1 | #!/usr/local/bin/perl
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2 |
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3 | $DIFF = "/usr/bin/diff";
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4 | $PERL = "/usr/bin/perl";
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5 |
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6 | use CGI qw(:standard);
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7 | use CGI::Carp;
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8 |
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9 | print header;
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10 | print start_html("File Diff Example");
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11 | print "<strong>Version </strong>$CGI::VERSION<p>";
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12 |
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13 | print <<EOF;
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14 | <H1>File Diff Example</H1>
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15 | Enter two files. When you press "submit" their diff will be
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16 | produced.
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17 | EOF
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18 | ;
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19 |
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20 | # Start a multipart form.
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21 | print start_multipart_form;
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22 | print "File #1:",filefield(-name=>'file1',-size=>45),"<BR>\n";
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23 | print "File #2:",filefield(-name=>'file2',-size=>45),"<BR>\n";
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24 | print "Diff type: ",radio_group(-name=>'type',
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25 | -value=>['context','normal']),"<br>\n";
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26 | print reset,submit(-name=>'submit',-value=>'Do Diff');
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27 | print endform;
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28 |
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29 | # Process the form if there is a file name entered
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30 | $file1 = param('file1');
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31 | $file2 = param('file2');
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32 |
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33 | $|=1; # for buffering
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34 | if ($file1 && $file2) {
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35 | $realfile1 = tmpFileName($file1);
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36 | $realfile2 = tmpFileName($file2);
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37 | print "<HR>\n";
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38 | print "<H2>$file1 vs $file2</H2>\n";
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39 |
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40 | print "<PRE>\n";
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41 | $options = "-c" if param('type') eq 'context';
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42 | system "$DIFF $options $realfile1 $realfile2 | $PERL -pe 's/>/>/g; s/</</g;'";
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43 | close $file1;
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44 | close $file2;
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45 | print "</PRE>\n";
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46 | }
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47 |
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48 | print <<EOF;
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49 | <HR>
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50 | <A HREF="../cgi_docs.html">CGI documentation</A>
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51 | <HR>
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52 | <ADDRESS>
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53 | <A HREF="/~lstein">Lincoln D. Stein</A>
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54 | </ADDRESS><BR>
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55 | Last modified 17 July 1996
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56 | EOF
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57 | ;
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58 | print end_html;
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59 |
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60 | sub sanitize {
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61 | my $name = shift;
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62 | my($safe) = $name=~/([a-zA-Z0-9._~#,]+)/;
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63 | unless ($safe) {
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64 | print "<strong>$name is not a valid Unix filename -- sorry</strong>";
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65 | exit 0;
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66 | }
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67 | return $safe;
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68 | }
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