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Comparing Coro/myhttpd/httpd.pl (file contents):
Revision 1.4 by root, Fri Aug 10 04:16:41 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;
22 33
23my @fh; 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);
40
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 $fh = pop @fh; 47 if (@newcons) {
30 if ($fh) {
31 eval { 48 eval {
32 conn->new($fh)->handle; 49 conn->new(@{pop @newcons})->handle;
33 }; 50 };
34 close $fh;
35 slog 1, "$@" if $@ && !ref $@; 51 slog 1, "$@" if $@ && !ref $@;
36 $connections->up; 52 $connections->up;
37 } else { 53 } else {
38 last if @pool >= $MAX_POOL; 54 last if @pool >= $MAX_POOL;
39 push @pool, $Coro::current; 55 push @pool, $Coro::current;
… …
44 60
45my $http_port = new Coro::Socket 61my $http_port = new Coro::Socket
46 LocalAddr => $SERVER_HOST, 62 LocalAddr => $SERVER_HOST,
47 LocalPort => $SERVER_PORT, 63 LocalPort => $SERVER_PORT,
48 ReuseAddr => 1, 64 ReuseAddr => 1,
49 Listen => 1, 65 Listen => 50,
50 or die "unable to start server"; 66 or die "unable to start server";
51 67
52push @listen_sockets, $http_port; 68push @listen_sockets, $http_port;
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;
53 77
54# the "main thread" 78# the "main thread"
55async { 79async {
56 slog 1, "accepting connections"; 80 slog 1, "accepting connections";
57 while () { 81 while () {
58 $connections->down; 82 $connections->down;
59 push @fh, $http_port->accept; 83 push @newcons, [$http_port->accept];
60 #slog 3, "accepted @$connections ".scalar(@pool); 84 #slog 3, "accepted @$connections ".scalar(@pool);
61 $::NOW = time;
62 if (@pool) { 85 if (@pool) {
63 (pop @pool)->ready; 86 (pop @pool)->ready;
64 } else { 87 } else {
65 async \&handler; 88 async \&handler;
66 } 89 }
… …
71package conn; 94package conn;
72 95
73use Socket; 96use Socket;
74use HTTP::Date; 97use HTTP::Date;
75use Convert::Scalar 'weaken'; 98use Convert::Scalar 'weaken';
99use Linux::AIO;
76 100
101Linux::AIO::min_parallel $::AIO_PARALLEL;
102
103Event->io(fd => Linux::AIO::poll_fileno,
104 poll => 'r', async => 1,
105 cb => \&Linux::AIO::poll_cb);
106
77our %conn; # $conn{ip}{fh} => connobj 107our %conn; # $conn{ip}{self} => connobj
108our %uri; # $uri{ip}{uri}{self}
78our %blocked; 109our %blocked;
110our %mimetype;
111
112sub read_mimetypes {
113 local *M;
114 if (open M, "<mime_types") {
115 while (<M>) {
116 if (/^([^#]\S+)\t+(\S+)$/) {
117 $mimetype{lc $1} = $2;
118 }
119 }
120 } else {
121 print "cannot open mime_types\n";
122 }
123}
124
125read_mimetypes;
79 126
80sub new { 127sub new {
81 my $class = shift; 128 my $class = shift;
129 my $peername = shift;
82 my $fh = shift; 130 my $fh = shift;
83 my $self = bless { fh => $fh }, $class; 131 my $self = bless { fh => $fh }, $class;
84 my (undef, $iaddr) = unpack_sockaddr_in $fh->getpeername 132 my (undef, $iaddr) = unpack_sockaddr_in $peername
85 or $self->err(500, "unable to get peername"); 133 or $self->err(500, "unable to decode peername");
134
86 $self->{remote_addr} = inet_ntoa $iaddr; 135 $self->{remote_addr} = inet_ntoa $iaddr;
136 $self->{time} = $::NOW;
87 137
88 # enter ourselves into various lists 138 $::conns++;
89 weaken ($conn{$self->{remote_addr}}{$self*1} = $self);
90 139
91 $self; 140 $self;
92} 141}
93 142
94sub DESTROY { 143sub DESTROY {
95 my $self = shift; 144 my $self = shift;
145 $::conns--;
146 $self->eoconn;
147}
148
149# end of connection
150sub eoconn {
151 my $self = shift;
152
153 # clean up hints
96 delete $conn{$self->{remote_addr}}{$self*1}; 154 delete $conn{$self->{remote_id}}{$self*1};
97 delete $uri{$self->{uri}}{$self*1}; 155 delete $uri{$self->{remote_id}}{$self->{uri}}{$self*1};
98} 156}
99 157
100sub slog { 158sub slog {
101 my $self = shift; 159 my $self = shift;
102 main::slog($_[0], "$self->{remote_addr}> $_[1]"); 160 main::slog($_[0], ($self->{remote_id} || $self->{remote_addr}) ."> $_[1]");
103} 161}
104 162
105sub response { 163sub response {
106 my ($self, $code, $msg, $hdr, $content) = @_; 164 my ($self, $code, $msg, $hdr, $content) = @_;
107 my $res = "HTTP/1.0 $code $msg\015\012"; 165 my $res = "HTTP/1.1 $code $msg\015\012";
108 166
109 $res .= "Connection: close\015\012"; 167 $self->{h}{connection} ||= $hdr->{Connection};
110 $res .= "Date: ".(time2str $::NOW)."\015\012"; # slow? nah. :( 168
169 $res .= "Date: $HTTP_NOW\015\012";
111 170
112 while (my ($h, $v) = each %$hdr) { 171 while (my ($h, $v) = each %$hdr) {
113 $res .= "$h: $v\015\012" 172 $res .= "$h: $v\015\012"
114 } 173 }
174 $res .= "\015\012";
115 175
116 $res .= "\015\012$content" if defined $content; 176 $res .= $content if defined $content and $self->{method} ne "HEAD";
117 177
118 print STDERR "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";#d# 178 my $log = "$self->{remote_addr} \"$self->{uri}\" $code ".$hdr->{"Content-Length"}." \"$self->{h}{referer}\"\n";
119 179
180 print $accesslog $log if $accesslog;
181 print STDERR $log;
182
183 $self->{written} +=
120 print {$self->{fh}} $res; 184 print {$self->{fh}} $res;
121} 185}
122 186
123sub err { 187sub err {
124 my $self = shift; 188 my $self = shift;
125 my ($code, $msg, $hdr, $content) = @_; 189 my ($code, $msg, $hdr, $content) = @_;
126 190
127 unless (defined $content) { 191 unless (defined $content) {
128 $content = "$code $msg"; 192 $content = "$code $msg\n";
129 $hdr->{"Content-Type"} = "text/plain"; 193 $hdr->{"Content-Type"} = "text/plain";
130 $hdr->{"Content-Length"} = length $content; 194 $hdr->{"Content-Length"} = length $content;
131 } 195 }
196 $hdr->{"Connection"} = "close";
132 197
133 $self->response($code, $msg, $hdr, $content); 198 $self->response($code, $msg, $hdr, $content);
134 199
135 die bless {}, err::; 200 die bless {}, err::;
136} 201}
137 202
138sub err_blocked {
139 my $self = shift;
140 my $ip = $self->{remote_addr};
141 my $time = time2str $blocked{$ip} = $::NOW + $::BLOCKTIME;
142 $self->err(403, "too many connections",
143 {
144 "Content-Type" => "text/html",
145 "Retry-After" => $::BLOCKTIME
146 },
147 <<EOF);
148<html><p>
149You have been blocked because you opened too many connections. You
150may retry at</p>
151
152 <p><blockquote>$time.</blockquote></p>
153
154<p>Until then, each new access will renew the block. You might want to have a
155look at the <a href="http://www.goof.com/pcg/marc/animefaq.html">FAQ</a>.</p>
156</html>
157EOF
158}
159
160sub handle { 203sub handle {
161 my $self = shift; 204 my $self = shift;
162 my $fh = $self->{fh}; 205 my $fh = $self->{fh};
163 206
207 my $host;
208
209 $fh->timeout($::REQ_TIMEOUT);
164 #while() { 210 while() {
211 $self->{reqs}++;
212
213 # read request and parse first line
214 my $req = $fh->readline("\015\012\015\012");
215
216 unless (defined $req) {
217 if (exists $self->{version}) {
218 last;
219 } else {
220 $self->err(408, "request timeout");
221 }
222 }
223
165 $self->{h} = {}; 224 $self->{h} = {};
166 225
167 # read request and parse first line
168 $fh->timeout($::REQ_TIMEOUT);
169 my $req = $fh->readline("\015\012\015\012");
170 $fh->timeout($::RES_TIMEOUT); 226 $fh->timeout($::RES_TIMEOUT);
171
172 defined $req or
173 $self->err(408, "request timeout");
174
175 my $ip = $self->{remote_addr};
176
177 if ($blocked{$ip}) {
178 $self->err_blocked($blocked{$ip})
179 if $blocked{$ip} > $::NOW;
180
181 delete $blocked{$ip};
182 }
183
184 if (%{$conn{$ip}} > $::MAX_CONN_IP) {
185 $self->slog("blocked ip $ip");
186 $self->err_blocked;
187 }
188 227
189 $req =~ /^(?:\015\012)? 228 $req =~ /^(?:\015\012)?
190 (GET|HEAD) \040+ 229 (GET|HEAD) \040+
191 ([^\040]+) \040+ 230 ([^\040]+) \040+
192 HTTP\/([0-9]+\.[0-9]+) 231 HTTP\/([0-9]+\.[0-9]+)
193 \015\012/gx 232 \015\012/gx
194 or $self->err(403, "method not allowed", { Allow => "GET,HEAD" }); 233 or $self->err(405, "method not allowed", { Allow => "GET,HEAD" });
195
196 $2 ne "1.0"
197 or $self->err(506, "http protocol version not supported");
198 234
199 $self->{method} = $1; 235 $self->{method} = $1;
200 $self->{uri} = $2; 236 $self->{uri} = $2;
237 $self->{version} = $3;
238
239 $3 =~ /^1\./
240 or $self->err(506, "http protocol version $3 not supported");
201 241
202 # parse headers 242 # parse headers
203 { 243 {
204 my (%hdr, $h, $v); 244 my (%hdr, $h, $v);
205 245
… …
216 256
217 $self->{h}{$h} = substr $v, 1 257 $self->{h}{$h} = substr $v, 1
218 while ($h, $v) = each %hdr; 258 while ($h, $v) = each %hdr;
219 } 259 }
220 260
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) {
221 $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 }
222 306
307 $self->{server_name} = $host;
308
309 # enter ourselves into various lists
310 weaken ($conn{$id}{$self*1} = $self);
223 weaken ($uri{$self->{uri}}{$self*1} = $self); 311 weaken ($uri{$id}{$self->{uri}}{$self*1} = $self);
224 312
313 eval {
225 $self->map_uri; 314 $self->map_uri;
226
227 Coro::Event::do_timer(after => 5);
228
229 $self->respond; 315 $self->respond;
316 };
317
318 $self->eoconn;
319
320 die if $@ && !ref $@;
321
322 last if $self->{h}{connection} =~ /close/ || $self->{version} < 1.1;
323
324 $fh->timeout($::PER_TIMEOUT);
230 #} 325 }
231} 326}
232 327
233# uri => path mapping 328# uri => path mapping
234sub map_uri { 329sub map_uri {
235 my $self = shift; 330 my $self = shift;
236 my $host = $self->{h}{host} || "default"; 331 my $host = $self->{server_name};
237 my $uri = $self->{uri}; 332 my $uri = $self->{uri};
238 333
239 # some massaging, also makes it more secure 334 # some massaging, also makes it more secure
240 $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;
241 $uri =~ s%//+%/%g; 336 $uri =~ s%//+%/%g;
… …
247 342
248 $self->{name} = $uri; 343 $self->{name} = $uri;
249 344
250 # now do the path mapping 345 # now do the path mapping
251 $self->{path} = "$::DOCROOT/$host$uri"; 346 $self->{path} = "$::DOCROOT/$host$uri";
252}
253 347
254sub server_address { 348 $self->access_check;
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
261sub 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
270sub 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} 349}
281 350
282sub _cgi { 351sub _cgi {
283 my $self = shift; 352 my $self = shift;
284 my $path = shift; 353 my $path = shift;
… …
287 # no two-way xxx supported 356 # no two-way xxx supported
288 if (0 == fork) { 357 if (0 == fork) {
289 open STDOUT, ">&".fileno($self->{fh}); 358 open STDOUT, ">&".fileno($self->{fh});
290 if (chdir $::DOCROOT) { 359 if (chdir $::DOCROOT) {
291 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike 360 $ENV{SERVER_SOFTWARE} = "thttpd-myhttpd"; # we are thttpd-alike
292 $ENV{HTTP_HOST} = $self->server_host; 361 $ENV{HTTP_HOST} = $self->{server_name};
293 $ENV{HTTP_PORT} = $self->{server_host}; 362 $ENV{HTTP_PORT} = $self->{server_port};
294 $ENV{SCRIPT_NAME} = $self->{name}; 363 $ENV{SCRIPT_NAME} = $self->{name};
295 exec $::INDEXPROG; 364 exec $path;
296 } 365 }
297 Coro::State::_exit(0); 366 Coro::State::_exit(0);
298 } else { 367 } else {
368 die;
299 } 369 }
370}
371
372sub server_hostport {
373 $_[0]{server_port} == 80
374 ? $_[0]{server_name}
375 : "$_[0]{server_name}:$_[0]{server_port}";
300} 376}
301 377
302sub respond { 378sub respond {
303 my $self = shift; 379 my $self = shift;
304 my $path = $self->{path}; 380 my $path = $self->{path};
305 381
306 stat $path 382 stat $path
307 or $self->err(404, "not found"); 383 or $self->err(404, "not found");
384
385 $self->{stat} = [stat _];
308 386
309 # idiotic netscape sends idiotic headers AGAIN 387 # idiotic netscape sends idiotic headers AGAIN
310 my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/ 388 my $ims = $self->{h}{"if-modified-since"} =~ /^([^;]+)/
311 ? str2time $1 : 0; 389 ? str2time $1 : 0;
312 390
313 if (-d _ && -r _) { 391 if (-d _ && -r _) {
314 # directory 392 # directory
315 if ($path !~ /\/$/) { 393 if ($path !~ /\/$/) {
316 # create a redirect to get the trailing "/" 394 # create a redirect to get the trailing "/"
317 my $host = $self->server_hostport; 395 # we don't try to avoid the :80
318 $self->err(301, "moved permanently", { Location => "http://$host$self->{uri}/" }); 396 $self->err(301, "moved permanently", { Location => "http://".$self->server_hostport."$self->{uri}/" });
319 } else { 397 } else {
320 $ims < (stat _)[9] 398 $ims < $self->{stat}[9]
321 or $self->err(304, "not modified"); 399 or $self->err(304, "not modified");
322 400
323 if ($self->{method} eq "GET") {
324 if (-r "$path/index.html") { 401 if (-r "$path/index.html") {
325 $self->{path} .= "/index.html"; 402 $self->{path} .= "/index.html";
326 $self->handle_file; 403 $self->handle_file;
327 } else { 404 } else {
328 $self->handle_dir; 405 $self->handle_dir;
329 }
330 } 406 }
331 } 407 }
332 } elsif (-f _ && -r _) { 408 } elsif (-f _ && -r _) {
333 -x _ and $self->err(403, "forbidden"); 409 -x _ and $self->err(403, "forbidden");
334 $self->handle_file; 410 $self->handle_file;
… …
337 } 413 }
338} 414}
339 415
340sub handle_dir { 416sub handle_dir {
341 my $self = shift; 417 my $self = shift;
342 $self->_cgi($::INDEXPROG); 418 my $idx = $self->diridx;
419
420 $self->response(200, "ok",
421 {
422 "Content-Type" => "text/html",
423 "Content-Length" => length $idx,
424 },
425 $idx);
343} 426}
344 427
345sub handle_file { 428sub handle_file {
346 my $self = shift; 429 my $self = shift;
347 my $length = -s _; 430 my $length = $self->{stat}[7];
431 my $queue = $::transfers[$length >= $::TRANSFER_SMALL];
348 my $hdr = { 432 my $hdr = {
349 "Last-Modified" => time2str ((stat _)[9]), 433 "Last-Modified" => time2str ((stat _)[9]),
350 }; 434 };
351 435
352 my @code = (200, "ok"); 436 my @code = (200, "ok");
… …
360 ($l, $h) = ($1, ($2 ne "" || $2 >= $length) ? $2 : $length - 1); 444 ($l, $h) = ($1, ($2 ne "" || $2 >= $length) ? $2 : $length - 1);
361 } else { 445 } else {
362 ($l, $h) = (0, $length - 1); 446 ($l, $h) = (0, $length - 1);
363 goto ignore; 447 goto ignore;
364 } 448 }
365 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h > $l; 449 goto satisfiable if $l >= 0 && $l < $length && $h >= 0 && $h >= $l;
366 } 450 }
367 $hdr->{"Content-Range"} = "bytes */$length"; 451 $hdr->{"Content-Range"} = "bytes */$length";
452 $hdr->{"Content-Length"} = $length;
368 $self->err(416, "not satisfiable", $hdr); 453 $self->err(416, "not satisfiable", $hdr, "");
369 454
370satisfiable: 455satisfiable:
371 # check for segmented downloads 456 # check for segmented downloads
372 if ($l && $NO_SEGMENTED) { 457 if ($l && $::NO_SEGMENTED) {
458 my $delay = $::PER_TIMEOUT + 15;
373 if (%{$uri{$self->{uri}}} > 1) { 459 while (%{$uri{$self->{remote_id}}{$self->{uri}}} > 1) {
374 $self->slog("segmented download refused\n"); 460 if ($delay <= 0) {
375 $self->err(400, "segmented downloads are not allowed"); 461 $self->err_segmented_download;
462 } else {
463 Coro::Event::do_timer(after => 4); $delay -= 4;
464 }
376 } 465 }
377 } 466 }
378 467
379 $hdr->{"Content-Range"} = "bytes $l-$h/$length"; 468 $hdr->{"Content-Range"} = "bytes $l-$h/$length";
380 @code = (206, "partial content"); 469 @code = (206, "partial content");
… …
383ignore: 472ignore:
384 } else { 473 } else {
385 ($l, $h) = (0, $length - 1); 474 ($l, $h) = (0, $length - 1);
386 } 475 }
387 476
388 if ($self->{path} =~ /\.html$/) { 477 $self->{path} =~ /\.([^.]+)$/;
389 $hdr->{"Content-Type"} = "text/html";
390 } else {
391 $hdr->{"Content-Type"} = "application/octet-stream"; 478 $hdr->{"Content-Type"} = $mimetype{lc $1} || "application/octet-stream";
392 }
393
394 $hdr->{"Content-Length"} = $length; 479 $hdr->{"Content-Length"} = $length;
395 480
396 $self->response(@code, $hdr, ""); 481 $self->response(@code, $hdr, "");
397 482
398 if ($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 $self->{fh}->writable or return;
500
399 my ($fh, $buf); 501 my ($fh, $buf, $r);
502 my $current = $Coro::current;
400 open $fh, "<", $self->{path} 503 open $fh, "<", $self->{path}
401 or die "$self->{path}: late open failure ($!)"; 504 or die "$self->{path}: late open failure ($!)";
402 505
403 if ($l) {
404 sysseek $fh, $l, 0
405 or die "$self->{path}: cannot seek to $l ($!)";
406 }
407
408 $h -= $l - 1; 506 $h -= $l - 1;
409 507
508 if (0) {
509 if ($l) {
510 sysseek $fh, $l, 0;
511 }
512 }
513
410 while ($h > 0) { 514 while ($h > 0) {
411 $h -= sysread $fh, $buf, $h > 16384 ? 16384 : $h; 515 if (0) {
412 print {$self->{fh}} $buf 516 sysread $fh, $buf, $h > $::BUFSIZE ? $::BUFSIZE : $h
517 or last;
518 } else {
519 aio_read($fh, $l, ($h > $::BUFSIZE ? $::BUFSIZE : $h),
520 $buf, 0, sub {
521 $r = $_[0];
522 Coro::ready($current);
523 });
524 &Coro::schedule;
525 last unless $r;
526 }
527 my $w = syswrite $self->{fh}, $buf
413 or last; 528 or last;
414 cede; 529 $::written += $w;
530 $self->{written} += $w;
531 $l += $r;
415 } 532 }
416 }
417 533
418 close $fh; 534 close $fh;
535 }
419} 536}
420 537
4211; 5381;

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