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Comparing Coro/myhttpd/httpd.pl (file contents):
Revision 1.26 by root, Sun Aug 19 22:59:35 2001 UTC vs.
Revision 1.39 by root, Sun Sep 2 12:23:04 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 5
6use HTTP::Date;
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
10# quite a bit faster than apache, ;) 12# quite a bit faster than apache, ;)
11# and quite a bit slower than thttpd :( 13# and quite a bit slower than thttpd :(
12 14
13$SIG{PIPE} = 'IGNORE'; 15$SIG{PIPE} = 'IGNORE';
14 16
17our $accesslog;
18
19if ($ACCESS_LOG) {
20 use IO::Handle;
21 open $accesslog, ">>$ACCESS_LOG"
22 or die "$ACCESS_LOG: $!";
23 $accesslog->autoflush(1);
24}
25
15sub slog { 26sub slog {
16 my $level = shift; 27 my $level = shift;
17 my $format = shift; 28 my $format = shift;
18 printf "---: $format\n", @_; 29 printf "---: $format\n", @_;
19} 30}
20 31
21my $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);
22 40
23my @newcons; 41my @newcons;
24my @pool; 42my @pool;
25 43
26# one "execution thread" 44# one "execution thread"
27sub handler { 45sub handler {
28 while () { 46 while () {
29 my $new = pop @newcons;
30 if ($new) { 47 if (@newcons) {
31 eval { 48 eval {
32 conn->new(@$new)->handle; 49 conn->new(@{pop @newcons})->handle;
33 }; 50 };
34 slog 1, "$@" if $@ && !ref $@; 51 slog 1, "$@" if $@ && !ref $@;
35 $connections->up; 52 $connections->up;
36 } else { 53 } else {
37 last if @pool >= $MAX_POOL; 54 last if @pool >= $MAX_POOL;
… …
48 Listen => 50, 65 Listen => 50,
49 or die "unable to start server"; 66 or die "unable to start server";
50 67
51push @listen_sockets, $http_port; 68push @listen_sockets, $http_port;
52 69
70our $NOW;
71our $HTTP_NOW;
72
73Event->timer(interval => 1, hard => 1, cb => sub {
74 $NOW = time;
75 $HTTP_NOW = time2str $NOW;
76})->now;
77
53# the "main thread" 78# the "main thread"
54async { 79async {
55 slog 1, "accepting connections"; 80 slog 1, "accepting connections";
56 while () { 81 while () {
57 $connections->down; 82 $connections->down;
58 push @newcons, [$http_port->accept]; 83 push @newcons, [$http_port->accept];
59 #slog 3, "accepted @$connections ".scalar(@pool); 84 #slog 3, "accepted @$connections ".scalar(@pool);
60 $::NOW = time;
61 if (@pool) { 85 if (@pool) {
62 (pop @pool)->ready; 86 (pop @pool)->ready;
63 } else { 87 } else {
64 async \&handler; 88 async \&handler;
65 } 89 }
… …
109 or $self->err(500, "unable to decode peername"); 133 or $self->err(500, "unable to decode peername");
110 134
111 $self->{remote_addr} = inet_ntoa $iaddr; 135 $self->{remote_addr} = inet_ntoa $iaddr;
112 $self->{time} = $::NOW; 136 $self->{time} = $::NOW;
113 137
114 # enter ourselves into various lists
115 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
116
117 $::conns++; 138 $::conns++;
118 139
119 $self; 140 $self;
120} 141}
121 142
122sub DESTROY { 143sub DESTROY {
123 my $self = shift; 144 my $self = shift;
124
125 $::conns--; 145 $::conns--;
126
127 $self->eoconn; 146 $self->eoconn;
128 delete $conn{$self->{remote_addr}}{$self*1};
129} 147}
130 148
131# end of connection 149# end of connection
132sub eoconn { 150sub eoconn {
133 my $self = shift; 151 my $self = shift;
152
153 # clean up hints
154 delete $conn{$self->{remote_id}}{$self*1};
134 delete $uri{$self->{remote_addr}}{$self->{uri}}{$self*1}; 155 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
135} 156}
136 157
137sub slog { 158sub slog {
138 my $self = shift; 159 my $self = shift;
139 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 160 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
140} 161}
141 162
142sub response { 163sub response {
143 my ($self, $code, $msg, $hdr, $content) = @_; 164 my ($self, $code, $msg, $hdr, $content) = @_;
144 my $res = "HTTP/1.1 $code $msg\015\012"; 165 my $res = "HTTP/1.1 $code $msg\015\012";
145 166
146 #$res .= "Connection: close\015\012"; 167 $self->{h}{connection} ||= $hdr->{Connection};
147 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 168
169 $res .= "Date: $HTTP_NOW\015\012";
148 170
149 while (my ($h, $v) = each %$hdr) { 171 while (my ($h, $v) = each %$hdr) {
150 $res .= "$h: $v\015\012" 172 $res .= "$h: $v\015\012"
151 } 173 }
152 $res .= "\015\012"; 174 $res .= "\015\012";
153 175
154 $res .= $content if defined $content and $self->{method} ne "HEAD"; 176 $res .= $content if defined $content and $self->{method} ne "HEAD";
155 177
156 print STDERR "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n"; 178 my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
179
180 print $accesslog $log if $accesslog;
181 print STDERR $log;
157 182
158 $self->{written} += 183 $self->{written} +=
159 print {$self->{fh}} $res; 184 print {$self->{fh}} $res;
160} 185}
161 186
162sub err { 187sub err {
163 my $self = shift; 188 my $self = shift;
164 my ($code, $msg, $hdr, $content) = @_; 189 my ($code, $msg, $hdr, $content) = @_;
165 190
166 unless (defined $content) { 191 unless (defined $content) {
167 $content = "$code $msg"; 192 $content = "$code $msg\n";
168 $hdr->{"Content-Type"} = "text/plain"; 193 $hdr->{"Content-Type"} = "text/plain";
169 $hdr->{"Content-Length"} = length $content; 194 $hdr->{"Content-Length"} = length $content;
170 } 195 }
171 $hdr->{"Connection"} = "close"; 196 $hdr->{"Connection"} = "close";
172 197
173 $self->response($code, $msg, $hdr, $content); 198 $self->response($code, $msg, $hdr, $content);
174 199
175 die bless {}, err::; 200 die bless {}, err::;
176} 201}
177 202
178sub err_blocked {
179 my $self = shift;
180 my $ip = $self->{remote_addr};
181 my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
182
183 Coro::Event::do_timer(after => 20*rand);
184
185 $self->err(401, "too many connections",
186 {
187 "Content-Type" => "text/html",
188 "Retry-After" => $::BLOCKTIME,
189 "Warning" => "Please do NOT retry, you have been blocked",
190 "WWW-Authenticate" => "Basic realm=\"Please do NOT retry, you have been blocked\"",
191 },
192 <<EOF);
193<html><p>
194You have been blocked because you opened too many connections. You
195may retry at</p>
196
197 <p><blockquote>$time.</blockquote></p>
198
199<p>Until then, each new access will renew the block. You might want to have a
200look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>
201</html>
202EOF
203}
204
205sub handle { 203sub handle {
206 my $self = shift; 204 my $self = shift;
207 my $fh = $self->{fh}; 205 my $fh = $self->{fh};
206
207 my $host;
208 208
209 $fh->timeout($::REQ_TIMEOUT); 209 $fh->timeout($::REQ_TIMEOUT);
210 while() { 210 while() {
211 $self->{reqs}++; 211 $self->{reqs}++;
212 212
… …
222 } 222 }
223 223
224 $self->{h} = {}; 224 $self->{h} = {};
225 225
226 $fh->timeout($::RES_TIMEOUT); 226 $fh->timeout($::RES_TIMEOUT);
227 my $ip = $self->{remote_addr};
228
229 if ($blocked{$ip}) {
230 $self->err_blocked($blocked{$ip})
231 if $blocked{$ip} > $::NOW;
232
233 delete $blocked{$ip};
234 }
235
236 if (%{$conn{$ip}} > $::MAX_CONN_IP) {
237 $self->slog(2, "blocked ip $ip");
238 $self->err_blocked;
239 }
240 227
241 $req =~ /^(?:\015\012)? 228 $req =~ /^(?:\015\012)?
242 (GET|HEAD) \040+ 229 (GET|HEAD) \040+
243 ([^\040]+) \040+ 230 ([^\040]+) \040+
244 HTTP\/([0-9]+\.[0-9]+) 231 HTTP\/([0-9]+\.[0-9]+)
… …
269 256
270 $self->{h}{$h} = substr $v, 1 257 $self->{h}{$h} = substr $v, 1
271 while ($h, $v) = each %hdr; 258 while ($h, $v) = each %hdr;
272 } 259 }
273 260
261 # remote id should be unique per user
262 my $id = $self->{remote_addr};
263
264 if (exists $self->{h}{"client-ip"}) {
265 $id .= "[".$self->{h}{"client-ip"}."]";
266 } elsif (exists $self->{h}{"x-forwarded-for"}) {
267 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
268 }
269
270 $self->{remote_id} = $id;
271
272 if ($blocked{$id}) {
273 $self->err_blocked($blocked{$id})
274 if $blocked{$id} > $::NOW;
275
276 delete $blocked{$id};
277 }
278
279 if (%{$conn{$id}} >= $::MAX_CONN_IP) {
280 my $delay = $::PER_TIMEOUT + 15;
281 while (%{$conn{$id}} >= $::MAX_CONN_IP) {
282 if ($delay <= 0) {
283 $self->slog(2, "blocked ip $id");
284 $self->err_blocked;
285 } else {
286 Coro::Event::do_timer(after => 4); $delay -= 4;
287 }
288 }
289 }
290
291 # find out server name and port
292 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
293 $host = $1;
294 } else {
295 $host = $self->{h}{host};
296 }
297
298 if (defined $host) {
274 $self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; 299 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
300 } else {
301 ($self->{server_port}, $host)
302 = unpack_sockaddr_in $self->{fh}->getsockname
303 or $self->err(500, "unable to get socket name");
304 $host = inet_ntoa $host;
305 }
275 306
307 $self->{server_name} = $host;
308
309 # enter ourselves into various lists
310 weaken ($conn{$id}{$self*1} = $self);
276 weaken ($uri{$self->{remote_addr}}{$self->{uri}}{$self*1} = $self); 311 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
277 312
278 eval { 313 eval {
279 $self->map_uri; 314 $self->map_uri;
280 $self->respond; 315 $self->respond;
281 }; 316 };
282 317
283 $self->eoconn; 318 $self->eoconn;
284 319
285 die if $@ && !ref $@; 320 die if $@ && !ref $@;
286 321
287 last if $self->{h}{connection} =~ /close/ || $self->{version} lt "1.1"; 322 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
288 323
289 $self->slog(9, "persistent connection [".$self->{h}{"user-agent"}."][$self->{reqs}]");
290 $fh->timeout($::PER_TIMEOUT); 324 $fh->timeout($::PER_TIMEOUT);
291 } 325 }
292} 326}
293 327
294# uri => path mapping 328# uri => path mapping
295sub map_uri { 329sub map_uri {
296 my $self = shift; 330 my $self = shift;
297 my $host = $self->{h}{host} || "default"; 331 my $host = $self->{server_name};
298 my $uri = $self->{uri}; 332 my $uri = $self->{uri};
299 333
300 # some massaging, also makes it more secure 334 # some massaging, also makes it more secure
301 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; 335 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
302 $uri =~ s%//+%/%g; 336 $uri =~ s%//+%/%g;
… …
312 $self->{path} = "$::DOCROOT/$host$uri"; 346 $self->{path} = "$::DOCROOT/$host$uri";
313 347
314 $self->access_check; 348 $self->access_check;
315} 349}
316 350
317sub server_address {
318 my $self = shift;
319 my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname
320 or $self->err(500, "unable to get socket name");
321 ((inet_ntoa $iaddr), $port);
322}
323
324sub server_host {
325 my $self = shift;
326 if (exists $self->{h}{host}) {
327 return $self->{h}{host};
328 } else {
329 return (($self->server_address)[0]);
330 }
331}
332
333sub server_hostport {
334 my $self = shift;
335 my ($host, $port);
336 if (exists $self->{h}{host}) {
337 ($host, $port) = ($self->{h}{host}, $self->{server_port});
338 } else {
339 ($host, $port) = $self->server_address;
340 }
341 $port = $port == 80 ? "" : ":$port";
342 $host.$port;
343}
344
345sub _cgi { 351sub _cgi {
346 my $self = shift; 352 my $self = shift;
347 my $path = shift; 353 my $path = shift;
348 my $fh; 354 my $fh;
349 355
350 # no two-way xxx supported 356 # no two-way xxx supported
351 if (0 == fork) { 357 if (0 == fork) {
352 open STDOUT, ">&".fileno($self->{fh}); 358 open STDOUT, ">&".fileno($self->{fh});
353 if (chdir $::DOCROOT) { 359 if (chdir $::DOCROOT) {
354 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 360 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
355 $ENV{HTTP_HOST} = $self->server_host; 361 $ENV{HTTP_HOST} = $self->{server_name};
356 $ENV{HTTP_PORT} = $self->{server_host}; 362 $ENV{HTTP_PORT} = $self->{server_port};
357 $ENV{SCRIPT_NAME} = $self->{name}; 363 $ENV{SCRIPT_NAME} = $self->{name};
358 exec $path; 364 exec $path;
359 } 365 }
360 Coro::State::_exit(0); 366 Coro::State::_exit(0);
361 } else { 367 } else {
368 die;
362 } 369 }
370}
371
372sub server_hostport {
373 $_[0]{server_port} == 80
374 ? $_[0]{server_name}
375 : "$_[0]{server_name}:$_[0]{server_port}";
363} 376}
364 377
365sub respond { 378sub respond {
366 my $self = shift; 379 my $self = shift;
367 my $path = $self->{path}; 380 my $path = $self->{path};
… …
377 390
378 if (-d _ && -r _) { 391 if (-d _ && -r _) {
379 # directory 392 # directory
380 if ($path !~ /\/$/) { 393 if ($path !~ /\/$/) {
381 # create a redirect to get the trailing "/" 394 # create a redirect to get the trailing "/"
382 my $host = $self->server_hostport; 395 # we don't try to avoid the :80
383 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 396 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
384 } else { 397 } else {
385 $ims < $self->{stat}[9] 398 $ims < $self->{stat}[9]
386 or $self->err(304, "not modified"); 399 or $self->err(304, "not modified");
387 400
388 if (-r "$path/index.html") { 401 if (-r "$path/index.html") {
… …
412 $idx); 425 $idx);
413} 426}
414 427
415sub handle_file { 428sub handle_file {
416 my $self = shift; 429 my $self = shift;
417 my $length = -s _; 430 my $length = $self->{stat}[7];
431 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
418 my $hdr = { 432 my $hdr = {
419 "Last-Modified" => time2str ((stat _)[9]), 433 "Last-Modified" => time2str ((stat _)[9]),
420 }; 434 };
421 435
422 my @code = (200, "ok"); 436 my @code = (200, "ok");
… …
434 } 448 }
435 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l; 449 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
436 } 450 }
437 $hdr->{"Content-Range"} = "bytes */$length"; 451 $hdr->{"Content-Range"} = "bytes */$length";
438 $hdr->{"Content-Length"} = $length; 452 $hdr->{"Content-Length"} = $length;
439 $self->slog(9, "not satisfiable($self->{h}{range}|".$self->{h}{"user-agent"}.")");
440 $self->err(416, "not satisfiable", $hdr, ""); 453 $self->err(416, "not satisfiable", $hdr, "");
441 454
442satisfiable: 455satisfiable:
443 # check for segmented downloads 456 # check for segmented downloads
444 if ($l && $::NO_SEGMENTED) { 457 if ($l && $::NO_SEGMENTED) {
458 my $delay = $::PER_TIMEOUT + 15;
445 if (%{$uri{$self->{remote_addr}}{$self->{uri}}} > 1) { 459 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
446 $self->err(400, "segmented downloads are not allowed"); 460 if ($delay <= 0) {
461 $self->err_segmented_download;
462 } else {
463 Coro::Event::do_timer(after => 4); $delay -= 4;
464 }
447 } 465 }
448 } 466 }
449 467
450 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 468 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
451 @code = (206, "partial content"); 469 @code = (206, "partial content");
… …
461 $hdr->{"Content-Length"} = $length; 479 $hdr->{"Content-Length"} = $length;
462 480
463 $self->response(@code, $hdr, ""); 481 $self->response(@code, $hdr, "");
464 482
465 if ($self->{method} eq "GET") { 483 if ($self->{method} eq "GET") {
484 $self->{time} = $::NOW;
485
486 my $fudge = $queue->[0]->waiters;
487 $fudge = $fudge ? ($fudge+1)/$fudge : 1;
488
489 $queue->[1] *= $fudge;
490 my $transfer = $queue->[0]->guard;
491
492 if ($fudge != 1) {
493 $queue->[1] /= $fudge;
494 $queue->[1] = $queue->[1] * $::wait_factor
495 + ($::NOW - $self->{time}) * (1 - $::wait_factor);
496 }
497 $self->{time} = $::NOW;
498
499 $self->{fh}->writable or return;
500
466 my ($fh, $buf, $r); 501 my ($fh, $buf, $r);
467 my $current = $Coro::current; 502 my $current = $Coro::current;
468 open $fh, "<", $self->{path} 503 open $fh, "<", $self->{path}
469 or die "$self->{path}: late open failure ($!)"; 504 or die "$self->{path}: late open failure ($!)";
470 505
… …
482 or last; 517 or last;
483 } else { 518 } else {
484 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h), 519 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
485 $buf, 0, sub { 520 $buf, 0, sub {
486 $r = $_[0]; 521 $r = $_[0];
487 $current->ready; 522 Coro::ready($current);
488 }); 523 });
489 &Coro::schedule; 524 &Coro::schedule;
490 last unless $r; 525 last unless $r;
491 } 526 }
492 my $w = $self->{fh}->syswrite($buf) 527 my $w = syswrite $self->{fh}, $buf
493 or last; 528 or last;
494 $::written += $w; 529 $::written += $w;
495 $self->{written} += $w; 530 $self->{written} += $w;
496 $l += $r; 531 $l += $r;
497 } 532 }
498 }
499 533
500 close $fh; 534 close $fh;
535 }
501} 536}
502 537
5031; 5381;

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