1: # The LearningOnline Network with CAPA
2: # Handler to retrieve an old version of a file
3: #
4: # (Publication Handler
5: #
6: # (TeX Content Handler
7: #
8: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
9: #
10: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
11: # 03/23 Guy Albertelli
12: # 03/24,03/29 Gerd Kortemeyer)
13: #
14: # 03/31,04/03 Gerd Kortemeyer
15:
16: package Apache::lonretrieve;
17:
18: use strict;
19: use Apache::File;
20: use File::Copy;
21: use Apache::Constants qw(:common :http :methods);
22:
23: sub phaseone {
24: my ($r,$fn,$uname,$udom)=@_;
25: my $docroot=$r->dir_config('lonDocRoot');
26:
27: my $urldir='/res/'.$udom.'/'.$uname.$fn;
28: $urldir=~s/\/[^\/]+$/\//;
29:
30: my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
31: my $resdir=$resfn;
32: $resdir=~s/\/[^\/]+$/\//;
33:
34: $fn=~/^\/(.+)\.(\w+)$/;
35: my $main=$1;
36: my $suffix=$2;
37:
38: $r->print('<form action=/adm/retrieve method=post>'.
39: '<input type=hidden name=filename value="'.$fn.'">'.
40: '<input type=hidden name=phase value=two>'.
41: '<table border=2><tr><th>Select</th><th>Version</th>'.
42: '<th>Became this version on ...</th>'.
43: '<th>Metadata</th></tr>');
44: my $filename;
45: opendir(DIR,$resdir);
46: while ($filename=readdir(DIR)) {
47: if ($filename=~/^$main\.(\d+)\.$suffix$/) {
48: my $version=$1;
49: my ($rdev,$rino,$rmode,$rnlink,
50: $ruid,$rgid,$rrdev,$rsize,
51: $ratime,$rmtime,$rctime,
52: $rblksize,$rblocks)=stat($resdir.'/'.$filename);
53: $r->print('<tr><td><input type=radio name=version value="'.
54: $version.'"></td><th>'.$version.'</th><td>'.
55: localtime($rmtime).'</td><td>'.
56: '<a href="'.$urldir.$filename.'.meta" target=cat>'.
57: 'Metadata Version '.$version.'</a></td></tr>');
58: }
59: }
60: closedir(DIR);
61: my ($rdev,$rino,$rmode,$rnlink,
62: $ruid,$rgid,$rrdev,$rsize,
63: $ratime,$rmtime,$rctime,
64: $rblksize,$rblocks)=stat($resfn);
65: $r->print('<tr><td><input type=radio name=version value="new"></td>'.
66: '<th>Current</th><td>'.localtime($rmtime).
67: '</td><td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
68: 'Metadata current version</a></td></tr></table><p>'.
69: '<font size=+1 color=red>Retrieval of an old version will '.
70: 'overwrite the file currently in construction space</font><p>'.
71: '<input type=submit value="Retrieve version"></form>');
72: }
73:
74: sub phasetwo {
75: my ($r,$fn,$uname,$udom)=@_;
76: if ($ENV{'form.version'}) {
77: my $version=$ENV{'form.version'};
78: if ($version eq 'new') {
79: $r->print('<h3>Retrieving current (most recent) version</h3>');
80: } else {
81: $r->print('<h3>Retrieving old version '.$version.'</h3>');
82: }
83: my $logfile;
84: my $ctarget='/home/'.$uname.'/public_html'.$fn;
85: my $vfn=$fn;
86: if ($version ne 'new') {
87: $vfn=~s/\.(\w+)$/\.$version\.$1/;
88: }
89: my $csource=$r->dir_config('lonDocRoot').'/res/'.$udom.'/'.$uname.$vfn;
90: unless ($logfile=Apache::File->new('>>'.$ctarget.'.log')) {
91: $r->print(
92: '<font color=red>No write permission to user directory, FAIL</font>');
93: }
94: print $logfile
95: "\n\n================= Retrieve ".localtime()." ================\n".
96: "Version: $version\nSource: $csource\nTarget: $ctarget\n";
97: $r->print('<p>Copying file: ');
98: if (copy($csource,$ctarget)) {
99: $r->print('ok<p>');
100: print $logfile "Copied sucessfully.\n\n";
101: } else {
102: my $error=$!;
103: $r->print('fail, '.$error.'<p>');
104: print $logfile "Copy failed: $error\n\n";
105: }
106: $r->print('<font size=+2><a href="/priv/'.$uname.$fn.
107: '">Back to '.$fn.'</a></font>');
108: } else {
109: $r->print(
110: '<font size=+1 color=red>Please pick a version to retrieve</font><p>');
111: &phaseone($r,$fn,$uname,$udom);
112: }
113: }
114:
115: sub handler {
116:
117: my $r=shift;
118:
119: my $fn;
120:
121: if ($ENV{'form.filename'}) {
122: $fn=$ENV{'form.filename'};
123: $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)//;
124: } else {
125: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
126: ' unspecified filename for retrieval', $r->filename);
127: return HTTP_NOT_FOUND;
128: }
129:
130: unless ($fn) {
131: $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
132: ' trying to retrieve non-existing file', $r->filename);
133: return HTTP_NOT_FOUND;
134: }
135:
136: # ----------------------------------------------------------- Start page output
137:
138: my $uname=$ENV{'user.name'};
139: my $udom=$ENV{'user.domain'};
140:
141: $r->content_type('text/html');
142: $r->send_http_header;
143:
144: $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
145:
146: $r->print(
147: '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
148:
149:
150: $r->print('<h1>Retrieve previous versions of <tt>'.$fn.'</tt></h1>');
151:
152: if ($ENV{'form.phase'} eq 'two') {
153: &phasetwo($r,$fn,$uname,$udom);
154: } else {
155: &phaseone($r,$fn,$uname,$udom);
156: }
157:
158: $r->print('</body></html>');
159: return OK;
160: }
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