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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 1.44 by root, Fri Sep 14 12:38:18 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;
… …
109 143
110read_mimetypes; 144read_mimetypes;
111 145
112sub new { 146sub new {
113 my $class = shift; 147 my $class = shift;
148 my $fh = shift;
114 my $peername = shift; 149 my $peername = shift;
115 my $fh = shift;
116 my $self = bless { fh => $fh }, $class; 150 my $self = bless { fh => $fh }, $class;
117 my (undef, $iaddr) = unpack_sockaddr_in $peername 151 my (undef, $iaddr) = unpack_sockaddr_in $peername
118 or $self->err(500, "unable to decode peername"); 152 or $self->err(500, "unable to decode peername");
119 153
120 $self->{remote_addr} = inet_ntoa $iaddr; 154 $self->{remote_addr} = inet_ntoa $iaddr;
121 $self->{time} = $::NOW; 155 $self->{time} = $::NOW;
122 156
123 # enter ourselves into various lists
124 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
125
126 $::conns++; 157 $::conns++;
127 158
128 $self; 159 $self;
129} 160}
130 161
131sub DESTROY { 162sub DESTROY {
132 my $self = shift; 163 my $self = shift;
133
134 $::conns--; 164 $::conns--;
135
136 $self->eoconn; 165 $self->eoconn;
137 delete $conn{$self->{remote_addr}}{$self*1};
138} 166}
139 167
140# end of connection 168# end of connection
141sub eoconn { 169sub eoconn {
142 my $self = shift; 170 my $self = shift;
171
172 # clean up hints
173 delete $conn{$self->{remote_id}}{$self*1};
143 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 174 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
175
176 $httpevent->broadcast;
144} 177}
145 178
146sub slog { 179sub slog {
147 my $self = shift; 180 my $self = shift;
148 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 181 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
149} 182}
150 183
151sub response { 184sub response {
152 my ($self, $code, $msg, $hdr, $content) = @_; 185 my ($self, $code, $msg, $hdr, $content) = @_;
153 my $res = "HTTP/1.1 $code $msg\015\012"; 186 my $res = "HTTP/1.1 $code $msg\015\012";
154 187
155 $self->{h}{connection} ||= $hdr->{Connection}; 188 $self->{h}{connection} = "close" if $hdr->{Connection} =~ /close/;
156 189
157 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 190 $res .= "Date: $HTTP_NOW\015\012";
158 191
159 while (my ($h, $v) = each %$hdr) { 192 while (my ($h, $v) = each %$hdr) {
160 $res .= "$h: $v\015\012" 193 $res .= "$h: $v\015\012"
161 } 194 }
162 $res .= "\015\012"; 195 $res .= "\015\012";
… …
175sub err { 208sub err {
176 my $self = shift; 209 my $self = shift;
177 my ($code, $msg, $hdr, $content) = @_; 210 my ($code, $msg, $hdr, $content) = @_;
178 211
179 unless (defined $content) { 212 unless (defined $content) {
180 $content = "$code $msg"; 213 $content = "$code $msg\n";
181 $hdr->{"Content-Type"} = "text/plain"; 214 $hdr->{"Content-Type"} = "text/plain";
182 $hdr->{"Content-Length"} = length $content; 215 $hdr->{"Content-Length"} = length $content;
183 } 216 }
184 $hdr->{"Connection"} = "close"; 217 $hdr->{"Connection"} = "close";
185 218
186 $self->response($code, $msg, $hdr, $content); 219 $self->response($code, $msg, $hdr, $content);
187 220
188 die bless {}, err::; 221 die bless {}, err::;
189} 222}
190 223
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 { 224sub handle {
226 my $self = shift; 225 my $self = shift;
227 my $fh = $self->{fh}; 226 my $fh = $self->{fh};
227
228 my $host;
228 229
229 $fh->timeout($::REQ_TIMEOUT); 230 $fh->timeout($::REQ_TIMEOUT);
230 while() { 231 while() {
231 $self->{reqs}++; 232 $self->{reqs}++;
232 233
… …
242 } 243 }
243 244
244 $self->{h} = {}; 245 $self->{h} = {};
245 246
246 $fh->timeout($::RES_TIMEOUT); 247 $fh->timeout($::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 }
260 248
261 $req =~ /^(?:\015\012)? 249 $req =~ /^(?:\015\012)?
262 (GET|HEAD) \040+ 250 (GET|HEAD) \040+
263 ([^\040]+) \040+ 251 ([^\040]+) \040+
264 HTTP\/([0-9]+\.[0-9]+) 252 HTTP\/([0-9]+\.[0-9]+)
… …
289 277
290 $self->{h}{$h} = substr $v, 1 278 $self->{h}{$h} = substr $v, 1
291 while ($h, $v) = each %hdr; 279 while ($h, $v) = each %hdr;
292 } 280 }
293 281
282 # remote id should be unique per user
283 my $id = $self->{remote_addr};
284
285 if (exists $self->{h}{"client-ip"}) {
286 $id .= "[".$self->{h}{"client-ip"}."]";
287 } elsif (exists $self->{h}{"x-forwarded-for"}) {
288 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
289 }
290
291 $self->{remote_id} = $id;
292
293 if ($blocked{$id}) {
294 $self->err_blocked($blocked{$id})
295 if $blocked{$id} > $::NOW;
296
297 delete $blocked{$id};
298 }
299
300 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
301 my $delay = $::PER_TIMEOUT + $::NOW + 15;
302 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
303 if ($delay < $::NOW) {
304 $self->slog(2, "blocked ip $id");
305 $self->err_blocked;
306 } else {
307 $httpevent->wait;
308 }
309 }
310 }
311
312 # find out server name and port
313 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
314 $host = $1;
315 } else {
316 $host = $self->{h}{host};
317 }
318
319 if (defined $host) {
294 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 320 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
321 } else {
322 ($self->{server_port}, $host)
323 = unpack_sockaddr_in $self->{fh}->sockname
324 or $self->err(500, "unable to get socket name");
325 $host = inet_ntoa $host;
326 }
295 327
328 $self->{server_name} = $host;
329
330 # enter ourselves into various lists
331 weaken ($conn{$id}{$self*1} = $self);
296 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 332 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
297 333
298 eval { 334 eval {
299 $self->map_uri; 335 $self->map_uri;
300 $self->respond; 336 $self->respond;
301 }; 337 };
302 338
303 $self->eoconn; 339 $self->eoconn;
304 340
305 die if $@ && !ref $@; 341 die if $@ && !ref $@;
306 342
307 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 343 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
308 344
309 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]"); 345 $httpevent->broadcast;
346
310 $fh->timeout($::PER_TIMEOUT); 347 $fh->timeout($::PER_TIMEOUT);
311 } 348 }
312} 349}
313 350
314# uri => path mapping 351# uri => path mapping
315sub map_uri { 352sub map_uri {
316 my $self = shift; 353 my $self = shift;
317 my $host = $self->{h}{host} || "default"; 354 my $host = $self->{server_name};
318 my $uri = $self->{uri}; 355 my $uri = $self->{uri};
319 356
320 # some massaging, also makes it more secure 357 # some massaging, also makes it more secure
321 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 358 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
322 $uri =~ s%//+%/%g; 359 $uri =~ s%//+%/%g;
… …
332 $self->{path} = "$::DOCROOT/$host$uri"; 369 $self->{path} = "$::DOCROOT/$host$uri";
333 370
334 $self->access_check; 371 $self->access_check;
335} 372}
336 373
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 { 374sub _cgi {
366 my $self = shift; 375 my $self = shift;
367 my $path = shift; 376 my $path = shift;
368 my $fh; 377 my $fh;
369 378
370 # no two-way xxx supported 379 # no two-way xxx supported
371 if (0 == fork) { 380 if (0 == fork) {
372 open STDOUT, ">&".fileno($self->{fh}); 381 open STDOUT, ">&".fileno($self->{fh});
373 if (chdir $::DOCROOT) { 382 if (chdir $::DOCROOT) {
374 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 383 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
375 $ENV{HTTP_HOST} = $self->server_host; 384 $ENV{HTTP_HOST} = $self->{server_name};
376 $ENV{HTTP_PORT} = $self->{server_host}; 385 $ENV{HTTP_PORT} = $self->{server_port};
377 $ENV{SCRIPT_NAME} = $self->{name}; 386 $ENV{SCRIPT_NAME} = $self->{name};
378 exec $path; 387 exec $path;
379 } 388 }
380 Coro::State::_exit(0); 389 Coro::State::_exit(0);
381 } else { 390 } else {
391 die;
382 } 392 }
393}
394
395sub server_hostport {
396 $_[0]{server_port} == 80
397 ? $_[0]{server_name}
398 : "$_[0]{server_name}:$_[0]{server_port}";
383} 399}
384 400
385sub respond { 401sub respond {
386 my $self = shift; 402 my $self = shift;
387 my $path = $self->{path}; 403 my $path = $self->{path};
… …
397 413
398 if (-d _ && -r _) { 414 if (-d _ && -r _) {
399 # directory 415 # directory
400 if ($path !~ /\/$/) { 416 if ($path !~ /\/$/) {
401 # create a redirect to get the trailing "/" 417 # create a redirect to get the trailing "/"
402 my $host = $self->server_hostport; 418 # we don't try to avoid the :80
403 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 419 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
404 } else { 420 } else {
405 $ims < $self->{stat}[9] 421 $ims < $self->{stat}[9]
406 or $self->err(304, "not modified"); 422 or $self->err(304, "not modified");
407 423
408 if (-r "$path/index.html") { 424 if (-r "$path/index.html") {
… …
432 $idx); 448 $idx);
433} 449}
434 450
435sub handle_file { 451sub handle_file {
436 my $self = shift; 452 my $self = shift;
437 my $length = -s _; 453 my $length = $self->{stat}[7];
454 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
438 my $hdr = { 455 my $hdr = {
439 "Last-Modified" => time2str ((stat _)[9]), 456 "Last-Modified" => time2str ((stat _)[9]),
440 }; 457 };
441 458
442 my @code = (200, "ok"); 459 my @code = (200, "ok");
… …
454 } 471 }
455 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 472 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
456 } 473 }
457 $hdr->{"Content-Range"} = "bytes */$length"; 474 $hdr->{"Content-Range"} = "bytes */$length";
458 $hdr->{"Content-Length"} = $length; 475 $hdr->{"Content-Length"} = $length;
459 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
460 $self->err(416, "not satisfiable", $hdr, ""); 476 $self->err(416, "not satisfiable", $hdr, "");
461 477
462satisfiable: 478satisfiable:
463 # check for segmented downloads 479 # check for segmented downloads
464 if ($l && $::NO_SEGMENTED) { 480 if ($l && $::NO_SEGMENTED) {
481 my $delay = $::NOW + $::PER_TIMEOUT + 15;
465 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 482 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
466 $self->err(400, "segmented downloads are not allowed", 483 if ($delay <= $::NOW) {
467 { "Content-Type" => "text/html", Connection => "close" }, <<EOF); 484 $self->err_segmented_download;
468<html> 485 } else {
469<head> 486 $httpevent->broadcast;
470<title>Segmented downloads are not allowed</title> 487 }
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 } 488 }
481 } 489 }
482 490
483 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 491 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
484 @code = (206, "partial content"); 492 @code = (206, "partial content");
… …
494 $hdr->{"Content-Length"} = $length; 502 $hdr->{"Content-Length"} = $length;
495 503
496 $self->response(@code, $hdr, ""); 504 $self->response(@code, $hdr, "");
497 505
498 if ($self->{method} eq "GET") { 506 if ($self->{method} eq "GET") {
507 $self->{time} = $::NOW;
508
509 my $fudge = $queue->[0]->waiters;
510 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
511
512 $queue->[1] *= $fudge;
513 my $transfer = $queue->[0]->guard;
514
515 if ($fudge != 1) {
516 $queue->[1] /= $fudge;
517 $queue->[1] = $queue->[1] * $::wait_factor
518 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
519 }
520 $self->{time} = $::NOW;
521
522 $self->{fh}->writable or return;
523
499 my ($fh, $buf, $r); 524 my ($fh, $buf, $r);
500 my $current = $Coro::current; 525 my $current = $Coro::current;
501 open $fh, "<", $self->{path} 526 open $fh, "<", $self->{path}
502 or die "$self->{path}: late open failure ($!)"; 527 or die "$self->{path}: late open failure ($!)";
503 528
… …
515 or last; 540 or last;
516 } else { 541 } else {
517 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 542 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
518 $buf, 0, sub { 543 $buf, 0, sub {
519 $r = $_[0]; 544 $r = $_[0];
520 $current->ready; 545 Coro::ready($current);
521 }); 546 });
522 &Coro::schedule; 547 &Coro::schedule;
523 last unless $r; 548 last unless $r;
524 } 549 }
525 my $w = $self->{fh}->syswrite($buf) 550 my $w = syswrite $self->{fh}, $buf
526 or last; 551 or last;
527 $::written += $w; 552 $::written += $w;
528 $self->{written} += $w; 553 $self->{written} += $w;
529 $l += $r; 554 $l += $r;
530 } 555 }
531 }
532 556
533 close $fh; 557 close $fh;
558 }
534} 559}
535 560
5361; 5611;

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