File:
[LON-CAPA] /
loncom /
lontrans.pm
Revision
1.41:
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Fri Jun 2 01:20:28 2023 UTC (15 months, 3 weeks ago) by
raeburn
Branches:
MAIN
CVS tags:
version_2_12_X,
HEAD
- Bugs 6754 and 6907
- Return of grades to launcher CMS supported for resources or folders
accessed via LTI-mediated deep link.
- Support option: "Encrypt stored consumer secrets defined in domain"
- Signing of LTI payloads for roster retrieval, passback of grades,
and callback to logput launcher CMS session all now occur on
primary library server for course's domain.
1: # The LearningOnline Network
2: # URL translation for User Files
3: #
4: # $Id: lontrans.pm,v 1.41 2023/06/02 01:20:28 raeburn 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::lontrans;
30:
31: use strict;
32: use Apache::Constants qw(:common :remotehost);
33: use Apache::lonnet;
34: use Apache::loncommon;
35: use Apache::File();
36: use LONCAPA qw(:DEFAULT :match);
37:
38: sub handler {
39: my $r = shift;
40: # FIXME line remove when mod_perl fixes BUG#4948
41: $r->notes->set('error-notes' => '');
42: my $hdrhost = $r->headers_in->get('Host');
43: if (($r->uri eq '/adm/service/passback') ||
44: ($r->uri eq '/adm/service/roster')) {
45: return OK;
46: }
47: if ($r->uri=~m{^/raw/}) {
48: if ($hdrhost) {
49: unless ($hdrhost =~ /^internal\-/) {
50: my $remote_ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP,1);
51: my $lonhost = $r->dir_config('lonHostID');
52: if (&redirect_raw($remote_ip,$lonhost)) {
53: my $location = 'https://internal-'.$hdrhost.$r->uri;
54: $r->headers_out->set(Location => $location);
55: return REDIRECT;
56: }
57: }
58: }
59: }
60: my $alias = &Apache::lonnet::get_proxy_alias();
61: if ($alias) {
62: my $lonhost = $r->dir_config('lonHostID');
63: my $hostname = &Apache::lonnet::hostname($lonhost);
64: my $ssourl = '/adm/sso';
65: if ($r->dir_config('lonOtherAuthenUrl') ne '') {
66: $ssourl = $r->dir_config('lonOtherAuthenUrl');
67: }
68: if (($hdrhost eq $alias) || ($hdrhost eq $hostname)) {
69: my $proxyinfo = &Apache::lonnet::get_proxy_settings($r->dir_config('lonDefDomain'));
70: my ($vpnint,$vpnext);
71: if (ref($proxyinfo) eq 'HASH') {
72: $vpnint = $proxyinfo->{'vpnint'};
73: $vpnext = $proxyinfo->{'vpnext'};
74: }
75: my ($redirect,$remote_ip);
76: if ($hdrhost eq $alias) {
77: $remote_ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
78: if (($vpnext && &Apache::lonnet::ip_match($remote_ip,$vpnext)) &&
79: ($r->uri !~ m{^/adm/(lti|launch)/})) {
80: $redirect = $hostname;
81: }
82: if ($r->uri eq $ssourl) {
83: if (&Apache::lonnet::alias_sso($lonhost)) {
84: undef($redirect);
85: } else {
86: $redirect = $hostname;
87: }
88: }
89: if ($redirect eq $hdrhost) {
90: undef($redirect);
91: }
92: } elsif ($hdrhost eq $hostname) {
93: $remote_ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP,1);
94: unless (($remote_ip eq '127.0.0.1') || ($remote_ip eq '::1') ||
95: ($remote_ip eq &Apache::lonnet::get_host_ip($lonhost)) ||
96: ($r->uri=~m{^/adm/(lti|launch)/}) ||
97: ($vpnint && &Apache::lonnet::ip_match($remote_ip,$vpnint))) {
98: $redirect = $alias;
99: if (($r->uri=~m{^/raw/}) || ($r->uri=~m{^/adm/dns/})) {
100: my %iphost = &Apache::lonnet::get_iphost();
101: if (exists($iphost{$remote_ip})) {
102: undef($redirect);
103: }
104: } elsif ($r->uri eq $ssourl) {
105: unless (&Apache::lonnet::alias_sso($lonhost)) {
106: undef($redirect);
107: }
108: }
109: }
110: }
111: if ($redirect) {
112: my $uri = $r->uri;
113: if (($uri eq '/adm/switchserver') || ($uri =~ m{^/Shibboleth.sso/})) {
114: return DECLINED;
115: }
116: unless (($uri eq '/adm/migrateuser') || ($uri eq $ssourl)) {
117: my %user;
118: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
119: if (($handle) && ($user{'name'} ne '') && ($user{'domain'} ne '')) {
120: unless (($user{'name'} eq 'public') && ($user{'domain'} eq 'public')) {
121: my $dest = '/adm/migrateuser';
122: my $token = &set_token($r,$dest,$remote_ip,\%user);
123: unless ($token eq '') {
124: $r->internal_redirect("$dest?token=$token");
125: $r->set_handlers('PerlHandler'=> undef);
126: return DECLINED;
127: }
128: }
129: }
130: }
131: my $protocol = 'http';
132: my $port = $r->get_server_port();
133: if ($port eq '443') {
134: $protocol = 'https';
135: }
136: if ($uri =~ m{^(/adm/css/)(.+)(.css)$}) {
137: $uri = $1.&escape($2).$3;
138: }
139: my $location = $protocol.'://'.$redirect.$uri;
140: if ($r->uri =~ m{^/tiny/$match_domain/\w+$}) {
141: my $token = &set_token($r,$r->uri);
142: unless ($token eq '') {
143: $location .= '?ttoken='.$token;
144: }
145: } elsif ($r->args) {
146: $location .= '?'.$r->args;
147: }
148: $r->header_out(Location => $location);
149: return REDIRECT;
150: }
151: }
152: }
153: if ($r->uri =~ m{^/tiny/$match_domain/\w+$}) {
154: my $token = &set_token($r,$r->uri);
155: unless ($token eq '') {
156: $r->args('ttoken='.$token);
157: }
158: }
159: if ($r->uri=~m|^(/raw)?/uploaded/|) {
160: my $fn = $r->uri();
161: $fn=~s/^\/raw//;
162: my (undef,undef,$udom,$uname,@ufile)=split(/\//,$fn);
163: if (@ufile) { $ufile[-1]=~s/^[\~\.]+//; }
164: my $chome=&Apache::lonnet::homeserver($uname,$udom);
165: my $allowed=0;
166: my @ids=&Apache::lonnet::current_machine_ids();
167: foreach my $id (@ids) { if ($id eq $chome) { $allowed=1; } }
168: if ($allowed) {
169: $r->filename(&propath($udom,$uname).
170: '/userfiles/'.(join('/',@ufile)));
171: }
172: return OK;
173: } elsif ($r->uri =~ m{^\Q/adm/wrapper/ext/https:/\E[^/]}) {
174: my $uri = $r->uri;
175: $uri =~ s{^(\Q/adm/wrapper/ext/https:/\E)}{$1/};
176: $r->uri($uri);
177: }
178: return DECLINED;
179: }
180:
181: sub redirect_raw {
182: my ($remote_ip,$lonhost) = @_;
183: my @remhostids = &Apache::lonnet::get_hosts_from_ip($remote_ip);
184: my $redirect;
185: while (@remhostids) {
186: my $try_server = pop(@remhostids);
187: my $remhostname = &Apache::lonnet::hostname($try_server);
188: if ($remhostname) {
189: my $remoterev = &Apache::lonnet::get_server_loncaparev(undef,$try_server);
190: my ($remmajor,$remminor) = ($remoterev =~ /^(\d+)\.(\d+)/);
191: if (($remmajor > 2) || (($remmajor == 2) && $remminor >= 12)) {
192: my $internet_names = &Apache::lonnet::get_internet_names($try_server);
193: if (ref($internet_names) eq 'ARRAY') {
194: my $intdom = &Apache::lonnet::internet_dom($lonhost);
195: unless (grep(/^\Q$intdom\E$/,@{$internet_names})) {
196: my $lonhostname = &Apache::lonnet::hostname($lonhost);
197: my $serverhomeID = &Apache::lonnet::get_server_homeID($lonhostname);
198: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
199: my %domdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
200: my $replication = $domdefaults{'replication'};
201: if (ref($replication) eq 'HASH') {
202: my $remhomeID = &Apache::lonnet::get_server_homeID($remhostname);
203: my $remhomedom = &Apache::lonnet::host_domain($remhomeID);
204: my $remprimary = &Apache::lonnet::domain($remhomedom,'primary');
205: my $remintdom = &Apache::lonnet::internet_dom($remprimary);
206: if (ref($replication->{'certreq'}) eq 'ARRAY') {
207: if (grep(/^\Q$remintdom\E$/,@{$replication->{'certreq'}})) {
208: $redirect = 0;
209: } else {
210: $redirect = 1;
211: }
212: }
213: if (ref($replication->{'nocertreq'}) eq 'ARRAY') {
214: if (grep(/^\Q$remintdom\E$/,@{$replication->{'nocertreq'}})) {
215: $redirect = 1;
216: } else {
217: $redirect = 0;
218: }
219: }
220: }
221: }
222: }
223: }
224: last;
225: }
226: }
227: return $redirect;
228: }
229:
230: sub set_token {
231: my ($r,$dest,$remote_ip,$userref) = @_;
232: my (%info,%user);
233: if ($dest eq '/adm/migrateuser') {
234: return unless (ref($userref) eq 'HASH');
235: %user = %{$userref};
236: %info = ('ip' => $remote_ip,
237: 'domain' => $user{'domain'},
238: 'username' => $user{'name'},
239: 'server' => $r->dir_config('lonHostID'),
240: );
241: }
242: if ($r->args) {
243: foreach my $pair (split(/&/,$r->args)) {
244: my ($name,$value) = split(/=/,$pair);
245: $name = &LONCAPA::unescape($name);
246: next unless (($name eq 'role') || ($name eq 'symb') ||
247: ($name eq 'ltoken') || ($name eq 'linkkey') ||
248: ($name eq 'ttoken'));
249: $value =~ tr/+/ /;
250: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
251: $info{$name} = $value;
252: }
253: if ($info{'ttoken'}) {
254: my %current = &Apache::lonnet::tmpget($info{'ttoken'});
255: delete($info{'ttoken'});
256: if ($current{'origurl'} eq $r->uri) {
257: return if (keys(%current));
258: }
259: }
260: }
261: #
262: # To be able to support deep-linking for a shortened URL, i.e.,
263: # /tiny/$dom/$id with (a) linkkey included in POSTed data and
264: # data and (b) non-Shibboleth SSO in use, ltoken (or linkprot
265: # if sending to /adm/migrateuser), or linkkey are written to a
266: # .tmp file in /home/httpd/perl/tmp and the query string is
267: # replaced with ttoken=tokenid. This does mean other POSTed
268: # data will be discarded.
269: #
270: if ($r->uri =~ m{^/tiny/$match_domain/\w+$}) {
271: unless (($info{'ltoken'}) || ($info{'linkkey'} ne '')) {
272: &Apache::lonacc::get_posted_cgi($r,['linkkey']);
273: if ($env{'form.linkkey'} ne '') {
274: $info{'linkkey'} = $env{'form.linkkey'};
275: }
276: }
277: }
278: if ($dest eq '/adm/migrateuser') {
279: if ($info{'ltoken'}) {
280: my %link_info = &Apache::lonnet::tmpget($info{'ltoken'});
281: if ($link_info{'linkprot'}) {
282: $info{'linkprot'} = $link_info{'linkprot'};
283: foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') {
284: if ($link_info{$item} ne '') {
285: $info{$item} = $link_info{$item};
286: }
287: }
288: }
289: &Apache::lonnet::tmpdel($info{'ltoken'});
290: delete($info{'ltoken'});
291: }
292: unless ($info{'role'}) {
293: if ($user{'role'} ne '') {
294: $info{'role'} = $user{'role'};
295: }
296: }
297: unless ($info{'symb'}) {
298: unless ($r->uri eq '/adm/roles') {
299: $info{'origurl'} = $r->uri;
300: }
301: }
302: }
303: if (($dest eq '/adm/migrateuser') || (keys(%info) > 0)) {
304: unless ($dest eq '/adm/migrateuser') {
305: $info{'origurl'} = $r->uri;
306: }
307: my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
308: unless (($token eq 'con_lost') || ($token eq 'refused') ||
309: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
310: return $token;
311: }
312: }
313: return;
314: }
315:
316: 1;
317: __END__
318:
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