1: # The LearningOnline Network with CAPA
2: # Server for RAT Maps
3: #
4: # $Id: lonratsrv.pm,v 1.29 2005/02/17 09:09:57 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:
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: $outstr.='res';
122: } elsif ($token->[1] eq 'condition') {
123: # ------------------------------------------------------------------- Condition
124: $outstr.='<&>objcont';
125: if ($token->[2]->{'id'}) {
126: $outstr.='<:>'.$token->[2]->{'id'};
127: if ($obj[$token->[2]->{'id'}]==1) {
128: $errtext.='Error: multiple use of ID '.
129: $token->[2]->{'id'}.'. ';
130: }
131: $obj[$token->[2]->{'id'}]=1;
132: } else {
133: my $i=1;
134: while (($i<=$#obj) && ($obj[$i]!=0)) { $i++; }
135: $outstr.='<:>'.$i;
136: $obj[$i]=1;
137: }
138: $outstr.='<:>';
139: $outstr.=qtunescape($token->[2]->{'value'}).':';
140: if ($token->[2]->{'type'}) {
141: $outstr.=$token->[2]->{'type'}.':';
142: } else {
143: $outstr.='normal:';
144: }
145: $outstr.='cond';
146: } elsif ($token->[1] eq 'link') {
147: # ----------------------------------------------------------------------- Links
148: $outstr.='<&>objlinks';
149:
150: if ($token->[2]->{'index'}) {
151: if ($links[$token->[2]->{'index'}]) {
152: $errtext.='Error: multiple use of link index '.
153: $token->[2]->{'index'}.'. ';
154: }
155: $outstr.='<:>'.$token->[2]->{'index'};
156: $links[$token->[2]->{'index'}]=1;
157: } else {
158: my $i=1;
159: while (($i<=$#links) && ($links[$i]==1)) { $i++; }
160: $outstr.='<:>'.$i;
161: $links[$i]=1;
162: }
163:
164: $outstr.='<:>'.$token->[2]->{'from'}.
165: ':'.$token->[2]->{'to'};
166: if ($token->[2]->{'condition'}) {
167: $outstr.=':'.$token->[2]->{'condition'};
168: } else {
169: $outstr.=':0';
170: }
171: # ------------------------------------------------------------------- Parameter
172: } elsif ($token->[1] eq 'param') {
173: $outstr.='<&>objparms<:>'.$token->[2]->{'to'}.'<:>'.
174: $token->[2]->{'type'}.'___'.$token->[2]->{'name'}
175: .'___'.$token->[2]->{'value'};
176: } elsif ($graphmode) {
177: # --------------------------------------------- All other tags (graphical only)
178: $outstr.='<&>'.$token->[1];
179: if (defined($token->[2]->{'index'})) {
180: $outstr.='<:>'.$token->[2]->{'index'};
181: if ($token->[1] eq 'obj') {
182: $obj[$token->[2]->{'index'}]=2;
183: }
184: }
185: $outstr.='<:>'.$token->[2]->{'value'};
186: }
187: }
188: }
189:
190: } else {
191: $errtext.='Map not loaded: The file does not exist. ';
192: }
193: return($outstr,$errtext,$infotext);
194: }
195:
196:
197: # ----------------------------------------------------------- Saves map to disk
198:
199: sub savemap {
200: my ($fn,$errtext)=@_;
201: my $infotext='';
202: my %alltypes;
203: my %allvalues;
204: if (($fn=~/\.sequence(\.tmp)*$/) ||
205: ($fn=~/\.page(\.tmp)*$/)) {
206:
207: # ------------------------------------------------------------- Deal with input
208: my @tags=split(/<&>/,$ENV{'form.output'});
209: my $outstr='';
210: my $graphdef=0;
211: if ($tags[0] eq 'graphdef<:>yes') {
212: $outstr='<map mode="rat/graphical">'."\n";
213: $graphdef=1;
214: } else {
215: $outstr="<map>\n";
216: }
217: foreach (@tags) {
218: my @parts=split(/<:>/,$_);
219: if ($parts[0] eq 'objcont') {
220: my @comp=split(/:/,$parts[$#parts]);
221: # --------------------------------------------------------------- Logical input
222: if ($comp[$#comp] eq 'res') {
223: $comp[0]=qtescape($comp[0]);
224: $comp[1]=qtescape($comp[1]);
225: if ($comp[2] eq 'true') {
226: if ($comp[1]!~/^http\:\/\//) {
227: $comp[1]='http://'.$comp[1];
228: }
229: $comp[1].='" external="true';
230: } else {
231: if ($comp[1]=~/^http\:\/\//) {
232: $comp[1]=~s/^http\:\/\/[^\/]*\//\//;
233: }
234: }
235: $outstr.='<resource id="'.$parts[1].'" src="'
236: .$comp[1].'"';
237:
238: if (($comp[3] ne '') && ($comp[3] ne 'normal')) {
239: $outstr.=' type="'.$comp[3].'"';
240: }
241: if ($comp[0] ne '') {
242: $outstr.=' title="'.$comp[0].'"';
243: }
244: $outstr.="></resource>\n";
245: } elsif ($comp[$#comp] eq 'cond') {
246: $outstr.='<condition id="'.$parts[1].'"';
247: if (($comp[1] ne '') && ($comp[1] ne 'normal')) {
248: $outstr.=' type="'.$comp[1].'"';
249: }
250: $outstr.=' value="'.qtescape($comp[0]).'"';
251: $outstr.="></condition>\n";
252: }
253: } elsif ($parts[0] eq 'objlinks') {
254: my @comp=split(/:/,$parts[$#parts]);
255: $outstr.='<link';
256: $outstr.=' from="'.$comp[0].'"';
257: $outstr.=' to="'.$comp[1].'"';
258: if (($comp[2] ne '') && ($comp[2]!=0)) {
259: $outstr.=' condition="'.$comp[2].'"';
260: }
261: $outstr.=' index="'.$parts[1].'"';
262: $outstr.="></link>\n";
263: } elsif ($parts[0] eq 'objparms') {
264: undef %alltypes;
265: undef %allvalues;
266: foreach (split(/:/,$parts[$#parts])) {
267: my ($type,$name,$value)=split(/\_\_\_/,$_);
268: $alltypes{$name}=$type;
269: $allvalues{$name}=$value;
270: }
271: foreach (keys %allvalues) {
272: if ($allvalues{$_} ne '') {
273: $outstr.='<param to="'.$parts[1].'" type="'
274: .$alltypes{$_}.'" name="'.$_
275: .'" value="'.$allvalues{$_}.'">'
276: ."</param>\n";
277: }
278: }
279: } elsif (($parts[0] ne '') && ($graphdef)) {
280: # ------------------------------------------------------------- Graphical input
281: $outstr.='<'.$parts[0];
282: if ($#parts==2) {
283: $outstr.=' index="'.$parts[1].'"';
284: }
285: $outstr.=' value="'.qtescape($parts[$#parts]).'"></'.
286: $parts[0].">\n";
287: }
288: }
289: $outstr.="</map>\n";
290: if ($fn=~/^\/*uploaded\/(\w+)\/(\w+)\/(.*)$/) {
291: $ENV{'form.output'}=$outstr;
292: my $home=&Apache::lonnet::homeserver($2,$1);
293: my $result=&Apache::lonnet::finishuserfileupload($2,$1,$home,
294: 'output',$3);
295: if ($result != m|^/uploaded/|) {
296: $errtext.='Map not saved: A network error occured when trying to save the map. ';
297: }
298: } else {
299: my $fh;
300: if ($fh=Apache::File->new(">$fn")) {
301: print $fh $outstr;
302: $infotext.="Map saved as $fn. ";
303: } else {
304: $errtext.='Could not write file '.$fn.'. Map not saved. ';
305: }
306: }
307: } else {
308: # -------------------------------------------- Cannot write to that file, error
309: $errtext.='Map not saved: The specified path does not exist. ';
310: }
311: return ($errtext,$infotext);
312: }
313:
314: # ================================================================ Main Handler
315:
316: sub handler {
317: my $r=shift;
318: &Apache::loncommon::content_type($r,'text/html');
319: $r->send_http_header;
320:
321: return OK if $r->header_only;
322:
323: my $url=$r->uri;
324: $url=~/\/(\w+)\/ratserver$/;
325: my $mode=$1;
326:
327: $url=~s/\/loadonly\/ratserver$/\/save\/ratserver/;
328:
329: my $fn=$r->filename;
330: my $lonDocRoot=$r->dir_config('lonDocRoot');
331: if ( $fn =~ /$lonDocRoot/ ) {
332: #internal authentication, needs fixup.
333: $fn = $url;
334: $fn=~s|^/~(\w+)|/home/$1/public_html|;
335: $fn=~s|/[^/]*/ratserver$||;
336: }
337: my $errtext='';
338: my $infotext='';
339: my $outtext='';
340:
341: if ($mode ne 'loadonly') {
342: ($errtext,$infotext)=&savemap($fn,$errtext);
343: }
344: ($outtext,$errtext,$infotext)=&loadmap($fn,$errtext,$infotext);
345:
346: $r->print(<<ENDDOCUMENT);
347: <html>
348: <body bgcolor="#FFFFFF">
349: <form name=storage method=post action="$url">
350: <input type=hidden name=output value="$outtext">
351: </form>
352: <script>
353: parent.flag=1;
354: </script>
355: ENDDOCUMENT
356: if (($errtext ne '') || ($infotext ne '')) {
357: $r->print(<<ENDSCRIPT);
358: <script>
359: alert("$infotext $errtext");
360: </script>
361: ENDSCRIPT
362: }
363: $r->print("</body>\n</html>\n");
364:
365: return OK;
366: }
367:
368: 1;
369: __END__
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