X-Git-Url: https://git.street.me.uk/andy/viking.git/blobdiff_plain/056e8bd1e118978e180badd09803925319124a05..09dd3c51f9b2f619cbc97883170ab64bbe5642b7:/src/google.c diff --git a/src/google.c b/src/google.c index 01613774..bb5d3701 100644 --- a/src/google.c +++ b/src/google.c @@ -18,7 +18,14 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#include +#include +#include +#include #include #include #include @@ -26,22 +33,31 @@ #include "vikcoord.h" #include "mapcoord.h" #include "download.h" +#include "curl_download.h" #include "globals.h" #include "google.h" #include "vikmapslayer.h" -#define GOOGLE_VERSION "w2.46" -#define GOOGLE_TRANS_VERSION "w2t.47" -#define GOOGLE_KH_VERSION "17" + +static int google_download ( MapCoord *src, const gchar *dest_fn ); +static int google_trans_download ( MapCoord *src, const gchar *dest_fn ); +static int google_terrain_download ( MapCoord *src, const gchar *dest_fn ); +static int google_kh_download ( MapCoord *src, const gchar *dest_fn ); +static void google_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest ); +static gboolean google_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ); + +static DownloadOptions google_options = { "http://maps.google.com/", 0, a_check_map_file }; void google_init () { VikMapsLayer_MapType google_1 = { 7, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, google_coord_to_mapcoord, google_mapcoord_to_center_coord, google_download }; VikMapsLayer_MapType google_2 = { 10, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, google_coord_to_mapcoord, google_mapcoord_to_center_coord, google_trans_download }; VikMapsLayer_MapType google_3 = { 11, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, google_coord_to_mapcoord, google_mapcoord_to_center_coord, google_kh_download }; + VikMapsLayer_MapType google_4 = { 16, 256, 256, VIK_VIEWPORT_DRAWMODE_MERCATOR, google_coord_to_mapcoord, google_mapcoord_to_center_coord, google_terrain_download }; - maps_layer_register_type("Google Maps", 7, &google_1); - maps_layer_register_type("Transparent Google Maps", 10, &google_2); - maps_layer_register_type("Google Satellite Images", 11, &google_3); + maps_layer_register_type(_("Google Maps"), 7, &google_1); + maps_layer_register_type(_("Transparent Google Maps"), 10, &google_2); + maps_layer_register_type(_("Google Satellite Images"), 11, &google_3); + maps_layer_register_type(_("Google Terrain Maps"), 16, &google_4); } /* 1 << (x) is like a 2**(x) */ @@ -62,6 +78,131 @@ guint8 google_zoom ( gdouble mpp ) { return 255; } +typedef enum { + TYPE_GOOGLE_MAPS = 0, + TYPE_GOOGLE_TRANS, + TYPE_GOOGLE_SAT, + TYPE_GOOGLE_TERRAIN, + + TYPE_GOOGLE_NUM +} GoogleType; + +static gchar *parse_version_number(gchar *text) +{ + int i; + gchar *vers; + gchar *s = text; + + for (i = 0; (s[i] != '\\') && (i < 8); i++) + ; + if (s[i] != '\\') { + return NULL; + } + + return vers = g_strndup(s, i); +} + +static const gchar *google_version_number(MapCoord *mapcoord, GoogleType google_type) +{ + static gboolean first = TRUE; + static char *vers[] = { "w2.60", "w2t.60", "20", "w2p.60" }; + FILE *tmp_file; + int tmp_fd; + gchar *tmpname; + gchar *uri; + VikCoord coord; + gchar coord_north_south[G_ASCII_DTOSTR_BUF_SIZE], coord_east_west[G_ASCII_DTOSTR_BUF_SIZE]; + gchar *text, *pat, *beg; + GMappedFile *mf; + gsize len; + gchar *gvers, *tvers, *kvers, *terrvers, *tmpvers; + static DownloadOptions dl_options = { "http://maps.google.com/", 0, a_check_map_file }; + static const char *gvers_pat = "http://mt0.google.com/mt?v\\x3d"; + static const char *kvers_pat = "http://khm0.google.com/kh?v\\x3d"; + + g_assert(google_type < TYPE_GOOGLE_NUM); + + if (!first) + return (vers[google_type]); + + + first = FALSE; + gvers = tvers = kvers = terrvers = NULL; + if ((tmp_fd = g_file_open_tmp ("vikgvers.XXXXXX", &tmpname, NULL)) == -1) { + g_critical(_("couldn't open temp file %s"), tmpname); + exit(1); + } + + google_mapcoord_to_center_coord(mapcoord, &coord); + uri = g_strdup_printf("http://maps.google.com/maps?f=q&hl=en&q=%s,%s", + g_ascii_dtostr (coord_north_south, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) coord.north_south), + g_ascii_dtostr (coord_east_west, G_ASCII_DTOSTR_BUF_SIZE, (gdouble) coord.east_west)); + tmp_file = fdopen(tmp_fd, "r+"); + + if (curl_download_uri(uri, tmp_file, &dl_options)) { /* error */ + g_warning(_("Failed downloading %s"), tmpname); + } else { + if ((mf = g_mapped_file_new(tmpname, FALSE, NULL)) == NULL) { + g_critical(_("couldn't map temp file")); + exit(1); + } + len = g_mapped_file_get_length(mf); + text = g_mapped_file_get_contents(mf); + + if ((beg = g_strstr_len(text, len, "GLoadApi")) == NULL) { + g_warning(_("Failed fetching Google numbers (\"GLoadApi\" not found)")); + goto failed; + } + + pat = beg; + while (!gvers || !tvers ||!terrvers) { + if ((pat = g_strstr_len(pat, &text[len] - pat, gvers_pat)) != NULL) { + pat += strlen(gvers_pat); + if ((tmpvers = parse_version_number(pat)) != NULL) { + if (strstr(tmpvers, "t.")) + tvers = tmpvers; + else if (strstr(tmpvers, "p.")) + terrvers = tmpvers; + else + gvers = tmpvers; + } + } + else + break; + } + + if ((pat = g_strstr_len(beg, &text[len] - beg, kvers_pat)) != NULL) + kvers = parse_version_number(pat + strlen(kvers_pat)); + + if (gvers && tvers && kvers) { + vers[TYPE_GOOGLE_MAPS] = gvers; + vers[TYPE_GOOGLE_TRANS] = tvers; + vers[TYPE_GOOGLE_SAT] = kvers; + vers[TYPE_GOOGLE_TERRAIN] = terrvers; + } + else + g_warning(_("Failed getting google version numbers")); + + if (gvers) + fprintf(stderr, "DEBUG gvers=%s\n", gvers); + if (tvers) + fprintf(stderr, "DEBUG tvers=%s\n", tvers); + if (terrvers) + fprintf(stderr, "DEBUG terrvers=%s\n", terrvers); + if (kvers) + fprintf(stderr, "DEBUG kvers=%s\n", kvers); + +failed: + g_mapped_file_free(mf); + } + + fclose(tmp_file); + tmp_file = NULL; + g_free(tmpname); + g_free (uri); + return (vers[google_type]); +} + gboolean google_coord_to_mapcoord ( const VikCoord *src, gdouble xzoom, gdouble yzoom, MapCoord *dest ) { g_assert ( src->mode == VIK_COORD_LATLON ); @@ -88,21 +229,31 @@ void google_mapcoord_to_center_coord ( MapCoord *src, VikCoord *dest ) dest->north_south = DEMERCLAT(180 - ((src->y+0.5) / GZ(17) * socalled_mpp * 360)); } -static void real_google_download ( MapCoord *src, const gchar *dest_fn, const char *verstr ) +static int real_google_download ( MapCoord *src, const gchar *dest_fn, const char *verstr ) { - gchar *uri = g_strdup_printf ( "/mt?v=%s&x=%d&y=%d&zoom=%d", verstr, src->x, src->y, src->scale ); - a_http_download_get_url ( "mt.google.com", uri, dest_fn ); + int res; + gchar *uri = g_strdup_printf ( "/mt?n=404&v=%s&x=%d&y=%d&zoom=%d", verstr, src->x, src->y, src->scale ); + res = a_http_download_get_url ( "mt.google.com", uri, dest_fn, &google_options ); g_free ( uri ); + return res; +} + +static int google_download ( MapCoord *src, const gchar *dest_fn ) +{ + const gchar *vers_str = google_version_number(src, TYPE_GOOGLE_MAPS); + return(real_google_download ( src, dest_fn, vers_str )); } -void google_download ( MapCoord *src, const gchar *dest_fn ) +static int google_trans_download ( MapCoord *src, const gchar *dest_fn ) { - real_google_download ( src, dest_fn, GOOGLE_VERSION ); + const gchar *vers_str = google_version_number(src, TYPE_GOOGLE_TRANS); + return(real_google_download ( src, dest_fn, vers_str )); } -void google_trans_download ( MapCoord *src, const gchar *dest_fn ) +static int google_terrain_download ( MapCoord *src, const gchar *dest_fn ) { - real_google_download ( src, dest_fn, GOOGLE_TRANS_VERSION ); + const gchar *vers_str = google_version_number(src, TYPE_GOOGLE_TERRAIN); + return(real_google_download ( src, dest_fn, vers_str )); } static char *kh_encode(guint32 x, guint32 y, guint8 scale) @@ -146,11 +297,14 @@ static char *kh_encode(guint32 x, guint32 y, guint8 scale) return buf; } -void google_kh_download ( MapCoord *src, const gchar *dest_fn ) +static int google_kh_download ( MapCoord *src, const gchar *dest_fn ) { + int res; gchar *khenc = kh_encode( src->x, src->y, src->scale ); - gchar *uri = g_strdup_printf ( "/kh?v=%s&t=%s", GOOGLE_KH_VERSION, khenc ); + const gchar *vers_str = google_version_number(src, TYPE_GOOGLE_SAT); + gchar *uri = g_strdup_printf ( "/kh?n=404&v=%s&t=%s", vers_str, khenc ); g_free ( khenc ); - a_http_download_get_url ( "kh.google.com", uri, dest_fn ); + res = a_http_download_get_url ( "khm.google.com", uri, dest_fn, &google_options ); g_free ( uri ); + return(res); }