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/cvs/Coro/myhttpd/httpd.pl
Revision: 1.62
Committed: Sun Jan 6 05:29:39 2002 UTC (22 years, 6 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.61: +5 -1 lines
Log Message:
*** empty log message ***

File Contents

# Content
1 use Coro;
2 use Coro::Semaphore;
3 use Coro::Event;
4 use Coro::Socket;
5 use Coro::Signal;
6
7 use HTTP::Date;
8 use POSIX ();
9
10 no utf8;
11 use bytes;
12
13 # at least on my machine, this thingy serves files
14 # quite a bit faster than apache, ;)
15 # and quite a bit slower than thttpd :(
16
17 $SIG{PIPE} = 'IGNORE';
18
19 our $accesslog;
20 our $errorlog;
21
22 our $NOW;
23 our $HTTP_NOW;
24
25 Event->timer(interval => 1, hard => 1, cb => sub {
26 $NOW = time;
27 $HTTP_NOW = time2str $NOW;
28 })->now;
29
30 if ($ERROR_LOG) {
31 use IO::Handle;
32 open $errorlog, ">>$ERROR_LOG"
33 or die "$ERROR_LOG: $!";
34 $errorlog->autoflush(1);
35 }
36
37 if ($ACCESS_LOG) {
38 use IO::Handle;
39 open $accesslog, ">>$ACCESS_LOG"
40 or die "$ACCESS_LOG: $!";
41 $accesslog->autoflush(1);
42 }
43
44 sub slog {
45 my $level = shift;
46 my $format = shift;
47 my $NOW = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $::NOW);
48 printf "$NOW: $format\n", @_;
49 printf $errorlog "$NOW: $format\n", @_ if $errorlog;
50 }
51
52 our $connections = new Coro::Semaphore $MAX_CONNECTS || 250;
53 our $httpevent = new Coro::Signal;
54
55 our $queue_file = new transferqueue slots => $MAX_TRANSFERS, maxsize => 250_000_000;
56 our $queue_index = new transferqueue slots => 10;
57
58 our $requests;
59
60 my @newcons;
61 my @pool;
62
63 # one "execution thread"
64 sub handler {
65 while () {
66 if (@newcons) {
67 eval {
68 conn->new(@{pop @newcons})->handle;
69 };
70 slog 1, "$@" if $@ && !ref $@;
71
72 $httpevent->broadcast; # only for testing, but doesn't matter much
73
74 $connections->up;
75 } else {
76 last if @pool >= $MAX_POOL;
77 push @pool, $Coro::current;
78 schedule;
79 }
80 }
81 }
82
83 sub listen_on {
84 my $listen = $_[0];
85
86 push @listen_sockets, $listen;
87
88 # the "main thread"
89 async {
90 slog 1, "accepting connections";
91 while () {
92 $connections->down;
93 push @newcons, [$listen->accept];
94 #slog 3, "accepted @$connections ".scalar(@pool);
95 if (@pool) {
96 (pop @pool)->ready;
97 } else {
98 async \&handler;
99 }
100
101 }
102 };
103 }
104
105 my $http_port = new Coro::Socket
106 LocalAddr => $SERVER_HOST,
107 LocalPort => $SERVER_PORT,
108 ReuseAddr => 1,
109 Listen => 50,
110 or die "unable to start server";
111
112 listen_on $http_port;
113
114 if ($SERVER_PORT2) {
115 my $http_port = new Coro::Socket
116 LocalAddr => $SERVER_HOST,
117 LocalPort => $SERVER_PORT2,
118 ReuseAddr => 1,
119 Listen => 50,
120 or die "unable to start server";
121
122 listen_on $http_port;
123 }
124
125 package conn;
126
127 use Socket;
128 use HTTP::Date;
129 use Convert::Scalar 'weaken';
130 use Linux::AIO;
131
132 Linux::AIO::min_parallel $::AIO_PARALLEL;
133
134 Event->io(fd => Linux::AIO::poll_fileno,
135 poll => 'r', async => 1,
136 cb => \&Linux::AIO::poll_cb);
137
138 our %conn; # $conn{ip}{self} => connobj
139 our %uri; # $uri{ip}{uri}{self}
140 our %blocked;
141 our %mimetype;
142
143 sub read_mimetypes {
144 local *M;
145 if (open M, "<mime_types") {
146 while (<M>) {
147 if (/^([^#]\S+)\t+(\S+)$/) {
148 $mimetype{lc $1} = $2;
149 }
150 }
151 } else {
152 print "cannot open mime_types\n";
153 }
154 }
155
156 read_mimetypes;
157
158 sub new {
159 my $class = shift;
160 my $fh = shift;
161 my $peername = shift;
162 my $self = bless { fh => $fh }, $class;
163 my (undef, $iaddr) = unpack_sockaddr_in $peername
164 or $self->err(500, "unable to decode peername");
165
166 $self->{remote_addr} =
167 $self->{remote_id} = inet_ntoa $iaddr;
168
169 $self->{time} = $::NOW;
170
171 weaken ($Coro::current->{conn} = $self);
172
173 $::conns++;
174 $::maxconns = $::conns if $::conns > $::maxconns;
175
176 $self;
177 }
178
179 sub DESTROY {
180 #my $self = shift;
181 $::conns--;
182 }
183
184 sub slog {
185 my $self = shift;
186 main::slog($_[0], "$self->{remote_id}> $_[1]");
187 }
188
189 sub response {
190 my ($self, $code, $msg, $hdr, $content) = @_;
191 my $res = "HTTP/1.1 $code $msg\015\012";
192
193 if (exists $hdr->{Connection}) {
194 if ($hdr->{Connection} =~ /close/) {
195 $self->{h}{connection} = "close"
196 }
197 } else {
198 if ($self->{version} < 1.1) {
199 if ($self->{h}{connection} =~ /keep-alive/i) {
200 $hdr->{Connection} = "Keep-Alive";
201 } else {
202 $self->{h}{connection} = "close"
203 }
204 }
205 }
206
207 $res .= "Date: $HTTP_NOW\015\012";
208
209 while (my ($h, $v) = each %$hdr) {
210 $res .= "$h: $v\015\012"
211 }
212 $res .= "\015\012";
213
214 $res .= $content if defined $content and $self->{method} ne "HEAD";
215
216 my $log = (POSIX::strftime "%Y-%m-%d %H:%M:%S", gmtime $NOW).
217 " $self->{remote_id} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}.
218 " \"$self->{h}{referer}\"\n";
219
220 print $accesslog $log if $accesslog;
221 print STDERR $log;
222
223 $self->{written} +=
224 print {$self->{fh}} $res;
225 }
226
227 sub err {
228 my $self = shift;
229 my ($code, $msg, $hdr, $content) = @_;
230
231 unless (defined $content) {
232 $content = "$code $msg\n";
233 $hdr->{"Content-Type"} = "text/plain";
234 $hdr->{"Content-Length"} = length $content;
235 }
236 $hdr->{"Connection"} = "close";
237
238 $self->response($code, $msg, $hdr, $content);
239
240 die bless {}, err::;
241 }
242
243 sub handle {
244 my $self = shift;
245 my $fh = $self->{fh};
246
247 my $host;
248
249 $fh->timeout($::REQ_TIMEOUT);
250 while() {
251 $self->{reqs}++;
252
253 # read request and parse first line
254 my $req = $fh->readline("\015\012\015\012");
255
256 unless (defined $req) {
257 if (exists $self->{version}) {
258 last;
259 } else {
260 $self->err(408, "request timeout");
261 }
262 }
263
264 $self->{h} = {};
265
266 $fh->timeout($::RES_TIMEOUT);
267
268 $req =~ /^(?:\015\012)?
269 (GET|HEAD) \040+
270 ([^\040]+) \040+
271 HTTP\/([0-9]+\.[0-9]+)
272 \015\012/gx
273 or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
274
275 $self->{method} = $1;
276 $self->{uri} = $2;
277 $self->{version} = $3;
278
279 $3 =~ /^1\./
280 or $self->err(506, "http protocol version $3 not supported");
281
282 # parse headers
283 {
284 my (%hdr, $h, $v);
285
286 $hdr{lc $1} .= ",$2"
287 while $req =~ /\G
288 ([^:\000-\040]+):
289 [\008\040]*
290 ((?: [^\015\012]+ | \015\012[\008\040] )*)
291 \015\012
292 /gxc;
293
294 $req =~ /\G\015\012$/
295 or $self->err(400, "bad request");
296
297 $self->{h}{$h} = substr $v, 1
298 while ($h, $v) = each %hdr;
299 }
300
301 $requests++;
302
303 # remote id should be unique per user
304 my $id = $self->{remote_addr};
305
306 if (exists $self->{h}{"client-ip"}) {
307 $id .= "[".$self->{h}{"client-ip"}."]";
308 } elsif (exists $self->{h}{"x-forwarded-for"}) {
309 $id .= "[".$self->{h}{"x-forwarded-for"}."]";
310 }
311
312 $self->{remote_id} = $id;
313
314 weaken (local $conn{$id}{$self*1} = $self);
315
316 if ($blocked{$id}) {
317 $self->err_blocked
318 if $blocked{$id}[0] > $::NOW;
319
320 delete $blocked{$id};
321 }
322
323 # find out server name and port
324 if ($self->{uri} =~ s/^http:\/\/([^\/?#]*)//i) {
325 $host = $1;
326 } else {
327 $host = $self->{h}{host};
328 }
329
330 if (defined $host) {
331 $self->{server_port} = $host =~ s/:([0-9]+)$// ? $1 : 80;
332 } else {
333 ($self->{server_port}, $host)
334 = unpack_sockaddr_in $self->{fh}->sockname
335 or $self->err(500, "unable to get socket name");
336 $host = inet_ntoa $host;
337 }
338
339 $self->{server_name} = $host;
340
341 weaken (local $uri{$id}{$self->{uri}}{$self*1} = $self);
342
343 eval {
344 $self->map_uri;
345 $self->respond;
346 };
347
348 die if $@ && !ref $@;
349
350 last if $self->{h}{connection} =~ /close/i;
351
352 $httpevent->broadcast;
353
354 $fh->timeout($::PER_TIMEOUT);
355 }
356 }
357
358 sub block {
359 my $self = shift;
360
361 $blocked{$self->{remote_id}} = [$::NOW + $_[0], $_[1]];
362 $self->slog(2, "blocked ip $self->{remote_id}");
363 $self->err_blocked;
364 }
365
366 # uri => path mapping
367 sub map_uri {
368 my $self = shift;
369 my $host = $self->{server_name};
370 my $uri = $self->{uri};
371
372 # some massaging, also makes it more secure
373 $uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge;
374 $uri =~ s%//+%/%g;
375 $uri =~ s%/\.(?=/|$)%%g;
376 1 while $uri =~ s%/[^/]+/\.\.(?=/|$)%%;
377
378 $uri =~ m%^/?\.\.(?=/|$)%
379 and $self->err(400, "bad request");
380
381 $self->{name} = $uri;
382
383 # now do the path mapping
384 $self->{path} = "$::DOCROOT/$host$uri";
385
386 $self->access_check;
387 }
388
389 sub _cgi {
390 my $self = shift;
391 my $path = shift;
392 my $fh;
393
394 # no two-way xxx supported
395 if (0 == fork) {
396 open STDOUT, ">&".fileno($self->{fh});
397 if (chdir $::DOCROOT) {
398 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
399 $ENV{HTTP_HOST} = $self->{server_name};
400 $ENV{HTTP_PORT} = $self->{server_port};
401 $ENV{SCRIPT_NAME} = $self->{name};
402 exec $path;
403 }
404 Coro::State::_exit(0);
405 } else {
406 die;
407 }
408 }
409
410 sub server_hostport {
411 $_[0]{server_port} == 80
412 ? $_[0]{server_name}
413 : "$_[0]{server_name}:$_[0]{server_port}";
414 }
415
416 sub respond {
417 my $self = shift;
418 my $path = $self->{path};
419
420 if ($self->{name} =~ s%^/internal/([^/]+)%%) {
421 if ($::internal{$1}) {
422 $::internal{$1}->($self);
423 } else {
424 $self->err(404, "not found");
425 }
426 } else {
427
428 stat $path
429 or $self->err(404, "not found");
430
431 $self->{stat} = [stat _];
432
433 # idiotic netscape sends idiotic headers AGAIN
434 my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
435 ? str2time $1 : 0;
436
437 if (-d _ && -r _) {
438 # directory
439 if ($path !~ /\/$/) {
440 # create a redirect to get the trailing "/"
441 # we don't try to avoid the :80
442 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
443 } else {
444 $ims < $self->{stat}[9]
445 or $self->err(304, "not modified");
446
447 if (-r "$path/index.html") {
448 # replace directory "size" by index.html filesize
449 $self->{stat} = [stat ($self->{path} .= "/index.html")];
450 $self->handle_file($queue_index);
451 } else {
452 $self->handle_dir;
453 }
454 }
455 } elsif (-f _ && -r _) {
456 -x _ and $self->err(403, "forbidden");
457
458 if (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
459 my $timeout = $::NOW + 10;
460 while (keys %{$conn{$self->{remote_id}}} > $::MAX_TRANSFERS_IP) {
461 if ($timeout < $::NOW) {
462 $self->block($::BLOCKTIME, "too many connections");
463 } else {
464 $httpevent->wait;
465 }
466 }
467 }
468
469 $self->handle_file($queue_file);
470 } else {
471 $self->err(404, "not found");
472 }
473 }
474 }
475
476 sub handle_dir {
477 my $self = shift;
478 my $idx = $self->diridx;
479
480 $self->response(200, "ok",
481 {
482 "Content-Type" => "text/html",
483 "Content-Length" => length $idx,
484 "Last-Modified" => time2str ($self->{stat}[9]),
485 },
486 $idx);
487 }
488
489 sub handle_file {
490 my ($self, $queue) = @_;
491 my $length = $self->{stat}[7];
492 my $hdr = {
493 "Last-Modified" => time2str ((stat _)[9]),
494 };
495
496 my @code = (200, "ok");
497 my ($l, $h);
498
499 if ($self->{h}{range} =~ /^bytes=(.*)$/) {
500 for (split /,/, $1) {
501 if (/^-(\d+)$/) {
502 ($l, $h) = ($length - $1, $length - 1);
503 } elsif (/^(\d+)-(\d*)$/) {
504 ($l, $h) = ($1, ($2 ne "" || $2 >= $length) ? $2 : $length - 1);
505 } else {
506 ($l, $h) = (0, $length - 1);
507 goto ignore;
508 }
509 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
510 }
511 $hdr->{"Content-Range"} = "bytes */$length";
512 $hdr->{"Content-Length"} = $length;
513 $self->err(416, "not satisfiable", $hdr, "");
514
515 satisfiable:
516 # check for segmented downloads
517 if ($l && $::NO_SEGMENTED) {
518 my $timeout = $::NOW + 15;
519 while (keys %{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
520 if ($timeout <= $::NOW) {
521 $self->block($::BLOCKTIME, "segmented downloads are forbidden");
522 #$self->err_segmented_download;
523 } else {
524 $httpevent->wait;
525 }
526 }
527 }
528
529 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
530 @code = (206, "partial content");
531 $length = $h - $l + 1;
532
533 ignore:
534 } else {
535 ($l, $h) = (0, $length - 1);
536 }
537
538 $self->{path} =~ /\.([^.]+)$/;
539 $hdr->{"Content-Type"} = $mimetype{lc $1} || "application/octet-stream";
540 $hdr->{"Content-Length"} = $length;
541
542 $self->response(@code, $hdr, "");
543
544 if ($self->{method} eq "GET") {
545 $self->{time} = $::NOW;
546
547 my $current = $Coro::current;
548
549 my ($fh, $buf, $r);
550
551 open $fh, "<", $self->{path}
552 or die "$self->{path}: late open failure ($!)";
553
554 $h -= $l - 1;
555
556 if (0) { # !AIO
557 if ($l) {
558 sysseek $fh, $l, 0;
559 }
560 }
561
562 my $transfer = $queue->start_transfer($h);
563 my $locked;
564 my $bufsize = $::WAIT_BUFSIZE; # initial buffer size
565
566 while ($h > 0) {
567 unless ($locked) {
568 if ($locked ||= $transfer->try($::WAIT_INTERVAL)) {
569 $bufsize = $::BUFSIZE;
570 $self->{time} = $::NOW;
571 }
572 }
573
574 if ($blocked{$self->{remote_id}}) {
575 $self->{h}{connection} = "close";
576 die bless {}, err::;
577 }
578
579 if (0) { # !AIO
580 sysread $fh, $buf, $h > $bufsize ? $bufsize : $h
581 or last;
582 } else {
583 aio_read($fh, $l, ($h > $bufsize ? $bufsize : $h),
584 $buf, 0, sub {
585 $r = $_[0];
586 Coro::ready($current);
587 });
588 &Coro::schedule;
589 last unless $r;
590 }
591 my $w = syswrite $self->{fh}, $buf
592 or last;
593 $::written += $w;
594 $self->{written} += $w;
595 $l += $r;
596 }
597
598 close $fh;
599 }
600 }
601
602 1;