| 1 |
/********************************************************************\
|
| 2 |
* Axel -- A lighter download accelerator for Linux and other Unices. *
|
| 3 |
* *
|
| 4 |
* Copyright 2001 Wilmer van der Gaast *
|
| 5 |
\********************************************************************/
|
| 6 |
|
| 7 |
/* Main control */
|
| 8 |
|
| 9 |
/*
|
| 10 |
This program is free software; you can redistribute it and/or modify
|
| 11 |
it under the terms of the GNU General Public License as published by
|
| 12 |
the Free Software Foundation; either version 2 of the License, or
|
| 13 |
(at your option) any later version.
|
| 14 |
|
| 15 |
This program is distributed in the hope that it will be useful,
|
| 16 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 17 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 18 |
GNU General Public License for more details.
|
| 19 |
|
| 20 |
You should have received a copy of the GNU General Public License with
|
| 21 |
the Debian GNU/Linux distribution in file /usr/doc/copyright/GPL;
|
| 22 |
if not, write to the Free Software Foundation, Inc., 59 Temple Place,
|
| 23 |
Suite 330, Boston, MA 02111-1307 USA
|
| 24 |
*/
|
| 25 |
|
| 26 |
#include "axel.h"
|
| 27 |
|
| 28 |
static void axel_prepare(axel_t* axel);
|
| 29 |
static void axel_teardown(axel_t* axel);
|
| 30 |
static void axel_save_state(axel_t* axel);
|
| 31 |
static void axel_set_state(axel_t* axel, int state);
|
| 32 |
static void axel_update_display(const axel_t* axel);
|
| 33 |
|
| 34 |
/**
|
| 35 |
* Add a URL. urlstr is a pointer to a string specified by the user
|
| 36 |
* @param priority The priority of this URL. If not URL_PRIO_NONE, this overwrites any priority in the URL.
|
| 37 |
* @return 1 iff the URL was added
|
| 38 |
*/
|
| 39 |
_Bool axel_addurlstr(axel_t* axel, const char* urlstr, int priority) {
|
| 40 |
url_t* url = url_parse_heuristic(urlstr);
|
| 41 |
|
| 42 |
if (url == NULL) {
|
| 43 |
return 0;
|
| 44 |
}
|
| 45 |
|
| 46 |
if (priority != URL_PRIO_NONE) {
|
| 47 |
url->priority = priority;
|
| 48 |
}
|
| 49 |
|
| 50 |
urllist_add(axel->urls, url);
|
| 51 |
|
| 52 |
return 1;
|
| 53 |
}
|
| 54 |
|
| 55 |
void axel_init(axel_t* ax, const conf_t* conf) {
|
| 56 |
ax->message_handler = NULL;
|
| 57 |
ax->display_handler = NULL;
|
| 58 |
|
| 59 |
ax->conf = conf;
|
| 60 |
urllist_init(ax->urls);
|
| 61 |
|
| 62 |
ax->conncount = -1;
|
| 63 |
// conn is set once we know conncount
|
| 64 |
|
| 65 |
ax->filename = NULL;
|
| 66 |
ax->outfd = -1;
|
| 67 |
|
| 68 |
ax->statefilename = NULL;
|
| 69 |
|
| 70 |
ax->size = -1;
|
| 71 |
// start_utime is set once we're ready to start downloading
|
| 72 |
|
| 73 |
ax->state = AXEL_STATE_INIT;
|
| 74 |
|
| 75 |
ax->delay_time = 0;
|
| 76 |
}
|
| 77 |
|
| 78 |
void axel_destroy(axel_t* axel) {
|
| 79 |
urllist_destroy(axel->urls);
|
| 80 |
|
| 81 |
free(axel->filename);
|
| 82 |
free(axel->statefilename);
|
| 83 |
}
|
| 84 |
|
| 85 |
/**
|
| 86 |
* Download a file. If you want to know anything more about the download, register handlers.
|
| 87 |
* While the download is running, the current thread will dispatch the callback functions
|
| 88 |
* Afterwards, a program has still to call axel_destroy() and then exit.
|
| 89 |
* @return 0 on success, an error code otherwise
|
| 90 |
*/
|
| 91 |
int axel_download(axel_t* axel) {
|
| 92 |
axel_prepare(axel);
|
| 93 |
|
| 94 |
if (axel->state != AXEL_STATE_DOWNLOADING) {
|
| 95 |
axel_set_state(axel, AXEL_STATE_ERROR);
|
| 96 |
|
| 97 |
return axel->state;
|
| 98 |
}
|
| 99 |
|
| 100 |
|
| 101 |
for (int cid = 0;;cid = (cid < axel->conncount) ? cid + 1 : 0) {
|
| 102 |
// Main loop, visit all connections
|
| 103 |
|
| 104 |
|
| 105 |
|
| 106 |
|
| 107 |
}
|
| 108 |
|
| 109 |
|
| 110 |
// TODO set state to finished if not erred
|
| 111 |
|
| 112 |
|
| 113 |
return axel->state;
|
| 114 |
}
|
| 115 |
|
| 116 |
/**
|
| 117 |
* Prepare a download, start all threads
|
| 118 |
*/
|
| 119 |
static void axel_prepare(axel_t* axel) {
|
| 120 |
// TODO Determine file name
|
| 121 |
// TODO determine file size
|
| 122 |
|
| 123 |
|
| 124 |
if (axel->filename == NULL) {
|
| 125 |
axel->filename = safe_strdup(axel->conf->default_filename);
|
| 126 |
}
|
| 127 |
|
| 128 |
// TODO Open outfile
|
| 129 |
|
| 130 |
|
| 131 |
// Determine state file name
|
| 132 |
const size_t SUFFIXLEN = strlen(STATEFILE_SUFFIX);
|
| 133 |
size_t fnlen = strlen(axel->filename);
|
| 134 |
axel->statefilename = malloc(fnlen + SUFFIXLEN + 1);
|
| 135 |
memcpy(axel->statefilename + fnlen, STATEFILE_SUFFIX, SUFFIXLEN);
|
| 136 |
axel->statefilename[fnlen + SUFFIXLEN + SUFFIXLEN] = '\0';
|
| 137 |
|
| 138 |
// Start counting time
|
| 139 |
axel->start_utime = getutime();
|
| 140 |
axel_set_state(axel, AXEL_STATE_DOWNLOADING);
|
| 141 |
|
| 142 |
// TODO start threads
|
| 143 |
// TODO set conncount according to conf
|
| 144 |
}
|
| 145 |
|
| 146 |
/**
|
| 147 |
* Prepare axel to be freed (cancel all connections, close outfile etc.)
|
| 148 |
*/
|
| 149 |
static void axel_teardown(axel_t* axel) {
|
| 150 |
// TODO Cancel all remaining connections
|
| 151 |
|
| 152 |
|
| 153 |
// TODO Close outfile
|
| 154 |
}
|
| 155 |
|
| 156 |
/**
|
| 157 |
* @param message The message to send. Note that this must be freed by the caller
|
| 158 |
*/
|
| 159 |
void axel_message(const axel_t* axel, int verbosity, const char* message) {
|
| 160 |
if (axel->message_handler != NULL) {
|
| 161 |
axel->message_handler(axel, verbosity, message);
|
| 162 |
}
|
| 163 |
axel_update_display();
|
| 164 |
}
|
| 165 |
|
| 166 |
void axel_message_fmt(const axel_t *axel, int verbosity, const char *format, ...) {
|
| 167 |
const MAX_MSG_SIZE = 1024;
|
| 168 |
char* buf = alloca(MAX_MSG_SIZE);
|
| 169 |
|
| 170 |
va_list params;
|
| 171 |
va_start(params, format);
|
| 172 |
vsnprintf(buf, MAX_MSG_SIZE, format, params );
|
| 173 |
va_end(params);
|
| 174 |
|
| 175 |
axel_message(axel, verbosity, buf);
|
| 176 |
|
| 177 |
free(buf);
|
| 178 |
}
|
| 179 |
|
| 180 |
static void axel_update_display(const axel_t* axel) {
|
| 181 |
if (axel->display_handler != NULL) {
|
| 182 |
axel->display_handler(axel);
|
| 183 |
}
|
| 184 |
}
|
| 185 |
|
| 186 |
static void axel_set_state(axel_t* axel, int state) {
|
| 187 |
axel->state = state;
|
| 188 |
axel_update_display();
|
| 189 |
}
|
| 190 |
|
| 191 |
void axel_save_state(axel_t* axel) {
|
| 192 |
// TODO copy stuff from save_state, sanitize
|
| 193 |
}
|
| 194 |
|
| 195 |
|
| 196 |
|
| 197 |
|
| 198 |
|
| 199 |
|
| 200 |
|
| 201 |
|
| 202 |
|
| 203 |
|
| 204 |
|
| 205 |
|
| 206 |
|
| 207 |
|
| 208 |
|
| 209 |
/* Create a new axel_t structure */
|
| 210 |
axel_t *axel_new( conf_t *conf, int count, void *url )
|
| 211 |
{
|
| 212 |
search_t *res;
|
| 213 |
axel_t *axel;
|
| 214 |
url_t *u;
|
| 215 |
char *s;
|
| 216 |
int i;
|
| 217 |
|
| 218 |
axel = malloc( sizeof( axel_t ) );
|
| 219 |
memset( axel, 0, sizeof( axel_t ) );
|
| 220 |
*axel->conf = *conf;
|
| 221 |
axel->conn = malloc( sizeof( conn_t ) * axel->conf->num_connections );
|
| 222 |
memset( axel->conn, 0, sizeof( conn_t ) * axel->conf->num_connections );
|
| 223 |
if( axel->conf->max_speed > 0 )
|
| 224 |
{
|
| 225 |
if( (float) axel->conf->max_speed / axel->conf->buffer_size < 0.5 )
|
| 226 |
{
|
| 227 |
axel_message( axel, VERBOSITY_NORMAL, _("Buffer resized for this speed."));
|
| 228 |
axel->conf->buffer_size = axel->conf->max_speed;
|
| 229 |
}
|
| 230 |
axel->delay_time = (int) ( (float) 1000000 / axel->conf->max_speed * axel->conf->buffer_size * axel->conf->num_connections );
|
| 231 |
}
|
| 232 |
if( buffer == NULL )
|
| 233 |
buffer = malloc( max( MAX_STRING, axel->conf->buffer_size ) );
|
| 234 |
|
| 235 |
if( count == 0 )
|
| 236 |
{
|
| 237 |
axel->url = malloc( sizeof( url_t ) );
|
| 238 |
axel->url->next = axel->url;
|
| 239 |
strncpy( axel->url->text, (char *) url, MAX_STRING );
|
| 240 |
}
|
| 241 |
else
|
| 242 |
{
|
| 243 |
res = (search_t *) url;
|
| 244 |
u = axel->url = malloc( sizeof( url_t ) );
|
| 245 |
for( i = 0; i < count; i ++ )
|
| 246 |
{
|
| 247 |
strncpy( u->text, res[i].url, MAX_STRING );
|
| 248 |
if( i < count - 1 )
|
| 249 |
{
|
| 250 |
u->next = malloc( sizeof( url_t ) );
|
| 251 |
u = u->next;
|
| 252 |
}
|
| 253 |
else
|
| 254 |
{
|
| 255 |
u->next = axel->url;
|
| 256 |
}
|
| 257 |
}
|
| 258 |
}
|
| 259 |
|
| 260 |
axel->conn[0].conf = axel->conf;
|
| 261 |
if( !conn_set( &axel->conn[0], axel->url->text ) )
|
| 262 |
{
|
| 263 |
axel_message( axel, _("Could not parse URL.\n") );
|
| 264 |
axel->ready = -1;
|
| 265 |
return( axel );
|
| 266 |
}
|
| 267 |
|
| 268 |
axel->conn[0].local_if = axel->conf->interfaces->text;
|
| 269 |
axel->conf->interfaces = axel->conf->interfaces->next;
|
| 270 |
|
| 271 |
strncpy( axel->filename, axel->conn[0].file, MAX_STRING );
|
| 272 |
http_decode( axel->filename );
|
| 273 |
if( *axel->filename == 0 ) /* Index page == no fn */
|
| 274 |
strncpy( axel->filename, axel->conf->default_filename, MAX_STRING );
|
| 275 |
if( ( s = strchr( axel->filename, '?' ) ) != NULL && axel->conf->strip_cgi_parameters )
|
| 276 |
*s = 0; /* Get rid of CGI parameters */
|
| 277 |
|
| 278 |
if( !conn_init( &axel->conn[0] ) )
|
| 279 |
{
|
| 280 |
axel_message( axel, axel->conn[0].message );
|
| 281 |
axel->ready = -1;
|
| 282 |
return( axel );
|
| 283 |
}
|
| 284 |
|
| 285 |
/* This does more than just checking the file size, it all depends
|
| 286 |
on the protocol used. */
|
| 287 |
if( !conn_info( &axel->conn[0] ) )
|
| 288 |
{
|
| 289 |
axel_message( axel, axel->conn[0].message );
|
| 290 |
axel->ready = -1;
|
| 291 |
return( axel );
|
| 292 |
}
|
| 293 |
s = conn_url( axel->conn );
|
| 294 |
strncpy( axel->url->text, s, MAX_STRING );
|
| 295 |
if( ( axel->size = axel->conn[0].size ) != INT_MAX )
|
| 296 |
{
|
| 297 |
if( axel->conf->verbose > 0 )
|
| 298 |
axel_message( axel, _("File size: %lld bytes"), axel->size );
|
| 299 |
}
|
| 300 |
|
| 301 |
/* Wildcards in URL --> Get complete filename */
|
| 302 |
if( strchr( axel->filename, '*' ) || strchr( axel->filename, '?' ) )
|
| 303 |
strncpy( axel->filename, axel->conn[0].file, MAX_STRING );
|
| 304 |
|
| 305 |
return( axel );
|
| 306 |
}
|
| 307 |
|
| 308 |
/* Open a local file to store the downloaded data */
|
| 309 |
int axel_open( axel_t *axel )
|
| 310 |
{
|
| 311 |
int i, fd;
|
| 312 |
long long int j;
|
| 313 |
|
| 314 |
if( axel->conf->verbose > 0 )
|
| 315 |
axel_message( axel, _("Opening output file %s"), axel->filename );
|
| 316 |
snprintf( buffer, MAX_STRING, "%s.st", axel->filename );
|
| 317 |
|
| 318 |
axel->outfd = -1;
|
| 319 |
|
| 320 |
/* Check whether server knows about RESTart and switch back to
|
| 321 |
single connection download if necessary */
|
| 322 |
if( !axel->conn[0].supported )
|
| 323 |
{
|
| 324 |
axel_message( axel, _("Server unsupported, "
|
| 325 |
"starting from scratch with one connection.") );
|
| 326 |
axel->conf->num_connections = 1;
|
| 327 |
axel->conn = realloc( axel->conn, sizeof( conn_t ) );
|
| 328 |
axel_divide( axel );
|
| 329 |
}
|
| 330 |
else if( ( fd = open( buffer, O_RDONLY ) ) != -1 )
|
| 331 |
{
|
| 332 |
read( fd, &axel->conf->num_connections, sizeof( axel->conf->num_connections ) );
|
| 333 |
|
| 334 |
axel->conn = realloc( axel->conn, sizeof( conn_t ) * axel->conf->num_connections );
|
| 335 |
memset( axel->conn + 1, 0, sizeof( conn_t ) * ( axel->conf->num_connections - 1 ) );
|
| 336 |
|
| 337 |
axel_divide( axel );
|
| 338 |
|
| 339 |
read( fd, &axel->bytes_done, sizeof( axel->bytes_done ) );
|
| 340 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 341 |
read( fd, &axel->conn[i].currentbyte, sizeof( axel->conn[i].currentbyte ) );
|
| 342 |
|
| 343 |
axel_message( axel, _("State file found: %lld bytes downloaded, %lld to go."),
|
| 344 |
axel->bytes_done, axel->size - axel->bytes_done );
|
| 345 |
|
| 346 |
close( fd );
|
| 347 |
|
| 348 |
if( ( axel->outfd = open( axel->filename, O_WRONLY, 0666 ) ) == -1 )
|
| 349 |
{
|
| 350 |
axel_message( axel, _("Error opening local file") );
|
| 351 |
return( 0 );
|
| 352 |
}
|
| 353 |
}
|
| 354 |
|
| 355 |
/* If outfd == -1 we have to start from scrath now */
|
| 356 |
if( axel->outfd == -1 )
|
| 357 |
{
|
| 358 |
axel_divide( axel );
|
| 359 |
|
| 360 |
if( ( axel->outfd = open( axel->filename, O_CREAT | O_WRONLY, 0666 ) ) == -1 )
|
| 361 |
{
|
| 362 |
axel_message( axel, _("Error opening local file") );
|
| 363 |
return( 0 );
|
| 364 |
}
|
| 365 |
|
| 366 |
/* And check whether the filesystem can handle seeks to
|
| 367 |
past-EOF areas.. Speeds things up. :) AFAIK this
|
| 368 |
should just not happen: */
|
| 369 |
if( lseek( axel->outfd, axel->size, SEEK_SET ) == -1 && axel->conf->num_connections > 1 )
|
| 370 |
{
|
| 371 |
/* But if the OS/fs does not allow to seek behind
|
| 372 |
EOF, we have to fill the file with zeroes before
|
| 373 |
starting. Slow.. */
|
| 374 |
axel_message( axel, _("Crappy filesystem/OS.. Working around. :-(") );
|
| 375 |
lseek( axel->outfd, 0, SEEK_SET );
|
| 376 |
memset( buffer, 0, axel->conf->buffer_size );
|
| 377 |
j = axel->size;
|
| 378 |
while( j > 0 )
|
| 379 |
{
|
| 380 |
write( axel->outfd, buffer, min( j, axel->conf->buffer_size ) );
|
| 381 |
j -= axel->conf->buffer_size;
|
| 382 |
}
|
| 383 |
}
|
| 384 |
}
|
| 385 |
|
| 386 |
return( 1 );
|
| 387 |
}
|
| 388 |
|
| 389 |
/* Start downloading */
|
| 390 |
void axel_start( axel_t *axel ) {
|
| 391 |
int i;
|
| 392 |
|
| 393 |
/* HTTP might've redirected and FTP handles wildcards, so
|
| 394 |
re-scan the URL for every conn */
|
| 395 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 396 |
{
|
| 397 |
conn_set( &axel->conn[i], axel->url->text );
|
| 398 |
axel->url = axel->url->next;
|
| 399 |
axel->conn[i].local_if = axel->conf->interfaces->text;
|
| 400 |
axel->conf->interfaces = axel->conf->interfaces->next;
|
| 401 |
axel->conn[i].conf = axel->conf;
|
| 402 |
if( i ) axel->conn[i].supported = 1;
|
| 403 |
}
|
| 404 |
|
| 405 |
if( axel->conf->verbose > 0 )
|
| 406 |
axel_message( axel, _("Starting download") );
|
| 407 |
|
| 408 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 409 |
if( axel->conn[i].currentbyte <= axel->conn[i].lastbyte )
|
| 410 |
{
|
| 411 |
if( axel->conf->verbose >= 2 )
|
| 412 |
axel_message( axel, _("Connection %i downloading from %s:%i using interface %s"),
|
| 413 |
i, axel->conn[i].host, axel->conn[i].port, axel->conn[i].local_if );
|
| 414 |
if( pthread_create( axel->conn[i].setup_thread, NULL, setup_thread, &axel->conn[i] ) != 0 )
|
| 415 |
{
|
| 416 |
axel_message( axel, _("pthread error!!!") );
|
| 417 |
axel->ready = -1;
|
| 418 |
}
|
| 419 |
else
|
| 420 |
{
|
| 421 |
axel->conn[i].last_transfer = gettime();
|
| 422 |
axel->conn[i].state = 1;
|
| 423 |
}
|
| 424 |
}
|
| 425 |
}
|
| 426 |
|
| 427 |
/* Main 'loop' */
|
| 428 |
void axel_do( axel_t *axel )
|
| 429 |
{
|
| 430 |
fd_set fds[1];
|
| 431 |
int hifd, i, j;
|
| 432 |
long long int size;
|
| 433 |
struct timeval timeval[1];
|
| 434 |
|
| 435 |
/* Create statefile if necessary */
|
| 436 |
if( gettime() > axel->next_state )
|
| 437 |
{
|
| 438 |
save_state( axel );
|
| 439 |
axel->next_state = gettime() + axel->conf->save_state_interval;
|
| 440 |
}
|
| 441 |
|
| 442 |
/* Wait for data on (one of) the connections */
|
| 443 |
FD_ZERO( fds );
|
| 444 |
hifd = 0;
|
| 445 |
for( i = 0; i < axel->conncount; i ++ )
|
| 446 |
{
|
| 447 |
if( axel->conn[i].enabled )
|
| 448 |
FD_SET( axel->conn[i].fd, fds );
|
| 449 |
hifd = max( hifd, axel->conn[i].fd );
|
| 450 |
}
|
| 451 |
if( hifd == 0 )
|
| 452 |
{
|
| 453 |
/* No connections yet. Wait... */
|
| 454 |
usleep( 100000 );
|
| 455 |
goto conn_check;
|
| 456 |
}
|
| 457 |
else
|
| 458 |
{
|
| 459 |
timeval->tv_sec = 0;
|
| 460 |
timeval->tv_usec = 100000;
|
| 461 |
/* A select() error probably means it was interrupted
|
| 462 |
by a signal, or that something else's very wrong... */
|
| 463 |
if( select( hifd + 1, fds, NULL, NULL, timeval ) == -1 )
|
| 464 |
{
|
| 465 |
axel->ready = -1;
|
| 466 |
return;
|
| 467 |
}
|
| 468 |
}
|
| 469 |
|
| 470 |
/* Handle connections which need attention */
|
| 471 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 472 |
if( axel->conn[i].enabled ) {
|
| 473 |
if( FD_ISSET( axel->conn[i].fd, fds ) )
|
| 474 |
{
|
| 475 |
axel->conn[i].last_transfer = gettime();
|
| 476 |
size = read( axel->conn[i].fd, buffer, axel->conf->buffer_size );
|
| 477 |
if( size == -1 )
|
| 478 |
{
|
| 479 |
if( axel->conf->verbose )
|
| 480 |
{
|
| 481 |
axel_message( axel, _("Error on connection %i! "
|
| 482 |
"Connection closed"), i );
|
| 483 |
}
|
| 484 |
axel->conn[i].enabled = 0;
|
| 485 |
conn_disconnect( &axel->conn[i] );
|
| 486 |
continue;
|
| 487 |
}
|
| 488 |
else if( size == 0 )
|
| 489 |
{
|
| 490 |
if( axel->conf->verbose )
|
| 491 |
{
|
| 492 |
/* Only abnormal behaviour if: */
|
| 493 |
if( axel->conn[i].currentbyte < axel->conn[i].lastbyte && axel->size != INT_MAX )
|
| 494 |
{
|
| 495 |
axel_message( axel, _("Connection %i unexpectedly closed"), i );
|
| 496 |
}
|
| 497 |
else
|
| 498 |
{
|
| 499 |
axel_message( axel, _("Connection %i finished"), i );
|
| 500 |
}
|
| 501 |
}
|
| 502 |
if( !axel->conn[0].supported )
|
| 503 |
{
|
| 504 |
axel->ready = 1;
|
| 505 |
}
|
| 506 |
axel->conn[i].enabled = 0;
|
| 507 |
conn_disconnect( &axel->conn[i] );
|
| 508 |
continue;
|
| 509 |
}
|
| 510 |
/* j == Bytes to go */
|
| 511 |
j = axel->conn[i].lastbyte - axel->conn[i].currentbyte + 1;
|
| 512 |
if( j < size )
|
| 513 |
{
|
| 514 |
if( axel->conf->verbose )
|
| 515 |
{
|
| 516 |
axel_message( axel, _("Connection %i finished"), i );
|
| 517 |
}
|
| 518 |
axel->conn[i].enabled = 0;
|
| 519 |
conn_disconnect( &axel->conn[i] );
|
| 520 |
size = j;
|
| 521 |
/* Don't terminate, still stuff to write! */
|
| 522 |
}
|
| 523 |
/* This should always succeed.. */
|
| 524 |
lseek( axel->outfd, axel->conn[i].currentbyte, SEEK_SET );
|
| 525 |
if( write( axel->outfd, buffer, size ) != size )
|
| 526 |
{
|
| 527 |
|
| 528 |
axel_message( axel, _("Write error!") );
|
| 529 |
axel->ready = -1;
|
| 530 |
return;
|
| 531 |
}
|
| 532 |
axel->conn[i].currentbyte += size;
|
| 533 |
axel->bytes_done += size;
|
| 534 |
}
|
| 535 |
else
|
| 536 |
{
|
| 537 |
if( gettime() > axel->conn[i].last_transfer + axel->conf->connection_timeout )
|
| 538 |
{
|
| 539 |
if( axel->conf->verbose )
|
| 540 |
axel_message( axel, _("Connection %i timed out"), i );
|
| 541 |
conn_disconnect( &axel->conn[i] );
|
| 542 |
axel->conn[i].enabled = 0;
|
| 543 |
}
|
| 544 |
} }
|
| 545 |
|
| 546 |
if( axel->ready )
|
| 547 |
return;
|
| 548 |
|
| 549 |
conn_check:
|
| 550 |
/* Look for aborted connections and attempt to restart them. */
|
| 551 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 552 |
{
|
| 553 |
if( !axel->conn[i].enabled && axel->conn[i].currentbyte < axel->conn[i].lastbyte )
|
| 554 |
{
|
| 555 |
if( axel->conn[i].state == 0 )
|
| 556 |
{
|
| 557 |
conn_set( &axel->conn[i], axel->url->text );
|
| 558 |
axel->url = axel->url->next;
|
| 559 |
/* axel->conn[i].local_if = axel->conf->interfaces->text;
|
| 560 |
axel->conf->interfaces = axel->conf->interfaces->next; */
|
| 561 |
if( axel->conf->verbose >= 2 )
|
| 562 |
axel_message( axel, _("Connection %i downloading from %s:%i using interface %s"),
|
| 563 |
i, axel->conn[i].host, axel->conn[i].port, axel->conn[i].local_if );
|
| 564 |
if( pthread_create( axel->conn[i].setup_thread, NULL, setup_thread, &axel->conn[i] ) == 0 )
|
| 565 |
{
|
| 566 |
axel->conn[i].state = 1;
|
| 567 |
axel->conn[i].last_transfer = gettime();
|
| 568 |
}
|
| 569 |
else
|
| 570 |
{
|
| 571 |
axel_message( axel, _("pthread error!!!") );
|
| 572 |
axel->ready = -1;
|
| 573 |
}
|
| 574 |
}
|
| 575 |
else
|
| 576 |
{
|
| 577 |
if( gettime() > axel->conn[i].last_transfer + axel->conf->reconnect_delay )
|
| 578 |
{
|
| 579 |
pthread_cancel( *axel->conn[i].setup_thread );
|
| 580 |
axel->conn[i].state = 0;
|
| 581 |
}
|
| 582 |
}
|
| 583 |
}
|
| 584 |
}
|
| 585 |
|
| 586 |
/* Calculate current average speed and finish_time */
|
| 587 |
axel->bytes_per_second = (int) ( (double) ( axel->bytes_done - axel->start_byte ) / ( gettime() - axel->start_time ) );
|
| 588 |
axel->finish_time = (int) ( axel->start_time + (double) ( axel->size - axel->start_byte ) / axel->bytes_per_second );
|
| 589 |
|
| 590 |
/* Check speed. If too high, delay for some time to slow things
|
| 591 |
down a bit. I think a 5% deviation should be acceptable. */
|
| 592 |
if( axel->conf->max_speed > 0 )
|
| 593 |
{
|
| 594 |
if( (float) axel->bytes_per_second / axel->conf->max_speed > 1.05 )
|
| 595 |
axel->delay_time += 10000;
|
| 596 |
else if( ( (float) axel->bytes_per_second / axel->conf->max_speed < 0.95 ) && ( axel->delay_time >= 10000 ) )
|
| 597 |
axel->delay_time -= 10000;
|
| 598 |
else if( ( (float) axel->bytes_per_second / axel->conf->max_speed < 0.95 ) )
|
| 599 |
axel->delay_time = 0;
|
| 600 |
usleep( axel->delay_time );
|
| 601 |
}
|
| 602 |
|
| 603 |
/* Ready? */
|
| 604 |
if( axel->bytes_done == axel->size )
|
| 605 |
axel->ready = 1;
|
| 606 |
}
|
| 607 |
|
| 608 |
/* Close an axel connection */
|
| 609 |
void axel_close( axel_t *axel )
|
| 610 |
{
|
| 611 |
int i;
|
| 612 |
message_t *m;
|
| 613 |
|
| 614 |
/* Terminate any thread still running */
|
| 615 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 616 |
/* don't try to kill non existing thread */
|
| 617 |
if ( *axel->conn[i].setup_thread != 0 )
|
| 618 |
pthread_cancel( *axel->conn[i].setup_thread );
|
| 619 |
|
| 620 |
/* Delete state file if necessary */
|
| 621 |
if( axel->ready == 1 )
|
| 622 |
{
|
| 623 |
snprintf( buffer, MAX_STRING, "%s.st", axel->filename );
|
| 624 |
unlink( buffer );
|
| 625 |
}
|
| 626 |
/* Else: Create it.. */
|
| 627 |
else if( axel->bytes_done > 0 )
|
| 628 |
{
|
| 629 |
save_state( axel );
|
| 630 |
}
|
| 631 |
|
| 632 |
/* Delete any message not processed yet */
|
| 633 |
while( axel->message )
|
| 634 |
{
|
| 635 |
m = axel->message;
|
| 636 |
axel->message = axel->message->next;
|
| 637 |
free( m );
|
| 638 |
}
|
| 639 |
|
| 640 |
/* Close all connections and local file */
|
| 641 |
close( axel->outfd );
|
| 642 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 643 |
conn_disconnect( &axel->conn[i] );
|
| 644 |
|
| 645 |
free( axel->conn );
|
| 646 |
free( axel );
|
| 647 |
}
|
| 648 |
|
| 649 |
/* Save the state of the current download */
|
| 650 |
void save_state( axel_t *axel )
|
| 651 |
{
|
| 652 |
int fd, i;
|
| 653 |
char fn[MAX_STRING+4];
|
| 654 |
|
| 655 |
snprintf( fn, MAX_STRING, "%s" STATEFILE_SUFFIX, axel->filename );
|
| 656 |
if( ( fd = open( fn, O_CREAT | O_TRUNC | O_WRONLY, 0600 ) ) == -1 )
|
| 657 |
{
|
| 658 |
return; /* Not 100% fatal.. */
|
| 659 |
}
|
| 660 |
write( fd, &axel->conf->num_connections, sizeof( axel->conf->num_connections ) );
|
| 661 |
write( fd, &axel->bytes_done, sizeof( axel->bytes_done ) );
|
| 662 |
for( i = 0; i < axel->conf->num_connections; i ++ )
|
| 663 |
{
|
| 664 |
write( fd, &axel->conn[i].currentbyte, sizeof( axel->conn[i].currentbyte ) );
|
| 665 |
}
|
| 666 |
close( fd );
|
| 667 |
}
|
| 668 |
|
| 669 |
/* Divide the file and set the locations for each connection */
|
| 670 |
static void axel_divide( axel_t *axel )
|
| 671 |
{
|
| 672 |
int i;
|
| 673 |
|
| 674 |
axel->conn[0].currentbyte = 0;
|
| 675 |
axel->conn[0].lastbyte = axel->size / axel->conf->num_connections - 1;
|
| 676 |
for( i = 1; i < axel->conf->num_connections; i ++ )
|
| 677 |
{
|
| 678 |
#ifdef DEBUG
|
| 679 |
printf( "Downloading %lld-%lld using conn. %i\n", axel->conn[i-1].currentbyte, axel->conn[i-1].lastbyte, i - 1 );
|
| 680 |
#endif
|
| 681 |
axel->conn[i].currentbyte = axel->conn[i-1].lastbyte + 1;
|
| 682 |
axel->conn[i].lastbyte = axel->conn[i].currentbyte + axel->size / axel->conf->num_connections;
|
| 683 |
}
|
| 684 |
axel->conn[axel->conf->num_connections-1].lastbyte = axel->size - 1;
|
| 685 |
#ifdef DEBUG
|
| 686 |
printf( "Downloading %lld-%lld using conn. %i\n", axel->conn[i-1].currentbyte, axel->conn[i-1].lastbyte, i - 1 );
|
| 687 |
#endif
|
| 688 |
}
|
Parent Directory
| 
Revision Log