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Comparing Coro/myhttpd/httpd.pl (file contents):
Revision 1.27 by root, Sun Aug 19 23:57:52 2001 UTC vs.
Revision 1.41 by root, Mon Sep 10 22:16:20 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;
… …
118 or $self->err(500, "unable to decode peername"); 150 or $self->err(500, "unable to decode peername");
119 151
120 $self->{remote_addr} = inet_ntoa $iaddr; 152 $self->{remote_addr} = inet_ntoa $iaddr;
121 $self->{time} = $::NOW; 153 $self->{time} = $::NOW;
122 154
123 # enter ourselves into various lists
124 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
125
126 $::conns++; 155 $::conns++;
127 156
128 $self; 157 $self;
129} 158}
130 159
131sub DESTROY { 160sub DESTROY {
132 my $self = shift; 161 my $self = shift;
133
134 $::conns--; 162 $::conns--;
135
136 $self->eoconn; 163 $self->eoconn;
137 delete $conn{$self->{remote_addr}}{$self*1};
138} 164}
139 165
140# end of connection 166# end of connection
141sub eoconn { 167sub eoconn {
142 my $self = shift; 168 my $self = shift;
169
170 # clean up hints
171 delete $conn{$self->{remote_id}}{$self*1};
143 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 172 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
144} 173}
145 174
146sub slog { 175sub slog {
147 my $self = shift; 176 my $self = shift;
148 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 177 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
149} 178}
150 179
151sub response { 180sub response {
152 my ($self, $code, $msg, $hdr, $content) = @_; 181 my ($self, $code, $msg, $hdr, $content) = @_;
153 my $res = "HTTP/1.1 $code $msg\015\012"; 182 my $res = "HTTP/1.1 $code $msg\015\012";
154 183
155 #$res .= "Connection: close\015\012"; 184 $self->{h}{connection} ||= $hdr->{Connection};
156 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 185
186 $res .= "Date: $HTTP_NOW\015\012";
157 187
158 while (my ($h, $v) = each %$hdr) { 188 while (my ($h, $v) = each %$hdr) {
159 $res .= "$h: $v\015\012" 189 $res .= "$h: $v\015\012"
160 } 190 }
161 $res .= "\015\012"; 191 $res .= "\015\012";
… …
174sub err { 204sub err {
175 my $self = shift; 205 my $self = shift;
176 my ($code, $msg, $hdr, $content) = @_; 206 my ($code, $msg, $hdr, $content) = @_;
177 207
178 unless (defined $content) { 208 unless (defined $content) {
179 $content = "$code $msg"; 209 $content = "$code $msg\n";
180 $hdr->{"Content-Type"} = "text/plain"; 210 $hdr->{"Content-Type"} = "text/plain";
181 $hdr->{"Content-Length"} = length $content; 211 $hdr->{"Content-Length"} = length $content;
182 } 212 }
183 $hdr->{"Connection"} = "close"; 213 $hdr->{"Connection"} = "close";
184 214
185 $self->response($code, $msg, $hdr, $content); 215 $self->response($code, $msg, $hdr, $content);
186 216
187 die bless {}, err::; 217 die bless {}, err::;
188} 218}
189 219
190sub err_blocked {
191 my $self = shift;
192 my $ip = $self->{remote_addr};
193 my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
194
195 Coro::Event::do_timer(after => 20*rand);
196
197 $self->err(401, "too many connections",
198 {
199 "Content-Type" => "text/html",
200 "Retry-After" => $::BLOCKTIME,
201 "Warning" => "Please do NOT retry, you have been blocked",
202 "WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
203 },
204 <<EOF);
205<html>
206<head>
207<title>Too many connections</title>
208</head>
209<body bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#000080" alink="#ff0000">
210
211<p>You have been blocked because you opened too many connections. You
212may retry at</p>
213
214 <p><blockquote>$time.</blockquote></p>
215
216<p>Until then, each new access will renew the block. You might want to have a
217look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>
218
219</body></html>
220EOF
221}
222
223sub handle { 220sub handle {
224 my $self = shift; 221 my $self = shift;
225 my $fh = $self->{fh}; 222 my $fh = $self->{fh};
223
224 my $host;
226 225
227 $fh->timeout($::REQ_TIMEOUT); 226 $fh->timeout($::REQ_TIMEOUT);
228 while() { 227 while() {
229 $self->{reqs}++; 228 $self->{reqs}++;
230 229
… …
240 } 239 }
241 240
242 $self->{h} = {}; 241 $self->{h} = {};
243 242
244 $fh->timeout($::RES_TIMEOUT); 243 $fh->timeout($::RES_TIMEOUT);
245 my $ip = $self->{remote_addr};
246
247 if ($blocked{$ip}) {
248 $self->err_blocked($blocked{$ip})
249 if $blocked{$ip} > $::NOW;
250
251 delete $blocked{$ip};
252 }
253
254 if (%{$conn{$ip}} > $::MAX_CONN_IP) {
255 $self->slog(2, "blocked ip $ip");
256 $self->err_blocked;
257 }
258 244
259 $req =~ /^(?:\015\012)? 245 $req =~ /^(?:\015\012)?
260 (GET|HEAD) \040+ 246 (GET|HEAD) \040+
261 ([^\040]+) \040+ 247 ([^\040]+) \040+
262 HTTP\/([0-9]+\.[0-9]+) 248 HTTP\/([0-9]+\.[0-9]+)
… …
287 273
288 $self->{h}{$h} = substr $v, 1 274 $self->{h}{$h} = substr $v, 1
289 while ($h, $v) = each %hdr; 275 while ($h, $v) = each %hdr;
290 } 276 }
291 277
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); $delay -= 4;
304 }
305 }
306 }
307
308 # find out server name and port
309 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
310 $host = $1;
311 } else {
312 $host = $self->{h}{host};
313 }
314
315 if (defined $host) {
292 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 316 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
317 } else {
318 ($self->{server_port}, $host)
319 = unpack_sockaddr_in $self->{fh}->getsockname
320 or $self->err(500, "unable to get socket name");
321 $host = inet_ntoa $host;
322 }
293 323
324 $self->{server_name} = $host;
325
326 # enter ourselves into various lists
327 weaken ($conn{$id}{$self*1} = $self);
294 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 328 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
295 329
296 eval { 330 eval {
297 $self->map_uri; 331 $self->map_uri;
298 $self->respond; 332 $self->respond;
299 }; 333 };
300 334
301 $self->eoconn; 335 $self->eoconn;
302 336
303 die if $@ && !ref $@; 337 die if $@ && !ref $@;
304 338
305 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 339 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
306 340
307 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
308 $fh->timeout($::PER_TIMEOUT); 341 $fh->timeout($::PER_TIMEOUT);
309 } 342 }
310} 343}
311 344
312# uri => path mapping 345# uri => path mapping
313sub map_uri { 346sub map_uri {
314 my $self = shift; 347 my $self = shift;
315 my $host = $self->{h}{host} || "default"; 348 my $host = $self->{server_name};
316 my $uri = $self->{uri}; 349 my $uri = $self->{uri};
317 350
318 # some massaging, also makes it more secure 351 # some massaging, also makes it more secure
319 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 352 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
320 $uri =~ s%//+%/%g; 353 $uri =~ s%//+%/%g;
… …
330 $self->{path} = "$::DOCROOT/$host$uri"; 363 $self->{path} = "$::DOCROOT/$host$uri";
331 364
332 $self->access_check; 365 $self->access_check;
333} 366}
334 367
335sub server_address {
336 my $self = shift;
337 my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
338 or $self->err(500, "unable to get socket name");
339 ((inet_ntoa $iaddr), $port);
340}
341
342sub server_host {
343 my $self = shift;
344 if (exists $self->{h}{host}) {
345 return $self->{h}{host};
346 } else {
347 return (($self->server_address)[0]);
348 }
349}
350
351sub server_hostport {
352 my $self = shift;
353 my ($host, $port);
354 if (exists $self->{h}{host}) {
355 ($host, $port) = ($self->{h}{host}, $self->{server_port});
356 } else {
357 ($host, $port) = $self->server_address;
358 }
359 $port = $port == 80 ? "" : ":$port";
360 $host.$port;
361}
362
363sub _cgi { 368sub _cgi {
364 my $self = shift; 369 my $self = shift;
365 my $path = shift; 370 my $path = shift;
366 my $fh; 371 my $fh;
367 372
368 # no two-way xxx supported 373 # no two-way xxx supported
369 if (0 == fork) { 374 if (0 == fork) {
370 open STDOUT, ">&".fileno($self->{fh}); 375 open STDOUT, ">&".fileno($self->{fh});
371 if (chdir $::DOCROOT) { 376 if (chdir $::DOCROOT) {
372 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 377 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
373 $ENV{HTTP_HOST} = $self->server_host; 378 $ENV{HTTP_HOST} = $self->{server_name};
374 $ENV{HTTP_PORT} = $self->{server_host}; 379 $ENV{HTTP_PORT} = $self->{server_port};
375 $ENV{SCRIPT_NAME} = $self->{name}; 380 $ENV{SCRIPT_NAME} = $self->{name};
376 exec $path; 381 exec $path;
377 } 382 }
378 Coro::State::_exit(0); 383 Coro::State::_exit(0);
379 } else { 384 } else {
385 die;
380 } 386 }
387}
388
389sub server_hostport {
390 $_[0]{server_port} == 80
391 ? $_[0]{server_name}
392 : "$_[0]{server_name}:$_[0]{server_port}";
381} 393}
382 394
383sub respond { 395sub respond {
384 my $self = shift; 396 my $self = shift;
385 my $path = $self->{path}; 397 my $path = $self->{path};
… …
395 407
396 if (-d _ && -r _) { 408 if (-d _ && -r _) {
397 # directory 409 # directory
398 if ($path !~ /\/$/) { 410 if ($path !~ /\/$/) {
399 # create a redirect to get the trailing "/" 411 # create a redirect to get the trailing "/"
400 my $host = $self->server_hostport; 412 # we don't try to avoid the :80
401 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 413 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
402 } else { 414 } else {
403 $ims < $self->{stat}[9] 415 $ims < $self->{stat}[9]
404 or $self->err(304, "not modified"); 416 or $self->err(304, "not modified");
405 417
406 if (-r "$path/index.html") { 418 if (-r "$path/index.html") {
… …
430 $idx); 442 $idx);
431} 443}
432 444
433sub handle_file { 445sub handle_file {
434 my $self = shift; 446 my $self = shift;
435 my $length = -s _; 447 my $length = $self->{stat}[7];
448 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
436 my $hdr = { 449 my $hdr = {
437 "Last-Modified" => time2str ((stat _)[9]), 450 "Last-Modified" => time2str ((stat _)[9]),
438 }; 451 };
439 452
440 my @code = (200, "ok"); 453 my @code = (200, "ok");
… …
452 } 465 }
453 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 466 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
454 } 467 }
455 $hdr->{"Content-Range"} = "bytes */$length"; 468 $hdr->{"Content-Range"} = "bytes */$length";
456 $hdr->{"Content-Length"} = $length; 469 $hdr->{"Content-Length"} = $length;
457 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
458 $self->err(416, "not satisfiable", $hdr, ""); 470 $self->err(416, "not satisfiable", $hdr, "");
459 471
460satisfiable: 472satisfiable:
461 # check for segmented downloads 473 # check for segmented downloads
462 if ($l && $::NO_SEGMENTED) { 474 if ($l && $::NO_SEGMENTED) {
475 my $delay = $::PER_TIMEOUT + 15;
463 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 476 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
464 $self->err(400, "segmented downloads are not allowed"); 477 if ($delay <= 0) {
478 $self->err_segmented_download;
479 } else {
480 Coro::Event::do_timer(after => 4); $delay -= 4;
481 }
465 } 482 }
466 } 483 }
467 484
468 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 485 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
469 @code = (206, "partial content"); 486 @code = (206, "partial content");
… …
479 $hdr->{"Content-Length"} = $length; 496 $hdr->{"Content-Length"} = $length;
480 497
481 $self->response(@code, $hdr, ""); 498 $self->response(@code, $hdr, "");
482 499
483 if ($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 $self->{fh}->writable or return;
517
484 my ($fh, $buf, $r); 518 my ($fh, $buf, $r);
485 my $current = $Coro::current; 519 my $current = $Coro::current;
486 open $fh, "<", $self->{path} 520 open $fh, "<", $self->{path}
487 or die "$self->{path}: late open failure ($!)"; 521 or die "$self->{path}: late open failure ($!)";
488 522
… …
500 or last; 534 or last;
501 } else { 535 } else {
502 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 536 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
503 $buf, 0, sub { 537 $buf, 0, sub {
504 $r = $_[0]; 538 $r = $_[0];
505 $current->ready; 539 Coro::ready($current);
506 }); 540 });
507 &Coro::schedule; 541 &Coro::schedule;
508 last unless $r; 542 last unless $r;
509 } 543 }
510 my $w = $self->{fh}->syswrite($buf) 544 my $w = syswrite $self->{fh}, $buf
511 or last; 545 or last;
512 $::written += $w; 546 $::written += $w;
513 $self->{written} += $w; 547 $self->{written} += $w;
514 $l += $r; 548 $l += $r;
515 } 549 }
516 }
517 550
518 close $fh; 551 close $fh;
552 }
519} 553}
520 554
5211; 5551;

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