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Comparing cvsroot/Coro/myhttpd/httpd.pl (file contents):
Revision 1.29 by root, Sat Aug 25 15:14:03 2001 UTC vs.
Revision 1.45 by root, Sun Nov 11 03:32:19 2001 UTC

1use Coro; 1use Coro;
2use Coro::Semaphore; 2use Coro::Semaphore;
3use Coro::Event; 3use Coro::Event;
4use Coro::Socket; 4use Coro::Socket;
5use Coro::Signal;
6
7use HTTP::Date;
5 8
6no utf8; 9no utf8;
7use bytes; 10use bytes;
8 11
9# at least on my machine, this thingy serves files 12# at least on my machine, this thingy serves files
… …
25 my $level = shift; 28 my $level = shift;
26 my $format = shift; 29 my $format = shift;
27 printf "---: $format\n", @_; 30 printf "---: $format\n", @_;
28} 31}
29 32
30my $connections = new Coro::Semaphore $MAX_CONNECTS; 33our $connections = new Coro::Semaphore $MAX_CONNECTS || 250;
34our $httpevent = new Coro::Signal;
35
36our $wait_factor = 0.95;
37
38our @transfers = (
39 [(new Coro::Semaphore $MAX_TRANSFERS_SMALL || 50), 1],
40 [(new Coro::Semaphore $MAX_TRANSFERS_LARGE || 50), 1],
41);
31 42
32my @newcons; 43my @newcons;
33my @pool; 44my @pool;
34 45
35# one "execution thread" 46# one "execution thread"
36sub handler { 47sub handler {
37 while () { 48 while () {
38 my $new = pop @newcons;
39 if ($new) { 49 if (@newcons) {
40 eval { 50 eval {
41 conn->new(@$new)->handle; 51 conn->new(@{pop @newcons})->handle;
42 }; 52 };
43 slog 1, "$@" if $@ && !ref $@; 53 slog 1, "$@" if $@ && !ref $@;
44 $connections->up; 54 $connections->up;
45 } else { 55 } else {
46 last if @pool >= $MAX_POOL; 56 last if @pool >= $MAX_POOL;
… …
48 schedule; 58 schedule;
49 } 59 }
50 } 60 }
51} 61}
52 62
63sub listen_on {
64 my $listen = $_[0];
65
66 push @listen_sockets, $listen;
67
68 # the "main thread"
69 async {
70 slog 1, "accepting connections";
71 while () {
72 $connections->down;
73 push @newcons, [$listen->accept];
74 #slog 3, "accepted @$connections ".scalar(@pool);
75 if (@pool) {
76 (pop @pool)->ready;
77 } else {
78 async \&handler;
79 }
80
81 }
82 };
83}
84
53my $http_port = new Coro::Socket 85my $http_port = new Coro::Socket
54 LocalAddr => $SERVER_HOST, 86 LocalAddr => $SERVER_HOST,
55 LocalPort => $SERVER_PORT, 87 LocalPort => $SERVER_PORT,
56 ReuseAddr => 1, 88 ReuseAddr => 1,
57 Listen => 50, 89 Listen => 50,
58 or die "unable to start server"; 90 or die "unable to start server";
59 91
60push @listen_sockets, $http_port; 92listen_on $http_port;
61 93
62# the "main thread" 94if ($SERVER_PORT2) {
63async { 95 my $http_port = new Coro::Socket
64 slog 1, "accepting connections"; 96 LocalAddr => $SERVER_HOST,
65 while () { 97 LocalPort => $SERVER_PORT2,
66 $connections->down; 98 ReuseAddr => 1,
67 push @newcons, [$http_port->accept]; 99 Listen => 50,
68 #slog 3, "accepted @$connections ".scalar(@pool); 100 or die "unable to start server";
101
102 listen_on $http_port;
103}
104
105our $NOW;
106our $HTTP_NOW;
107
108Event->timer(interval => 1, hard => 1, cb => sub {
69 $::NOW = time; 109 $NOW = time;
70 if (@pool) { 110 $HTTP_NOW = time2str $NOW;
71 (pop @pool)->ready; 111})->now;
72 } else {
73 async \&handler;
74 }
75
76 }
77};
78 112
79package conn; 113package conn;
80 114
81use Socket; 115use Socket;
82use HTTP::Date; 116use HTTP::Date;
83use Convert::Scalar 'weaken'; 117use Convert::Scalar 'weaken';
84use Linux::AIO; 118use Linux::AIO;
85 119
86Linux::AIO::min_parallel $::AIO_PARALLEL; 120Linux::AIO::min_parallel $::AIO_PARALLEL;
87
88my $aio_requests = new Coro::Semaphore $::AIO_PARALLEL * 4;
89 121
90Event->io(fd => Linux::AIO::poll_fileno, 122Event->io(fd => Linux::AIO::poll_fileno,
91 poll => 'r', async => 1, 123 poll => 'r', async => 1,
92 cb => \&Linux::AIO::poll_cb); 124 cb => \&Linux::AIO::poll_cb);
93 125
… …
111 143
112read_mimetypes; 144read_mimetypes;
113 145
114sub new { 146sub new {
115 my $class = shift; 147 my $class = shift;
148 my $fh = shift;
116 my $peername = shift; 149 my $peername = shift;
117 my $fh = shift;
118 my $self = bless { fh => $fh }, $class; 150 my $self = bless { fh => $fh }, $class;
119 my (undef, $iaddr) = unpack_sockaddr_in $peername 151 my (undef, $iaddr) = unpack_sockaddr_in $peername
120 or $self->err(500, "unable to decode peername"); 152 or $self->err(500, "unable to decode peername");
121 153
122 $self->{remote_addr} = inet_ntoa $iaddr; 154 $self->{remote_addr} = inet_ntoa $iaddr;
123 $self->{time} = $::NOW; 155 $self->{time} = $::NOW;
124 156
125 # enter ourselves into various lists
126 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
127
128 $::conns++; 157 $::conns++;
129 158
130 $self; 159 $self;
131} 160}
132 161
133sub DESTROY { 162sub DESTROY {
134 my $self = shift; 163 my $self = shift;
135
136 $::conns--; 164 $::conns--;
137
138 $self->eoconn; 165 $self->eoconn;
139 delete $conn{$self->{remote_addr}}{$self*1};
140} 166}
141 167
142# end of connection 168# end of connection
143sub eoconn { 169sub eoconn {
144 my $self = shift; 170 my $self = shift;
171
172 # clean up hints
173 delete $conn{$self->{remote_id}}{$self*1};
145 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 174 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
175
176 $httpevent->broadcast;
146} 177}
147 178
148sub slog { 179sub slog {
149 my $self = shift; 180 my $self = shift;
150 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]"); 181 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
… …
152 183
153sub response { 184sub response {
154 my ($self, $code, $msg, $hdr, $content) = @_; 185 my ($self, $code, $msg, $hdr, $content) = @_;
155 my $res = "HTTP/1.1 $code $msg\015\012"; 186 my $res = "HTTP/1.1 $code $msg\015\012";
156 187
157 $self->{h}{connection} ||= $hdr->{Connection}; 188 $self->{h}{connection} = "close"
189 if exists $hdr->{Connection} # to avoid "empty" header lines due to vivification
190 and $hdr->{Connection} =~ /close/;
158 191
159 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 192 $res .= "Date: $HTTP_NOW\015\012";
160 193
161 while (my ($h, $v) = each %$hdr) { 194 while (my ($h, $v) = each %$hdr) {
162 $res .= "$h: $v\015\012" 195 $res .= "$h: $v\015\012"
163 } 196 }
164 $res .= "\015\012"; 197 $res .= "\015\012";
… …
177sub err { 210sub err {
178 my $self = shift; 211 my $self = shift;
179 my ($code, $msg, $hdr, $content) = @_; 212 my ($code, $msg, $hdr, $content) = @_;
180 213
181 unless (defined $content) { 214 unless (defined $content) {
182 $content = "$code $msg"; 215 $content = "$code $msg\n";
183 $hdr->{"Content-Type"} = "text/plain"; 216 $hdr->{"Content-Type"} = "text/plain";
184 $hdr->{"Content-Length"} = length $content; 217 $hdr->{"Content-Length"} = length $content;
185 } 218 }
186 $hdr->{"Connection"} = "close"; 219 $hdr->{"Connection"} = "close";
187 220
188 $self->response($code, $msg, $hdr, $content); 221 $self->response($code, $msg, $hdr, $content);
189 222
190 die bless {}, err::; 223 die bless {}, err::;
191}
192
193sub err_blocked {
194 my $self = shift;
195 my $ip = $self->{remote_addr};
196 my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
197
198 Coro::Event::do_timer(after => 20*rand);
199
200 $self->err(401, "too many connections",
201 {
202 "Content-Type" => "text/html",
203 "Retry-After" => $::BLOCKTIME,
204 "Warning" => "Please do NOT retry, you have been blocked",
205 "WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
206 "Connection" => "close",
207 },
208 <<EOF);
209<html>
210<head>
211<title>Too many connections</title>
212</head>
213<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
214
215<p>You have been blocked because you opened too many connections. You
216may retry at</p>
217
218 <p><blockquote>$time.</blockquote></p>
219
220<p>Until then, each new access will renew the block. You might want to have a
221look at the <a href="http://www.goof.com/pcg/marc/animefaq.html#connectionlimit">FAQ</a>.</p>
222
223</body></html>
224EOF
225} 224}
226 225
227sub handle { 226sub handle {
228 my $self = shift; 227 my $self = shift;
229 my $fh = $self->{fh}; 228 my $fh = $self->{fh};
… …
246 } 245 }
247 246
248 $self->{h} = {}; 247 $self->{h} = {};
249 248
250 $fh->timeout($::RES_TIMEOUT); 249 $fh->timeout($::RES_TIMEOUT);
251 my $ip = $self->{remote_addr};
252
253 if ($blocked{$ip}) {
254 $self->err_blocked($blocked{$ip})
255 if $blocked{$ip} > $::NOW;
256
257 delete $blocked{$ip};
258 }
259
260 if (%{$conn{$ip}} > $::MAX_CONN_IP) {
261 $self->slog(2, "blocked ip $ip");
262 $self->err_blocked;
263 }
264 250
265 $req =~ /^(?:\015\012)? 251 $req =~ /^(?:\015\012)?
266 (GET|HEAD) \040+ 252 (GET|HEAD) \040+
267 ([^\040]+) \040+ 253 ([^\040]+) \040+
268 HTTP\/([0-9]+\.[0-9]+) 254 HTTP\/([0-9]+\.[0-9]+)
… …
293 279
294 $self->{h}{$h} = substr $v, 1 280 $self->{h}{$h} = substr $v, 1
295 while ($h, $v) = each %hdr; 281 while ($h, $v) = each %hdr;
296 } 282 }
297 283
284 # remote id should be unique per user
285 my $id = $self->{remote_addr};
286
287 if (exists $self->{h}{"client-ip"}) {
288 $id .= "[".$self->{h}{"client-ip"}."]";
289 } elsif (exists $self->{h}{"x-forwarded-for"}) {
290 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
291 }
292
293 $self->{remote_id} = $id;
294
295 if ($blocked{$id}) {
296 $self->err_blocked($blocked{$id})
297 if $blocked{$id} > $::NOW;
298
299 delete $blocked{$id};
300 }
301
302 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
303 my $delay = $::PER_TIMEOUT + $::NOW + 15;
304 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
305 if ($delay < $::NOW) {
306 $self->slog(2, "blocked ip $id");
307 $self->err_blocked;
308 } else {
309 $httpevent->wait;
310 }
311 }
312 }
313
298 # find out server name and port 314 # find out server name and port
299 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) { 315 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
300 $host = $1; 316 $host = $1;
301 } else { 317 } else {
302 $host = $self->{h}{host}; 318 $host = $self->{h}{host};
… …
304 320
305 if (defined $host) { 321 if (defined $host) {
306 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80; 322 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
307 } else { 323 } else {
308 ($self->{server_port}, $host) 324 ($self->{server_port}, $host)
309 = unpack_sockaddr_in $self->{fh}->getsockname 325 = unpack_sockaddr_in $self->{fh}->sockname
310 or $self->err(500, "unable to get socket name"); 326 or $self->err(500, "unable to get socket name");
311 $host = inet_ntoa $host; 327 $host = inet_ntoa $host;
312 } 328 }
313 329
314 $self->{server_name} = $host; 330 $self->{server_name} = $host;
315 331
316 # remote id should be unique per user 332 # enter ourselves into various lists
317 $self->{remote_id} = $self->{remote_addr}; 333 weaken ($conn{$id}{$self*1} = $self);
318
319 if (exists $self->{h}{"client-ip"}) {
320 $self->{remote_id} .= "[".$self->{h}{"client-ip"}."]";
321 } elsif (exists $self->{h}{"x-forwarded-for"}) {
322 $self->{remote_id} .= "[".$self->{h}{"x-forwarded-for"}."]";
323 }
324
325 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 334 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
326 335
327 eval { 336 eval {
328 $self->map_uri; 337 $self->map_uri;
329 $self->respond; 338 $self->respond;
330 }; 339 };
… …
332 $self->eoconn; 341 $self->eoconn;
333 342
334 die if $@ && !ref $@; 343 die if $@ && !ref $@;
335 344
336 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1; 345 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
346
347 $httpevent->broadcast;
337 348
338 $fh->timeout($::PER_TIMEOUT); 349 $fh->timeout($::PER_TIMEOUT);
339 } 350 }
340} 351}
341 352
… …
411 } else { 422 } else {
412 $ims < $self->{stat}[9] 423 $ims < $self->{stat}[9]
413 or $self->err(304, "not modified"); 424 or $self->err(304, "not modified");
414 425
415 if (-r "$path/index.html") { 426 if (-r "$path/index.html") {
416 $self->{path} .= "/index.html"; 427 # replace directory "size" by index.html filesize
428 $self->{stat}[7] = (stat ($self->{path} .= "/index.html"))[7];
417 $self->handle_file; 429 $self->handle_file;
418 } else { 430 } else {
419 $self->handle_dir; 431 $self->handle_dir;
420 } 432 }
421 } 433 }
… …
439 $idx); 451 $idx);
440} 452}
441 453
442sub handle_file { 454sub handle_file {
443 my $self = shift; 455 my $self = shift;
444 my $length = -s _; 456 my $length = $self->{stat}[7];
457 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
445 my $hdr = { 458 my $hdr = {
446 "Last-Modified" => time2str ((stat _)[9]), 459 "Last-Modified" => time2str ((stat _)[9]),
447 }; 460 };
448 461
449 my @code = (200, "ok"); 462 my @code = (200, "ok");
… …
461 } 474 }
462 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 475 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
463 } 476 }
464 $hdr->{"Content-Range"} = "bytes */$length"; 477 $hdr->{"Content-Range"} = "bytes */$length";
465 $hdr->{"Content-Length"} = $length; 478 $hdr->{"Content-Length"} = $length;
466 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
467 $self->err(416, "not satisfiable", $hdr, ""); 479 $self->err(416, "not satisfiable", $hdr, "");
468 480
469satisfiable: 481satisfiable:
470 # check for segmented downloads 482 # check for segmented downloads
471 if ($l && $::NO_SEGMENTED) { 483 if ($l && $::NO_SEGMENTED) {
472 my $delay = 60; 484 my $delay = $::NOW + $::PER_TIMEOUT + 15;
473 while (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 485 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
474 if ($delay <= 0) { 486 if ($delay <= $::NOW) {
475 $self->err(400, "segmented downloads are not allowed", 487 $self->err_segmented_download;
476 { "Content-Type" => "text/html", Connection => "close" }, <<EOF);
477<html>
478<head>
479<title>Segmented downloads are not allowed</title>
480</head>
481<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
482
483<p>Segmented downloads are not allowed on this server. Please refer to the
484<a href="http://www.goof.com/pcg/marc/animefaq.html#segmented_downloads">FAQ</a>.</p>
485
486</body></html>
487EOF
488 } else { 488 } else {
489 Coro::Event::do_timer(after => 3); $delay -= 3; 489 $httpevent->broadcast;
490 } 490 }
491 } 491 }
492 } 492 }
493 493
494 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 494 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
… …
505 $hdr->{"Content-Length"} = $length; 505 $hdr->{"Content-Length"} = $length;
506 506
507 $self->response(@code, $hdr, ""); 507 $self->response(@code, $hdr, "");
508 508
509 if ($self->{method} eq "GET") { 509 if ($self->{method} eq "GET") {
510 $self->{time} = $::NOW;
511
512 my $fudge = $queue->[0]->waiters;
513 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
514
515 $queue->[1] *= $fudge;
516 my $transfer = $queue->[0]->guard;
517
518 if ($fudge != 1) {
519 $queue->[1] /= $fudge;
520 $queue->[1] = $queue->[1] * $::wait_factor
521 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
522 }
523 $self->{time} = $::NOW;
524
525 $self->{fh}->writable or return;
526
510 my ($fh, $buf, $r); 527 my ($fh, $buf, $r);
511 my $current = $Coro::current; 528 my $current = $Coro::current;
512 open $fh, "<", $self->{path} 529 open $fh, "<", $self->{path}
513 or die "$self->{path}: late open failure ($!)"; 530 or die "$self->{path}: late open failure ($!)";
514 531
… …
523 while ($h > 0) { 540 while ($h > 0) {
524 if (0) { 541 if (0) {
525 sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h 542 sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
526 or last; 543 or last;
527 } else { 544 } else {
528 undef $buf;
529 $aio_requests->down;
530 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 545 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
531 $buf, 0, sub { 546 $buf, 0, sub {
532 $r = $_[0]; 547 $r = $_[0];
533 $current->ready; 548 Coro::ready($current);
534 }); 549 });
535 &Coro::schedule; 550 &Coro::schedule;
536 $aio_requests->up;
537 last unless $r; 551 last unless $r;
538 } 552 }
539 my $w = $self->{fh}->syswrite($buf) 553 my $w = syswrite $self->{fh}, $buf
540 or last; 554 or last;
541 $::written += $w; 555 $::written += $w;
542 $self->{written} += $w; 556 $self->{written} += $w;
543 $l += $r; 557 $l += $r;
544 } 558 }
545 }
546 559
547 close $fh; 560 close $fh;
561 }
548} 562}
549 563
5501; 5641;

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