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Comparing cvsroot/Coro/myhttpd/httpd.pl (file contents):
Revision 1.27 by root, Sun Aug 19 23:57:52 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 $msg\015\012";
154 187
155 #$res .= "Connection: close\015\012"; 188 $self->{h}{connection} = "close" if $hdr->{Connection} =~ /close/;
156 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 189
190 $res .= "Date: $HTTP_NOW\015\012";
157 191
158 while (my ($h, $v) = each %$hdr) { 192 while (my ($h, $v) = each %$hdr) {
159 $res .= "$h: $v\015\012" 193 $res .= "$h: $v\015\012"
160 } 194 }
161 $res .= "\015\012"; 195 $res .= "\015\012";
… …
174sub err { 208sub err {
175 my $self = shift; 209 my $self = shift;
176 my ($code, $msg, $hdr, $content) = @_; 210 my ($code, $msg, $hdr, $content) = @_;
177 211
178 unless (defined $content) { 212 unless (defined $content) {
179 $content = "$code $msg"; 213 $content = "$code $msg\n";
180 $hdr->{"Content-Type"} = "text/plain"; 214 $hdr->{"Content-Type"} = "text/plain";
181 $hdr->{"Content-Length"} = length $content; 215 $hdr->{"Content-Length"} = length $content;
182 } 216 }
183 $hdr->{"Connection"} = "close"; 217 $hdr->{"Connection"} = "close";
184 218
185 $self->response($code, $msg, $hdr, $content); 219 $self->response($code, $msg, $hdr, $content);
186 220
187 die bless {}, err::; 221 die bless {}, err::;
188} 222}
189 223
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 { 224sub handle {
224 my $self = shift; 225 my $self = shift;
225 my $fh = $self->{fh}; 226 my $fh = $self->{fh};
227
228 my $host;
226 229
227 $fh->timeout($::REQ_TIMEOUT); 230 $fh->timeout($::REQ_TIMEOUT);
228 while() { 231 while() {
229 $self->{reqs}++; 232 $self->{reqs}++;
230 233
… …
240 } 243 }
241 244
242 $self->{h} = {}; 245 $self->{h} = {};
243 246
244 $fh->timeout($::RES_TIMEOUT); 247 $fh->timeout($::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 }
258 248
259 $req =~ /^(?:\015\012)? 249 $req =~ /^(?:\015\012)?
260 (GET|HEAD) \040+ 250 (GET|HEAD) \040+
261 ([^\040]+) \040+ 251 ([^\040]+) \040+
262 HTTP\/([0-9]+\.[0-9]+) 252 HTTP\/([0-9]+\.[0-9]+)
… …
287 277
288 $self->{h}{$h} = substr $v, 1 278 $self->{h}{$h} = substr $v, 1
289 while ($h, $v) = each %hdr; 279 while ($h, $v) = each %hdr;
290 } 280 }
291 281
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) {
292 $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 }
293 327
328 $self->{server_name} = $host;
329
330 # enter ourselves into various lists
331 weaken ($conn{$id}{$self*1} = $self);
294 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 332 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
295 333
296 eval { 334 eval {
297 $self->map_uri; 335 $self->map_uri;
298 $self->respond; 336 $self->respond;
299 }; 337 };
300 338
301 $self->eoconn; 339 $self->eoconn;
302 340
303 die if $@ && !ref $@; 341 die if $@ && !ref $@;
304 342
305 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 343 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
306 344
307 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]"); 345 $httpevent->broadcast;
346
308 $fh->timeout($::PER_TIMEOUT); 347 $fh->timeout($::PER_TIMEOUT);
309 } 348 }
310} 349}
311 350
312# uri => path mapping 351# uri => path mapping
313sub map_uri { 352sub map_uri {
314 my $self = shift; 353 my $self = shift;
315 my $host = $self->{h}{host} || "default"; 354 my $host = $self->{server_name};
316 my $uri = $self->{uri}; 355 my $uri = $self->{uri};
317 356
318 # some massaging, also makes it more secure 357 # some massaging, also makes it more secure
319 $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;
320 $uri =~ s%//+%/%g; 359 $uri =~ s%//+%/%g;
… …
330 $self->{path} = "$::DOCROOT/$host$uri"; 369 $self->{path} = "$::DOCROOT/$host$uri";
331 370
332 $self->access_check; 371 $self->access_check;
333} 372}
334 373
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 { 374sub _cgi {
364 my $self = shift; 375 my $self = shift;
365 my $path = shift; 376 my $path = shift;
366 my $fh; 377 my $fh;
367 378
368 # no two-way xxx supported 379 # no two-way xxx supported
369 if (0 == fork) { 380 if (0 == fork) {
370 open STDOUT, ">&".fileno($self->{fh}); 381 open STDOUT, ">&".fileno($self->{fh});
371 if (chdir $::DOCROOT) { 382 if (chdir $::DOCROOT) {
372 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 383 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
373 $ENV{HTTP_HOST} = $self->server_host; 384 $ENV{HTTP_HOST} = $self->{server_name};
374 $ENV{HTTP_PORT} = $self->{server_host}; 385 $ENV{HTTP_PORT} = $self->{server_port};
375 $ENV{SCRIPT_NAME} = $self->{name}; 386 $ENV{SCRIPT_NAME} = $self->{name};
376 exec $path; 387 exec $path;
377 } 388 }
378 Coro::State::_exit(0); 389 Coro::State::_exit(0);
379 } else { 390 } else {
391 die;
380 } 392 }
393}
394
395sub server_hostport {
396 $_[0]{server_port} == 80
397 ? $_[0]{server_name}
398 : "$_[0]{server_name}:$_[0]{server_port}";
381} 399}
382 400
383sub respond { 401sub respond {
384 my $self = shift; 402 my $self = shift;
385 my $path = $self->{path}; 403 my $path = $self->{path};
… …
395 413
396 if (-d _ && -r _) { 414 if (-d _ && -r _) {
397 # directory 415 # directory
398 if ($path !~ /\/$/) { 416 if ($path !~ /\/$/) {
399 # create a redirect to get the trailing "/" 417 # create a redirect to get the trailing "/"
400 my $host = $self->server_hostport; 418 # we don't try to avoid the :80
401 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 419 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
402 } else { 420 } else {
403 $ims < $self->{stat}[9] 421 $ims < $self->{stat}[9]
404 or $self->err(304, "not modified"); 422 or $self->err(304, "not modified");
405 423
406 if (-r "$path/index.html") { 424 if (-r "$path/index.html") {
… …
430 $idx); 448 $idx);
431} 449}
432 450
433sub handle_file { 451sub handle_file {
434 my $self = shift; 452 my $self = shift;
435 my $length = -s _; 453 my $length = $self->{stat}[7];
454 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
436 my $hdr = { 455 my $hdr = {
437 "Last-Modified" => time2str ((stat _)[9]), 456 "Last-Modified" => time2str ((stat _)[9]),
438 }; 457 };
439 458
440 my @code = (200, "ok"); 459 my @code = (200, "ok");
… …
452 } 471 }
453 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 472 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
454 } 473 }
455 $hdr->{"Content-Range"} = "bytes */$length"; 474 $hdr->{"Content-Range"} = "bytes */$length";
456 $hdr->{"Content-Length"} = $length; 475 $hdr->{"Content-Length"} = $length;
457 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
458 $self->err(416, "not satisfiable", $hdr, ""); 476 $self->err(416, "not satisfiable", $hdr, "");
459 477
460satisfiable: 478satisfiable:
461 # check for segmented downloads 479 # check for segmented downloads
462 if ($l && $::NO_SEGMENTED) { 480 if ($l && $::NO_SEGMENTED) {
481 my $delay = $::NOW + $::PER_TIMEOUT + 15;
463 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 482 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
464 $self->err(400, "segmented downloads are not allowed"); 483 if ($delay <= $::NOW) {
484 $self->err_segmented_download;
485 } else {
486 $httpevent->broadcast;
487 }
465 } 488 }
466 } 489 }
467 490
468 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 491 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
469 @code = (206, "partial content"); 492 @code = (206, "partial content");
… …
479 $hdr->{"Content-Length"} = $length; 502 $hdr->{"Content-Length"} = $length;
480 503
481 $self->response(@code, $hdr, ""); 504 $self->response(@code, $hdr, "");
482 505
483 if ($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 $self->{fh}->writable or return;
523
484 my ($fh, $buf, $r); 524 my ($fh, $buf, $r);
485 my $current = $Coro::current; 525 my $current = $Coro::current;
486 open $fh, "<", $self->{path} 526 open $fh, "<", $self->{path}
487 or die "$self->{path}: late open failure ($!)"; 527 or die "$self->{path}: late open failure ($!)";
488 528
… …
500 or last; 540 or last;
501 } else { 541 } else {
502 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 542 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
503 $buf, 0, sub { 543 $buf, 0, sub {
504 $r = $_[0]; 544 $r = $_[0];
505 $current->ready; 545 Coro::ready($current);
506 }); 546 });
507 &Coro::schedule; 547 &Coro::schedule;
508 last unless $r; 548 last unless $r;
509 } 549 }
510 my $w = $self->{fh}->syswrite($buf) 550 my $w = syswrite $self->{fh}, $buf
511 or last; 551 or last;
512 $::written += $w; 552 $::written += $w;
513 $self->{written} += $w; 553 $self->{written} += $w;
514 $l += $r; 554 $l += $r;
515 } 555 }
516 }
517 556
518 close $fh; 557 close $fh;
558 }
519} 559}
520 560
5211; 5611;

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