Annotation of loncom/xml/lonxml.pm, revision 1.72
1.2 sakharuk 1: # The LearningOnline Network with CAPA
1.3 sakharuk 2: # XML Parser Module
1.2 sakharuk 3: #
1.3 sakharuk 4: # last modified 06/26/00 by Alexander Sakharuk
1.33 www 5: # 11/6 Gerd Kortemeyer
1.45 www 6: # 6/1/1 Gerd Kortemeyer
1.56 albertel 7: # 2/21,3/13 Guy
1.68 www 8: # 3/29,5/4 Gerd Kortemeyer
1.2 sakharuk 9:
1.4 albertel 10: package Apache::lonxml;
1.33 www 11: use vars
1.72 ! albertel 12: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate);
1.1 sakharuk 13: use strict;
14: use HTML::TokeParser;
1.3 sakharuk 15: use Safe;
1.40 albertel 16: use Safe::Hole;
1.13 albertel 17: use Opcode;
1.72 ! albertel 18:
! 19: sub register {
! 20: my $space;
! 21: my @taglist;
! 22: my $temptag;
! 23: ($space,@taglist) = @_;
! 24: foreach $temptag (@taglist) {
! 25: $Apache::lonxml::alltags{$temptag}=$space;
! 26: }
! 27: }
! 28:
1.46 www 29: use Apache::Constants qw(:common);
1.71 www 30: use Apache::lontexconvert;
1.72 ! albertel 31: use Apache::style;
! 32: use Apache::run;
! 33: use Apache::londefdef;
! 34: use Apache::scripttag;
! 35: use Apache::edit;
! 36: #================================================== Main subroutine: xmlparse
! 37: #debugging control, to turn on debugging modify the correct handler
! 38: $Apache::lonxml::debug=0;
! 39:
! 40: #path to the directory containing the file currently being processed
! 41: @pwd=();
! 42:
! 43: #these two are used for capturing a subset of the output for later processing,
! 44: #don't touch them directly use &startredirection and &endredirection
! 45: @outputstack = ();
! 46: $redirection = 0;
! 47:
! 48: #controls wheter the <import> tag actually does
! 49: $import = 1;
! 50: @extlinks=();
! 51:
! 52: # meta mode is a bit weird only some output is to be turned off
! 53: #<output> tag turns metamode off (defined in londefdef.pm)
! 54: $metamode = 0;
! 55:
! 56: # turns on and of run::evaluate actually derefencing var refs
! 57: $evaluate = 1;
1.7 albertel 58:
1.68 www 59:
60: sub xmlbegin {
61: my $output='';
62: if ($ENV{'browser.mathml'}) {
63: $output='<?xml version="1.0"?>'
64: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
65: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
66: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
67: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
68: .'xmlns="http://www.w3.org/TR/REC-html40">';
69: } else {
70: $output='<html>';
71: }
72: return $output;
73: }
74:
75: sub xmlend {
76: return '</html>';
77: }
78:
1.70 www 79: sub fontsettings() {
80: my $headerstring='';
81: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
82: $headerstring.=
83: '<meta Content-Type="text/html; charset=x-mac-roman">';
84: }
85: return $headerstring;
86: }
87:
1.68 www 88: sub registerurl {
89: return (<<ENDSCRIPT);
90: <script language="JavaScript">
1.71 www 91: // BEGIN LON-CAPA Internal
1.69 www 92: function LONCAPAreg() {
93: if (window.location.pathname!="/res/adm/pages/menu.html") {
94: menu=window.open("","LONCAPAmenu");
95: menu.currentURL=window.location.pathname;
96: menu.currentStale=0;
97: }
98: }
99:
100: function LONCAPAstale() {
101: if (window.location.pathname!="/res/adm/pages/menu.html") {
102: menu=window.open("","LONCAPAmenu");
103: menu.currentStale=1;
104: }
1.68 www 105: }
1.71 www 106: // END LON-CAPA Internal
1.68 www 107: </script>
108: ENDSCRIPT
1.69 www 109: }
110:
111: sub loadevents() {
112: return 'LONCAPAreg();';
113: }
114:
115: sub unloadevents() {
116: return 'LONCAPAstale();';
1.68 www 117: }
118:
1.48 albertel 119: sub printalltags {
120: my $temp;
121: foreach $temp (sort keys %Apache::lonxml::alltags) {
1.64 albertel 122: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
1.48 albertel 123: }
124: }
1.31 sakharuk 125:
1.3 sakharuk 126: sub xmlparse {
127:
1.18 albertel 128: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
1.41 albertel 129: if ($target eq 'meta') {
1.59 albertel 130: $Apache::lonxml::redirection = 0;
131: $Apache::lonxml::metamode = 1;
1.72 ! albertel 132: $Apache::lonxml::evaluate = 1;
1.55 albertel 133: $Apache::lonxml::import = 0;
1.47 albertel 134: } elsif ($target eq 'grade') {
1.55 albertel 135: &startredirection;
1.59 albertel 136: $Apache::lonxml::metamode = 0;
1.72 ! albertel 137: $Apache::lonxml::evaluate = 1;
1.55 albertel 138: $Apache::lonxml::import = 1;
1.72 ! albertel 139: } elsif ($target eq 'modified') {
! 140: $Apache::lonxml::redirection = 0;
! 141: $Apache::lonxml::metamode = 0;
! 142: $Apache::lonxml::evaluate = 0;
! 143: $Apache::lonxml::import = 0;
1.44 albertel 144: } else {
1.72 ! albertel 145: $Apache::lonxml::redirection = 0;
1.59 albertel 146: $Apache::lonxml::metamode = 0;
1.72 ! albertel 147: $Apache::lonxml::evaluate = 1;
1.55 albertel 148: $Apache::lonxml::import = 1;
1.32 sakharuk 149: }
1.48 albertel 150: #&printalltags();
1.16 albertel 151: my @pars = ();
1.23 albertel 152: @Apache::lonxml::pwd=();
153: my $pwd=$ENV{'request.filename'};
154: $pwd =~ s:/[^/]*$::;
155: &newparser(\@pars,\$content_file_string,$pwd);
1.3 sakharuk 156: my $currentstring = '';
157: my $finaloutput = '';
158: my $newarg = '';
1.16 albertel 159: my $result;
1.24 sakharuk 160:
1.3 sakharuk 161: my $safeeval = new Safe;
1.40 albertel 162: my $safehole = new Safe::Hole;
1.6 albertel 163: $safeeval->permit("entereval");
1.13 albertel 164: $safeeval->permit(":base_math");
1.19 albertel 165: $safeeval->deny(":base_io");
1.40 albertel 166: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.19 albertel 167: #need to inspect this class of ops
168: # $safeeval->deny(":base_orig");
1.21 albertel 169: $safeinit .= ';$external::target='.$target.';';
1.26 albertel 170: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
1.21 albertel 171: &Apache::run::run($safeinit,$safeeval);
1.3 sakharuk 172: #-------------------- Redefinition of the target in the case of compound target
173:
174: ($target, my @tenta) = split('&&',$target);
175:
176: my @stack = ();
177: my @parstack = ();
1.17 albertel 178: &initdepth;
1.3 sakharuk 179: my $token;
1.16 albertel 180: while ( $#pars > -1 ) {
181: while ($token = $pars[$#pars]->get_token) {
1.57 albertel 182: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.61 albertel 183: if ($metamode<1) { $result=$token->[1]; }
1.57 albertel 184: } elsif ($token->[0] eq 'PI') {
1.61 albertel 185: if ($metamode<1) { $result=$token->[2]; }
1.16 albertel 186: } elsif ($token->[0] eq 'S') {
187: # add tag to stack
188: push (@stack,$token->[1]);
189: # add parameters list to another stack
190: push (@parstack,&parstring($token));
1.19 albertel 191: &increasedepth($token);
1.16 albertel 192: if (exists $style_for_target{$token->[1]}) {
1.61 albertel 193: if ($Apache::lonxml::redirection) {
1.55 albertel 194: $Apache::lonxml::outputstack['-1'] .=
195: &recurse($style_for_target{$token->[1]},$target,$safeeval,
196: \%style_for_target,@parstack);
1.41 albertel 197: } else {
1.55 albertel 198: $finaloutput .= &recurse($style_for_target{$token->[1]},$target,
199: $safeeval,\%style_for_target,@parstack);
1.41 albertel 200: }
1.16 albertel 201: } else {
1.17 albertel 202: $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
1.41 albertel 203: \@pars, $safeeval, \%style_for_target);
1.16 albertel 204: }
205: } elsif ($token->[0] eq 'E') {
206: #clear out any tags that didn't end
1.55 albertel 207: while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
208: &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
1.43 albertel 209: pop @stack;pop @parstack;&decreasedepth($token);
210: }
1.16 albertel 211:
212: if (exists $style_for_target{'/'."$token->[1]"}) {
1.61 albertel 213: if ($Apache::lonxml::redirection) {
1.55 albertel 214: $Apache::lonxml::outputstack['-1'] .=
215: &recurse($style_for_target{'/'."$token->[1]"},
216: $target,$safeeval,\%style_for_target,@parstack);
217: } else {
218: $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
219: $target,$safeeval,\%style_for_target,
220: @parstack);
221: }
1.59 albertel 222:
1.16 albertel 223: } else {
1.17 albertel 224: $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
1.55 albertel 225: \@pars,$safeeval, \%style_for_target);
1.13 albertel 226: }
1.57 albertel 227: } else {
228: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
1.16 albertel 229: }
1.55 albertel 230: #evaluate variable refs in result
1.25 sakharuk 231: if ($result ne "") {
1.24 sakharuk 232: if ( $#parstack > -1 ) {
1.55 albertel 233: if ($Apache::lonxml::redirection) {
234: $Apache::lonxml::outputstack['-1'] .=
235: &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
236: } else {
237: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
238: $parstack[$#parstack]);
239: }
1.16 albertel 240: } else {
241: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
1.13 albertel 242: }
1.16 albertel 243: $result = '';
1.55 albertel 244: }
245: if ($token->[0] eq 'E') {
246: pop @stack;pop @parstack;&decreasedepth($token);
1.2 sakharuk 247: }
1.5 albertel 248: }
1.16 albertel 249: pop @pars;
1.23 albertel 250: pop @Apache::lonxml::pwd;
1.3 sakharuk 251: }
1.24 sakharuk 252:
1.59 albertel 253: # if ($target eq 'meta') {
254: # $finaloutput.=&endredirection;
255: # }
1.67 www 256:
257: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
258: $finaloutput=&afterburn($finaloutput);
259: }
260:
1.3 sakharuk 261: return $finaloutput;
1.15 albertel 262: }
263:
1.67 www 264:
1.15 albertel 265: sub recurse {
266:
267: my @innerstack = ();
268: my @innerparstack = ();
269: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
1.16 albertel 270: my @pat = ();
1.23 albertel 271: &newparser(\@pat,\$newarg);
1.15 albertel 272: my $tokenpat;
273: my $partstring = '';
274: my $output='';
1.16 albertel 275: my $decls='';
276: while ( $#pat > -1 ) {
277: while ($tokenpat = $pat[$#pat]->get_token) {
1.57 albertel 278: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
1.61 albertel 279: if ($metamode<1) { $partstring=$tokenpat->[1]; }
1.57 albertel 280: } elsif ($tokenpat->[0] eq 'PI') {
1.61 albertel 281: if ($metamode<1) { $partstring=$tokenpat->[2]; }
1.16 albertel 282: } elsif ($tokenpat->[0] eq 'S') {
283: push (@innerstack,$tokenpat->[1]);
284: push (@innerparstack,&parstring($tokenpat));
1.19 albertel 285: &increasedepth($tokenpat);
1.16 albertel 286: $partstring = &callsub("start_$tokenpat->[1]",
287: $target, $tokenpat, \@innerparstack,
288: \@pat, $safeeval, $style_for_target);
289: } elsif ($tokenpat->[0] eq 'E') {
290: #clear out any tags that didn't end
291: while ($tokenpat->[1] ne $innerstack[$#innerstack]
1.43 albertel 292: && ($#innerstack > -1)) {
1.49 albertel 293: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
1.43 albertel 294: pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat);
295: }
1.16 albertel 296: $partstring = &callsub("end_$tokenpat->[1]",
297: $target, $tokenpat, \@innerparstack,
298: \@pat, $safeeval, $style_for_target);
1.57 albertel 299: } else {
300: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
1.16 albertel 301: }
302: #pass both the variable to the style tag, and the tag we
303: #are processing inside the <definedtag>
304: if ( $partstring ne "" ) {
305: if ( $#parstack > -1 ) {
306: if ( $#innerparstack > -1 ) {
307: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
308: } else {
309: $decls= $parstack[$#parstack];
310: }
311: } else {
312: if ( $#innerparstack > -1 ) {
313: $decls=$innerparstack[$#innerparstack];
314: } else {
315: $decls='';
316: }
317: }
318: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
319: $partstring = '';
320: }
1.17 albertel 321: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
1.19 albertel 322: &decreasedepth($tokenpat);}
1.15 albertel 323: }
1.16 albertel 324: pop @pat;
1.23 albertel 325: pop @Apache::lonxml::pwd;
1.15 albertel 326: }
327: return $output;
1.7 albertel 328: }
329:
330: sub callsub {
1.14 albertel 331: my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
1.7 albertel 332: my $currentstring='';
1.72 ! albertel 333: my $nodefault;
1.7 albertel 334: {
1.59 albertel 335: my $sub1;
1.7 albertel 336: no strict 'refs';
1.59 albertel 337: if ($target eq 'edit' && $token->[0] eq 'S') {
338: $currentstring = &Apache::edit::tag_start($target,$token,$parstack,$parser,
339: $safeeval,$style);
340: }
1.68 www 341: my $tag=$token->[1];
342: my $space=$Apache::lonxml::alltags{$tag};
343: if (!$space) {
344: $tag=~tr/A-Z/a-z/;
345: $sub=~tr/A-Z/a-z/;
346: $space=$Apache::lonxml::alltags{$tag}
347: }
348: if ($space) {
1.72 ! albertel 349: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
1.24 sakharuk 350: $sub1="$space\:\:$sub";
1.17 albertel 351: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1.72 ! albertel 352: ($currentstring,$nodefault) = &$sub1($target,$token,$parstack,$parser,
! 353: $safeeval,$style);
1.7 albertel 354: } else {
1.72 ! albertel 355: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
1.62 sakharuk 356: if ($metamode <1) {
357: if (defined($token->[4]) && ($metamode < 1)) {
1.72 ! albertel 358: $currentstring = $token->[4];
1.62 sakharuk 359: } else {
1.72 ! albertel 360: $currentstring = $token->[2];
1.62 sakharuk 361: }
1.7 albertel 362: }
1.59 albertel 363: }
1.72 ! albertel 364: &Apache::lonxml::debug("nodefalt:$nodefault:");
! 365: if ($currentstring eq '' && $nodefault eq '') {
! 366: if ($target eq 'edit') {
! 367: if ($token->[0] eq 'S') {
! 368: $currentstring = &Apache::edit::tag_start($token,$target);
! 369: } elsif ($token->[0] eq 'E') {
! 370: $currentstring = &Apache::edit::tag_end($token,$target);
! 371: }
! 372: } elsif ($target eq 'modified') {
! 373: if ($token->[0] eq 'S') {
! 374: $currentstring = $token->[4];
! 375: } else {
! 376: $currentstring = $token->[2];
! 377: }
! 378: }
1.7 albertel 379: }
380: use strict 'refs';
381: }
382: return $currentstring;
1.17 albertel 383: }
384:
1.55 albertel 385: sub startredirection {
386: $Apache::lonxml::redirection++;
387: push (@Apache::lonxml::outputstack, '');
388: }
389:
390: sub endredirection {
391: if (!$Apache::lonxml::redirection) {
1.72 ! albertel 392: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55 albertel 393: return '';
394: }
395: $Apache::lonxml::redirection--;
396: pop @Apache::lonxml::outputstack;
397: }
398:
1.17 albertel 399: sub initdepth {
400: @Apache::lonxml::depthcounter=();
401: $Apache::lonxml::depth=-1;
402: $Apache::lonxml::olddepth=-1;
403: }
404:
405: sub increasedepth {
1.19 albertel 406: my ($token) = @_;
1.17 albertel 407: $Apache::lonxml::depth++;
408: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
409: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
410: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
411: }
1.42 albertel 412: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 413: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54 albertel 414: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17 albertel 415: }
416:
417: sub decreasedepth {
1.19 albertel 418: my ($token) = @_;
1.17 albertel 419: $Apache::lonxml::depth--;
1.36 albertel 420: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
421: $#Apache::lonxml::depthcounter--;
422: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
423: }
1.43 albertel 424: if ( $Apache::lonxml::depth < -1) {
1.49 albertel 425: &Apache::lonxml::warning("Unbalanced tags in resource");
1.43 albertel 426: $Apache::lonxml::depth='-1';
427: }
1.42 albertel 428: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 429: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54 albertel 430: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1 sakharuk 431: }
1.19 albertel 432:
433: sub get_all_text {
434:
435: my($tag,$pars)= @_;
436: my $depth=0;
437: my $token;
438: my $result='';
1.57 albertel 439: if ( $tag =~ m:^/: ) {
440: my $tag=substr($tag,1);
441: # &Apache::lonxml::debug("have:$tag:");
442: while (($depth >=0) && ($token = $pars->get_token)) {
443: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
444: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
445: $result.=$token->[1];
446: } elsif ($token->[0] eq 'PI') {
447: $result.=$token->[2];
448: } elsif ($token->[0] eq 'S') {
449: if ($token->[1] eq $tag) { $depth++; }
450: $result.=$token->[4];
451: } elsif ($token->[0] eq 'E') {
452: if ( $token->[1] eq $tag) { $depth--; }
453: #skip sending back the last end tag
454: if ($depth > -1) { $result.=$token->[2]; } else {
455: $pars->unget_token($token);
456: }
457: }
458: }
459: } else {
460: while ($token = $pars->get_token) {
461: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
462: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
463: $result.=$token->[1];
464: } elsif ($token->[0] eq 'PI') {
465: $result.=$token->[2];
466: } elsif ($token->[0] eq 'S') {
467: if ( $token->[1] eq $tag) {
468: $pars->unget_token($token); last;
469: } else {
470: $result.=$token->[4];
471: }
472: } elsif ($token->[0] eq 'E') {
473: $result.=$token->[2];
1.36 albertel 474: }
1.19 albertel 475: }
476: }
1.49 albertel 477: # &Apache::lonxml::debug("Exit:$result:");
1.19 albertel 478: return $result
479: }
480:
1.23 albertel 481: sub newparser {
482: my ($parser,$contentref,$dir) = @_;
483: push (@$parser,HTML::TokeParser->new($contentref));
1.56 albertel 484: $$parser['-1']->xml_mode('1');
1.23 albertel 485: if ( $dir eq '' ) {
486: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
487: } else {
488: push (@Apache::lonxml::pwd, $dir);
489: }
490: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
491: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
492: }
1.1 sakharuk 493:
1.8 albertel 494: sub parstring {
495: my ($token) = @_;
496: my $temp='';
1.20 albertel 497: map {
1.35 www 498: unless ($_=~/\W/) {
1.42 albertel 499: my $val=$token->[2]->{$_};
1.53 albertel 500: $val =~ s/([\%\@\\])/\\$1/g;
1.51 albertel 501: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.42 albertel 502: $temp .= "my \$$_=\"$val\";"
1.20 albertel 503: }
504: } @{$token->[3]};
1.8 albertel 505: return $temp;
506: }
1.22 albertel 507:
1.34 www 508: sub writeallows {
509: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
510: my $thisdir=$thisurl;
511: $thisdir=~s/\/[^\/]+$//;
512: my %httpref=();
513: map {
514: $httpref{'httpref.'.
515: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
516: &Apache::lonnet::appenv(%httpref);
517: }
518:
1.66 www 519: #
520: # Afterburner handles anchors, highlights and links
521: #
522: sub afterburn {
523: my $result=shift;
524: map {
525: my ($name, $value) = split(/=/,$_);
526: $value =~ tr/+/ /;
527: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
528: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
529: unless ($ENV{'form.'.$name}) {
530: $ENV{'form.'.$name}=$value;
531: }
532: }
533: } (split(/&/,$ENV{'QUERY_STRING'}));
534: if ($ENV{'form.highlight'}) {
535: map {
536: my $anchorname=$_;
537: my $matchthis=$anchorname;
538: $matchthis=~s/\_+/\\s\+/g;
539: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
540: } split(/\,/,$ENV{'form.highlight'});
541: }
542: if ($ENV{'form.link'}) {
543: map {
544: my ($anchorname,$linkurl)=split(/\>/,$_);
545: my $matchthis=$anchorname;
546: $matchthis=~s/\_+/\\s\+/g;
547: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
548: } split(/\,/,$ENV{'form.link'});
549: }
550: if ($ENV{'form.anchor'}) {
551: my $anchorname=$ENV{'form.anchor'};
552: my $matchthis=$anchorname;
553: $matchthis=~s/\_+/\\s\+/g;
554: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
555: $result.=(<<"ENDSCRIPT");
556: <script>
557: document.location.hash='$anchorname';
558: </script>
559: ENDSCRIPT
560: }
561: return $result;
562: }
563:
1.24 sakharuk 564: sub handler {
565: my $request=shift;
1.68 www 566:
1.64 albertel 567: my $target='web';
1.68 www 568:
1.65 albertel 569: $Apache::lonxml::debug=0;
1.68 www 570:
1.25 sakharuk 571: if ($ENV{'browser.mathml'}) {
1.27 albertel 572: $request->content_type('text/xml');
573: } else {
574: $request->content_type('text/html');
1.25 sakharuk 575: }
1.64 albertel 576:
1.29 sakharuk 577: # $request->print(<<ENDHEADER);
578: #<html>
579: #<head>
580: #<title>Just test</title>
581: #</head>
582: #<body bgcolor="#FFFFFF">
583: #ENDHEADER
584: # &Apache::lonhomework::send_header($request);
1.27 albertel 585: $request->send_http_header;
1.64 albertel 586:
1.45 www 587: return OK if $request->header_only;
1.27 albertel 588:
589:
1.50 albertel 590: my $file=&Apache::lonnet::filelocation("",$request->uri);
1.24 sakharuk 591: my %mystyle;
1.50 albertel 592: my $result = '';
593: my $filecontents=&Apache::lonnet::getfile($file);
594: if ($filecontents == -1) {
595: &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
596: $filecontents='';
597: } else {
598: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1.66 www 599: }
1.50 albertel 600:
1.67 www 601: $request->print($result);
1.64 albertel 602:
1.34 www 603: writeallows($request->uri);
1.45 www 604: return OK;
1.24 sakharuk 605: }
606:
1.22 albertel 607: sub debug {
608: if ($Apache::lonxml::debug eq 1) {
1.54 albertel 609: print "DEBUG:".$_[0]."<br />\n";
1.22 albertel 610: }
611: }
1.49 albertel 612:
1.22 albertel 613: sub error {
1.52 albertel 614: if ($Apache::lonxml::debug eq 1) {
1.55 albertel 615: print "<b>ERROR:</b>".$_[0]."<br />\n";
1.52 albertel 616: } else {
617: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
618: #notify author
619: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
620: #notify course
621: if ( $ENV{'request.course.id'} ) {
622: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
623: foreach my $user (split /\,/, $users) {
624: ($user,my $domain) = split /:/, $user;
1.54 albertel 625: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 626: }
627: }
628:
629: #FIXME probably shouldn't have me get everything forever.
1.54 albertel 630: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
631: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 632: }
1.22 albertel 633: }
1.49 albertel 634:
1.22 albertel 635: sub warning {
1.72 ! albertel 636: #if ($Apache::lonxml::debug eq 1) {
1.55 albertel 637: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1.72 ! albertel 638: # }
1.22 albertel 639: }
640:
1.1 sakharuk 641: 1;
642: __END__
1.68 www 643:
644:
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