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/cvs/cvsroot/Coro/myhttpd/httpd.pl
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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 1.42 by root, Wed Sep 12 16:45:59 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;
… …
48 schedule; 56 schedule;
49 } 57 }
50 } 58 }
51} 59}
52 60
61sub listen_on {
62 my $listen = $_[0];
63
64 push @listen_sockets, $listen;
65
66 # the "main thread"
67 async {
68 slog 1, "accepting connections";
69 while () {
70 $connections->down;
71 push @newcons, [$listen->accept];
72 #slog 3, "accepted @$connections ".scalar(@pool);
73 if (@pool) {
74 (pop @pool)->ready;
75 } else {
76 async \&handler;
77 }
78
79 }
80 };
81}
82
53my $http_port = new Coro::Socket 83my $http_port = new Coro::Socket
54 LocalAddr => $SERVER_HOST, 84 LocalAddr => $SERVER_HOST,
55 LocalPort => $SERVER_PORT, 85 LocalPort => $SERVER_PORT,
56 ReuseAddr => 1, 86 ReuseAddr => 1,
57 Listen => 50, 87 Listen => 50,
58 or die "unable to start server"; 88 or die "unable to start server";
59 89
60push @listen_sockets, $http_port; 90listen_on $http_port;
61 91
62# the "main thread" 92if ($SERVER_PORT2) {
63async { 93 my $http_port = new Coro::Socket
64 slog 1, "accepting connections"; 94 LocalAddr => $SERVER_HOST,
65 while () { 95 LocalPort => $SERVER_PORT2,
66 $connections->down; 96 ReuseAddr => 1,
67 push @newcons, [$http_port->accept]; 97 Listen => 50,
68 #slog 3, "accepted @$connections ".scalar(@pool); 98 or die "unable to start server";
99
100 listen_on $http_port;
101}
102
103our $NOW;
104our $HTTP_NOW;
105
106Event->timer(interval => 1, hard => 1, cb => sub {
69 $::NOW = time; 107 $NOW = time;
70 if (@pool) { 108 $HTTP_NOW = time2str $NOW;
71 (pop @pool)->ready; 109})->now;
72 } else {
73 async \&handler;
74 }
75
76 }
77};
78 110
79package conn; 111package conn;
80 112
81use Socket; 113use Socket;
82use HTTP::Date; 114use HTTP::Date;
83use Convert::Scalar 'weaken'; 115use Convert::Scalar 'weaken';
84use Linux::AIO; 116use Linux::AIO;
85 117
86Linux::AIO::min_parallel $::AIO_PARALLEL; 118Linux::AIO::min_parallel $::AIO_PARALLEL;
87
88my $aio_requests = new Coro::Semaphore $::AIO_PARALLEL * 4;
89 119
90Event->io(fd => Linux::AIO::poll_fileno, 120Event->io(fd => Linux::AIO::poll_fileno,
91 poll => 'r', async => 1, 121 poll => 'r', async => 1,
92 cb => \&Linux::AIO::poll_cb); 122 cb => \&Linux::AIO::poll_cb);
93 123
… …
111 141
112read_mimetypes; 142read_mimetypes;
113 143
114sub new { 144sub new {
115 my $class = shift; 145 my $class = shift;
146 my $fh = shift;
116 my $peername = shift; 147 my $peername = shift;
117 my $fh = shift;
118 my $self = bless { fh => $fh }, $class; 148 my $self = bless { fh => $fh }, $class;
119 my (undef, $iaddr) = unpack_sockaddr_in $peername 149 my (undef, $iaddr) = unpack_sockaddr_in $peername
120 or $self->err(500, "unable to decode peername"); 150 or $self->err(500, "unable to decode peername");
121 151
122 $self->{remote_addr} = inet_ntoa $iaddr; 152 $self->{remote_addr} = inet_ntoa $iaddr;
123 $self->{time} = $::NOW; 153 $self->{time} = $::NOW;
124 154
125 # enter ourselves into various lists
126 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
127
128 $::conns++; 155 $::conns++;
129 156
130 $self; 157 $self;
131} 158}
132 159
133sub DESTROY { 160sub DESTROY {
134 my $self = shift; 161 my $self = shift;
135
136 $::conns--; 162 $::conns--;
137
138 $self->eoconn; 163 $self->eoconn;
139 delete $conn{$self->{remote_addr}}{$self*1};
140} 164}
141 165
142# end of connection 166# end of connection
143sub eoconn { 167sub eoconn {
144 my $self = shift; 168 my $self = shift;
169
170 # clean up hints
171 delete $conn{$self->{remote_id}}{$self*1};
145 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 172 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
146} 173}
147 174
148sub slog { 175sub slog {
149 my $self = shift; 176 my $self = shift;
150 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]"); 177 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
… …
152 179
153sub response { 180sub response {
154 my ($self, $code, $msg, $hdr, $content) = @_; 181 my ($self, $code, $msg, $hdr, $content) = @_;
155 my $res = "HTTP/1.1 $code $msg\015\012"; 182 my $res = "HTTP/1.1 $code $msg\015\012";
156 183
157 $self->{h}{connection} ||= $hdr->{Connection}; 184 $self->{h}{connection} = "close" if $hdr->{Connection} =~ /close/;
158 185
159 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 186 $res .= "Date: $HTTP_NOW\015\012";
160 187
161 while (my ($h, $v) = each %$hdr) { 188 while (my ($h, $v) = each %$hdr) {
162 $res .= "$h: $v\015\012" 189 $res .= "$h: $v\015\012"
163 } 190 }
164 $res .= "\015\012"; 191 $res .= "\015\012";
… …
177sub err { 204sub err {
178 my $self = shift; 205 my $self = shift;
179 my ($code, $msg, $hdr, $content) = @_; 206 my ($code, $msg, $hdr, $content) = @_;
180 207
181 unless (defined $content) { 208 unless (defined $content) {
182 $content = "$code $msg"; 209 $content = "$code $msg\n";
183 $hdr->{"Content-Type"} = "text/plain"; 210 $hdr->{"Content-Type"} = "text/plain";
184 $hdr->{"Content-Length"} = length $content; 211 $hdr->{"Content-Length"} = length $content;
185 } 212 }
186 $hdr->{"Connection"} = "close"; 213 $hdr->{"Connection"} = "close";
187 214
188 $self->response($code, $msg, $hdr, $content); 215 $self->response($code, $msg, $hdr, $content);
189 216
190 die bless {}, err::; 217 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} 218}
226 219
227sub handle { 220sub handle {
228 my $self = shift; 221 my $self = shift;
229 my $fh = $self->{fh}; 222 my $fh = $self->{fh};
… …
246 } 239 }
247 240
248 $self->{h} = {}; 241 $self->{h} = {};
249 242
250 $fh->timeout($::RES_TIMEOUT); 243 $fh->timeout($::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 }
264 244
265 $req =~ /^(?:\015\012)? 245 $req =~ /^(?:\015\012)?
266 (GET|HEAD) \040+ 246 (GET|HEAD) \040+
267 ([^\040]+) \040+ 247 ([^\040]+) \040+
268 HTTP\/([0-9]+\.[0-9]+) 248 HTTP\/([0-9]+\.[0-9]+)
… …
293 273
294 $self->{h}{$h} = substr $v, 1 274 $self->{h}{$h} = substr $v, 1
295 while ($h, $v) = each %hdr; 275 while ($h, $v) = each %hdr;
296 } 276 }
297 277
278 # remote id should be unique per user
279 my $id = $self->{remote_addr};
280
281 if (exists $self->{h}{"client-ip"}) {
282 $id .= "[".$self->{h}{"client-ip"}."]";
283 } elsif (exists $self->{h}{"x-forwarded-for"}) {
284 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
285 }
286
287 $self->{remote_id} = $id;
288
289 if ($blocked{$id}) {
290 $self->err_blocked($blocked{$id})
291 if $blocked{$id} > $::NOW;
292
293 delete $blocked{$id};
294 }
295
296 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
297 my $delay = $::PER_TIMEOUT + 15;
298 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
299 if ($delay <= 0) {
300 $self->slog(2, "blocked ip $id");
301 $self->err_blocked;
302 } else {
303 Coro::Event::do_timer(after => 4); $delay -= 4;
304 }
305 }
306 }
307
298 # find out server name and port 308 # find out server name and port
299 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) { 309 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
300 $host = $1; 310 $host = $1;
301 } else { 311 } else {
302 $host = $self->{h}{host}; 312 $host = $self->{h}{host};
… …
311 $host = inet_ntoa $host; 321 $host = inet_ntoa $host;
312 } 322 }
313 323
314 $self->{server_name} = $host; 324 $self->{server_name} = $host;
315 325
316 # remote id should be unique per user 326 # enter ourselves into various lists
317 $self->{remote_id} = $self->{remote_addr}; 327 weaken ($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} = $self); 328 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
326 329
327 eval { 330 eval {
328 $self->map_uri; 331 $self->map_uri;
329 $self->respond; 332 $self->respond;
330 }; 333 };
… …
439 $idx); 442 $idx);
440} 443}
441 444
442sub handle_file { 445sub handle_file {
443 my $self = shift; 446 my $self = shift;
444 my $length = -s _; 447 my $length = $self->{stat}[7];
448 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
445 my $hdr = { 449 my $hdr = {
446 "Last-Modified" => time2str ((stat _)[9]), 450 "Last-Modified" => time2str ((stat _)[9]),
447 }; 451 };
448 452
449 my @code = (200, "ok"); 453 my @code = (200, "ok");
… …
461 } 465 }
462 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 466 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
463 } 467 }
464 $hdr->{"Content-Range"} = "bytes */$length"; 468 $hdr->{"Content-Range"} = "bytes */$length";
465 $hdr->{"Content-Length"} = $length; 469 $hdr->{"Content-Length"} = $length;
466 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
467 $self->err(416, "not satisfiable", $hdr, ""); 470 $self->err(416, "not satisfiable", $hdr, "");
468 471
469satisfiable: 472satisfiable:
470 # check for segmented downloads 473 # check for segmented downloads
471 if ($l && $::NO_SEGMENTED) { 474 if ($l && $::NO_SEGMENTED) {
472 my $delay = 60; 475 my $delay = $::PER_TIMEOUT + 15;
473 while (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 476 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
474 if ($delay <= 0) { 477 if ($delay <= 0) {
475 $self->err(400, "segmented downloads are not allowed", 478 $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 { 479 } else {
489 Coro::Event::do_timer(after => 3); $delay -= 3; 480 Coro::Event::do_timer(after => 4); $delay -= 4;
490 } 481 }
491 } 482 }
492 } 483 }
493 484
494 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 485 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
… …
505 $hdr->{"Content-Length"} = $length; 496 $hdr->{"Content-Length"} = $length;
506 497
507 $self->response(@code, $hdr, ""); 498 $self->response(@code, $hdr, "");
508 499
509 if ($self->{method} eq "GET") { 500 if ($self->{method} eq "GET") {
501 $self->{time} = $::NOW;
502
503 my $fudge = $queue->[0]->waiters;
504 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
505
506 $queue->[1] *= $fudge;
507 my $transfer = $queue->[0]->guard;
508
509 if ($fudge != 1) {
510 $queue->[1] /= $fudge;
511 $queue->[1] = $queue->[1] * $::wait_factor
512 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
513 }
514 $self->{time} = $::NOW;
515
516 $self->{fh}->writable or return;
517
510 my ($fh, $buf, $r); 518 my ($fh, $buf, $r);
511 my $current = $Coro::current; 519 my $current = $Coro::current;
512 open $fh, "<", $self->{path} 520 open $fh, "<", $self->{path}
513 or die "$self->{path}: late open failure ($!)"; 521 or die "$self->{path}: late open failure ($!)";
514 522
… …
523 while ($h > 0) { 531 while ($h > 0) {
524 if (0) { 532 if (0) {
525 sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h 533 sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
526 or last; 534 or last;
527 } else { 535 } else {
528 undef $buf;
529 $aio_requests->down;
530 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 536 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
531 $buf, 0, sub { 537 $buf, 0, sub {
532 $r = $_[0]; 538 $r = $_[0];
533 $current->ready; 539 Coro::ready($current);
534 }); 540 });
535 &Coro::schedule; 541 &Coro::schedule;
536 $aio_requests->up;
537 last unless $r; 542 last unless $r;
538 } 543 }
539 my $w = $self->{fh}->syswrite($buf) 544 my $w = syswrite $self->{fh}, $buf
540 or last; 545 or last;
541 $::written += $w; 546 $::written += $w;
542 $self->{written} += $w; 547 $self->{written} += $w;
543 $l += $r; 548 $l += $r;
544 } 549 }
545 }
546 550
547 close $fh; 551 close $fh;
552 }
548} 553}
549 554
5501; 5551;

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