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Comparing Coro/myhttpd/httpd.pl (file contents):
Revision 1.28 by root, Mon Aug 20 16:58:19 2001 UTC vs.
Revision 1.38 by root, Sun Sep 2 02:27:51 2001 UTC

1use Coro; 1use Coro;
2use Coro::Semaphore; 2use Coro::Semaphore;
3use Coro::Event; 3use Coro::Event;
4use Coro::Socket; 4use Coro::Socket;
5
6use HTTP::Date;
5 7
6no utf8; 8no utf8;
7use bytes; 9use bytes;
8 10
9# at least on my machine, this thingy serves files 11# at least on my machine, this thingy serves files
… …
25 my $level = shift; 27 my $level = shift;
26 my $format = shift; 28 my $format = shift;
27 printf "---: $format\n", @_; 29 printf "---: $format\n", @_;
28} 30}
29 31
30my $connections = new Coro::Semaphore $MAX_CONNECTS; 32our $connections = new Coro::Semaphore $MAX_CONNECTS || 250;
33
34our $wait_factor = 0.95;
35
36our @transfers = (
37 [(new Coro::Semaphore $MAX_TRANSFERS_SMALL || 50), 1],
38 [(new Coro::Semaphore $MAX_TRANSFERS_LARGE || 50), 1],
39);
31 40
32my @newcons; 41my @newcons;
33my @pool; 42my @pool;
34 43
35# one "execution thread" 44# one "execution thread"
36sub handler { 45sub handler {
37 while () { 46 while () {
38 my $new = pop @newcons;
39 if ($new) { 47 if (@newcons) {
40 eval { 48 eval {
41 conn->new(@$new)->handle; 49 conn->new(@{pop @newcons})->handle;
42 }; 50 };
43 slog 1, "$@" if $@ && !ref $@; 51 slog 1, "$@" if $@ && !ref $@;
44 $connections->up; 52 $connections->up;
45 } else { 53 } else {
46 last if @pool >= $MAX_POOL; 54 last if @pool >= $MAX_POOL;
… …
57 Listen => 50, 65 Listen => 50,
58 or die "unable to start server"; 66 or die "unable to start server";
59 67
60push @listen_sockets, $http_port; 68push @listen_sockets, $http_port;
61 69
70our $NOW;
71our $HTTP_NOW;
72
73Event->timer(interval => 1, hard => 1, cb => sub {
74 $NOW = time;
75 $HTTP_NOW = time2str $NOW;
76})->now;
77
62# the "main thread" 78# the "main thread"
63async { 79async {
64 slog 1, "accepting connections"; 80 slog 1, "accepting connections";
65 while () { 81 while () {
66 $connections->down; 82 $connections->down;
67 push @newcons, [$http_port->accept]; 83 push @newcons, [$http_port->accept];
68 #slog 3, "accepted @$connections ".scalar(@pool); 84 #slog 3, "accepted @$connections ".scalar(@pool);
69 $::NOW = time;
70 if (@pool) { 85 if (@pool) {
71 (pop @pool)->ready; 86 (pop @pool)->ready;
72 } else { 87 } else {
73 async \&handler; 88 async \&handler;
74 } 89 }
… …
118 or $self->err(500, "unable to decode peername"); 133 or $self->err(500, "unable to decode peername");
119 134
120 $self->{remote_addr} = inet_ntoa $iaddr; 135 $self->{remote_addr} = inet_ntoa $iaddr;
121 $self->{time} = $::NOW; 136 $self->{time} = $::NOW;
122 137
123 # enter ourselves into various lists
124 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
125
126 $::conns++; 138 $::conns++;
127 139
128 $self; 140 $self;
129} 141}
130 142
… …
132 my $self = shift; 144 my $self = shift;
133 145
134 $::conns--; 146 $::conns--;
135 147
136 $self->eoconn; 148 $self->eoconn;
137 delete $conn{$self->{remote_addr}}{$self*1};
138} 149}
139 150
140# end of connection 151# end of connection
141sub eoconn { 152sub eoconn {
142 my $self = shift; 153 my $self = shift;
154
155 # clean up hints
156 delete $conn{$self->{remote_id}}{$self*1};
143 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 157 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
144} 158}
145 159
146sub slog { 160sub slog {
147 my $self = shift; 161 my $self = shift;
148 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 162 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
149} 163}
150 164
151sub response { 165sub response {
152 my ($self, $code, $msg, $hdr, $content) = @_; 166 my ($self, $code, $msg, $hdr, $content) = @_;
153 my $res = "HTTP/1.1 $code $msg\015\012"; 167 my $res = "HTTP/1.1 $code $msg\015\012";
154 168
155 $self->{h}{connection} ||= $hdr->{Connection}; 169 $self->{h}{connection} ||= $hdr->{Connection};
156 170
157 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 171 $res .= "Date: $HTTP_NOW\015\012";
158 172
159 while (my ($h, $v) = each %$hdr) { 173 while (my ($h, $v) = each %$hdr) {
160 $res .= "$h: $v\015\012" 174 $res .= "$h: $v\015\012"
161 } 175 }
162 $res .= "\015\012"; 176 $res .= "\015\012";
… …
175sub err { 189sub err {
176 my $self = shift; 190 my $self = shift;
177 my ($code, $msg, $hdr, $content) = @_; 191 my ($code, $msg, $hdr, $content) = @_;
178 192
179 unless (defined $content) { 193 unless (defined $content) {
180 $content = "$code $msg"; 194 $content = "$code $msg\n";
181 $hdr->{"Content-Type"} = "text/plain"; 195 $hdr->{"Content-Type"} = "text/plain";
182 $hdr->{"Content-Length"} = length $content; 196 $hdr->{"Content-Length"} = length $content;
183 } 197 }
184 $hdr->{"Connection"} = "close"; 198 $hdr->{"Connection"} = "close";
185 199
186 $self->response($code, $msg, $hdr, $content); 200 $self->response($code, $msg, $hdr, $content);
187 201
188 die bless {}, err::; 202 die bless {}, err::;
189} 203}
190 204
191sub err_blocked {
192 my $self = shift;
193 my $ip = $self->{remote_addr};
194 my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
195
196 Coro::Event::do_timer(after => 20*rand);
197
198 $self->err(401, "too many connections",
199 {
200 "Content-Type" => "text/html",
201 "Retry-After" => $::BLOCKTIME,
202 "Warning" => "Please do NOT retry, you have been blocked",
203 "WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
204 "Connection" => "close",
205 },
206 <<EOF);
207<html>
208<head>
209<title>Too many connections</title>
210</head>
211<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
212
213<p>You have been blocked because you opened too many connections. You
214may retry at</p>
215
216 <p><blockquote>$time.</blockquote></p>
217
218<p>Until then, each new access will renew the block. You might want to have a
219look at the <a href="http://www.goof.com/pcg/marc/animefaq.html#connectionlimit">FAQ</a>.</p>
220
221</body></html>
222EOF
223}
224
225sub handle { 205sub handle {
226 my $self = shift; 206 my $self = shift;
227 my $fh = $self->{fh}; 207 my $fh = $self->{fh};
208
209 my $host;
228 210
229 $fh->timeout($::REQ_TIMEOUT); 211 $fh->timeout($::REQ_TIMEOUT);
230 while() { 212 while() {
231 $self->{reqs}++; 213 $self->{reqs}++;
232 214
… …
242 } 224 }
243 225
244 $self->{h} = {}; 226 $self->{h} = {};
245 227
246 $fh->timeout($::RES_TIMEOUT); 228 $fh->timeout($::RES_TIMEOUT);
247 my $ip = $self->{remote_addr};
248
249 if ($blocked{$ip}) {
250 $self->err_blocked($blocked{$ip})
251 if $blocked{$ip} > $::NOW;
252
253 delete $blocked{$ip};
254 }
255
256 if (%{$conn{$ip}} > $::MAX_CONN_IP) {
257 $self->slog(2, "blocked ip $ip");
258 $self->err_blocked;
259 }
260 229
261 $req =~ /^(?:\015\012)? 230 $req =~ /^(?:\015\012)?
262 (GET|HEAD) \040+ 231 (GET|HEAD) \040+
263 ([^\040]+) \040+ 232 ([^\040]+) \040+
264 HTTP\/([0-9]+\.[0-9]+) 233 HTTP\/([0-9]+\.[0-9]+)
… …
289 258
290 $self->{h}{$h} = substr $v, 1 259 $self->{h}{$h} = substr $v, 1
291 while ($h, $v) = each %hdr; 260 while ($h, $v) = each %hdr;
292 } 261 }
293 262
263 # remote id should be unique per user
264 my $id = $self->{remote_addr};
265
266 if (exists $self->{h}{"client-ip"}) {
267 $id .= "[".$self->{h}{"client-ip"}."]";
268 } elsif (exists $self->{h}{"x-forwarded-for"}) {
269 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
270 }
271
272 $self->{remote_id} = $id;
273
274 if ($blocked{$id}) {
275 $self->err_blocked($blocked{$id})
276 if $blocked{$id} > $::NOW;
277
278 delete $blocked{$id};
279 }
280
281 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
282 my $delay = $::PER_TIMEOUT + 15;
283 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
284 if ($delay <= 0) {
285 $self->slog(2, "blocked ip $id");
286 $self->err_blocked;
287 } else {
288 Coro::Event::do_timer(after => 4); $delay -= 4;
289 }
290 }
291 }
292
293 # find out server name and port
294 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
295 $host = $1;
296 } else {
297 $host = $self->{h}{host};
298 }
299
300 if (defined $host) {
294 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 301 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
302 } else {
303 ($self->{server_port}, $host)
304 = unpack_sockaddr_in $self->{fh}->getsockname
305 or $self->err(500, "unable to get socket name");
306 $host = inet_ntoa $host;
307 }
295 308
309 $self->{server_name} = $host;
310
311 # enter ourselves into various lists
312 weaken ($conn{$id}{$self*1} = $self);
296 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 313 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
297 314
298 eval { 315 eval {
299 $self->map_uri; 316 $self->map_uri;
300 $self->respond; 317 $self->respond;
301 }; 318 };
302 319
303 $self->eoconn; 320 $self->eoconn;
304 321
305 die if $@ && !ref $@; 322 die if $@ && !ref $@;
306 323
307 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 324 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
308 325
309 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
310 $fh->timeout($::PER_TIMEOUT); 326 $fh->timeout($::PER_TIMEOUT);
311 } 327 }
312} 328}
313 329
314# uri => path mapping 330# uri => path mapping
315sub map_uri { 331sub map_uri {
316 my $self = shift; 332 my $self = shift;
317 my $host = $self->{h}{host} || "default"; 333 my $host = $self->{server_name};
318 my $uri = $self->{uri}; 334 my $uri = $self->{uri};
319 335
320 # some massaging, also makes it more secure 336 # some massaging, also makes it more secure
321 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 337 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
322 $uri =~ s%//+%/%g; 338 $uri =~ s%//+%/%g;
… …
332 $self->{path} = "$::DOCROOT/$host$uri"; 348 $self->{path} = "$::DOCROOT/$host$uri";
333 349
334 $self->access_check; 350 $self->access_check;
335} 351}
336 352
337sub server_address {
338 my $self = shift;
339 my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
340 or $self->err(500, "unable to get socket name");
341 ((inet_ntoa $iaddr), $port);
342}
343
344sub server_host {
345 my $self = shift;
346 if (exists $self->{h}{host}) {
347 return $self->{h}{host};
348 } else {
349 return (($self->server_address)[0]);
350 }
351}
352
353sub server_hostport {
354 my $self = shift;
355 my ($host, $port);
356 if (exists $self->{h}{host}) {
357 ($host, $port) = ($self->{h}{host}, $self->{server_port});
358 } else {
359 ($host, $port) = $self->server_address;
360 }
361 $port = $port == 80 ? "" : ":$port";
362 $host.$port;
363}
364
365sub _cgi { 353sub _cgi {
366 my $self = shift; 354 my $self = shift;
367 my $path = shift; 355 my $path = shift;
368 my $fh; 356 my $fh;
369 357
370 # no two-way xxx supported 358 # no two-way xxx supported
371 if (0 == fork) { 359 if (0 == fork) {
372 open STDOUT, ">&".fileno($self->{fh}); 360 open STDOUT, ">&".fileno($self->{fh});
373 if (chdir $::DOCROOT) { 361 if (chdir $::DOCROOT) {
374 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 362 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
375 $ENV{HTTP_HOST} = $self->server_host; 363 $ENV{HTTP_HOST} = $self->{server_name};
376 $ENV{HTTP_PORT} = $self->{server_host}; 364 $ENV{HTTP_PORT} = $self->{server_port};
377 $ENV{SCRIPT_NAME} = $self->{name}; 365 $ENV{SCRIPT_NAME} = $self->{name};
378 exec $path; 366 exec $path;
379 } 367 }
380 Coro::State::_exit(0); 368 Coro::State::_exit(0);
381 } else { 369 } else {
370 die;
382 } 371 }
372}
373
374sub server_hostport {
375 $_[0]{server_port} == 80
376 ? $_[0]{server_name}
377 : "$_[0]{server_name}:$_[0]{server_port}";
383} 378}
384 379
385sub respond { 380sub respond {
386 my $self = shift; 381 my $self = shift;
387 my $path = $self->{path}; 382 my $path = $self->{path};
… …
397 392
398 if (-d _ && -r _) { 393 if (-d _ && -r _) {
399 # directory 394 # directory
400 if ($path !~ /\/$/) { 395 if ($path !~ /\/$/) {
401 # create a redirect to get the trailing "/" 396 # create a redirect to get the trailing "/"
402 my $host = $self->server_hostport; 397 # we don't try to avoid the :80
403 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 398 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
404 } else { 399 } else {
405 $ims < $self->{stat}[9] 400 $ims < $self->{stat}[9]
406 or $self->err(304, "not modified"); 401 or $self->err(304, "not modified");
407 402
408 if (-r "$path/index.html") { 403 if (-r "$path/index.html") {
… …
432 $idx); 427 $idx);
433} 428}
434 429
435sub handle_file { 430sub handle_file {
436 my $self = shift; 431 my $self = shift;
437 my $length = -s _; 432 my $length = $self->{stat}[7];
433 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
438 my $hdr = { 434 my $hdr = {
439 "Last-Modified" => time2str ((stat _)[9]), 435 "Last-Modified" => time2str ((stat _)[9]),
440 }; 436 };
441 437
442 my @code = (200, "ok"); 438 my @code = (200, "ok");
… …
454 } 450 }
455 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 451 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
456 } 452 }
457 $hdr->{"Content-Range"} = "bytes */$length"; 453 $hdr->{"Content-Range"} = "bytes */$length";
458 $hdr->{"Content-Length"} = $length; 454 $hdr->{"Content-Length"} = $length;
459 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
460 $self->err(416, "not satisfiable", $hdr, ""); 455 $self->err(416, "not satisfiable", $hdr, "");
461 456
462satisfiable: 457satisfiable:
463 # check for segmented downloads 458 # check for segmented downloads
464 if ($l && $::NO_SEGMENTED) { 459 if ($l && $::NO_SEGMENTED) {
460 my $delay = $::PER_TIMEOUT + 15;
465 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 461 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
466 $self->err(400, "segmented downloads are not allowed", 462 if ($delay <= 0) {
467 { "Content-Type" => "text/html", Connection => "close" }, <<EOF); 463 $self->err_segmented_download;
468<html> 464 } else {
469<head> 465 Coro::Event::do_timer(after => 4); $delay -= 4;
470<title>Segmented downloads are not allowed</title> 466 }
471</head>
472<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
473
474<p>Segmented downloads are not allowed on this server. Please refer to the
475<a href="http://www.goof.com/pcg/marc/animefaq.html#segmented_downloads">FAQ</a>.</p>
476
477</body></html>
478EOF
479EOF
480 } 467 }
481 } 468 }
482 469
483 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 470 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
484 @code = (206, "partial content"); 471 @code = (206, "partial content");
… …
494 $hdr->{"Content-Length"} = $length; 481 $hdr->{"Content-Length"} = $length;
495 482
496 $self->response(@code, $hdr, ""); 483 $self->response(@code, $hdr, "");
497 484
498 if ($self->{method} eq "GET") { 485 if ($self->{method} eq "GET") {
486 $self->{time} = $::NOW;
487
488 my $fudge = $queue->[0]->waiters;
489 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
490
491 $queue->[1] *= $fudge;
492 my $transfer = $queue->[0]->guard;
493
494 if ($fudge != 1) {
495 $queue->[1] /= $fudge;
496 $queue->[1] = $queue->[1] * $::wait_factor
497 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
498 }
499 $self->{time} = $::NOW;
500
501 $self->{fh}->writable or return;
502
499 my ($fh, $buf, $r); 503 my ($fh, $buf, $r);
500 my $current = $Coro::current; 504 my $current = $Coro::current;
501 open $fh, "<", $self->{path} 505 open $fh, "<", $self->{path}
502 or die "$self->{path}: late open failure ($!)"; 506 or die "$self->{path}: late open failure ($!)";
503 507
… …
515 or last; 519 or last;
516 } else { 520 } else {
517 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 521 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
518 $buf, 0, sub { 522 $buf, 0, sub {
519 $r = $_[0]; 523 $r = $_[0];
520 $current->ready; 524 Coro::ready($current);
521 }); 525 });
522 &Coro::schedule; 526 &Coro::schedule;
523 last unless $r; 527 last unless $r;
524 } 528 }
525 my $w = $self->{fh}->syswrite($buf) 529 my $w = syswrite $self->{fh}, $buf
526 or last; 530 or last;
527 $::written += $w; 531 $::written += $w;
528 $self->{written} += $w; 532 $self->{written} += $w;
529 $l += $r; 533 $l += $r;
530 } 534 }
531 }
532 535
533 close $fh; 536 close $fh;
537 }
534} 538}
535 539
5361; 5401;

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