err.no Git - mapper/blob - src/map-download.c

   1 /*
   2  * This file is part of mapper
   3  *
   4  * Copyright (C) 2007 Kaj-Michael Lang
   5  * Copyright (C) 2006-2007 John Costigan.
   6  *
   7  * POI and GPS-Info code originally written by Cezary Jackiewicz.
   8  *
   9  * Default map data provided by http://www.openstreetmap.org/
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <unistd.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <strings.h>
  32 #include <stddef.h>
  33 #include <locale.h>
  34 #include <math.h>
  35 #include <errno.h>
  36 #include <sys/wait.h>
  37 #include <glib/gstdio.h>
  38 #include <fcntl.h>
  39 #include <curl/multi.h>
  40 #include <libintl.h>
  41 #include <locale.h>
  42
  43 #include "hildon-mapper.h"
  44
  45 #include "utils.h"
  46 #include "map.h"
  47 #include "osm.h"
  48 #include "db.h"
  49 #include "osm-db.h"
  50 #include "poi.h"
  51 #include "route.h"
  52 #include "gps.h"
  53 #include "mapper-types.h"
  54 #include "ui-common.h"
  55 #include "settings.h"
  56 #include "latlon.h"
  57 #include "gpx.h"
  58 #include "map-download.h"
  59 #include "iap.h"
  60
  61 static guint _num_downloads=0;
  62 static guint _curr_download=0;
  63
  64 static gchar *map_construct_url(guint tilex, guint tiley, guint zoom);
  65
  66 static gboolean
  67 get_next_pui(gpointer key, gpointer value, ProgressUpdateInfo ** data)
  68 {
  69 *data = key;
  70 return TRUE;
  71 }
  72
  73 static gint
  74 download_comparefunc(const ProgressUpdateInfo * a, const ProgressUpdateInfo * b, gpointer user_data)
  75 {
  76 gint diff = (a->priority - b->priority);
  77 if (diff)
  78         return diff;
  79 diff = (a->tilex - b->tilex);
  80 if (diff)
  81         return diff;
  82 diff = (a->tiley - b->tiley);
  83 if (diff)
  84         return diff;
  85 diff = (a->zoom - b->zoom);
  86 if (diff)
  87         return diff;
  88 diff = (a->repo - b->repo);
  89 if (diff)
  90         return diff;
  91 /* Otherwise, deletes are "greatest" (least priority). */
  92 if (!a->retries)
  93         return (b->retries ? -1 : 0);
  94 else if (!b->retries)
  95         return (a->retries ? 1 : 0);
  96 /* Do updates after non-updates (because they'll both be done anyway). */
  97 return (a->retries - b->retries);
  98 }
  99
 100 /**
 101  * Free a ProgressUpdateInfo data structure that was allocated during the
 102  * auto-map-download process.
 103  */
 104 static void
 105 progress_update_info_free(ProgressUpdateInfo * pui)
 106 {
 107 g_free(pui->src_str);
 108 g_free(pui->dest_str);
 109 g_slice_free(ProgressUpdateInfo, pui);
 110 }
 111
 112 gboolean
 113 map_download_timeout()
 114 {
 115 static guint destroy_counter = 50;
 116 gint num_transfers = 0, num_msgs = 0;
 117 gint deletes_left = 50; /* only do 50 deletes at a time. */
 118 CURLMsg *msg;
 119
 120 if (_curl_multi && CURLM_CALL_MULTI_PERFORM == curl_multi_perform(_curl_multi, &num_transfers))
 121         return TRUE;    /* Give UI a chance first. */
 122
 123 while (_curl_multi && (msg = curl_multi_info_read(_curl_multi, &num_msgs))) {
 124         if (msg->msg == CURLMSG_DONE) {
 125                 if (msg->easy_handle == _autoroute_data.curl_easy) {
 126                         /* This is the autoroute download. */
 127                         /* Now, parse the autoroute and update the display. */
 128                         if (_autoroute_data.enabled && parse_gpx(&_route,
 129                                          _autoroute_data.rdl_data.bytes,
 130                                          _autoroute_data.rdl_data.bytes_read, 0)) {
 131                                 /* Find the nearest route point, if we're connected. */
 132                                 route_find_nearest_point();
 133                                 map_force_redraw();
 134                         }
 135                         cancel_autoroute(TRUE); /* We're done. Clean up. */
 136                 } else {
 137                         ProgressUpdateInfo *pui = g_hash_table_lookup(_pui_by_easy, msg->easy_handle);
 138                         g_queue_push_head(_curl_easy_queue, msg->easy_handle);
 139                         g_hash_table_remove(_pui_by_easy, msg->easy_handle);
 140                         fclose(pui->file);
 141                         if (msg->data.result != CURLE_OK)
 142                                 g_unlink(pui->dest_str);        /* Delete so we try again. */
 143                         curl_multi_remove_handle(_curl_multi, msg->easy_handle);
 144                         g_idle_add_full(G_PRIORITY_HIGH_IDLE, (GSourceFunc)map_download_idle_refresh, pui, NULL);
 145                 }
 146         }
 147 }
 148
 149 /* Up to 1 transfer per tile. */
 150 while (num_transfers < (BUF_WIDTH_TILES * BUF_HEIGHT_TILES) && g_tree_nnodes(_pui_tree)) {
 151         ProgressUpdateInfo *pui;
 152         g_tree_foreach(_pui_tree, (GTraverseFunc) get_next_pui, &pui);
 153
 154         if (pui->retries) {
 155                 /* This is a download. */
 156                 FILE *f;
 157                 g_tree_steal(_pui_tree, pui);
 158                 g_tree_insert(_downloading_tree, pui, pui);
 159
 160                 pui->src_str = map_construct_url(pui->tilex, pui->tiley, pui->zoom);
 161                 pui->dest_str = g_strdup_printf("%s/%u/%u/%u.jpg",
 162                                     pui->repo->cache_dir, pui->zoom,
 163                                     pui->tilex, pui->tiley);
 164
 165                 if (!pui->src_str) {
 166                         /* Failed to generate URL. */
 167                         g_idle_add_full(G_PRIORITY_HIGH_IDLE,(GSourceFunc)map_download_idle_refresh, pui, NULL);
 168                         continue;
 169                 }
 170
 171                 /* Check to see if we need to overwrite. */
 172                 if (pui->retries > 0) {
 173                         /* We're not updating - check if file already exists. */
 174                         if (g_file_test(pui->dest_str, G_FILE_TEST_EXISTS)) {
 175                                 g_idle_add_full(G_PRIORITY_HIGH_IDLE, (GSourceFunc)map_download_idle_refresh, pui, NULL);
 176                                 continue;
 177                         }
 178                 }
 179
 180                 /* Attempt to open the file for writing. */
 181                 if (!(f = g_fopen(pui->dest_str, "w")) && errno == ENOENT) {
 182                         /* Directory doesn't exist yet - create it, then we'll retry */
 183                         gchar buffer[BUFFER_SIZE];
 184                         g_snprintf(buffer, sizeof(buffer), "%s/%u/%u",
 185                                  pui->repo->cache_dir, pui->zoom, pui->tilex);
 186                         g_mkdir_with_parents(buffer, 0775);
 187                         f = g_fopen(pui->dest_str, "w");
 188                 }
 189
 190                 if (f) {
 191                         CURL *curl_easy;
 192                         pui->file = f;
 193                         curl_easy = g_queue_pop_tail(_curl_easy_queue);
 194                         if (!curl_easy) {
 195                                 /* Need a new curl_easy. */
 196                                 MACRO_CURL_EASY_INIT(curl_easy);
 197                         }
 198                         curl_easy_setopt(curl_easy, CURLOPT_URL, pui->src_str);
 199                         curl_easy_setopt(curl_easy, CURLOPT_WRITEDATA, f);
 200                         g_hash_table_insert(_pui_by_easy, curl_easy, pui);
 201                         if (!_curl_multi) {
 202                                 /* Initialize CURL. */
 203                                 _curl_multi = curl_multi_init();
 204                                 /*curl_multi_setopt(_curl_multi, CURLMOPT_PIPELINING, 1); */
 205                         }
 206                         curl_multi_add_handle(_curl_multi, curl_easy);
 207                         num_transfers++;
 208                 } else {
 209                         /* Unable to open tile file for writing. */
 210                         gchar buffer[BUFFER_SIZE];
 211                         g_snprintf(buffer, sizeof(buffer), "%s:\n%s",
 212                                  _("Failed to open file for writing"),
 213                                  pui->dest_str);
 214                         MACRO_BANNER_SHOW_INFO(_window, buffer);
 215                         g_idle_add_full(G_PRIORITY_HIGH_IDLE, (GSourceFunc)map_download_idle_refresh, pui, NULL);
 216                         continue;
 217                 }
 218         } else if (--deletes_left) {
 219                 /* This is a delete. */
 220                 gchar buffer[BUFFER_SIZE];
 221                 g_tree_steal(_pui_tree, pui);
 222                 g_tree_insert(_downloading_tree, pui, pui);
 223
 224                 g_snprintf(buffer, sizeof(buffer), "%s/%u/%u/%u.jpg",
 225                         pui->repo->cache_dir, pui->zoom,
 226                         pui->tilex,     pui->tiley);
 227                 g_unlink(buffer);
 228                 g_idle_add_full(G_PRIORITY_HIGH_IDLE,(GSourceFunc)map_download_idle_refresh, pui, NULL);
 229         } else
 230                 break;
 231 }
 232
 233 if (!(num_transfers || g_tree_nnodes(_pui_tree))) {
 234         /* Destroy curl after 50 counts (5 seconds). */
 235         if (--destroy_counter) {
 236                 /* Clean up curl. */
 237                 CURL *curr;
 238                 while ((curr = g_queue_pop_tail(_curl_easy_queue)))
 239                         curl_easy_cleanup(curr);
 240
 241                 curl_multi_cleanup(_curl_multi);
 242                 _curl_multi = NULL;
 243
 244                 _curl_sid = 0;
 245                 return FALSE;
 246         }
 247 } else
 248         destroy_counter = 50;
 249
 250 return TRUE;
 251 }
 252
 253 /**
 254  * Given a wms uri pattern, compute the coordinate transformation and
 255  * trimming.
 256  * 'proj' is used for the conversion
 257  */
 258 static gchar *
 259 map_convert_wms_to_wms(gint tilex, gint tiley, gint zoomlevel, gchar * uri)
 260 {
 261 gint system_retcode;
 262 gchar cmd[BUFFER_SIZE], srs[BUFFER_SIZE];
 263 gchar *ret = NULL;
 264 FILE *in;
 265 gdouble lon1, lat1, lon2, lat2;
 266
 267 gchar *widthstr = strcasestr(uri, "WIDTH=");
 268 gchar *heightstr = strcasestr(uri, "HEIGHT=");
 269 gchar *srsstr = strcasestr(uri, "SRS=EPSG");
 270 gchar *srsstre = strchr(srsstr, '&');
 271
 272 /* missing: test if found */
 273 strcpy(srs, "epsg");
 274 strncpy(srs + 4, srsstr + 8, 256);
 275 /* missing: test srsstre-srsstr < 526 */
 276 srs[srsstre - srsstr - 4] = 0;
 277 /* convert to lower, as WMC is EPSG and cs2cs is epsg */
 278
 279 gint dwidth = widthstr ? atoi(widthstr + 6) - TILE_SIZE_PIXELS : 0;
 280 gint dheight = heightstr ? atoi(heightstr + 7) - TILE_SIZE_PIXELS : 0;
 281
 282 unit2latlon(tile2zunit(tilex, zoomlevel) - pixel2zunit(dwidth / 2, zoomlevel),
 283             tile2zunit(tiley + 1, zoomlevel) + pixel2zunit((dheight + 1) / 2, zoomlevel), lat1, lon1);
 284
 285 unit2latlon(tile2zunit(tilex + 1, zoomlevel) + pixel2zunit((dwidth + 1) / 2, zoomlevel),
 286                 tile2zunit(tiley, zoomlevel) - pixel2zunit(dheight / 2, zoomlevel), lat2, lon2);
 287
 288 setlocale(LC_NUMERIC, "C");
 289
 290 g_snprintf(cmd, sizeof(cmd),
 291          "(echo \"%.6f %.6f\"; echo \"%.6f %.6f\") | "
 292          "/usr/bin/cs2cs +proj=longlat +datum=WGS84 +to +init=%s -f %%.6f "
 293          " > /tmp/tmpcs2cs ", lon1, lat1, lon2, lat2, srs);
 294 vprintf("Running command: %s\n", cmd);
 295 system_retcode = system(cmd);
 296
 297 if (system_retcode)
 298         g_printerr("cs2cs returned error code %d\n", WEXITSTATUS(system_retcode));
 299 else if (!(in = g_fopen("/tmp/tmpcs2cs", "r")))
 300         g_printerr("Cannot open results of conversion\n");
 301 else if (5 != fscanf(in, "%lf %lf %s %lf %lf", &lon1, &lat1, cmd, &lon2, &lat2)) {
 302         g_printerr("Wrong conversion\n");
 303         fclose(in);
 304 } else {
 305         fclose(in);
 306         ret = g_strdup_printf(uri, lon1, lat1, lon2, lat2);
 307 }
 308
 309 setlocale(LC_NUMERIC, "");
 310
 311 return ret;
 312 }
 313
 314
 315 /**
 316  * Given the xyz coordinates of our map coordinate system, write the qrst
 317  * quadtree coordinates to buffer.
 318  */
 319 static void
 320 map_convert_coords_to_quadtree_string(gint x, gint y, gint zoomlevel,
 321                                       gchar * buffer, const gchar initial,
 322                                       const gchar * const quadrant)
 323 {
 324 gchar *ptr = buffer;
 325 gint n;
 326
 327 if (initial)
 328         *ptr++ = initial;
 329
 330 for (n = 16 - zoomlevel; n >= 0; n--) {
 331         gint xbit = (x >> n) & 1;
 332         gint ybit = (y >> n) & 1;
 333         *ptr++ = quadrant[xbit + 2 * ybit];
 334 }
 335 *ptr++ = '\0';
 336 }
 337
 338 /**
 339  * Construct the URL that we should fetch, based on the current URI format.
 340  * This method works differently depending on if a "%s" string is present in
 341  * the URI format, since that would indicate a quadtree-based map coordinate
 342  * system.
 343  */
 344 static gchar *
 345 map_construct_url(guint tilex, guint tiley, guint zoom)
 346 {
 347 switch (_curr_repo->type) {
 348 case REPOTYPE_XYZ:
 349         return g_strdup_printf(_curr_repo->url, tilex, tiley, zoom);
 350
 351 case REPOTYPE_XYZ_INV:
 352         return g_strdup_printf(_curr_repo->url, 17 - zoom, tilex, tiley);
 353
 354 case REPOTYPE_QUAD_QRST:
 355         {
 356                 gchar location[MAX_ZOOM + 2];
 357                 map_convert_coords_to_quadtree_string(tilex, tiley, zoom, location, 't', "qrts");
 358                 return g_strdup_printf(_curr_repo->url, location);
 359         }
 360
 361 case REPOTYPE_QUAD_ZERO:
 362         {
 363                 /* This is a zero-based quadtree URI. */
 364                 gchar location[MAX_ZOOM + 2];
 365                 map_convert_coords_to_quadtree_string(tilex, tiley, zoom, location, '\0', "0123");
 366                 return g_strdup_printf(_curr_repo->url, location);
 367         }
 368
 369 case REPOTYPE_WMS:
 370         return map_convert_wms_to_wms(tilex, tiley, zoom, _curr_repo->url);
 371
 372 default:
 373         return NULL;
 374 }
 375 return "";
 376 }
 377
 378
 379 gboolean
 380 map_download_idle_refresh(ProgressUpdateInfo * pui)
 381 {
 382 /* Test if download succeeded (only if retries != 0). */
 383 if (!pui->retries || g_file_test(pui->dest_str, G_FILE_TEST_EXISTS)) {
 384         gint zoom_diff = pui->zoom - _zoom;
 385         /* Only refresh at same or "lower" (more detailed) zoom level. */
 386         if (zoom_diff >= 0) {
 387                 /* If zoom has changed since we first put in the request for
 388                  * this tile, then we may have to update more than one tile. */
 389                 guint tilex, tiley, tilex_end, tiley_end;
 390                 for (tilex = pui->tilex << zoom_diff, tilex_end = tilex + (1 << zoom_diff); tilex < tilex_end; tilex++) {
 391                         for (tiley = pui->tiley << zoom_diff, tiley_end = tiley + (1 << zoom_diff); tiley < tiley_end; tiley++) {
 392                                 if ((tilex - _base_tilex) < BUF_WIDTH_TILES && (tiley - _base_tiley) < BUF_HEIGHT_TILES) {
 393                                         map_render_tile(tilex, tiley, ((tilex - _base_tilex) << TILE_SIZE_P2), ((tiley - _base_tiley) << TILE_SIZE_P2), TRUE);
 394                                         map_render_data();
 395                                         gtk_widget_queue_draw_area
 396                                             (_map_widget,
 397                                              ((tilex - _base_tilex) << TILE_SIZE_P2) - _offsetx,
 398                                              ((tiley - _base_tiley) << TILE_SIZE_P2) - _offsety,
 399                                              TILE_SIZE_PIXELS, TILE_SIZE_PIXELS);
 400                                 }
 401                         }
 402                 }
 403         }
 404 }
 405 /* Else the download failed. Update retries and maybe try again. */
 406 else {
 407         if (pui->retries > 0)
 408                 --pui->retries;
 409         else if (pui->retries < 0)
 410                 ++pui->retries;
 411
 412         if (pui->retries) {
 413                 /* removal automatically calls progress_update_info_free(). */
 414                 g_tree_steal(_downloading_tree, pui);
 415                 g_tree_insert(_pui_tree, pui, pui);
 416                 if (iap_is_connected() && !_curl_sid)
 417                         _curl_sid = g_timeout_add(100,(GSourceFunc)map_download_timeout, NULL);
 418                 /* Don't do anything else. */
 419                 return FALSE;
 420         } else {
 421                 /* No more retries left - something must be wrong. */
 422                 MACRO_BANNER_SHOW_INFO(_window, _("Error in download. Check internet connection and/or Map Repository URL Format."));
 423         }
 424 }
 425
 426 /* removal automatically calls progress_update_info_free(). */
 427 g_tree_remove(_downloading_tree, pui);
 428
 429 if (++_curr_download == _num_downloads) {
 430         _num_downloads = _curr_download = 0;
 431         gtk_progress_bar_set_fraction(_progress_item, 0.0);
 432         gtk_progress_bar_set_text(_progress_item, "");
 433 } else {
 434         gchar buffer[64];
 435
 436         g_snprintf(buffer, sizeof(buffer), _("Downloading maps (%d/%d)"), _curr_download, _num_downloads);
 437         gtk_progress_bar_set_text(_progress_item, buffer);
 438         gtk_progress_bar_set_fraction(_progress_item, _curr_download / (double)_num_downloads);
 439 }
 440 return FALSE;
 441 }
 442
 443 /**
 444  * Initiate a download of the given xyz coordinates using the given buffer
 445  * as the URL.  If the map already exists on disk, or if we are already
 446  * downloading the map, then this method does nothing.
 447  */
 448 void
 449 map_initiate_download(guint tilex, guint tiley, guint zoom, gint retries)
 450 {
 451 ProgressUpdateInfo *pui;
 452
 453 iap_connect();
 454
 455 pui = g_slice_new(ProgressUpdateInfo);
 456 pui->tilex = tilex;
 457 pui->tiley = tiley;
 458 pui->zoom = zoom;
 459 pui->priority = (abs((gint) tilex - unit2tile(_center.unitx)) + abs((gint) tiley - unit2tile(_center.unity)));
 460 if (!retries)
 461         pui->priority = -pui->priority; /* "Negative" makes them lowest pri. */
 462 pui->retries = retries;
 463 pui->repo = _curr_repo;
 464
 465 if (g_tree_lookup(_pui_tree, pui) || g_tree_lookup(_downloading_tree, pui)) {
 466         /* Already downloading. */
 467         g_slice_free(ProgressUpdateInfo, pui);
 468         return;
 469 }
 470 pui->src_str = NULL;
 471 pui->dest_str = NULL;
 472 pui->file = NULL;
 473
 474 g_tree_insert(_pui_tree, pui, pui);
 475 if (iap_is_connected() && !_curl_sid)
 476         _curl_sid = g_timeout_add(100, (GSourceFunc) map_download_timeout, NULL);
 477
 478 if (!_num_downloads++)
 479         gtk_progress_bar_set_text(_progress_item, _("Downloading maps..."));
 480 }
 481
 482 void
 483 map_download_init(void)
 484 {
 485 _curl_easy_queue = g_queue_new();
 486 _pui_tree = g_tree_new_full((GCompareDataFunc) download_comparefunc, NULL, (GDestroyNotify) progress_update_info_free, NULL);
 487 _downloading_tree = g_tree_new_full((GCompareDataFunc) download_comparefunc, NULL, (GDestroyNotify) progress_update_info_free, NULL);
 488 _pui_by_easy = g_hash_table_new(g_direct_hash, g_direct_equal);
 489 }
 490
 491 void
 492 map_download_deinit(void)
 493 {
 494 /* Clean up CURL. */
 495 if (_curl_multi) {
 496         CURL *curr;
 497         CURLMsg *msg;
 498         gint num_transfers, num_msgs;
 499
 500         /* First, remove all downloads from _pui_tree. */
 501         g_tree_destroy(_pui_tree);
 502
 503         /* Finish up all downloads. */
 504         while (CURLM_CALL_MULTI_PERFORM == curl_multi_perform(_curl_multi, &num_transfers) || num_transfers) {
 505                 /* XXX: should inform the user why it's taking so damn long... */
 506         }
 507
 508         /* Close all finished files. */
 509         while ((msg = curl_multi_info_read(_curl_multi, &num_msgs))) {
 510                 if (msg->msg == CURLMSG_DONE) {
 511                         /* This is a map download. */
 512                         ProgressUpdateInfo *pui = g_hash_table_lookup(_pui_by_easy, msg->easy_handle);
 513                         g_queue_push_head(_curl_easy_queue, msg->easy_handle);
 514                         g_hash_table_remove(_pui_by_easy, msg->easy_handle);
 515                         fclose(pui->file);
 516                         curl_multi_remove_handle(_curl_multi, msg->easy_handle);
 517                 }
 518         }
 519
 520         while ((curr = g_queue_pop_tail(_curl_easy_queue)))
 521                 curl_easy_cleanup(curr);
 522
 523         curl_multi_cleanup(_curl_multi);
 524         _curl_multi = NULL;
 525
 526         g_queue_free(_curl_easy_queue);
 527         g_tree_destroy(_downloading_tree);
 528         g_hash_table_destroy(_pui_by_easy);
 529 }
 530
 531 if (_curl_sid) {
 532     g_source_remove(_curl_sid);
 533     _curl_sid = 0;
 534 }
 535 }