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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 1.46 by root, Sat Nov 17 04:15:23 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 $msg\015\012";
154 187
155 #$res .= "Connection: close\015\012"; 188 if (exists $hdr->{Connection}) {
156 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 189 if ($hdr->{Connection} =~ /close/) {
190 $self->{h}{connection} = "close"
191 }
192 } else {
193 if ($self->{version} < 1.1) {
194 if ($self->{h}{connection} =~ /keep-alive/i) {
195 $hdr->{Connection} = "Keep-Alive";
196 } else {
197 $self->{h}{connection} = "close"
198 }
199 }
200 }
201
202 $res .= "Date: $HTTP_NOW\015\012";
157 203
158 while (my ($h, $v) = each %$hdr) { 204 while (my ($h, $v) = each %$hdr) {
159 $res .= "$h: $v\015\012" 205 $res .= "$h: $v\015\012"
160 } 206 }
161 $res .= "\015\012"; 207 $res .= "\015\012";
… …
174sub err { 220sub err {
175 my $self = shift; 221 my $self = shift;
176 my ($code, $msg, $hdr, $content) = @_; 222 my ($code, $msg, $hdr, $content) = @_;
177 223
178 unless (defined $content) { 224 unless (defined $content) {
179 $content = "$code $msg"; 225 $content = "$code $msg\n";
180 $hdr->{"Content-Type"} = "text/plain"; 226 $hdr->{"Content-Type"} = "text/plain";
181 $hdr->{"Content-Length"} = length $content; 227 $hdr->{"Content-Length"} = length $content;
182 } 228 }
183 $hdr->{"Connection"} = "close"; 229 $hdr->{"Connection"} = "close";
184 230
185 $self->response($code, $msg, $hdr, $content); 231 $self->response($code, $msg, $hdr, $content);
186 232
187 die bless {}, err::; 233 die bless {}, err::;
188} 234}
189 235
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 { 236sub handle {
224 my $self = shift; 237 my $self = shift;
225 my $fh = $self->{fh}; 238 my $fh = $self->{fh};
239
240 my $host;
226 241
227 $fh->timeout($::REQ_TIMEOUT); 242 $fh->timeout($::REQ_TIMEOUT);
228 while() { 243 while() {
229 $self->{reqs}++; 244 $self->{reqs}++;
230 245
… …
240 } 255 }
241 256
242 $self->{h} = {}; 257 $self->{h} = {};
243 258
244 $fh->timeout($::RES_TIMEOUT); 259 $fh->timeout($::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 }
258 260
259 $req =~ /^(?:\015\012)? 261 $req =~ /^(?:\015\012)?
260 (GET|HEAD) \040+ 262 (GET|HEAD) \040+
261 ([^\040]+) \040+ 263 ([^\040]+) \040+
262 HTTP\/([0-9]+\.[0-9]+) 264 HTTP\/([0-9]+\.[0-9]+)
… …
287 289
288 $self->{h}{$h} = substr $v, 1 290 $self->{h}{$h} = substr $v, 1
289 while ($h, $v) = each %hdr; 291 while ($h, $v) = each %hdr;
290 } 292 }
291 293
294 # remote id should be unique per user
295 my $id = $self->{remote_addr};
296
297 if (exists $self->{h}{"client-ip"}) {
298 $id .= "[".$self->{h}{"client-ip"}."]";
299 } elsif (exists $self->{h}{"x-forwarded-for"}) {
300 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
301 }
302
303 $self->{remote_id} = $id;
304
305 if ($blocked{$id}) {
306 $self->err_blocked($blocked{$id})
307 if $blocked{$id} > $::NOW;
308
309 delete $blocked{$id};
310 }
311
312 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
313 my $delay = $::PER_TIMEOUT + $::NOW + 15;
314 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
315 if ($delay < $::NOW) {
316 $self->slog(2, "blocked ip $id");
317 $self->err_blocked;
318 } else {
319 $httpevent->wait;
320 }
321 }
322 }
323
324 # find out server name and port
325 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
326 $host = $1;
327 } else {
328 $host = $self->{h}{host};
329 }
330
331 if (defined $host) {
292 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 332 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
333 } else {
334 ($self->{server_port}, $host)
335 = unpack_sockaddr_in $self->{fh}->sockname
336 or $self->err(500, "unable to get socket name");
337 $host = inet_ntoa $host;
338 }
293 339
340 $self->{server_name} = $host;
341
342 # enter ourselves into various lists
343 weaken ($conn{$id}{$self*1} = $self);
294 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 344 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
295 345
296 eval { 346 eval {
297 $self->map_uri; 347 $self->map_uri;
298 $self->respond; 348 $self->respond;
299 }; 349 };
300 350
301 $self->eoconn; 351 $self->eoconn;
302 352
303 die if $@ && !ref $@; 353 die if $@ && !ref $@;
304 354
305 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 355 last if $self->{h}{connection} =~ /close/;
306 356
307 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]"); 357 $httpevent->broadcast;
358
308 $fh->timeout($::PER_TIMEOUT); 359 $fh->timeout($::PER_TIMEOUT);
309 } 360 }
310} 361}
311 362
312# uri => path mapping 363# uri => path mapping
313sub map_uri { 364sub map_uri {
314 my $self = shift; 365 my $self = shift;
315 my $host = $self->{h}{host} || "default"; 366 my $host = $self->{server_name};
316 my $uri = $self->{uri}; 367 my $uri = $self->{uri};
317 368
318 # some massaging, also makes it more secure 369 # some massaging, also makes it more secure
319 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 370 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
320 $uri =~ s%//+%/%g; 371 $uri =~ s%//+%/%g;
… …
330 $self->{path} = "$::DOCROOT/$host$uri"; 381 $self->{path} = "$::DOCROOT/$host$uri";
331 382
332 $self->access_check; 383 $self->access_check;
333} 384}
334 385
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 { 386sub _cgi {
364 my $self = shift; 387 my $self = shift;
365 my $path = shift; 388 my $path = shift;
366 my $fh; 389 my $fh;
367 390
368 # no two-way xxx supported 391 # no two-way xxx supported
369 if (0 == fork) { 392 if (0 == fork) {
370 open STDOUT, ">&".fileno($self->{fh}); 393 open STDOUT, ">&".fileno($self->{fh});
371 if (chdir $::DOCROOT) { 394 if (chdir $::DOCROOT) {
372 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 395 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
373 $ENV{HTTP_HOST} = $self->server_host; 396 $ENV{HTTP_HOST} = $self->{server_name};
374 $ENV{HTTP_PORT} = $self->{server_host}; 397 $ENV{HTTP_PORT} = $self->{server_port};
375 $ENV{SCRIPT_NAME} = $self->{name}; 398 $ENV{SCRIPT_NAME} = $self->{name};
376 exec $path; 399 exec $path;
377 } 400 }
378 Coro::State::_exit(0); 401 Coro::State::_exit(0);
379 } else { 402 } else {
403 die;
380 } 404 }
405}
406
407sub server_hostport {
408 $_[0]{server_port} == 80
409 ? $_[0]{server_name}
410 : "$_[0]{server_name}:$_[0]{server_port}";
381} 411}
382 412
383sub respond { 413sub respond {
384 my $self = shift; 414 my $self = shift;
385 my $path = $self->{path}; 415 my $path = $self->{path};
… …
395 425
396 if (-d _ && -r _) { 426 if (-d _ && -r _) {
397 # directory 427 # directory
398 if ($path !~ /\/$/) { 428 if ($path !~ /\/$/) {
399 # create a redirect to get the trailing "/" 429 # create a redirect to get the trailing "/"
400 my $host = $self->server_hostport; 430 # we don't try to avoid the :80
401 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 431 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
402 } else { 432 } else {
403 $ims < $self->{stat}[9] 433 $ims < $self->{stat}[9]
404 or $self->err(304, "not modified"); 434 or $self->err(304, "not modified");
405 435
406 if (-r "$path/index.html") { 436 if (-r "$path/index.html") {
407 $self->{path} .= "/index.html"; 437 # replace directory "size" by index.html filesize
438 $self->{stat}[7] = (stat ($self->{path} .= "/index.html"))[7];
408 $self->handle_file; 439 $self->handle_file;
409 } else { 440 } else {
410 $self->handle_dir; 441 $self->handle_dir;
411 } 442 }
412 } 443 }
… …
430 $idx); 461 $idx);
431} 462}
432 463
433sub handle_file { 464sub handle_file {
434 my $self = shift; 465 my $self = shift;
435 my $length = -s _; 466 my $length = $self->{stat}[7];
467 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
436 my $hdr = { 468 my $hdr = {
437 "Last-Modified" => time2str ((stat _)[9]), 469 "Last-Modified" => time2str ((stat _)[9]),
438 }; 470 };
439 471
440 my @code = (200, "ok"); 472 my @code = (200, "ok");
… …
452 } 484 }
453 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 485 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
454 } 486 }
455 $hdr->{"Content-Range"} = "bytes */$length"; 487 $hdr->{"Content-Range"} = "bytes */$length";
456 $hdr->{"Content-Length"} = $length; 488 $hdr->{"Content-Length"} = $length;
457 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
458 $self->err(416, "not satisfiable", $hdr, ""); 489 $self->err(416, "not satisfiable", $hdr, "");
459 490
460satisfiable: 491satisfiable:
461 # check for segmented downloads 492 # check for segmented downloads
462 if ($l && $::NO_SEGMENTED) { 493 if ($l && $::NO_SEGMENTED) {
494 my $delay = $::NOW + $::PER_TIMEOUT + 15;
463 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 495 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
464 $self->err(400, "segmented downloads are not allowed"); 496 if ($delay <= $::NOW) {
497 $self->err_segmented_download;
498 } else {
499 $httpevent->wait;
500 }
465 } 501 }
466 } 502 }
467 503
468 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 504 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
469 @code = (206, "partial content"); 505 @code = (206, "partial content");
… …
479 $hdr->{"Content-Length"} = $length; 515 $hdr->{"Content-Length"} = $length;
480 516
481 $self->response(@code, $hdr, ""); 517 $self->response(@code, $hdr, "");
482 518
483 if ($self->{method} eq "GET") { 519 if ($self->{method} eq "GET") {
520 $self->{time} = $::NOW;
521
522 my $fudge = $queue->[0]->waiters;
523 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
524
525 $queue->[1] *= $fudge;
526 my $transfer = $queue->[0]->guard;
527
528 if ($fudge != 1) {
529 $queue->[1] /= $fudge;
530 $queue->[1] = $queue->[1] * $::wait_factor
531 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
532 }
533 $self->{time} = $::NOW;
534
535 $self->{fh}->writable or return;
536
484 my ($fh, $buf, $r); 537 my ($fh, $buf, $r);
485 my $current = $Coro::current; 538 my $current = $Coro::current;
486 open $fh, "<", $self->{path} 539 open $fh, "<", $self->{path}
487 or die "$self->{path}: late open failure ($!)"; 540 or die "$self->{path}: late open failure ($!)";
488 541
… …
500 or last; 553 or last;
501 } else { 554 } else {
502 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 555 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
503 $buf, 0, sub { 556 $buf, 0, sub {
504 $r = $_[0]; 557 $r = $_[0];
505 $current->ready; 558 Coro::ready($current);
506 }); 559 });
507 &Coro::schedule; 560 &Coro::schedule;
508 last unless $r; 561 last unless $r;
509 } 562 }
510 my $w = $self->{fh}->syswrite($buf) 563 my $w = syswrite $self->{fh}, $buf
511 or last; 564 or last;
512 $::written += $w; 565 $::written += $w;
513 $self->{written} += $w; 566 $self->{written} += $w;
514 $l += $r; 567 $l += $r;
515 } 568 }
516 }
517 569
518 close $fh; 570 close $fh;
571 }
519} 572}
520 573
5211; 5741;

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