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/cvs/cvsroot/Coro/myhttpd/httpd.pl
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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 1.37 by root, Sun Sep 2 01:03:53 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"
… …
57 Listen => 50, 66 Listen => 50,
58 or die "unable to start server"; 67 or die "unable to start server";
59 68
60push @listen_sockets, $http_port; 69push @listen_sockets, $http_port;
61 70
71our $NOW;
72our $HTTP_NOW;
73
74Event->timer(interval => 1, hard => 1, cb => sub {
75 $NOW = time;
76 $HTTP_NOW = time2str $NOW;
77})->now;
78
62# the "main thread" 79# the "main thread"
63async { 80async {
64 slog 1, "accepting connections"; 81 slog 1, "accepting connections";
65 while () { 82 while () {
66 $connections->down; 83 $connections->down;
67 push @newcons, [$http_port->accept]; 84 push @newcons, [$http_port->accept];
68 #slog 3, "accepted @$connections ".scalar(@pool); 85 #slog 3, "accepted @$connections ".scalar(@pool);
69 $::NOW = time;
70 if (@pool) { 86 if (@pool) {
71 (pop @pool)->ready; 87 (pop @pool)->ready;
72 } else { 88 } else {
73 async \&handler; 89 async \&handler;
74 } 90 }
… …
118 or $self->err(500, "unable to decode peername"); 134 or $self->err(500, "unable to decode peername");
119 135
120 $self->{remote_addr} = inet_ntoa $iaddr; 136 $self->{remote_addr} = inet_ntoa $iaddr;
121 $self->{time} = $::NOW; 137 $self->{time} = $::NOW;
122 138
123 # enter ourselves into various lists
124 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
125
126 $::conns++; 139 $::conns++;
127 140
128 $self; 141 $self;
129} 142}
130 143
… …
132 my $self = shift; 145 my $self = shift;
133 146
134 $::conns--; 147 $::conns--;
135 148
136 $self->eoconn; 149 $self->eoconn;
137 delete $conn{$self->{remote_addr}}{$self*1};
138} 150}
139 151
140# end of connection 152# end of connection
141sub eoconn { 153sub eoconn {
142 my $self = shift; 154 my $self = shift;
155
156 # clean up hints
157 delete $conn{$self->{remote_id}}{$self*1};
143 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 158 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
144} 159}
145 160
146sub slog { 161sub slog {
147 my $self = shift; 162 my $self = shift;
148 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 163 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
149} 164}
150 165
151sub response { 166sub response {
152 my ($self, $code, $msg, $hdr, $content) = @_; 167 my ($self, $code, $msg, $hdr, $content) = @_;
153 my $res = "HTTP/1.1 $code $msg\015\012"; 168 my $res = "HTTP/1.1 $code $msg\015\012";
154 169
155 #$res .= "Connection: close\015\012"; 170 $self->{h}{connection} ||= $hdr->{Connection};
156 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 171
172 $res .= "Date: $HTTP_NOW\015\012";
157 173
158 while (my ($h, $v) = each %$hdr) { 174 while (my ($h, $v) = each %$hdr) {
159 $res .= "$h: $v\015\012" 175 $res .= "$h: $v\015\012"
160 } 176 }
161 $res .= "\015\012"; 177 $res .= "\015\012";
… …
174sub err { 190sub err {
175 my $self = shift; 191 my $self = shift;
176 my ($code, $msg, $hdr, $content) = @_; 192 my ($code, $msg, $hdr, $content) = @_;
177 193
178 unless (defined $content) { 194 unless (defined $content) {
179 $content = "$code $msg"; 195 $content = "$code $msg\n";
180 $hdr->{"Content-Type"} = "text/plain"; 196 $hdr->{"Content-Type"} = "text/plain";
181 $hdr->{"Content-Length"} = length $content; 197 $hdr->{"Content-Length"} = length $content;
182 } 198 }
183 $hdr->{"Connection"} = "close"; 199 $hdr->{"Connection"} = "close";
184 200
185 $self->response($code, $msg, $hdr, $content); 201 $self->response($code, $msg, $hdr, $content);
186 202
187 die bless {}, err::; 203 die bless {}, err::;
188} 204}
189 205
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 { 206sub handle {
224 my $self = shift; 207 my $self = shift;
225 my $fh = $self->{fh}; 208 my $fh = $self->{fh};
209
210 my $host;
226 211
227 $fh->timeout($::REQ_TIMEOUT); 212 $fh->timeout($::REQ_TIMEOUT);
228 while() { 213 while() {
229 $self->{reqs}++; 214 $self->{reqs}++;
230 215
… …
240 } 225 }
241 226
242 $self->{h} = {}; 227 $self->{h} = {};
243 228
244 $fh->timeout($::RES_TIMEOUT); 229 $fh->timeout($::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 }
258 230
259 $req =~ /^(?:\015\012)? 231 $req =~ /^(?:\015\012)?
260 (GET|HEAD) \040+ 232 (GET|HEAD) \040+
261 ([^\040]+) \040+ 233 ([^\040]+) \040+
262 HTTP\/([0-9]+\.[0-9]+) 234 HTTP\/([0-9]+\.[0-9]+)
… …
287 259
288 $self->{h}{$h} = substr $v, 1 260 $self->{h}{$h} = substr $v, 1
289 while ($h, $v) = each %hdr; 261 while ($h, $v) = each %hdr;
290 } 262 }
291 263
264 # remote id should be unique per user
265 my $id = $self->{remote_addr};
266
267 if (exists $self->{h}{"client-ip"}) {
268 $id .= "[".$self->{h}{"client-ip"}."]";
269 } elsif (exists $self->{h}{"x-forwarded-for"}) {
270 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
271 }
272
273 $self->{remote_id} = $id;
274
275 if ($blocked{$id}) {
276 $self->err_blocked($blocked{$id})
277 if $blocked{$id} > $::NOW;
278
279 delete $blocked{$id};
280 }
281
282 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
283 my $delay = $::PER_TIMEOUT + 15;
284 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
285 if ($delay <= 0) {
286 $self->slog(2, "blocked ip $id");
287 $self->err_blocked;
288 } else {
289 Coro::Event::do_timer(after => 4); $delay -= 4;
290 }
291 }
292 }
293
294 # find out server name and port
295 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
296 $host = $1;
297 } else {
298 $host = $self->{h}{host};
299 }
300
301 if (defined $host) {
292 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 302 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
303 } else {
304 ($self->{server_port}, $host)
305 = unpack_sockaddr_in $self->{fh}->getsockname
306 or $self->err(500, "unable to get socket name");
307 $host = inet_ntoa $host;
308 }
293 309
310 $self->{server_name} = $host;
311
312 # enter ourselves into various lists
313 weaken ($conn{$id}{$self*1} = $self);
294 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 314 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
295 315
296 eval { 316 eval {
297 $self->map_uri; 317 $self->map_uri;
298 $self->respond; 318 $self->respond;
299 }; 319 };
300 320
301 $self->eoconn; 321 $self->eoconn;
302 322
303 die if $@ && !ref $@; 323 die if $@ && !ref $@;
304 324
305 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 325 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
306 326
307 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
308 $fh->timeout($::PER_TIMEOUT); 327 $fh->timeout($::PER_TIMEOUT);
309 } 328 }
310} 329}
311 330
312# uri => path mapping 331# uri => path mapping
313sub map_uri { 332sub map_uri {
314 my $self = shift; 333 my $self = shift;
315 my $host = $self->{h}{host} || "default"; 334 my $host = $self->{server_name};
316 my $uri = $self->{uri}; 335 my $uri = $self->{uri};
317 336
318 # some massaging, also makes it more secure 337 # some massaging, also makes it more secure
319 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 338 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
320 $uri =~ s%//+%/%g; 339 $uri =~ s%//+%/%g;
… …
330 $self->{path} = "$::DOCROOT/$host$uri"; 349 $self->{path} = "$::DOCROOT/$host$uri";
331 350
332 $self->access_check; 351 $self->access_check;
333} 352}
334 353
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 { 354sub _cgi {
364 my $self = shift; 355 my $self = shift;
365 my $path = shift; 356 my $path = shift;
366 my $fh; 357 my $fh;
367 358
368 # no two-way xxx supported 359 # no two-way xxx supported
369 if (0 == fork) { 360 if (0 == fork) {
370 open STDOUT, ">&".fileno($self->{fh}); 361 open STDOUT, ">&".fileno($self->{fh});
371 if (chdir $::DOCROOT) { 362 if (chdir $::DOCROOT) {
372 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 363 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
373 $ENV{HTTP_HOST} = $self->server_host; 364 $ENV{HTTP_HOST} = $self->{server_name};
374 $ENV{HTTP_PORT} = $self->{server_host}; 365 $ENV{HTTP_PORT} = $self->{server_port};
375 $ENV{SCRIPT_NAME} = $self->{name}; 366 $ENV{SCRIPT_NAME} = $self->{name};
376 exec $path; 367 exec $path;
377 } 368 }
378 Coro::State::_exit(0); 369 Coro::State::_exit(0);
379 } else { 370 } else {
371 die;
380 } 372 }
373}
374
375sub server_hostport {
376 $_[0]{server_port} == 80
377 ? $_[0]{server_name}
378 : "$_[0]{server_name}:$_[0]{server_port}";
381} 379}
382 380
383sub respond { 381sub respond {
384 my $self = shift; 382 my $self = shift;
385 my $path = $self->{path}; 383 my $path = $self->{path};
… …
395 393
396 if (-d _ && -r _) { 394 if (-d _ && -r _) {
397 # directory 395 # directory
398 if ($path !~ /\/$/) { 396 if ($path !~ /\/$/) {
399 # create a redirect to get the trailing "/" 397 # create a redirect to get the trailing "/"
400 my $host = $self->server_hostport; 398 # we don't try to avoid the :80
401 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 399 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
402 } else { 400 } else {
403 $ims < $self->{stat}[9] 401 $ims < $self->{stat}[9]
404 or $self->err(304, "not modified"); 402 or $self->err(304, "not modified");
405 403
406 if (-r "$path/index.html") { 404 if (-r "$path/index.html") {
… …
430 $idx); 428 $idx);
431} 429}
432 430
433sub handle_file { 431sub handle_file {
434 my $self = shift; 432 my $self = shift;
435 my $length = -s _; 433 my $length = $self->{stat}[7];
434 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
436 my $hdr = { 435 my $hdr = {
437 "Last-Modified" => time2str ((stat _)[9]), 436 "Last-Modified" => time2str ((stat _)[9]),
438 }; 437 };
439 438
440 my @code = (200, "ok"); 439 my @code = (200, "ok");
… …
452 } 451 }
453 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 452 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
454 } 453 }
455 $hdr->{"Content-Range"} = "bytes */$length"; 454 $hdr->{"Content-Range"} = "bytes */$length";
456 $hdr->{"Content-Length"} = $length; 455 $hdr->{"Content-Length"} = $length;
457 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
458 $self->err(416, "not satisfiable", $hdr, ""); 456 $self->err(416, "not satisfiable", $hdr, "");
459 457
460satisfiable: 458satisfiable:
461 # check for segmented downloads 459 # check for segmented downloads
462 if ($l && $::NO_SEGMENTED) { 460 if ($l && $::NO_SEGMENTED) {
461 my $delay = $::PER_TIMEOUT + 15;
463 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 462 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
464 $self->err(400, "segmented downloads are not allowed"); 463 if ($delay <= 0) {
464 $self->err_segmented_download;
465 } else {
466 Coro::Event::do_timer(after => 4); $delay -= 4;
467 }
465 } 468 }
466 } 469 }
467 470
468 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 471 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
469 @code = (206, "partial content"); 472 @code = (206, "partial content");
… …
479 $hdr->{"Content-Length"} = $length; 482 $hdr->{"Content-Length"} = $length;
480 483
481 $self->response(@code, $hdr, ""); 484 $self->response(@code, $hdr, "");
482 485
483 if ($self->{method} eq "GET") { 486 if ($self->{method} eq "GET") {
487 $self->{time} = $::NOW;
488
489 my $fudge = $queue->[0]->waiters;
490 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
491
492 $queue->[1] *= $fudge;
493 my $transfer = $queue->[0]->guard;
494
495 if ($fudge != 1) {
496 $queue->[1] /= $fudge;
497 $queue->[1] = $queue->[1] * $::wait_factor
498 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
499 }
500 $self->{time} = $::NOW;
501
502 $self->{fh}->writable or return;
503
484 my ($fh, $buf, $r); 504 my ($fh, $buf, $r);
485 my $current = $Coro::current; 505 my $current = $Coro::current;
486 open $fh, "<", $self->{path} 506 open $fh, "<", $self->{path}
487 or die "$self->{path}: late open failure ($!)"; 507 or die "$self->{path}: late open failure ($!)";
488 508
… …
500 or last; 520 or last;
501 } else { 521 } else {
502 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 522 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
503 $buf, 0, sub { 523 $buf, 0, sub {
504 $r = $_[0]; 524 $r = $_[0];
505 $current->ready; 525 Coro::ready($current);
506 }); 526 });
507 &Coro::schedule; 527 &Coro::schedule;
508 last unless $r; 528 last unless $r;
509 } 529 }
510 my $w = $self->{fh}->syswrite($buf) 530 my $w = syswrite $self->{fh}, $buf
511 or last; 531 or last;
512 $::written += $w; 532 $::written += $w;
513 $self->{written} += $w; 533 $self->{written} += $w;
514 $l += $r; 534 $l += $r;
515 } 535 }
516 }
517 536
518 close $fh; 537 close $fh;
538 }
519} 539}
520 540
5211; 5411;

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