| 1 |
use Coro; |
| 2 |
use Coro::Semaphore; |
| 3 |
use Coro::Event; |
| 4 |
use Coro::Socket; |
| 5 |
|
| 6 |
no utf8; |
| 7 |
use bytes; |
| 8 |
|
| 9 |
# at least on my machine, this thingy serves files |
| 10 |
# quite a bit faster than apache, ;) |
| 11 |
# and quite a bit slower than thttpd :( |
| 12 |
|
| 13 |
$SIG{PIPE} = 'IGNORE'; |
| 14 |
|
| 15 |
sub slog { |
| 16 |
my $level = shift; |
| 17 |
my $format = shift; |
| 18 |
printf "---: $format\n", @_; |
| 19 |
} |
| 20 |
|
| 21 |
my $connections = new Coro::Semaphore $MAX_CONNECTS; |
| 22 |
|
| 23 |
my @newcons; |
| 24 |
my @pool; |
| 25 |
|
| 26 |
# one "execution thread" |
| 27 |
sub handler { |
| 28 |
while () { |
| 29 |
my $new = pop @newcons; |
| 30 |
if ($new) { |
| 31 |
eval { |
| 32 |
conn->new(@$new)->handle; |
| 33 |
}; |
| 34 |
slog 1, "$@" if $@ && !ref $@; |
| 35 |
$connections->up; |
| 36 |
} else { |
| 37 |
last if @pool >= $MAX_POOL; |
| 38 |
push @pool, $Coro::current; |
| 39 |
schedule; |
| 40 |
} |
| 41 |
} |
| 42 |
} |
| 43 |
|
| 44 |
my $http_port = new Coro::Socket |
| 45 |
LocalAddr => $SERVER_HOST, |
| 46 |
LocalPort => $SERVER_PORT, |
| 47 |
ReuseAddr => 1, |
| 48 |
Listen => 1, |
| 49 |
or die "unable to start server"; |
| 50 |
|
| 51 |
push @listen_sockets, $http_port; |
| 52 |
|
| 53 |
# the "main thread" |
| 54 |
async { |
| 55 |
slog 1, "accepting connections"; |
| 56 |
while () { |
| 57 |
$connections->down; |
| 58 |
push @newcons, [$http_port->accept]; |
| 59 |
#slog 3, "accepted @$connections ".scalar(@pool); |
| 60 |
$::NOW = time; |
| 61 |
if (@pool) { |
| 62 |
(pop @pool)->ready; |
| 63 |
} else { |
| 64 |
async \&handler; |
| 65 |
} |
| 66 |
|
| 67 |
} |
| 68 |
}; |
| 69 |
|
| 70 |
package conn; |
| 71 |
|
| 72 |
use Socket; |
| 73 |
use HTTP::Date; |
| 74 |
use Convert::Scalar 'weaken'; |
| 75 |
|
| 76 |
our %conn; # $conn{ip}{fh} => connobj |
| 77 |
our %blocked; |
| 78 |
|
| 79 |
sub new { |
| 80 |
my $class = shift; |
| 81 |
my $peername = shift; |
| 82 |
my $fh = shift; |
| 83 |
my $self = bless { fh => $fh }, $class; |
| 84 |
my (undef, $iaddr) = unpack_sockaddr_in $peername |
| 85 |
or $self->err(500, "unable to decode peername"); |
| 86 |
|
| 87 |
$self->{remote_addr} = inet_ntoa $iaddr; |
| 88 |
|
| 89 |
# enter ourselves into various lists |
| 90 |
weaken ($conn{$self->{remote_addr}}{$self*1} = $self); |
| 91 |
|
| 92 |
$self; |
| 93 |
} |
| 94 |
|
| 95 |
sub DESTROY { |
| 96 |
my $self = shift; |
| 97 |
delete $conn{$self->{remote_addr}}{$self*1}; |
| 98 |
delete $uri{$self->{uri}}{$self*1}; |
| 99 |
} |
| 100 |
|
| 101 |
sub slog { |
| 102 |
my $self = shift; |
| 103 |
main::slog($_[0], "$self->{remote_addr}> $_[1]"); |
| 104 |
} |
| 105 |
|
| 106 |
sub response { |
| 107 |
my ($self, $code, $msg, $hdr, $content) = @_; |
| 108 |
my $res = "HTTP/1.0 $code $msg\015\012"; |
| 109 |
|
| 110 |
$res .= "Connection: close\015\012"; |
| 111 |
$res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( |
| 112 |
|
| 113 |
while (my ($h, $v) = each %$hdr) { |
| 114 |
$res .= "$h: $v\015\012" |
| 115 |
} |
| 116 |
|
| 117 |
$res .= "\015\012$content" if defined $content; |
| 118 |
|
| 119 |
print STDERR "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";#d# |
| 120 |
|
| 121 |
print {$self->{fh}} $res; |
| 122 |
} |
| 123 |
|
| 124 |
sub err { |
| 125 |
my $self = shift; |
| 126 |
my ($code, $msg, $hdr, $content) = @_; |
| 127 |
|
| 128 |
unless (defined $content) { |
| 129 |
$content = "$code $msg"; |
| 130 |
$hdr->{"Content-Type"} = "text/plain"; |
| 131 |
$hdr->{"Content-Length"} = length $content; |
| 132 |
} |
| 133 |
|
| 134 |
$self->response($code, $msg, $hdr, $content); |
| 135 |
|
| 136 |
die bless {}, err::; |
| 137 |
} |
| 138 |
|
| 139 |
sub err_blocked { |
| 140 |
my $self = shift; |
| 141 |
my $ip = $self->{remote_addr}; |
| 142 |
my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME; |
| 143 |
$self->err(403, "too many connections", |
| 144 |
{ |
| 145 |
"Content-Type" => "text/html", |
| 146 |
"Retry-After" => $::BLOCKTIME |
| 147 |
}, |
| 148 |
<<EOF); |
| 149 |
<html><p> |
| 150 |
You have been blocked because you opened too many connections. You |
| 151 |
may retry at</p> |
| 152 |
|
| 153 |
<p><blockquote>$time.</blockquote></p> |
| 154 |
|
| 155 |
<p>Until then, each new access will renew the block. You might want to have a |
| 156 |
look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p> |
| 157 |
</html> |
| 158 |
EOF |
| 159 |
} |
| 160 |
|
| 161 |
sub handle { |
| 162 |
my $self = shift; |
| 163 |
my $fh = $self->{fh}; |
| 164 |
|
| 165 |
#while() { |
| 166 |
$self->{h} = {}; |
| 167 |
|
| 168 |
# read request and parse first line |
| 169 |
$fh->timeout($::REQ_TIMEOUT); |
| 170 |
my $req = $fh->readline("\015\012\015\012"); |
| 171 |
$fh->timeout($::RES_TIMEOUT); |
| 172 |
|
| 173 |
defined $req or |
| 174 |
$self->err(408, "request timeout"); |
| 175 |
|
| 176 |
my $ip = $self->{remote_addr}; |
| 177 |
|
| 178 |
if ($blocked{$ip}) { |
| 179 |
$self->err_blocked($blocked{$ip}) |
| 180 |
if $blocked{$ip} > $::NOW; |
| 181 |
|
| 182 |
delete $blocked{$ip}; |
| 183 |
} |
| 184 |
|
| 185 |
if (%{$conn{$ip}} > $::MAX_CONN_IP) { |
| 186 |
$self->slog("blocked ip $ip"); |
| 187 |
$self->err_blocked; |
| 188 |
} |
| 189 |
|
| 190 |
$req =~ /^(?:\015\012)? |
| 191 |
(GET|HEAD) \040+ |
| 192 |
([^\040]+) \040+ |
| 193 |
HTTP\/([0-9]+\.[0-9]+) |
| 194 |
\015\012/gx |
| 195 |
or $self->err(403, "method not allowed", { Allow => "GET,HEAD" }); |
| 196 |
|
| 197 |
$2 ne "1.0" |
| 198 |
or $self->err(506, "http protocol version not supported"); |
| 199 |
|
| 200 |
$self->{method} = $1; |
| 201 |
$self->{uri} = $2; |
| 202 |
|
| 203 |
# parse headers |
| 204 |
{ |
| 205 |
my (%hdr, $h, $v); |
| 206 |
|
| 207 |
$hdr{lc $1} .= ",$2" |
| 208 |
while $req =~ /\G |
| 209 |
([^:\000-\040]+): |
| 210 |
[\008\040]* |
| 211 |
((?: [^\015\012]+ | \015\012[\008\040] )*) |
| 212 |
\015\012 |
| 213 |
/gxc; |
| 214 |
|
| 215 |
$req =~ /\G\015\012$/ |
| 216 |
or $self->err(400, "bad request"); |
| 217 |
|
| 218 |
$self->{h}{$h} = substr $v, 1 |
| 219 |
while ($h, $v) = each %hdr; |
| 220 |
} |
| 221 |
|
| 222 |
$self->{server_port} = $self->{h}{host} =~ s/:([0-9]+)$// ? $1 : 80; |
| 223 |
|
| 224 |
weaken ($uri{$self->{uri}}{$self*1} = $self); |
| 225 |
|
| 226 |
$self->map_uri; |
| 227 |
$self->respond; |
| 228 |
#} |
| 229 |
} |
| 230 |
|
| 231 |
# uri => path mapping |
| 232 |
sub map_uri { |
| 233 |
my $self = shift; |
| 234 |
my $host = $self->{h}{host} || "default"; |
| 235 |
my $uri = $self->{uri}; |
| 236 |
|
| 237 |
# some massaging, also makes it more secure |
| 238 |
$uri =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr hex $1/ge; |
| 239 |
$uri =~ s%//+%/%g; |
| 240 |
$uri =~ s%/\.(?=/|$)%%g; |
| 241 |
1 while $uri =~ s%/[^/]+/\.\.(?=/|$)%%; |
| 242 |
|
| 243 |
$uri =~ m%^/?\.\.(?=/|$)% |
| 244 |
and $self->err(400, "bad request"); |
| 245 |
|
| 246 |
$self->{name} = $uri; |
| 247 |
|
| 248 |
# now do the path mapping |
| 249 |
$self->{path} = "$::DOCROOT/$host$uri"; |
| 250 |
|
| 251 |
$self->access_check; |
| 252 |
} |
| 253 |
|
| 254 |
sub server_address { |
| 255 |
my $self = shift; |
| 256 |
my ($port, $iaddr) = unpack_sockaddr_in $self->{fh}->getsockname |
| 257 |
or $self->err(500, "unable to get socket name"); |
| 258 |
((inet_ntoa $iaddr), $port); |
| 259 |
} |
| 260 |
|
| 261 |
sub server_host { |
| 262 |
my $self = shift; |
| 263 |
if (exists $self->{h}{host}) { |
| 264 |
return $self->{h}{host}; |
| 265 |
} else { |
| 266 |
return (($self->server_address)[0]); |
| 267 |
} |
| 268 |
} |
| 269 |
|
| 270 |
sub server_hostport { |
| 271 |
my $self = shift; |
| 272 |
my ($host, $port); |
| 273 |
if (exists $self->{h}{host}) { |
| 274 |
($host, $port) = ($self->{h}{host}, $self->{server_port}); |
| 275 |
} else { |
| 276 |
($host, $port) = $self->server_address; |
| 277 |
} |
| 278 |
$port = $port == 80 ? "" : ":$port"; |
| 279 |
$host.$port; |
| 280 |
} |
| 281 |
|
| 282 |
sub _cgi { |
| 283 |
my $self = shift; |
| 284 |
my $path = shift; |
| 285 |
my $fh; |
| 286 |
|
| 287 |
# no two-way xxx supported |
| 288 |
if (0 == fork) { |
| 289 |
open STDOUT, ">&".fileno($self->{fh}); |
| 290 |
if (chdir $::DOCROOT) { |
| 291 |
$ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike |
| 292 |
$ENV{HTTP_HOST} = $self->server_host; |
| 293 |
$ENV{HTTP_PORT} = $self->{server_host}; |
| 294 |
$ENV{SCRIPT_NAME} = $self->{name}; |
| 295 |
exec $::INDEXPROG; |
| 296 |
} |
| 297 |
Coro::State::_exit(0); |
| 298 |
} else { |
| 299 |
} |
| 300 |
} |
| 301 |
|
| 302 |
sub respond { |
| 303 |
my $self = shift; |
| 304 |
my $path = $self->{path}; |
| 305 |
|
| 306 |
stat $path |
| 307 |
or $self->err(404, "not found"); |
| 308 |
|
| 309 |
# idiotic netscape sends idiotic headers AGAIN |
| 310 |
my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/ |
| 311 |
? str2time $1 : 0; |
| 312 |
|
| 313 |
if (-d _ && -r _) { |
| 314 |
# directory |
| 315 |
if ($path !~ /\/$/) { |
| 316 |
# create a redirect to get the trailing "/" |
| 317 |
my $host = $self->server_hostport; |
| 318 |
$self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); |
| 319 |
} else { |
| 320 |
$ims < (stat _)[9] |
| 321 |
or $self->err(304, "not modified"); |
| 322 |
|
| 323 |
if ($self->{method} eq "GET") { |
| 324 |
if (-r "$path/index.html") { |
| 325 |
$self->{path} .= "/index.html"; |
| 326 |
$self->handle_file; |
| 327 |
} else { |
| 328 |
$self->handle_dir; |
| 329 |
} |
| 330 |
} |
| 331 |
} |
| 332 |
} elsif (-f _ && -r _) { |
| 333 |
-x _ and $self->err(403, "forbidden"); |
| 334 |
$self->handle_file; |
| 335 |
} else { |
| 336 |
$self->err(404, "not found"); |
| 337 |
} |
| 338 |
} |
| 339 |
|
| 340 |
sub handle_dir { |
| 341 |
my $self = shift; |
| 342 |
$self->_cgi($::INDEXPROG); |
| 343 |
} |
| 344 |
|
| 345 |
sub handle_file { |
| 346 |
my $self = shift; |
| 347 |
my $length = -s _; |
| 348 |
my $hdr = { |
| 349 |
"Last-Modified" => time2str ((stat _)[9]), |
| 350 |
}; |
| 351 |
|
| 352 |
my @code = (200, "ok"); |
| 353 |
my ($l, $h); |
| 354 |
|
| 355 |
if ($self->{h}{range} =~ /^bytes=(.*)$/) { |
| 356 |
for (split /,/, $1) { |
| 357 |
if (/^-(\d+)$/) { |
| 358 |
($l, $h) = ($length - $1, $length - 1); |
| 359 |
} elsif (/^(\d+)-(\d*)$/) { |
| 360 |
($l, $h) = ($1, ($2 ne "" || $2 >= $length) ? $2 : $length - 1); |
| 361 |
} else { |
| 362 |
($l, $h) = (0, $length - 1); |
| 363 |
goto ignore; |
| 364 |
} |
| 365 |
goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h > $l; |
| 366 |
} |
| 367 |
$hdr->{"Content-Range"} = "bytes */$length"; |
| 368 |
$self->err(416, "not satisfiable", $hdr); |
| 369 |
|
| 370 |
satisfiable: |
| 371 |
# check for segmented downloads |
| 372 |
if ($l && $NO_SEGMENTED) { |
| 373 |
if (%{$uri{$self->{uri}}} > 1) { |
| 374 |
$self->slog("segmented download refused\n"); |
| 375 |
$self->err(400, "segmented downloads are not allowed"); |
| 376 |
} |
| 377 |
} |
| 378 |
|
| 379 |
$hdr->{"Content-Range"} = "bytes $l-$h/$length"; |
| 380 |
@code = (206, "partial content"); |
| 381 |
$length = $h - $l + 1; |
| 382 |
|
| 383 |
ignore: |
| 384 |
} else { |
| 385 |
($l, $h) = (0, $length - 1); |
| 386 |
} |
| 387 |
|
| 388 |
if ($self->{path} =~ /\.html$/) { |
| 389 |
$hdr->{"Content-Type"} = "text/html"; |
| 390 |
} else { |
| 391 |
$hdr->{"Content-Type"} = "application/octet-stream"; |
| 392 |
} |
| 393 |
|
| 394 |
$hdr->{"Content-Length"} = $length; |
| 395 |
|
| 396 |
$self->response(@code, $hdr, ""); |
| 397 |
|
| 398 |
if ($self->{method} eq "GET") { |
| 399 |
my ($fh, $buf); |
| 400 |
open $fh, "<", $self->{path} |
| 401 |
or die "$self->{path}: late open failure ($!)"; |
| 402 |
|
| 403 |
if ($l) { |
| 404 |
sysseek $fh, $l, 0 |
| 405 |
or die "$self->{path}: cannot seek to $l ($!)"; |
| 406 |
} |
| 407 |
|
| 408 |
$h -= $l - 1; |
| 409 |
|
| 410 |
while ($h > 0) { |
| 411 |
$h -= sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h; |
| 412 |
$self->{fh}->syswrite($buf) |
| 413 |
or last; |
| 414 |
} |
| 415 |
} |
| 416 |
|
| 417 |
close $fh; |
| 418 |
} |
| 419 |
|
| 420 |
1; |
