1: # The LearningOnline Network with CAPA
2: # Server for RAT Maps
3: #
4: # $Id: lonratsrv.pm,v 1.34 2005/10/31 18:52:10 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/\:/\:/g;
42: $str=~s/\&\#58\;/\:/g;
43: $str=~s/\&\#39\;/\'/g;
44: $str=~s/\&\#44\;/\,/g;
45: $str=~s/\"/\&\#34\;/g;
46: return $str;
47: }
48:
49: # ------------------------------------------------------------- From XML to RAT
50:
51: sub qtunescape {
52: my $str=shift;
53: $str=~s/\:/\&colon\;/g;
54: $str=~s/\'/\&\#39\;/g;
55: $str=~s/\,/\&\#44\;/g;
56: $str=~s/\"/\&\#34\;/g;
57: return $str;
58: }
59:
60: # --------------------------------------------------------- Loads map from disk
61:
62: sub loadmap {
63: my ($fn,$errtext,$infotext)=@_;
64: if ($errtext) { return('',$errtext); }
65: my $outstr='';
66: my @obj=();
67: my @links=();
68: my $instr='';
69: if ($fn=~/^\/*uploaded\//) {
70: $instr=&Apache::lonnet::getfile($fn);
71: } elsif (-e $fn) {
72: my @content=();
73: {
74: my $fh=Apache::File->new($fn);
75: @content=<$fh>;
76: }
77: $instr=join('',@content);
78: }
79: if ($instr eq -2) {
80: $errtext.='Map not loaded: An error occured while trying to load the map.';
81: } elsif ($instr) {
82: my $parser = HTML::TokeParser->new(\$instr);
83: my $token;
84: my $graphmode=0;
85:
86: $fn=~/\.(\w+)$/;
87: $outstr="mode<:>$1";
88:
89: while ($token = $parser->get_token) {
90: if ($token->[0] eq 'S') {
91: if ($token->[1] eq 'map') {
92: $graphmode=($token->[2]->{'mode'} eq 'rat/graphical');
93: } elsif ($token->[1] eq 'resource') {
94: # -------------------------------------------------------------------- Resource
95: $outstr.='<&>objcont';
96: if (defined($token->[2]->{'id'})) {
97: $outstr.='<:>'.$token->[2]->{'id'};
98: if ($obj[$token->[2]->{'id'}]==1) {
99: $errtext.='Error: multiple use of ID '.
100: $token->[2]->{'id'}.'. ';
101: }
102: $obj[$token->[2]->{'id'}]=1;
103: } else {
104: my $i=1;
105: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
106: $outstr.='<:>'.$i;
107: $obj[$i]=1;
108: }
109: $outstr.='<:>';
110: $outstr.=qtunescape($token->[2]->{'title'}).":";
111: $outstr.=qtunescape($token->[2]->{'src'}).":";
112: if ($token->[2]->{'external'} eq 'true') {
113: $outstr.='true:';
114: } else {
115: $outstr.='false:';
116: }
117: if (defined($token->[2]->{'type'})) {
118: $outstr.=$token->[2]->{'type'}.':';
119: } else {
120: $outstr.='normal:';
121: }
122: if ($token->[2]->{'type'} ne 'zombie') {
123: $outstr.='res';
124: } else {
125: $outstr.='zombie';
126: }
127: } elsif ($token->[1] eq 'condition') {
128: # ------------------------------------------------------------------- Condition
129: $outstr.='<&>objcont';
130: if (defined($token->[2]->{'id'})) {
131: $outstr.='<:>'.$token->[2]->{'id'};
132: if ($obj[$token->[2]->{'id'}]==1) {
133: $errtext.='Error: multiple use of ID '.
134: $token->[2]->{'id'}.'. ';
135: }
136: $obj[$token->[2]->{'id'}]=1;
137: } else {
138: my $i=1;
139: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
140: $outstr.='<:>'.$i;
141: $obj[$i]=1;
142: }
143: $outstr.='<:>';
144: $outstr.=qtunescape($token->[2]->{'value'}).':';
145: if (defined($token->[2]->{'type'})) {
146: $outstr.=$token->[2]->{'type'}.':';
147: } else {
148: $outstr.='normal:';
149: }
150: $outstr.='cond';
151: } elsif ($token->[1] eq 'link') {
152: # ----------------------------------------------------------------------- Links
153: $outstr.='<&>objlinks';
154:
155: if (defined($token->[2]->{'index'})) {
156: if ($links[$token->[2]->{'index'}]) {
157: $errtext.='Error: multiple use of link index '.
158: $token->[2]->{'index'}.'. ';
159: }
160: $outstr.='<:>'.$token->[2]->{'index'};
161: $links[$token->[2]->{'index'}]=1;
162: } else {
163: my $i=1;
164: while (($i<=$#links) && ($links[$i]==1)) { $i++; }
165: $outstr.='<:>'.$i;
166: $links[$i]=1;
167: }
168:
169: $outstr.='<:>'.$token->[2]->{'from'}.
170: ':'.$token->[2]->{'to'};
171: if (defined($token->[2]->{'condition'})) {
172: $outstr.=':'.$token->[2]->{'condition'};
173: } else {
174: $outstr.=':0';
175: }
176: # ------------------------------------------------------------------- Parameter
177: } elsif ($token->[1] eq 'param') {
178: $outstr.='<&>objparms<:>'.$token->[2]->{'to'}.'<:>'.
179: $token->[2]->{'type'}.'___'.$token->[2]->{'name'}
180: .'___'.$token->[2]->{'value'};
181: } elsif ($graphmode) {
182: # --------------------------------------------- All other tags (graphical only)
183: $outstr.='<&>'.$token->[1];
184: if (defined($token->[2]->{'index'})) {
185: $outstr.='<:>'.$token->[2]->{'index'};
186: if ($token->[1] eq 'obj') {
187: $obj[$token->[2]->{'index'}]=2;
188: }
189: }
190: $outstr.='<:>'.$token->[2]->{'value'};
191: }
192: }
193: }
194:
195: } else {
196: $errtext.='Map not loaded: The file does not exist. ';
197: }
198: return($outstr,$errtext,$infotext);
199: }
200:
201:
202: # ----------------------------------------------------------- Saves map to disk
203:
204: sub savemap {
205: my ($fn,$errtext)=@_;
206: my $infotext='';
207: my %alltypes;
208: my %allvalues;
209: if (($fn=~/\.sequence(\.tmp)*$/) ||
210: ($fn=~/\.page(\.tmp)*$/)) {
211:
212: # ------------------------------------------------------------- Deal with input
213: my @tags=split(/<&>/,$env{'form.output'});
214: my $outstr='';
215: my $graphdef=0;
216: if ($tags[0] eq 'graphdef<:>yes') {
217: $outstr='<map mode="rat/graphical">'."\n";
218: $graphdef=1;
219: } else {
220: $outstr="<map>\n";
221: }
222: foreach (@tags) {
223: my @parts=split(/<:>/,$_);
224: if ($parts[0] eq 'objcont') {
225: my @comp=split(/:/,$parts[$#parts]);
226: # --------------------------------------------------------------- Logical input
227: if (($comp[$#comp] eq 'res') || ($comp[$#comp] eq 'zombie')) {
228: $comp[0]=qtescape($comp[0]);
229: $comp[1]=qtescape($comp[1]);
230: if ($comp[2] eq 'true') {
231: if ($comp[1]!~/^http\:\/\//) {
232: $comp[1]='http://'.$comp[1];
233: }
234: $comp[1].='" external="true';
235: } else {
236: if ($comp[1]=~/^http\:\/\//) {
237: $comp[1]=~s/^http\:\/\/[^\/]*\//\//;
238: }
239: }
240: $outstr.='<resource id="'.$parts[1].'" src="'
241: .$comp[1].'"';
242:
243: if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
244: $outstr.=' type="'.$comp[3].'"';
245: }
246: if ($comp[0] ne '') {
247: $outstr.=' title="'.$comp[0].'"';
248: }
249: $outstr.=" />\n";
250: } elsif ($comp[$#comp] eq 'cond') {
251: $outstr.='<condition id="'.$parts[1].'"';
252: if (($comp[1] ne '') && ($comp[1] ne 'normal')) {
253: $outstr.=' type="'.$comp[1].'"';
254: }
255: $outstr.=' value="'.qtescape($comp[0]).'"';
256: $outstr.=" />\n";
257: }
258: } elsif ($parts[0] eq 'objlinks') {
259: my @comp=split(/:/,$parts[$#parts]);
260: $outstr.='<link';
261: $outstr.=' from="'.$comp[0].'"';
262: $outstr.=' to="'.$comp[1].'"';
263: if (($comp[2] ne '') && ($comp[2]!=0)) {
264: $outstr.=' condition="'.$comp[2].'"';
265: }
266: $outstr.=' index="'.$parts[1].'"';
267: $outstr.=" />\n";
268: } elsif ($parts[0] eq 'objparms') {
269: undef %alltypes;
270: undef %allvalues;
271: foreach (split(/:/,$parts[$#parts])) {
272: my ($type,$name,$value)=split(/\_\_\_/,$_);
273: $alltypes{$name}=$type;
274: $allvalues{$name}=$value;
275: }
276: foreach (keys %allvalues) {
277: if ($allvalues{$_} ne '') {
278: $outstr.='<param to="'.$parts[1].'" type="'
279: .$alltypes{$_}.'" name="'.$_
280: .'" value="'.$allvalues{$_}.'" />'
281: ."\n";
282: }
283: }
284: } elsif (($parts[0] ne '') && ($graphdef)) {
285: # ------------------------------------------------------------- Graphical input
286: $outstr.='<'.$parts[0];
287: if ($#parts==2) {
288: $outstr.=' index="'.$parts[1].'"';
289: }
290: $outstr.=' value="'.qtescape($parts[$#parts]).'" />'."\n";
291: }
292: }
293: $outstr.="</map>\n";
294: if ($fn=~/^\/*uploaded\/(\w+)\/(\w+)\/(.*)$/) {
295: $env{'form.output'}=$outstr;
296: my $result=&Apache::lonnet::finishuserfileupload($2,$1,
297: 'output',$3);
298: if ($result != m|^/uploaded/|) {
299: $errtext.='Map not saved: A network error occured when trying to save the map. ';
300: }
301: } else {
302: my $fh;
303: if ($fh=Apache::File->new(">$fn")) {
304: print $fh $outstr;
305: $infotext.="Map saved as $fn. ";
306: } else {
307: $errtext.='Could not write file '.$fn.'. Map not saved. ';
308: }
309: }
310: } else {
311: # -------------------------------------------- Cannot write to that file, error
312: $errtext.='Map not saved: The specified path does not exist. ';
313: }
314: return ($errtext,$infotext);
315: }
316:
317: # ================================================================ Main Handler
318:
319: sub handler {
320: my $r=shift;
321: &Apache::loncommon::content_type($r,'text/html');
322: $r->send_http_header;
323:
324: return OK if $r->header_only;
325:
326: my $url=$r->uri;
327: $url=~/\/(\w+)\/ratserver$/;
328: my $mode=$1;
329:
330: $url=~s/\/loadonly\/ratserver$/\/save\/ratserver/;
331:
332: my $fn=$r->filename;
333: my $lonDocRoot=$r->dir_config('lonDocRoot');
334: if ( $fn =~ /$lonDocRoot/ ) {
335: #internal authentication, needs fixup.
336: $fn = $url;
337: $fn=~s|^/~(\w+)|/home/$1/public_html|;
338: $fn=~s|/[^/]*/ratserver$||;
339: }
340: my $errtext='';
341: my $infotext='';
342: my $outtext='';
343:
344: if ($mode ne 'loadonly') {
345: ($errtext,$infotext)=&savemap($fn,$errtext);
346: }
347: ($outtext,$errtext,$infotext)=&loadmap($fn,$errtext,$infotext);
348:
349: $r->print(<<ENDDOCUMENT);
350: <html>
351: <body bgcolor="#FFFFFF">
352: <form name=storage method=post action="$url">
353: <input type=hidden name=output value="$outtext">
354: </form>
355: <script>
356: parent.flag=1;
357: </script>
358: ENDDOCUMENT
359: if (($errtext ne '') || ($infotext ne '')) {
360: $r->print(<<ENDSCRIPT);
361: <script>
362: alert("$infotext $errtext");
363: </script>
364: ENDSCRIPT
365: }
366: $r->print("</body>\n</html>\n");
367:
368: return OK;
369: }
370:
371: 1;
372: __END__
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