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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 1.36 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 }
… …
120 or $self->err(500, "unable to decode peername"); 136 or $self->err(500, "unable to decode peername");
121 137
122 $self->{remote_addr} = inet_ntoa $iaddr; 138 $self->{remote_addr} = inet_ntoa $iaddr;
123 $self->{time} = $::NOW; 139 $self->{time} = $::NOW;
124 140
125 # enter ourselves into various lists
126 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
127
128 $::conns++; 141 $::conns++;
129 142
130 $self; 143 $self;
131} 144}
132 145
… …
134 my $self = shift; 147 my $self = shift;
135 148
136 $::conns--; 149 $::conns--;
137 150
138 $self->eoconn; 151 $self->eoconn;
139 delete $conn{$self->{remote_addr}}{$self*1};
140} 152}
141 153
142# end of connection 154# end of connection
143sub eoconn { 155sub eoconn {
144 my $self = shift; 156 my $self = shift;
157
158 # clean up hints
159 delete $conn{$self->{remote_id}}{$self*1};
145 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 160 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
146} 161}
147 162
148sub slog { 163sub slog {
149 my $self = shift; 164 my $self = shift;
150 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]"); 165 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
… …
154 my ($self, $code, $msg, $hdr, $content) = @_; 169 my ($self, $code, $msg, $hdr, $content) = @_;
155 my $res = "HTTP/1.1 $code $msg\015\012"; 170 my $res = "HTTP/1.1 $code $msg\015\012";
156 171
157 $self->{h}{connection} ||= $hdr->{Connection}; 172 $self->{h}{connection} ||= $hdr->{Connection};
158 173
159 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 174 $res .= "Date: $HTTP_NOW\015\012";
160 175
161 while (my ($h, $v) = each %$hdr) { 176 while (my ($h, $v) = each %$hdr) {
162 $res .= "$h: $v\015\012" 177 $res .= "$h: $v\015\012"
163 } 178 }
164 $res .= "\015\012"; 179 $res .= "\015\012";
… …
177sub err { 192sub err {
178 my $self = shift; 193 my $self = shift;
179 my ($code, $msg, $hdr, $content) = @_; 194 my ($code, $msg, $hdr, $content) = @_;
180 195
181 unless (defined $content) { 196 unless (defined $content) {
182 $content = "$code $msg"; 197 $content = "$code $msg\n";
183 $hdr->{"Content-Type"} = "text/plain"; 198 $hdr->{"Content-Type"} = "text/plain";
184 $hdr->{"Content-Length"} = length $content; 199 $hdr->{"Content-Length"} = length $content;
185 } 200 }
186 $hdr->{"Connection"} = "close"; 201 $hdr->{"Connection"} = "close";
187 202
188 $self->response($code, $msg, $hdr, $content); 203 $self->response($code, $msg, $hdr, $content);
189 204
190 die bless {}, err::; 205 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} 206}
226 207
227sub handle { 208sub handle {
228 my $self = shift; 209 my $self = shift;
229 my $fh = $self->{fh}; 210 my $fh = $self->{fh};
… …
246 } 227 }
247 228
248 $self->{h} = {}; 229 $self->{h} = {};
249 230
250 $fh->timeout($::RES_TIMEOUT); 231 $fh->timeout($::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 }
264 232
265 $req =~ /^(?:\015\012)? 233 $req =~ /^(?:\015\012)?
266 (GET|HEAD) \040+ 234 (GET|HEAD) \040+
267 ([^\040]+) \040+ 235 ([^\040]+) \040+
268 HTTP\/([0-9]+\.[0-9]+) 236 HTTP\/([0-9]+\.[0-9]+)
… …
293 261
294 $self->{h}{$h} = substr $v, 1 262 $self->{h}{$h} = substr $v, 1
295 while ($h, $v) = each %hdr; 263 while ($h, $v) = each %hdr;
296 } 264 }
297 265
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); $delay -= 4;
292 }
293 }
294 }
295
298 # find out server name and port 296 # find out server name and port
299 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) { 297 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
300 $host = $1; 298 $host = $1;
301 } else { 299 } else {
302 $host = $self->{h}{host}; 300 $host = $self->{h}{host};
… …
311 $host = inet_ntoa $host; 309 $host = inet_ntoa $host;
312 } 310 }
313 311
314 $self->{server_name} = $host; 312 $self->{server_name} = $host;
315 313
316 # remote id should be unique per user 314 # enter ourselves into various lists
317 $self->{remote_id} = $self->{remote_addr}; 315 weaken ($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} = $self); 316 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
326 317
327 eval { 318 eval {
328 $self->map_uri; 319 $self->map_uri;
329 $self->respond; 320 $self->respond;
330 }; 321 };
… …
439 $idx); 430 $idx);
440} 431}
441 432
442sub handle_file { 433sub handle_file {
443 my $self = shift; 434 my $self = shift;
444 my $length = -s _; 435 my $length = $self->{stat}[7];
436 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
445 my $hdr = { 437 my $hdr = {
446 "Last-Modified" => time2str ((stat _)[9]), 438 "Last-Modified" => time2str ((stat _)[9]),
447 }; 439 };
448 440
449 my @code = (200, "ok"); 441 my @code = (200, "ok");
… …
461 } 453 }
462 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 454 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
463 } 455 }
464 $hdr->{"Content-Range"} = "bytes */$length"; 456 $hdr->{"Content-Range"} = "bytes */$length";
465 $hdr->{"Content-Length"} = $length; 457 $hdr->{"Content-Length"} = $length;
466 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
467 $self->err(416, "not satisfiable", $hdr, ""); 458 $self->err(416, "not satisfiable", $hdr, "");
468 459
469satisfiable: 460satisfiable:
470 # check for segmented downloads 461 # check for segmented downloads
471 if ($l && $::NO_SEGMENTED) { 462 if ($l && $::NO_SEGMENTED) {
472 my $delay = 60; 463 my $delay = $::PER_TIMEOUT + 15;
473 while (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 464 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
474 if ($delay <= 0) { 465 if ($delay <= 0) {
475 $self->err(400, "segmented downloads are not allowed", 466 $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 { 467 } else {
489 Coro::Event::do_timer(after => 3); $delay -= 3; 468 Coro::Event::do_timer(after => 4); $delay -= 4;
490 } 469 }
491 } 470 }
492 } 471 }
493 472
494 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 473 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
… …
505 $hdr->{"Content-Length"} = $length; 484 $hdr->{"Content-Length"} = $length;
506 485
507 $self->response(@code, $hdr, ""); 486 $self->response(@code, $hdr, "");
508 487
509 if ($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 $self->{fh}->writable or return;
505
510 my ($fh, $buf, $r); 506 my ($fh, $buf, $r);
511 my $current = $Coro::current; 507 my $current = $Coro::current;
512 open $fh, "<", $self->{path} 508 open $fh, "<", $self->{path}
513 or die "$self->{path}: late open failure ($!)"; 509 or die "$self->{path}: late open failure ($!)";
514 510
… …
540 or last; 536 or last;
541 $::written += $w; 537 $::written += $w;
542 $self->{written} += $w; 538 $self->{written} += $w;
543 $l += $r; 539 $l += $r;
544 } 540 }
545 }
546 541
547 close $fh; 542 close $fh;
543 }
548} 544}
549 545
5501; 5461;

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