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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 1.36 by root, Sun Sep 2 00:54:00 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"
… …
57 Listen => 50, 66 Listen => 50,
58 or die "unable to start server"; 67 or die "unable to start server";
59 68
60push @listen_sockets, $http_port; 69push @listen_sockets, $http_port;
61 70
71our $NOW;
72our $HTTP_NOW;
73
74Event->timer(interval => 1, hard => 1, cb => sub {
75 $NOW = time;
76 $HTTP_NOW = time2str $NOW;
77})->now;
78
62# the "main thread" 79# the "main thread"
63async { 80async {
64 slog 1, "accepting connections"; 81 slog 1, "accepting connections";
65 while () { 82 while () {
66 $connections->down; 83 $connections->down;
67 push @newcons, [$http_port->accept]; 84 push @newcons, [$http_port->accept];
68 #slog 3, "accepted @$connections ".scalar(@pool); 85 #slog 3, "accepted @$connections ".scalar(@pool);
69 $::NOW = time;
70 if (@pool) { 86 if (@pool) {
71 (pop @pool)->ready; 87 (pop @pool)->ready;
72 } else { 88 } else {
73 async \&handler; 89 async \&handler;
74 } 90 }
… …
82use HTTP::Date; 98use HTTP::Date;
83use Convert::Scalar 'weaken'; 99use Convert::Scalar 'weaken';
84use Linux::AIO; 100use Linux::AIO;
85 101
86Linux::AIO::min_parallel $::AIO_PARALLEL; 102Linux::AIO::min_parallel $::AIO_PARALLEL;
103
104my $aio_requests = new Coro::Semaphore $::AIO_PARALLEL * 4;
87 105
88Event->io(fd => Linux::AIO::poll_fileno, 106Event->io(fd => Linux::AIO::poll_fileno,
89 poll => 'r', async => 1, 107 poll => 'r', async => 1,
90 cb => \&Linux::AIO::poll_cb); 108 cb => \&Linux::AIO::poll_cb);
91 109
… …
118 or $self->err(500, "unable to decode peername"); 136 or $self->err(500, "unable to decode peername");
119 137
120 $self->{remote_addr} = inet_ntoa $iaddr; 138 $self->{remote_addr} = inet_ntoa $iaddr;
121 $self->{time} = $::NOW; 139 $self->{time} = $::NOW;
122 140
123 # enter ourselves into various lists
124 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
125
126 $::conns++; 141 $::conns++;
127 142
128 $self; 143 $self;
129} 144}
130 145
… …
132 my $self = shift; 147 my $self = shift;
133 148
134 $::conns--; 149 $::conns--;
135 150
136 $self->eoconn; 151 $self->eoconn;
137 delete $conn{$self->{remote_addr}}{$self*1};
138} 152}
139 153
140# end of connection 154# end of connection
141sub eoconn { 155sub eoconn {
142 my $self = shift; 156 my $self = shift;
157
158 # clean up hints
159 delete $conn{$self->{remote_id}}{$self*1};
143 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 160 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
144} 161}
145 162
146sub slog { 163sub slog {
147 my $self = shift; 164 my $self = shift;
148 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 165 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
149} 166}
150 167
151sub response { 168sub response {
152 my ($self, $code, $msg, $hdr, $content) = @_; 169 my ($self, $code, $msg, $hdr, $content) = @_;
153 my $res = "HTTP/1.1 $code $msg\015\012"; 170 my $res = "HTTP/1.1 $code $msg\015\012";
154 171
155 $self->{h}{connection} ||= $hdr->{Connection}; 172 $self->{h}{connection} ||= $hdr->{Connection};
156 173
157 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 174 $res .= "Date: $HTTP_NOW\015\012";
158 175
159 while (my ($h, $v) = each %$hdr) { 176 while (my ($h, $v) = each %$hdr) {
160 $res .= "$h: $v\015\012" 177 $res .= "$h: $v\015\012"
161 } 178 }
162 $res .= "\015\012"; 179 $res .= "\015\012";
… …
175sub err { 192sub err {
176 my $self = shift; 193 my $self = shift;
177 my ($code, $msg, $hdr, $content) = @_; 194 my ($code, $msg, $hdr, $content) = @_;
178 195
179 unless (defined $content) { 196 unless (defined $content) {
180 $content = "$code $msg"; 197 $content = "$code $msg\n";
181 $hdr->{"Content-Type"} = "text/plain"; 198 $hdr->{"Content-Type"} = "text/plain";
182 $hdr->{"Content-Length"} = length $content; 199 $hdr->{"Content-Length"} = length $content;
183 } 200 }
184 $hdr->{"Connection"} = "close"; 201 $hdr->{"Connection"} = "close";
185 202
186 $self->response($code, $msg, $hdr, $content); 203 $self->response($code, $msg, $hdr, $content);
187 204
188 die bless {}, err::; 205 die bless {}, err::;
189} 206}
190 207
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 { 208sub handle {
226 my $self = shift; 209 my $self = shift;
227 my $fh = $self->{fh}; 210 my $fh = $self->{fh};
211
212 my $host;
228 213
229 $fh->timeout($::REQ_TIMEOUT); 214 $fh->timeout($::REQ_TIMEOUT);
230 while() { 215 while() {
231 $self->{reqs}++; 216 $self->{reqs}++;
232 217
… …
242 } 227 }
243 228
244 $self->{h} = {}; 229 $self->{h} = {};
245 230
246 $fh->timeout($::RES_TIMEOUT); 231 $fh->timeout($::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 }
260 232
261 $req =~ /^(?:\015\012)? 233 $req =~ /^(?:\015\012)?
262 (GET|HEAD) \040+ 234 (GET|HEAD) \040+
263 ([^\040]+) \040+ 235 ([^\040]+) \040+
264 HTTP\/([0-9]+\.[0-9]+) 236 HTTP\/([0-9]+\.[0-9]+)
… …
289 261
290 $self->{h}{$h} = substr $v, 1 262 $self->{h}{$h} = substr $v, 1
291 while ($h, $v) = each %hdr; 263 while ($h, $v) = each %hdr;
292 } 264 }
293 265
266 # remote id should be unique per user
267 my $id = $self->{remote_addr};
268
269 if (exists $self->{h}{"client-ip"}) {
270 $id .= "[".$self->{h}{"client-ip"}."]";
271 } elsif (exists $self->{h}{"x-forwarded-for"}) {
272 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
273 }
274
275 $self->{remote_id} = $id;
276
277 if ($blocked{$id}) {
278 $self->err_blocked($blocked{$id})
279 if $blocked{$id} > $::NOW;
280
281 delete $blocked{$id};
282 }
283
284 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
285 my $delay = $::PER_TIMEOUT + 15;
286 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
287 if ($delay <= 0) {
288 $self->slog(2, "blocked ip $id");
289 $self->err_blocked;
290 } else {
291 Coro::Event::do_timer(after => 4); $delay -= 4;
292 }
293 }
294 }
295
296 # find out server name and port
297 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
298 $host = $1;
299 } else {
300 $host = $self->{h}{host};
301 }
302
303 if (defined $host) {
294 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 304 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
305 } else {
306 ($self->{server_port}, $host)
307 = unpack_sockaddr_in $self->{fh}->getsockname
308 or $self->err(500, "unable to get socket name");
309 $host = inet_ntoa $host;
310 }
295 311
312 $self->{server_name} = $host;
313
314 # enter ourselves into various lists
315 weaken ($conn{$id}{$self*1} = $self);
296 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 316 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
297 317
298 eval { 318 eval {
299 $self->map_uri; 319 $self->map_uri;
300 $self->respond; 320 $self->respond;
301 }; 321 };
302 322
303 $self->eoconn; 323 $self->eoconn;
304 324
305 die if $@ && !ref $@; 325 die if $@ && !ref $@;
306 326
307 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 327 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
308 328
309 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
310 $fh->timeout($::PER_TIMEOUT); 329 $fh->timeout($::PER_TIMEOUT);
311 } 330 }
312} 331}
313 332
314# uri => path mapping 333# uri => path mapping
315sub map_uri { 334sub map_uri {
316 my $self = shift; 335 my $self = shift;
317 my $host = $self->{h}{host} || "default"; 336 my $host = $self->{server_name};
318 my $uri = $self->{uri}; 337 my $uri = $self->{uri};
319 338
320 # some massaging, also makes it more secure 339 # some massaging, also makes it more secure
321 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 340 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
322 $uri =~ s%//+%/%g; 341 $uri =~ s%//+%/%g;
… …
332 $self->{path} = "$::DOCROOT/$host$uri"; 351 $self->{path} = "$::DOCROOT/$host$uri";
333 352
334 $self->access_check; 353 $self->access_check;
335} 354}
336 355
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 { 356sub _cgi {
366 my $self = shift; 357 my $self = shift;
367 my $path = shift; 358 my $path = shift;
368 my $fh; 359 my $fh;
369 360
370 # no two-way xxx supported 361 # no two-way xxx supported
371 if (0 == fork) { 362 if (0 == fork) {
372 open STDOUT, ">&".fileno($self->{fh}); 363 open STDOUT, ">&".fileno($self->{fh});
373 if (chdir $::DOCROOT) { 364 if (chdir $::DOCROOT) {
374 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 365 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
375 $ENV{HTTP_HOST} = $self->server_host; 366 $ENV{HTTP_HOST} = $self->{server_name};
376 $ENV{HTTP_PORT} = $self->{server_host}; 367 $ENV{HTTP_PORT} = $self->{server_port};
377 $ENV{SCRIPT_NAME} = $self->{name}; 368 $ENV{SCRIPT_NAME} = $self->{name};
378 exec $path; 369 exec $path;
379 } 370 }
380 Coro::State::_exit(0); 371 Coro::State::_exit(0);
381 } else { 372 } else {
373 die;
382 } 374 }
375}
376
377sub server_hostport {
378 $_[0]{server_port} == 80
379 ? $_[0]{server_name}
380 : "$_[0]{server_name}:$_[0]{server_port}";
383} 381}
384 382
385sub respond { 383sub respond {
386 my $self = shift; 384 my $self = shift;
387 my $path = $self->{path}; 385 my $path = $self->{path};
… …
397 395
398 if (-d _ && -r _) { 396 if (-d _ && -r _) {
399 # directory 397 # directory
400 if ($path !~ /\/$/) { 398 if ($path !~ /\/$/) {
401 # create a redirect to get the trailing "/" 399 # create a redirect to get the trailing "/"
402 my $host = $self->server_hostport; 400 # we don't try to avoid the :80
403 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 401 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
404 } else { 402 } else {
405 $ims < $self->{stat}[9] 403 $ims < $self->{stat}[9]
406 or $self->err(304, "not modified"); 404 or $self->err(304, "not modified");
407 405
408 if (-r "$path/index.html") { 406 if (-r "$path/index.html") {
… …
432 $idx); 430 $idx);
433} 431}
434 432
435sub handle_file { 433sub handle_file {
436 my $self = shift; 434 my $self = shift;
437 my $length = -s _; 435 my $length = $self->{stat}[7];
436 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
438 my $hdr = { 437 my $hdr = {
439 "Last-Modified" => time2str ((stat _)[9]), 438 "Last-Modified" => time2str ((stat _)[9]),
440 }; 439 };
441 440
442 my @code = (200, "ok"); 441 my @code = (200, "ok");
… …
454 } 453 }
455 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 454 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
456 } 455 }
457 $hdr->{"Content-Range"} = "bytes */$length"; 456 $hdr->{"Content-Range"} = "bytes */$length";
458 $hdr->{"Content-Length"} = $length; 457 $hdr->{"Content-Length"} = $length;
459 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
460 $self->err(416, "not satisfiable", $hdr, ""); 458 $self->err(416, "not satisfiable", $hdr, "");
461 459
462satisfiable: 460satisfiable:
463 # check for segmented downloads 461 # check for segmented downloads
464 if ($l && $::NO_SEGMENTED) { 462 if ($l && $::NO_SEGMENTED) {
463 my $delay = $::PER_TIMEOUT + 15;
465 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 464 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
466 $self->err(400, "segmented downloads are not allowed", 465 if ($delay <= 0) {
467 { "Content-Type" => "text/html", Connection => "close" }, <<EOF); 466 $self->err_segmented_download;
468<html> 467 } else {
469<head> 468 Coro::Event::do_timer(after => 4); $delay -= 4;
470<title>Segmented downloads are not allowed</title> 469 }
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 } 470 }
481 } 471 }
482 472
483 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 473 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
484 @code = (206, "partial content"); 474 @code = (206, "partial content");
… …
494 $hdr->{"Content-Length"} = $length; 484 $hdr->{"Content-Length"} = $length;
495 485
496 $self->response(@code, $hdr, ""); 486 $self->response(@code, $hdr, "");
497 487
498 if ($self->{method} eq "GET") { 488 if ($self->{method} eq "GET") {
489 $self->{time} = $::NOW;
490
491 my $fudge = $queue->[0]->waiters;
492 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
493
494 $queue->[1] *= $fudge;
495 my $transfer = $queue->[0]->guard;
496
497 if ($fudge != 1) {
498 $queue->[1] /= $fudge;
499 $queue->[1] = $queue->[1] * $::wait_factor
500 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
501 }
502 $self->{time} = $::NOW;
503
504 $self->{fh}->writable or return;
505
499 my ($fh, $buf, $r); 506 my ($fh, $buf, $r);
500 my $current = $Coro::current; 507 my $current = $Coro::current;
501 open $fh, "<", $self->{path} 508 open $fh, "<", $self->{path}
502 or die "$self->{path}: late open failure ($!)"; 509 or die "$self->{path}: late open failure ($!)";
503 510
… …
512 while ($h > 0) { 519 while ($h > 0) {
513 if (0) { 520 if (0) {
514 sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h 521 sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
515 or last; 522 or last;
516 } else { 523 } else {
524 undef $buf;
525 $aio_requests->down;
517 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 526 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
518 $buf, 0, sub { 527 $buf, 0, sub {
519 $r = $_[0]; 528 $r = $_[0];
520 $current->ready; 529 $current->ready;
521 }); 530 });
522 &Coro::schedule; 531 &Coro::schedule;
532 $aio_requests->up;
523 last unless $r; 533 last unless $r;
524 } 534 }
525 my $w = $self->{fh}->syswrite($buf) 535 my $w = $self->{fh}->syswrite($buf)
526 or last; 536 or last;
527 $::written += $w; 537 $::written += $w;
528 $self->{written} += $w; 538 $self->{written} += $w;
529 $l += $r; 539 $l += $r;
530 } 540 }
531 }
532 541
533 close $fh; 542 close $fh;
543 }
534} 544}
535 545
5361; 5461;

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