version 1.101, 2010/01/26 01:16:30
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version 1.108, 2011/06/06 16:08:45
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Line 49 use lib '/home/httpd/lib/perl/';
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Line 49 use lib '/home/httpd/lib/perl/';
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use LONCAPA; |
use LONCAPA; |
use URI::Escape; |
use URI::Escape; |
use IO::Socket::INET; |
use IO::Socket::INET; |
use IO::Socket::SSL; |
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# ====================================================================== Header |
# ====================================================================== Header |
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Line 166 sub clean_out_math_mode {
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Line 165 sub clean_out_math_mode {
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sub displaystyle { |
sub displaystyle { |
my ($texstring)=@_; |
my ($texstring)=@_; |
#has a $$ or \[ or \displaystyle in it, guessinng it's display mode |
#has a $$ or \[ or \displaystyle or eqnarray in it, guessinng it's display mode |
if ($$texstring=~/[^\\]\$\$/ || |
if ($$texstring=~/[^\\]\$\$/ || |
$$texstring=~/\\\[/ || |
$$texstring=~/\\\[/ || |
$$texstring=~/\\displaystyle/) { return 1; } |
$$texstring=~/\\displaystyle/ || |
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$$texstring=~/eqnarray/ |
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) { return 1; } |
return 0; |
return 0; |
} |
} |
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Line 246 sub init_math_support {
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Line 247 sub init_math_support {
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sub mimetex_valign { |
sub mimetex_valign { |
my ($esc_texstring)=@_; |
my ($esc_texstring)=@_; |
my $valign = 0; |
my $valign = 0; |
my $lonhost = $Apache::lonnet::perlvar{'lonHostID'}; |
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my $hostname = &Apache::lonnet::hostname($lonhost); |
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my $protocol = $Apache::lonnet::protocol{$lonhost}; |
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my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring; |
my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring; |
my $socket; |
my $socket; |
&Apache::lonxml::start_alarm(); |
&Apache::lonxml::start_alarm(); |
if ($protocol eq 'https') { |
$socket = IO::Socket::INET->new(PeerAddr => 'localhost', |
$socket = IO::Socket::SSL->new(PeerAddr => $hostname, |
PeerPort => 'http(80)', |
PeerPort => 'https(443)', |
Proto => 'tcp'); |
Proto => 'tcp'); |
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} else { |
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$socket = IO::Socket::INET->new(PeerAddr => $hostname, |
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PeerPort => 'http(80)', |
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Proto => 'tcp'); |
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} |
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if ($socket) { |
if ($socket) { |
my $headreq = "HEAD $path HTTP/1.0\r\n\r\n"; |
my $headreq = "HEAD $path HTTP/1.0\r\n\r\n"; |
print $socket $headreq; |
print $socket $headreq; |
Line 269 sub mimetex_valign {
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Line 261 sub mimetex_valign {
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$valign = $1; |
$valign = $1; |
} |
} |
} |
} |
if ($protocol eq 'https') { |
$socket->close(); |
$socket->close(SSL_no_shutdown => 1, |
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SSL_ctx_free => 1); |
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} else { |
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$socket->close(); |
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} |
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} |
} |
&Apache::lonxml::end_alarm(); |
&Apache::lonxml::end_alarm(); |
return $valign; |
return $valign; |
Line 302 sub mimetex_converted {
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Line 289 sub mimetex_converted {
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my $valign = &mimetex_valign($esc_texstring); |
my $valign = &mimetex_valign($esc_texstring); |
my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />'; |
my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />'; |
if ($displaystyle) { |
if ($displaystyle) { |
$result='<center>'.$result.'</center>'; |
$result='<div style="text-align:center">'.$result.'</div>'; |
} |
} |
return $result; |
return $result; |
} |
} |
Line 326 sub converted {
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Line 313 sub converted {
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sub to_convert { |
sub to_convert { |
my ($string) = @_; |
my ($string) = @_; |
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&init_tth(); |
$string=~s/\<br\s*\/?\>/ /gs; |
$string=~s/\<br\s*\/?\>/ /gs; |
# $string=~s/\s/ /gs; |
# $string=~s/\s/ /gs; |
$string=&HTML::Entities::decode($string); |
$string=&HTML::Entities::decode($string); |
Line 334 sub to_convert {
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Line 322 sub to_convert {
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sub smiley { |
sub smiley { |
my $expression=shift; |
my $expression=shift; |
if ($env{'browser.imagesuppress'} eq 'on') { return $expression; } |
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my %smileys=( |
my %smileys=( |
'\:\-*\)' => 'face-smile.png', |
'\:\-*\)' => 'face-smile.png', |
'8\-\)' => 'face-cool.png', |
'8\-\)' => 'face-cool.png', |
Line 373 sub smiley {
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Line 360 sub smiley {
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sub msgtexconverted { |
sub msgtexconverted { |
my ($message,$email) = @_; |
my ($message,$email) = @_; |
$errorstring=''; |
$errorstring=''; |
&init_tth(); |
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my $outmessage=''; |
my $outmessage=''; |
my $tex=0; |
my $tex=0; |
foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
Line 394 sub msgtexconverted {
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Line 380 sub msgtexconverted {
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foreach my $fragment (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i, |
foreach my $fragment (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i, |
$message)) { |
$message)) { |
if ($tex) { |
if ($tex) { |
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my $algebra = &algebra($fragment, 'web', undef, undef, undef, undef, 'tth'); |
if ($email) { |
if ($email) { |
$outmessage.='</pre><tt>'.&algebra($fragment,'web').'</tt><pre>'; |
$outmessage.='</pre><tt>'.$algebra.'</tt><pre>'; |
$tex=0; |
$tex=0; |
} else { |
} else { |
$outmessage.=&algebra($fragment,'web'); |
$outmessage.=$algebra; |
$tex=0; |
$tex=0; |
} |
} |
} else { |
} else { |
$outmessage.=$fragment; |
$outmessage.=$fragment; |
$tex=1; |
$tex=1; |
} |
} |
} |
} |
Line 415 sub msgtexconverted {
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Line 402 sub msgtexconverted {
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sub algebra { |
sub algebra { |
use AlgParser; |
use AlgParser; |
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my ($string,$target,$style,$parstack,$safeeval,$tth)=@_; |
my ($string,$target,$style,$parstack,$safeeval)=@_; |
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my $parser = new AlgParserWithImplicitExpand; |
my $parser = new AlgParserWithImplicitExpand; |
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if ($tth eq 'tth') {&init_tth();} |
$string=&prepare_algebra($string); |
$string=&prepare_algebra($string); |
my $ret = $parser->parse($string); |
my $ret = $parser->parse($string); |
my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
Line 528 Header
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Line 515 Header
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=item init_math_support() |
=item init_math_support() |
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=item mimetex_valign() |
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Makes a HEAD call to /cgi-bin/mimetex.cgi via IO:: to retrieve the |
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vertical alignment, before the subsequent call to mimetex_converted() |
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which generates the <img> tag and the corresponding image. |
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Input: 1. $esc_texstring (escaped TeX to be rendered by mimetex). |
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Output: 1. $valign - number of pixels: positive or negative integer |
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which will be included in <img> tag for mimetex image to |
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support vertical alignment of image within a line of text. |
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If a server is running SSL, and Apache rewrite rules are in place |
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to rewrite requests for http to https, modification will most likely |
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be needed for pass through for HEAD requests for /cgi-bin/mimetex.cgi. |
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Example rewrite rules which rewrite all http traffic to https, |
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except HEAD requests for /cgi-bin/mimetex.cgi are: |
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<IfModule mod_rewrite.c> |
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RewriteEngine On |
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RewriteLogLevel 0 |
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RewriteCond %{HTTPS} off |
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RewriteCond %{HTTP:Host} (.*) |
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RewriteCond %{REQUEST_METHOD} !HEAD |
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RewriteRule ^/(.*) https://%1/$1 [R=301,L] |
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RewriteCond %{HTTPS} off |
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RewriteCond %{HTTP:Host} (.*) |
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RewriteCond %{REQUEST_METHOD} HEAD |
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RewriteCond %{REQUEST_URI} !^/cgi-bin/mimetex.cgi |
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RewriteRule ^/(.*) https://%1/$1 [R=301,L] |
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</IfModule> |
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=item mimetex_converted() |
=item mimetex_converted() |
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