr.=' title="'.$comp[0].'"';
247: }
248: $outstr.=" />\n";
249: } elsif ($comp[$#comp] eq 'cond') {
250: $outstr.='<condition id="'.$parts[1].'"';
251: if (($comp[1] ne '') && ($comp[1] ne 'normal')) {
252: $outstr.=' type="'.$comp[1].'"';
253: }
254: $outstr.=' value="'.qtescape($comp[0]).'"';
255: $outstr.=" />\n";
256: }
257: } elsif ($parts[0] eq 'objlinks') {
258: my @comp=split(/:/,$parts[$#parts]);
259: $outstr.='<link';
260: $outstr.=' from="'.$comp[0].'"';
261: $outstr.=' to="'.$comp[1].'"';
262: if (($comp[2] ne '') && ($comp[2]!=0)) {
263: $outstr.=' condition="'.$comp[2].'"';
264: }
265: $outstr.=' index="'.$parts[1].'"';
266: $outstr.=" />\n";
267: } elsif ($parts[0] eq 'objparms') {
268: undef %alltypes;
269: undef %allvalues;
270: foreach (split(/:/,$parts[$#parts])) {
271: my ($type,$name,$value)=split(/\_\_\_/,$_);
272: $alltypes{$name}=$type;
273: $allvalues{$name}=$value;
274: }
275: foreach (keys %allvalues) {
276: if ($allvalues{$_} ne '') {
277: $outstr.='<param to="'.$parts[1].'" type="'
278: .$alltypes{$_}.'" name="'.$_
279: .'" value="'.$allvalues{$_}.'" />'
280: ."\n";
281: }
282: }
283: } elsif (($parts[0] ne '') && ($graphdef)) {
284: # ------------------------------------------------------------- Graphical input
285: $outstr.='<'.$parts[0];
286: if ($#parts==2) {
287: $outstr.=' index="'.$parts[1].'"';
288: }
289: $outstr.=' value="'.qtescape($parts[$#parts]).'" />'."\n";
290: }
291: }
292: $outstr.="</map>\n";
293: if ($fn=~/^\/*uploaded\/(\w+)\/(\w+)\/(.*)$/) {
294: $env{'form.output'}=$outstr;
295: my $result=&Apache::lonnet::finishuserfileupload($2,$1,
296: 'output',$3);
297: if ($result != m|^/uploaded/|) {
298: $errtext.='Map not saved: A network error occured when trying to save the map. ';
299: }
300: } else {
301: my $fh;
302: if ($fh=Apache::File->new(">$fn")) {
303: print $fh $outstr;
304: $infotext.="Map saved as $fn. ";
305: } else {
306: $errtext.='Could not write file '.$fn.'. Map not saved. ';
307: }
308: }
309: } else {
310: # -------------------------------------------- Cannot write to that file, error
311: $errtext.='Map not saved: The specified path does not exist. ';
312: }
313: return ($errtext,$infotext);
314: }
315:
316: # ================================================================ Main Handler
317:
318: sub handler {
319: my $r=shift;
320: &Apache::loncommon::content_type($r,'text/html');
321: $r->send_http_header;
322:
323: return OK if $r->header_only;
324:
325: my $url=$r->uri;
326: $url=~/\/(\w+)\/ratserver$/;
327: my $mode=$1;
328:
329: $url=~s/\/loadonly\/ratserver$/\/save\/ratserver/;
330:
331: my $fn=$r->filename;
332: my $lonDocRoot=$r->dir_config('lonDocRoot');
333: if ( $fn =~ /$lonDocRoot/ ) {
334: #internal authentication, needs fixup.
335: $fn = $url;
336: $fn=~s|^/~(\w+)|/home/$1/public_html|;
337: $fn=~s|/[^/]*/ratserver$||;
338: }
339: my $errtext='';
340: my $infotext='';
341: my $outtext='';
342:
343: if ($mode ne 'loadonly') {
344: ($errtext,$infotext)=&savemap($fn,$errtext);
345: }
346: ($outtext,$errtext,$infotext)=&loadmap($fn,$errtext,$infotext);
347:
348: $r->print(<<ENDDOCUMENT);
349: <html>
350: <body bgcolor="#FFFFFF">
351: <form name=storage method=post action="$url">
352: <input type=hidden name=output value="$outtext">
353: </form>
354: <script>
355: parent.flag=1;
356: </script>
357: ENDDOCUMENT
358: if (($errtext ne '') || ($infotext ne '')) {
359: $r->print(<<ENDSCRIPT);
360: <script>
361: alert("$infotext $errtext");
362: </script>
363: ENDSCRIPT
364: }
365: $r->print("</body>\n</html>\n");
366:
367: return OK;
368: }
369:
370: 1;
371: __END__
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