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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 1.47 by root, Tue Nov 20 01:56:21 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;
8use POSIX ();
5 9
6no utf8; 10no utf8;
7use bytes; 11use bytes;
8 12
9# at least on my machine, this thingy serves files 13# at least on my machine, this thingy serves files
… …
25 my $level = shift; 29 my $level = shift;
26 my $format = shift; 30 my $format = shift;
27 printf "---: $format\n", @_; 31 printf "---: $format\n", @_;
28} 32}
29 33
30my $connections = new Coro::Semaphore $MAX_CONNECTS; 34our $connections = new Coro::Semaphore $MAX_CONNECTS || 250;
35our $httpevent = new Coro::Signal;
36
37our $wait_factor = 0.95;
38
39our @transfers = (
40 [(new Coro::Semaphore $MAX_TRANSFERS_SMALL || 50), 1],
41 [(new Coro::Semaphore $MAX_TRANSFERS_LARGE || 50), 1],
42);
31 43
32my @newcons; 44my @newcons;
33my @pool; 45my @pool;
34 46
35# one "execution thread" 47# one "execution thread"
36sub handler { 48sub handler {
37 while () { 49 while () {
38 my $new = pop @newcons;
39 if ($new) { 50 if (@newcons) {
40 eval { 51 eval {
41 conn->new(@$new)->handle; 52 conn->new(@{pop @newcons})->handle;
42 }; 53 };
43 slog 1, "$@" if $@ && !ref $@; 54 slog 1, "$@" if $@ && !ref $@;
44 $connections->up; 55 $connections->up;
45 } else { 56 } else {
46 last if @pool >= $MAX_POOL; 57 last if @pool >= $MAX_POOL;
… …
48 schedule; 59 schedule;
49 } 60 }
50 } 61 }
51} 62}
52 63
64sub listen_on {
65 my $listen = $_[0];
66
67 push @listen_sockets, $listen;
68
69 # the "main thread"
70 async {
71 slog 1, "accepting connections";
72 while () {
73 $connections->down;
74 push @newcons, [$listen->accept];
75 #slog 3, "accepted @$connections ".scalar(@pool);
76 if (@pool) {
77 (pop @pool)->ready;
78 } else {
79 async \&handler;
80 }
81
82 }
83 };
84}
85
53my $http_port = new Coro::Socket 86my $http_port = new Coro::Socket
54 LocalAddr => $SERVER_HOST, 87 LocalAddr => $SERVER_HOST,
55 LocalPort => $SERVER_PORT, 88 LocalPort => $SERVER_PORT,
56 ReuseAddr => 1, 89 ReuseAddr => 1,
57 Listen => 50, 90 Listen => 50,
58 or die "unable to start server"; 91 or die "unable to start server";
59 92
60push @listen_sockets, $http_port; 93listen_on $http_port;
61 94
62# the "main thread" 95if ($SERVER_PORT2) {
63async { 96 my $http_port = new Coro::Socket
64 slog 1, "accepting connections"; 97 LocalAddr => $SERVER_HOST,
65 while () { 98 LocalPort => $SERVER_PORT2,
66 $connections->down; 99 ReuseAddr => 1,
67 push @newcons, [$http_port->accept]; 100 Listen => 50,
68 #slog 3, "accepted @$connections ".scalar(@pool); 101 or die "unable to start server";
102
103 listen_on $http_port;
104}
105
106our $NOW;
107our $HTTP_NOW;
108
109Event->timer(interval => 1, hard => 1, cb => sub {
69 $::NOW = time; 110 $NOW = time;
70 if (@pool) { 111 $HTTP_NOW = time2str $NOW;
71 (pop @pool)->ready; 112})->now;
72 } else {
73 async \&handler;
74 }
75
76 }
77};
78 113
79package conn; 114package conn;
80 115
81use Socket; 116use Socket;
82use HTTP::Date; 117use HTTP::Date;
… …
109 144
110read_mimetypes; 145read_mimetypes;
111 146
112sub new { 147sub new {
113 my $class = shift; 148 my $class = shift;
149 my $fh = shift;
114 my $peername = shift; 150 my $peername = shift;
115 my $fh = shift;
116 my $self = bless { fh => $fh }, $class; 151 my $self = bless { fh => $fh }, $class;
117 my (undef, $iaddr) = unpack_sockaddr_in $peername 152 my (undef, $iaddr) = unpack_sockaddr_in $peername
118 or $self->err(500, "unable to decode peername"); 153 or $self->err(500, "unable to decode peername");
119 154
120 $self->{remote_addr} = inet_ntoa $iaddr; 155 $self->{remote_addr} = inet_ntoa $iaddr;
121 $self->{time} = $::NOW; 156 $self->{time} = $::NOW;
122 157
123 # enter ourselves into various lists
124 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
125
126 $::conns++; 158 $::conns++;
127 159
128 $self; 160 $self;
129} 161}
130 162
131sub DESTROY { 163sub DESTROY {
132 my $self = shift; 164 my $self = shift;
133
134 $::conns--; 165 $::conns--;
135
136 $self->eoconn; 166 $self->eoconn;
137 delete $conn{$self->{remote_addr}}{$self*1};
138} 167}
139 168
140# end of connection 169# end of connection
141sub eoconn { 170sub eoconn {
142 my $self = shift; 171 my $self = shift;
172
173 # clean up hints
174 delete $conn{$self->{remote_id}}{$self*1};
143 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 175 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
176
177 $httpevent->broadcast;
144} 178}
145 179
146sub slog { 180sub slog {
147 my $self = shift; 181 my $self = shift;
148 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 182 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
149} 183}
150 184
151sub response { 185sub response {
152 my ($self, $code, $msg, $hdr, $content) = @_; 186 my ($self, $code, $msg, $hdr, $content) = @_;
153 my $res = "HTTP/1.1 $code $msg\015\012"; 187 my $res = "HTTP/1.1 $code $msg\015\012";
154 188
155 $self->{h}{connection} ||= $hdr->{Connection}; 189 if (exists $hdr->{Connection}) {
190 if ($hdr->{Connection} =~ /close/) {
191 $self->{h}{connection} = "close"
192 }
193 } else {
194 if ($self->{version} < 1.1) {
195 if ($self->{h}{connection} =~ /keep-alive/i) {
196 $hdr->{Connection} = "Keep-Alive";
197 } else {
198 $self->{h}{connection} = "close"
199 }
200 }
201 }
156 202
157 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 203 $res .= "Date: $HTTP_NOW\015\012";
158 204
159 while (my ($h, $v) = each %$hdr) { 205 while (my ($h, $v) = each %$hdr) {
160 $res .= "$h: $v\015\012" 206 $res .= "$h: $v\015\012"
161 } 207 }
162 $res .= "\015\012"; 208 $res .= "\015\012";
163 209
164 $res .= $content if defined $content and $self->{method} ne "HEAD"; 210 $res .= $content if defined $content and $self->{method} ne "HEAD";
165 211
212 my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $NOW).
166 my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n"; 213 " $self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
167 214
168 print $accesslog $log if $accesslog; 215 print $accesslog $log if $accesslog;
169 print STDERR $log; 216 print STDERR $log;
170 217
171 $self->{written} += 218 $self->{written} +=
… …
175sub err { 222sub err {
176 my $self = shift; 223 my $self = shift;
177 my ($code, $msg, $hdr, $content) = @_; 224 my ($code, $msg, $hdr, $content) = @_;
178 225
179 unless (defined $content) { 226 unless (defined $content) {
180 $content = "$code $msg"; 227 $content = "$code $msg\n";
181 $hdr->{"Content-Type"} = "text/plain"; 228 $hdr->{"Content-Type"} = "text/plain";
182 $hdr->{"Content-Length"} = length $content; 229 $hdr->{"Content-Length"} = length $content;
183 } 230 }
184 $hdr->{"Connection"} = "close"; 231 $hdr->{"Connection"} = "close";
185 232
186 $self->response($code, $msg, $hdr, $content); 233 $self->response($code, $msg, $hdr, $content);
187 234
188 die bless {}, err::; 235 die bless {}, err::;
189} 236}
190 237
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 { 238sub handle {
226 my $self = shift; 239 my $self = shift;
227 my $fh = $self->{fh}; 240 my $fh = $self->{fh};
241
242 my $host;
228 243
229 $fh->timeout($::REQ_TIMEOUT); 244 $fh->timeout($::REQ_TIMEOUT);
230 while() { 245 while() {
231 $self->{reqs}++; 246 $self->{reqs}++;
232 247
… …
242 } 257 }
243 258
244 $self->{h} = {}; 259 $self->{h} = {};
245 260
246 $fh->timeout($::RES_TIMEOUT); 261 $fh->timeout($::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 }
260 262
261 $req =~ /^(?:\015\012)? 263 $req =~ /^(?:\015\012)?
262 (GET|HEAD) \040+ 264 (GET|HEAD) \040+
263 ([^\040]+) \040+ 265 ([^\040]+) \040+
264 HTTP\/([0-9]+\.[0-9]+) 266 HTTP\/([0-9]+\.[0-9]+)
… …
289 291
290 $self->{h}{$h} = substr $v, 1 292 $self->{h}{$h} = substr $v, 1
291 while ($h, $v) = each %hdr; 293 while ($h, $v) = each %hdr;
292 } 294 }
293 295
296 # remote id should be unique per user
297 my $id = $self->{remote_addr};
298
299 if (exists $self->{h}{"client-ip"}) {
300 $id .= "[".$self->{h}{"client-ip"}."]";
301 } elsif (exists $self->{h}{"x-forwarded-for"}) {
302 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
303 }
304
305 $self->{remote_id} = $id;
306
307 if ($blocked{$id}) {
308 $self->err_blocked($blocked{$id})
309 if $blocked{$id} > $::NOW;
310
311 delete $blocked{$id};
312 }
313
314 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
315 my $delay = $::PER_TIMEOUT + $::NOW + 15;
316 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
317 if ($delay < $::NOW) {
318 $self->slog(2, "blocked ip $id");
319 $self->err_blocked;
320 } else {
321 $httpevent->wait;
322 }
323 }
324 }
325
326 # find out server name and port
327 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
328 $host = $1;
329 } else {
330 $host = $self->{h}{host};
331 }
332
333 if (defined $host) {
294 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 334 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
335 } else {
336 ($self->{server_port}, $host)
337 = unpack_sockaddr_in $self->{fh}->sockname
338 or $self->err(500, "unable to get socket name");
339 $host = inet_ntoa $host;
340 }
295 341
342 $self->{server_name} = $host;
343
344 # enter ourselves into various lists
345 weaken ($conn{$id}{$self*1} = $self);
296 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 346 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
297 347
298 eval { 348 eval {
299 $self->map_uri; 349 $self->map_uri;
300 $self->respond; 350 $self->respond;
301 }; 351 };
302 352
303 $self->eoconn; 353 $self->eoconn;
304 354
305 die if $@ && !ref $@; 355 die if $@ && !ref $@;
306 356
307 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 357 last if $self->{h}{connection} =~ /close/;
308 358
309 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]"); 359 $httpevent->broadcast;
360
310 $fh->timeout($::PER_TIMEOUT); 361 $fh->timeout($::PER_TIMEOUT);
311 } 362 }
312} 363}
313 364
314# uri => path mapping 365# uri => path mapping
315sub map_uri { 366sub map_uri {
316 my $self = shift; 367 my $self = shift;
317 my $host = $self->{h}{host} || "default"; 368 my $host = $self->{server_name};
318 my $uri = $self->{uri}; 369 my $uri = $self->{uri};
319 370
320 # some massaging, also makes it more secure 371 # some massaging, also makes it more secure
321 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 372 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
322 $uri =~ s%//+%/%g; 373 $uri =~ s%//+%/%g;
… …
332 $self->{path} = "$::DOCROOT/$host$uri"; 383 $self->{path} = "$::DOCROOT/$host$uri";
333 384
334 $self->access_check; 385 $self->access_check;
335} 386}
336 387
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 { 388sub _cgi {
366 my $self = shift; 389 my $self = shift;
367 my $path = shift; 390 my $path = shift;
368 my $fh; 391 my $fh;
369 392
370 # no two-way xxx supported 393 # no two-way xxx supported
371 if (0 == fork) { 394 if (0 == fork) {
372 open STDOUT, ">&".fileno($self->{fh}); 395 open STDOUT, ">&".fileno($self->{fh});
373 if (chdir $::DOCROOT) { 396 if (chdir $::DOCROOT) {
374 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 397 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
375 $ENV{HTTP_HOST} = $self->server_host; 398 $ENV{HTTP_HOST} = $self->{server_name};
376 $ENV{HTTP_PORT} = $self->{server_host}; 399 $ENV{HTTP_PORT} = $self->{server_port};
377 $ENV{SCRIPT_NAME} = $self->{name}; 400 $ENV{SCRIPT_NAME} = $self->{name};
378 exec $path; 401 exec $path;
379 } 402 }
380 Coro::State::_exit(0); 403 Coro::State::_exit(0);
381 } else { 404 } else {
405 die;
382 } 406 }
407}
408
409sub server_hostport {
410 $_[0]{server_port} == 80
411 ? $_[0]{server_name}
412 : "$_[0]{server_name}:$_[0]{server_port}";
383} 413}
384 414
385sub respond { 415sub respond {
386 my $self = shift; 416 my $self = shift;
387 my $path = $self->{path}; 417 my $path = $self->{path};
… …
397 427
398 if (-d _ && -r _) { 428 if (-d _ && -r _) {
399 # directory 429 # directory
400 if ($path !~ /\/$/) { 430 if ($path !~ /\/$/) {
401 # create a redirect to get the trailing "/" 431 # create a redirect to get the trailing "/"
402 my $host = $self->server_hostport; 432 # we don't try to avoid the :80
403 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 433 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
404 } else { 434 } else {
405 $ims < $self->{stat}[9] 435 $ims < $self->{stat}[9]
406 or $self->err(304, "not modified"); 436 or $self->err(304, "not modified");
407 437
408 if (-r "$path/index.html") { 438 if (-r "$path/index.html") {
409 $self->{path} .= "/index.html"; 439 # replace directory "size" by index.html filesize
440 $self->{stat}[7] = (stat ($self->{path} .= "/index.html"))[7];
410 $self->handle_file; 441 $self->handle_file;
411 } else { 442 } else {
412 $self->handle_dir; 443 $self->handle_dir;
413 } 444 }
414 } 445 }
… …
426 457
427 $self->response(200, "ok", 458 $self->response(200, "ok",
428 { 459 {
429 "Content-Type" => "text/html", 460 "Content-Type" => "text/html",
430 "Content-Length" => length $idx, 461 "Content-Length" => length $idx,
462 "Last-Modified" => time2str ((stat _)[9]),
431 }, 463 },
432 $idx); 464 $idx);
433} 465}
434 466
435sub handle_file { 467sub handle_file {
436 my $self = shift; 468 my $self = shift;
437 my $length = -s _; 469 my $length = $self->{stat}[7];
470 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
438 my $hdr = { 471 my $hdr = {
439 "Last-Modified" => time2str ((stat _)[9]), 472 "Last-Modified" => time2str ((stat _)[9]),
440 }; 473 };
441 474
442 my @code = (200, "ok"); 475 my @code = (200, "ok");
… …
454 } 487 }
455 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 488 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
456 } 489 }
457 $hdr->{"Content-Range"} = "bytes */$length"; 490 $hdr->{"Content-Range"} = "bytes */$length";
458 $hdr->{"Content-Length"} = $length; 491 $hdr->{"Content-Length"} = $length;
459 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
460 $self->err(416, "not satisfiable", $hdr, ""); 492 $self->err(416, "not satisfiable", $hdr, "");
461 493
462satisfiable: 494satisfiable:
463 # check for segmented downloads 495 # check for segmented downloads
464 if ($l && $::NO_SEGMENTED) { 496 if ($l && $::NO_SEGMENTED) {
497 my $delay = $::NOW + $::PER_TIMEOUT + 15;
465 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 498 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
466 $self->err(400, "segmented downloads are not allowed", 499 if ($delay <= $::NOW) {
467 { "Content-Type" => "text/html", Connection => "close" }, <<EOF); 500 $self->err_segmented_download;
468<html> 501 } else {
469<head> 502 $httpevent->wait;
470<title>Segmented downloads are not allowed</title> 503 }
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 } 504 }
481 } 505 }
482 506
483 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 507 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
484 @code = (206, "partial content"); 508 @code = (206, "partial content");
… …
494 $hdr->{"Content-Length"} = $length; 518 $hdr->{"Content-Length"} = $length;
495 519
496 $self->response(@code, $hdr, ""); 520 $self->response(@code, $hdr, "");
497 521
498 if ($self->{method} eq "GET") { 522 if ($self->{method} eq "GET") {
523 $self->{time} = $::NOW;
524
525 my $fudge = $queue->[0]->waiters;
526 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
527
528 $queue->[1] *= $fudge;
529 my $transfer = $queue->[0]->guard;
530
531 if ($fudge != 1) {
532 $queue->[1] /= $fudge;
533 $queue->[1] = $queue->[1] * $::wait_factor
534 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
535 }
536 $self->{time} = $::NOW;
537
538 $self->{fh}->writable or return;
539
499 my ($fh, $buf, $r); 540 my ($fh, $buf, $r);
500 my $current = $Coro::current; 541 my $current = $Coro::current;
501 open $fh, "<", $self->{path} 542 open $fh, "<", $self->{path}
502 or die "$self->{path}: late open failure ($!)"; 543 or die "$self->{path}: late open failure ($!)";
503 544
… …
515 or last; 556 or last;
516 } else { 557 } else {
517 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 558 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
518 $buf, 0, sub { 559 $buf, 0, sub {
519 $r = $_[0]; 560 $r = $_[0];
520 $current->ready; 561 Coro::ready($current);
521 }); 562 });
522 &Coro::schedule; 563 &Coro::schedule;
523 last unless $r; 564 last unless $r;
524 } 565 }
525 my $w = $self->{fh}->syswrite($buf) 566 my $w = syswrite $self->{fh}, $buf
526 or last; 567 or last;
527 $::written += $w; 568 $::written += $w;
528 $self->{written} += $w; 569 $self->{written} += $w;
529 $l += $r; 570 $l += $r;
530 } 571 }
531 }
532 572
533 close $fh; 573 close $fh;
574 }
534} 575}
535 576
5361; 5771;

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