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Revision 1.3 by root, Wed Jun 4 11:58:36 2008 UTC vs.
Revision 1.18 by root, Fri Jun 6 16:23:57 2008 UTC

… …
3AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client 3AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use AnyEvent::HTTP; 7 use AnyEvent::HTTP;
8
9 http_get "http://www.nethype.de/", sub { print $_[1] };
10
11 # ... do something else here
8 12
9=head1 DESCRIPTION 13=head1 DESCRIPTION
10 14
11This module is an L<AnyEvent> user, you need to make sure that you use and 15This module is an L<AnyEvent> user, you need to make sure that you use and
12run a supported event loop. 16run a supported event loop.
17
18This module implements a simple, stateless and non-blocking HTTP
19client. It supports GET, POST and other request methods, cookies and more,
20all on a very low level. It can follow redirects supports proxies and
21automatically limits the number of connections to the values specified in
22the RFC.
23
24It should generally be a "good client" that is enough for most HTTP
25tasks. Simple tasks should be simple, but complex tasks should still be
26possible as the user retains control over request and response headers.
27
28The caller is responsible for authentication management, cookies (if
29the simplistic implementation in this module doesn't suffice), referer
30and other high-level protocol details for which this module offers only
31limited support.
13 32
14=head2 METHODS 33=head2 METHODS
15 34
16=over 4 35=over 4
17 36
… …
29use AnyEvent::Socket (); 48use AnyEvent::Socket ();
30use AnyEvent::Handle (); 49use AnyEvent::Handle ();
31 50
32use base Exporter::; 51use base Exporter::;
33 52
34our $VERSION = '1.0'; 53our $VERSION = '1.01';
35 54
36our @EXPORT = qw(http_get http_request); 55our @EXPORT = qw(http_get http_post http_head http_request);
37 56
38our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; 57our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)";
39our $MAX_RECURSE = 10; 58our $MAX_RECURSE = 10;
40our $MAX_PERSISTENT = 8; 59our $MAX_PERSISTENT = 8;
41our $PERSISTENT_TIMEOUT = 2; 60our $PERSISTENT_TIMEOUT = 2;
42our $TIMEOUT = 300; 61our $TIMEOUT = 300;
43 62
44# changing these is evil 63# changing these is evil
45our $MAX_PERSISTENT_PER_HOST = 2; 64our $MAX_PERSISTENT_PER_HOST = 2;
46our $MAX_PER_HOST = 4; # not respected yet :( 65our $MAX_PER_HOST = 4;
47 66
48our $PROXY; 67our $PROXY;
68our $ACTIVE = 0;
49 69
50my %KA_COUNT; # number of open keep-alive connections per host 70my %KA_COUNT; # number of open keep-alive connections per host
71my %CO_SLOT; # number of open connections, and wait queue, per host
51 72
52=item http_get $url, key => value..., $cb->($data, $headers) 73=item http_get $url, key => value..., $cb->($data, $headers)
53 74
54Executes an HTTP-GET request. See the http_request function for details on 75Executes an HTTP-GET request. See the http_request function for details on
55additional parameters. 76additional parameters.
56 77
78=item http_head $url, key => value..., $cb->($data, $headers)
79
80Executes an HTTP-HEAD request. See the http_request function for details on
81additional parameters.
82
57=item http_get $url, $body, key => value..., $cb->($data, $headers) 83=item http_post $url, $body, key => value..., $cb->($data, $headers)
58 84
59Executes an HTTP-POST request with a requets body of C<$bod>. See the 85Executes an HTTP-POST request with a request body of C<$bod>. See the
60http_request function for details on additional parameters. 86http_request function for details on additional parameters.
61 87
62=item http_request $method => $url, key => value..., $cb->($data, $headers) 88=item http_request $method => $url, key => value..., $cb->($data, $headers)
63 89
64Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL 90Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL
… …
66 92
67The callback will be called with the response data as first argument 93The callback will be called with the response data as first argument
68(or C<undef> if it wasn't available due to errors), and a hash-ref with 94(or C<undef> if it wasn't available due to errors), and a hash-ref with
69response headers as second argument. 95response headers as second argument.
70 96
71All the headers in that has are lowercased. In addition to the response 97All the headers in that hash are lowercased. In addition to the response
72headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and 98headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and
73C<Reason> contain the three parts of the HTTP Status-Line of the same 99C<Reason> contain the three parts of the HTTP Status-Line of the same
74name. 100name. If the server sends a header multiple lines, then their contents
101will be joined together with C<\x00>.
75 102
76If an internal error occurs, such as not being able to resolve a hostname, 103If an internal error occurs, such as not being able to resolve a hostname,
77then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> 104then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599>
78and the C<Reason> pseudo-header will contain an error message. 105and the C<Reason> pseudo-header will contain an error message.
79 106
107A typical callback might look like this:
108
109 sub {
110 my ($body, $hdr) = @_;
111
112 if ($hdr->{Status} =~ /^2/) {
113 ... everything should be ok
114 } else {
115 print "error, $hdr->{Status} $hdr->{Reason}\n";
116 }
117 }
118
80Additional parameters are key-value pairs, and are fully optional. They 119Additional parameters are key-value pairs, and are fully optional. They
81include: 120include:
82 121
83=over 4 122=over 4
84 123
… …
87Whether to recurse requests or not, e.g. on redirects, authentication 126Whether to recurse requests or not, e.g. on redirects, authentication
88retries and so on, and how often to do so. 127retries and so on, and how often to do so.
89 128
90=item headers => hashref 129=item headers => hashref
91 130
92The request headers to use. 131The request headers to use. Currently, C<http_request> may provide its
132own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
133and will provide defaults for C<User-Agent:> and C<Referer:>.
93 134
94=item timeout => $seconds 135=item timeout => $seconds
95 136
96The time-out to use for various stages - each connect attempt will reset 137The time-out to use for various stages - each connect attempt will reset
97the timeout, as will read or write activity. Default timeout is 5 minutes. 138the timeout, as will read or write activity. Default timeout is 5 minutes.
… …
107=item body => $string 148=item body => $string
108 149
109The request body, usually empty. Will be-sent as-is (future versions of 150The request body, usually empty. Will be-sent as-is (future versions of
110this module might offer more options). 151this module might offer more options).
111 152
153=item cookie_jar => $hash_ref
154
155Passing this parameter enables (simplified) cookie-processing, loosely
156based on the original netscape specification.
157
158The C<$hash_ref> must be an (initially empty) hash reference which will
159get updated automatically. It is possible to save the cookie_jar to
160persistent storage with something like JSON or Storable, but this is not
161recommended, as expire times are currently being ignored.
162
163Note that this cookie implementation is not of very high quality, nor
164meant to be complete. If you want complete cookie management you have to
165do that on your own. C<cookie_jar> is meant as a quick fix to get some
166cookie-using sites working. Cookies are a privacy disaster, do not use
167them unless required to.
168
112=back 169=back
113 170
114=back 171Example: make a simple HTTP GET request for http://www.nethype.de/
172
173 http_request GET => "http://www.nethype.de/", sub {
174 my ($body, $hdr) = @_;
175 print "$body\n";
176 };
177
178Example: make a HTTP HEAD request on https://www.google.com/, use a
179timeout of 30 seconds.
180
181 http_request
182 GET => "https://www.google.com",
183 timeout => 30,
184 sub {
185 my ($body, $hdr) = @_;
186 use Data::Dumper;
187 print Dumper $hdr;
188 }
189 ;
115 190
116=cut 191=cut
117 192
193sub _slot_schedule;
194sub _slot_schedule($) {
195 my $host = shift;
196
197 while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) {
198 if (my $cb = shift @{ $CO_SLOT{$host}[1] }) {
199 # somebody wants that slot
200 ++$CO_SLOT{$host}[0];
201 ++$ACTIVE;
202
203 $cb->(AnyEvent::Util::guard {
204 --$ACTIVE;
205 --$CO_SLOT{$host}[0];
206 _slot_schedule $host;
207 });
208 } else {
209 # nobody wants the slot, maybe we can forget about it
210 delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0];
211 last;
212 }
213 }
214}
215
216# wait for a free slot on host, call callback
217sub _get_slot($$) {
218 push @{ $CO_SLOT{$_[0]}[1] }, $_[1];
219
220 _slot_schedule $_[0];
221}
222
118sub http_request($$$;@) { 223sub http_request($$@) {
119 my $cb = pop; 224 my $cb = pop;
120 my ($method, $url, %arg) = @_; 225 my ($method, $url, %arg) = @_;
121 226
122 my %hdr; 227 my %hdr;
123 228
124 $method = uc $method; 229 $method = uc $method;
125 230
126 if (my $hdr = delete $arg{headers}) { 231 if (my $hdr = $arg{headers}) {
127 while (my ($k, $v) = each %$hdr) { 232 while (my ($k, $v) = each %$hdr) {
128 $hdr{lc $k} = $v; 233 $hdr{lc $k} = $v;
129 } 234 }
130 } 235 }
131 236
237 my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
238
239 return $cb->(undef, { Status => 599, Reason => "recursion limit reached" })
240 if $recurse < 0;
241
132 my $proxy = $arg{proxy} || $PROXY; 242 my $proxy = $arg{proxy} || $PROXY;
133 my $timeout = $arg{timeout} || $TIMEOUT; 243 my $timeout = $arg{timeout} || $TIMEOUT;
134 my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE;
135 244
136 $hdr{"user-agent"} ||= $USERAGENT; 245 $hdr{"user-agent"} ||= $USERAGENT;
137 246
138 my ($host, $port, $path, $scheme); 247 my ($scheme, $authority, $upath, $query, $fragment) =
248 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
249
250 $scheme = lc $scheme;
251
252 my $uport = $scheme eq "http" ? 80
253 : $scheme eq "https" ? 443
254 : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" });
255
256 $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic
257
258 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
259 or return $cb->(undef, { Status => 599, Reason => "unparsable URL" });
260
261 my $uhost = $1;
262 $uport = $2 if defined $2;
263
264 $uhost =~ s/^\[(.*)\]$/$1/;
265 $upath .= "?$query" if length $query;
266
267 $upath =~ s%^/?%/%;
268
269 # cookie processing
270 if (my $jar = $arg{cookie_jar}) {
271 %$jar = () if $jar->{version} < 1;
272
273 my @cookie;
274
275 while (my ($chost, $v) = each %$jar) {
276 next unless $chost eq substr $uhost, -length $chost;
277 next unless $chost =~ /^\./;
278
279 while (my ($cpath, $v) = each %$v) {
280 next unless $cpath eq substr $upath, 0, length $cpath;
281
282 while (my ($k, $v) = each %$v) {
283 next if $scheme ne "https" && exists $v->{secure};
284 push @cookie, "$k=$v->{value}";
285 }
286 }
287 }
288
289 $hdr{cookie} = join "; ", @cookie
290 if @cookie;
291 }
292
293 my ($rhost, $rport, $rpath); # request host, port, path
139 294
140 if ($proxy) { 295 if ($proxy) {
141 ($host, $port, $scheme) = @$proxy; 296 ($rhost, $rport, $scheme) = @$proxy;
142 $path = $url; 297 $rpath = $url;
143 } else { 298 } else {
144 ($scheme, my $authority, $path, my $query, my $fragment) = 299 ($rhost, $rport, $rpath) = ($uhost, $uport, $upath);
145 $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
146
147 $port = $scheme eq "http" ? 80
148 : $scheme eq "https" ? 443
149 : croak "$url: only http and https URLs supported";
150
151 $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x
152 or croak "$authority: unparsable URL";
153
154 $host = $1;
155 $port = $2 if defined $2;
156
157 $host =~ s/^\[(.*)\]$/$1/;
158 $path .= "?$query" if length $query;
159
160 $path = "/" unless $path;
161
162 $hdr{host} = $host = lc $host; 300 $hdr{host} = $uhost;
163 } 301 }
164 302
165 $scheme = lc $scheme;
166
167 my %state;
168
169 $state{body} = delete $arg{body};
170
171 $hdr{"content-length"} = length $state{body}; 303 $hdr{"content-length"} = length $arg{body};
172 304
305 my %state = (connect_guard => 1);
306
307 _get_slot $uhost, sub {
308 $state{slot_guard} = shift;
309
310 return unless $state{connect_guard};
311
173 $state{connect_guard} = AnyEvent::Socket::tcp_connect $host, $port, sub { 312 $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub {
174 $state{fh} = shift 313 $state{fh} = shift
175 or return $cb->(undef, { Status => 599, Reason => "$!" }); 314 or return $cb->(undef, { Status => 599, Reason => "$!" });
176 315
177 delete $state{connect_guard}; # reduce memory usage, save a tree 316 delete $state{connect_guard}; # reduce memory usage, save a tree
178 317
179 # get handle 318 # get handle
180 $state{handle} = new AnyEvent::Handle 319 $state{handle} = new AnyEvent::Handle
181 fh => $state{fh}, 320 fh => $state{fh},
182 ($scheme eq "https" ? (tls => "connect") : ()); 321 ($scheme eq "https" ? (tls => "connect") : ());
183 322
184 # limit the number of persistent connections 323 # limit the number of persistent connections
185 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { 324 if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) {
186 ++$KA_COUNT{$_[1]}; 325 ++$KA_COUNT{$_[1]};
187 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; 326 $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} };
188 $hdr{connection} = "keep-alive"; 327 $hdr{connection} = "keep-alive";
189 delete $hdr{connection}; # keep-alive not yet supported 328 delete $hdr{connection}; # keep-alive not yet supported
190 } else { 329 } else {
191 delete $hdr{connection}; 330 delete $hdr{connection};
192 } 331 }
193 332
194 # (re-)configure handle 333 # (re-)configure handle
195 $state{handle}->timeout ($timeout); 334 $state{handle}->timeout ($timeout);
196 $state{handle}->on_error (sub { 335 $state{handle}->on_error (sub {
336 my $errno = "$!";
197 %state = (); 337 %state = ();
198 $cb->(undef, { Status => 599, Reason => "$!" }); 338 $cb->(undef, { Status => 599, Reason => $errno });
199 }); 339 });
200 $state{handle}->on_eof (sub { 340 $state{handle}->on_eof (sub {
201 %state = (); 341 %state = ();
202 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); 342 $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" });
203 }); 343 });
204 344
205 # send request 345 # send request
206 $state{handle}->push_write ( 346 $state{handle}->push_write (
207 "$method $path HTTP/1.0\015\012" 347 "$method $rpath HTTP/1.0\015\012"
208 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) 348 . (join "", map "$_: $hdr{$_}\015\012", keys %hdr)
209 . "\015\012" 349 . "\015\012"
210 . (delete $state{body}) 350 . (delete $arg{body})
211 );
212
213 %hdr = (); # reduce memory usage, save a kitten
214
215 # status line
216 $state{handle}->push_read (line => qr/\015?\012/, sub {
217 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
218 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
219
220 my %hdr = ( # response headers
221 HTTPVersion => ",$1",
222 Status => ",$2",
223 Reason => ",$3",
224 ); 351 );
225 352
353 %hdr = (); # reduce memory usage, save a kitten
354
355 # status line
356 $state{handle}->push_read (line => qr/\015?\012/, sub {
357 $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix
358 or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" }));
359
360 my %hdr = ( # response headers
361 HTTPVersion => "\x00$1",
362 Status => "\x00$2",
363 Reason => "\x00$3",
364 );
365
226 # headers, could be optimized a bit 366 # headers, could be optimized a bit
227 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { 367 $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub {
228 for ("$_[1]\012") { 368 for ("$_[1]\012") {
229 # we support spaces in field names, as lotus domino 369 # we support spaces in field names, as lotus domino
230 # creates them. 370 # creates them.
231 $hdr{lc $1} .= ",$2" 371 $hdr{lc $1} .= "\x00$2"
232 while /\G 372 while /\G
233 ([^:\000-\037]+): 373 ([^:\000-\037]+):
234 [\011\040]* 374 [\011\040]*
235 ((?: [^\015\012]+ | \015?\012[\011\040] )*) 375 ((?: [^\015\012]+ | \015?\012[\011\040] )*)
236 \015?\012 376 \015?\012
237 /gxc; 377 /gxc;
238 378
239 /\G$/ 379 /\G$/
240 or return $cb->(undef, { Status => 599, Reason => "garbled response headers" }); 380 or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" }));
241 } 381 }
242 382
243 substr $_, 0, 1, "" 383 substr $_, 0, 1, ""
244 for values %hdr; 384 for values %hdr;
245 385
246 if ($method ne "HEAD") { 386 my $finish = sub {
247 if (exists $hdr{"content-length"}) { 387 %state = ();
248 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { 388
249 # could cache persistent connection now 389 # set-cookie processing
250 if ($hdr{connection} =~ /\bkeep-alive\b/i) { 390 if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) {
251 # but we don't, due to misdesigns, this is annoyingly complex 391 for (split /\x00/, $hdr{"set-cookie"}) {
392 my ($cookie, @arg) = split /;\s*/;
393 my ($name, $value) = split /=/, $cookie, 2;
394 my %kv = (value => $value, map { split /=/, $_, 2 } @arg);
395
396 my $cdom = (delete $kv{domain}) || $uhost;
397 my $cpath = (delete $kv{path}) || "/";
398
399 $cdom =~ s/^.?/./; # make sure it starts with a "."
400
401 next if $cdom =~ /\.$/;
402
403 # this is not rfc-like and not netscape-like. go figure.
404 my $ndots = $cdom =~ y/.//;
405 next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2);
406
407 # store it
408 $arg{cookie_jar}{version} = 1;
409 $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv;
252 }; 410 }
253
254 %state = ();
255 $cb->($_[1], \%hdr);
256 }); 411 }
412
413 if ($_[1]{Status} =~ /^30[12]$/ && $recurse) {
414 # microsoft and other assholes don't give a shit for following standards,
415 # try to support a common form of broken Location header.
416 $_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%;
417
418 http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb);
419 } else {
420 $cb->($_[0], $_[1]);
421 }
422 };
423
424 if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") {
425 $finish->(undef, \%hdr);
257 } else { 426 } else {
427 if (exists $hdr{"content-length"}) {
428 $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub {
429 # could cache persistent connection now
430 if ($hdr{connection} =~ /\bkeep-alive\b/i) {
431 # but we don't, due to misdesigns, this is annoyingly complex
432 };
433
434 $finish->($_[1], \%hdr);
435 });
436 } else {
258 # too bad, need to read until we get an error or EOF, 437 # too bad, need to read until we get an error or EOF,
259 # no way to detect winged data. 438 # no way to detect winged data.
260 $_[0]->on_error (sub { 439 $_[0]->on_error (sub {
261 %state = ();
262 $cb->($_[0]{rbuf}, \%hdr); 440 $finish->($_[0]{rbuf}, \%hdr);
263 }); 441 });
264 $_[0]->on_eof (undef); 442 $_[0]->on_eof (undef);
265 $_[0]->on_read (sub { }); 443 $_[0]->on_read (sub { });
444 }
266 } 445 }
267 } 446 });
268 }); 447 });
448 }, sub {
449 $timeout
269 }); 450 };
270 }, sub {
271 $timeout
272 }; 451 };
273 452
274 defined wantarray && AnyEvent::Util::guard { %state = () } 453 defined wantarray && AnyEvent::Util::guard { %state = () }
275} 454}
276 455
277sub http_get($$;@) { 456sub http_get($@) {
278 unshift @_, "GET"; 457 unshift @_, "GET";
279 &http_request 458 &http_request
280} 459}
281 460
461sub http_head($@) {
462 unshift @_, "HEAD";
463 &http_request
464}
465
282sub http_post($$$;@) { 466sub http_post($$@) {
283 unshift @_, "POST", "body"; 467 unshift @_, "POST", "body";
284 &http_request 468 &http_request
285} 469}
286 470
471=back
472
287=head2 GLOBAL FUNCTIONS AND VARIABLES 473=head2 GLOBAL FUNCTIONS AND VARIABLES
288 474
289=over 4 475=over 4
290 476
291=item AnyEvent::HTTP::set_proxy "proxy-url" 477=item AnyEvent::HTTP::set_proxy "proxy-url"
… …
312 498
313The maximum time to cache a persistent connection, in seconds (default: 2). 499The maximum time to cache a persistent connection, in seconds (default: 2).
314 500
315Not implemented currently. 501Not implemented currently.
316 502
503=item $AnyEvent::HTTP::ACTIVE
504
505The number of active connections. This is not the number of currently
506running requests, but the number of currently open and non-idle TCP
507connections. This number of can be useful for load-leveling.
508
317=back 509=back
318 510
319=cut 511=cut
320 512
321sub set_proxy($) { 513sub set_proxy($) {
… …
329 521
330L<AnyEvent>. 522L<AnyEvent>.
331 523
332=head1 AUTHOR 524=head1 AUTHOR
333 525
334 Marc Lehmann <schmorp@schmorp.de> 526 Marc Lehmann <schmorp@schmorp.de>
335 http://home.schmorp.de/ 527 http://home.schmorp.de/
336 528
337=cut 529=cut
338 530
3391 5311
340 532

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