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85611cd9 GB |
1 | /* |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
4 | * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
3292ba8b GB |
22 | #ifdef HAVE_CONFIG_H |
23 | #include "config.h" | |
24 | #endif | |
25 | ||
932f8f22 | 26 | #include <stdio.h> |
6e78a423 QT |
27 | #include <ctype.h> |
28 | #include <string.h> | |
f83131b9 MA |
29 | #include <glib.h> |
30 | #include <glib/gstdio.h> | |
4c77d5e0 | 31 | #include <glib/gi18n.h> |
932f8f22 | 32 | |
85611cd9 | 33 | #include "download.h" |
3292ba8b | 34 | |
3292ba8b | 35 | #include "curl_download.h" |
85611cd9 | 36 | |
1ac37c09 | 37 | gboolean a_check_html_file(FILE* f) |
6e78a423 | 38 | { |
533bbf34 MA |
39 | gchar **s; |
40 | gchar *bp; | |
6e78a423 | 41 | fpos_t pos; |
533bbf34 | 42 | gchar buf[33]; |
6e78a423 | 43 | size_t nr; |
533bbf34 | 44 | gchar * html_str[] = { |
6e78a423 QT |
45 | "<html", |
46 | "<!DOCTYPE html", | |
47 | "<head", | |
48 | "<title", | |
49 | NULL | |
50 | }; | |
51 | ||
c44594ee | 52 | memset(buf, 0, sizeof(buf)); |
6e78a423 QT |
53 | fgetpos(f, &pos); |
54 | rewind(f); | |
55 | nr = fread(buf, 1, sizeof(buf) - 1, f); | |
56 | fsetpos(f, &pos); | |
57 | for (bp = buf; (bp < (buf + sizeof(buf) - 1)) && (nr > (bp - buf)); bp++) { | |
58 | if (!(isspace(*bp))) | |
59 | break; | |
60 | } | |
61 | if ((bp >= (buf + sizeof(buf) -1)) || ((bp - buf) >= nr)) | |
1ac37c09 | 62 | return FALSE; |
6e78a423 | 63 | for (s = html_str; *s; s++) { |
1918a993 | 64 | if (strncasecmp(*s, bp, strlen(*s)) == 0) |
1ac37c09 | 65 | return TRUE; |
6e78a423 | 66 | } |
1ac37c09 GB |
67 | return FALSE; |
68 | } | |
69 | ||
70 | gboolean a_check_map_file(FILE* f) | |
71 | { | |
72 | return !a_check_html_file(f); | |
6e78a423 QT |
73 | } |
74 | ||
0c1044e9 | 75 | static int download( const char *hostname, const char *uri, const char *fn, DownloadOptions *options, gboolean ftp) |
932f8f22 GB |
76 | { |
77 | FILE *f; | |
78 | int ret; | |
533bbf34 | 79 | gchar *tmpfilename; |
1ac37c09 | 80 | gboolean failure = FALSE; |
932f8f22 GB |
81 | |
82 | /* Check file */ | |
45acf79e | 83 | if ( g_file_test ( fn, G_FILE_TEST_EXISTS ) == TRUE ) |
932f8f22 GB |
84 | { |
85 | /* File exists: return */ | |
86 | return -3; | |
87 | } else { | |
a1618d62 MA |
88 | gchar *dir = g_path_get_dirname ( fn ); |
89 | g_mkdir_with_parents ( dir , 0777 ); | |
90 | g_free ( dir ); | |
91 | ||
3335ae4e | 92 | /* create placeholder file */ |
8c060406 | 93 | if ( ! (f = g_fopen ( fn, "w+b" )) ) /* immediately open file so other threads won't -- prevents race condition */ |
932f8f22 | 94 | return -4; |
3335ae4e | 95 | fclose ( f ); |
8c060406 | 96 | f = NULL; |
3335ae4e EB |
97 | } |
98 | ||
99 | tmpfilename = g_strdup_printf("%s.tmp", fn); | |
8c060406 | 100 | f = g_fopen ( tmpfilename, "w+b" ); |
3335ae4e EB |
101 | if ( ! f ) { |
102 | g_free ( tmpfilename ); | |
8c060406 | 103 | g_remove ( fn ); /* couldn't create temporary. delete 0-byte file. */ |
3335ae4e | 104 | return -4; |
932f8f22 GB |
105 | } |
106 | ||
107 | /* Call the backend function */ | |
0c1044e9 | 108 | ret = curl_download_get_url ( hostname, uri, f, options, ftp ); |
1ac37c09 GB |
109 | if (ret == -1 || ret == 1 || ret == -2) { |
110 | g_debug("%s: download failed: curl_download_get_url=%d", __FUNCTION__, ret); | |
111 | failure = TRUE; | |
112 | } | |
113 | ||
114 | if (!failure && options != NULL && options->check_file != NULL && ! options->check_file(f)) { | |
115 | g_debug("%s: file content checking failed", __FUNCTION__); | |
116 | failure = TRUE; | |
117 | } | |
932f8f22 | 118 | |
1ac37c09 | 119 | if (failure) |
932f8f22 | 120 | { |
4258f4e2 | 121 | g_warning(_("Download error: %s"), fn); |
932f8f22 | 122 | fclose ( f ); |
8c060406 MA |
123 | f = NULL; |
124 | g_remove ( tmpfilename ); | |
3335ae4e | 125 | g_free ( tmpfilename ); |
8c060406 | 126 | g_remove ( fn ); /* couldn't create temporary. delete 0-byte file. */ |
932f8f22 GB |
127 | return -1; |
128 | } | |
129 | ||
130 | fclose ( f ); | |
8c060406 | 131 | f = NULL; |
533bbf34 | 132 | g_rename ( tmpfilename, fn ); /* move completely-downloaded file to permanent location */ |
3335ae4e | 133 | g_free ( tmpfilename ); |
932f8f22 GB |
134 | return ret; |
135 | } | |
136 | ||
85611cd9 GB |
137 | /* success = 0, -1 = couldn't connect, -2 HTTP error, -3 file exists, -4 couldn't write to file... */ |
138 | /* uri: like "/uri.html?whatever" */ | |
139 | /* only reason for the "wrapper" is so we can do redirects. */ | |
80214df2 | 140 | int a_http_download_get_url ( const char *hostname, const char *uri, const char *fn, DownloadOptions *opt ) |
85611cd9 | 141 | { |
0c1044e9 EB |
142 | return download ( hostname, uri, fn, opt, FALSE ); |
143 | } | |
144 | ||
145 | int a_ftp_download_get_url ( const char *hostname, const char *uri, const char *fn, DownloadOptions *opt ) | |
146 | { | |
147 | return download ( hostname, uri, fn, opt, TRUE ); | |
85611cd9 | 148 | } |