| 1 | /* |
| 2 | ashd - A Sane HTTP Daemon |
| 3 | Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com> |
| 4 | |
| 5 | This program is free software: you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation, either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <unistd.h> |
| 21 | #include <stdio.h> |
| 22 | #include <dirent.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <string.h> |
| 25 | #include <errno.h> |
| 26 | #include <time.h> |
| 27 | #include <stdint.h> |
| 28 | #include <locale.h> |
| 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | #include <config.h> |
| 32 | #endif |
| 33 | #include <utils.h> |
| 34 | #include <resp.h> |
| 35 | #include <log.h> |
| 36 | #include <resp.h> |
| 37 | |
| 38 | struct dentry { |
| 39 | char *name; |
| 40 | struct stat sb; |
| 41 | int w, x; |
| 42 | }; |
| 43 | |
| 44 | static int dispmtime = 0; |
| 45 | static int dispsize = 0; |
| 46 | static char *stylesheet = NULL; |
| 47 | |
| 48 | static void checkcache(struct stat *sb) |
| 49 | { |
| 50 | char *hdr; |
| 51 | |
| 52 | if((hdr = getenv("REQ_IF_MODIFIED_SINCE")) != NULL) { |
| 53 | if(parsehttpdate(hdr) < sb->st_mtime) |
| 54 | return; |
| 55 | printf("HTTP/1.1 304 Not Modified\n"); |
| 56 | printf("Date: %s\n", fmthttpdate(time(NULL))); |
| 57 | printf("Content-Length: 0\n"); |
| 58 | printf("\n"); |
| 59 | exit(0); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | static int dcmp(const void *ap, const void *bp) |
| 64 | { |
| 65 | const struct dentry *a = ap, *b = bp; |
| 66 | |
| 67 | if(S_ISDIR(a->sb.st_mode) && !S_ISDIR(b->sb.st_mode)) |
| 68 | return(-1); |
| 69 | if(!S_ISDIR(a->sb.st_mode) && S_ISDIR(b->sb.st_mode)) |
| 70 | return(1); |
| 71 | return(strcoll(a->name, b->name)); |
| 72 | } |
| 73 | |
| 74 | static void head(char *name, struct charbuf *dst) |
| 75 | { |
| 76 | char *title; |
| 77 | |
| 78 | title = sstrdup(htmlquote(name)); |
| 79 | bprintf(dst, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"); |
| 80 | bprintf(dst, "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">\n"); |
| 81 | bprintf(dst, "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n"); |
| 82 | bprintf(dst, "<head>\n"); |
| 83 | bprintf(dst, "<title>Index of %s</title>\n", title); |
| 84 | if(stylesheet) { |
| 85 | bprintf(dst, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%s\" />\n", htmlquote(stylesheet)); |
| 86 | } else { |
| 87 | bprintf(dst, "<style type=\"text/css\">\n"); |
| 88 | bprintf(dst, "body {font-family: sans-serif; background: #eee;}\n"); |
| 89 | bprintf(dst, ".dirindex {background: white; padding: 1em; border: thin solid #ccc;}\n"); |
| 90 | bprintf(dst, ".dirindex table {border-collapse: collapse;}\n"); |
| 91 | bprintf(dst, ".dirindex td {padding: 0 1em;}\n"); |
| 92 | bprintf(dst, ".dentry:hover {background: #ddd;}\n"); |
| 93 | bprintf(dst, ".dir {background: #ddf;}\n"); |
| 94 | bprintf(dst, ".dir .filename:before {content: \"\342\206\263 \"}\n"); |
| 95 | bprintf(dst, ".exec {background: #dfd;}\n"); |
| 96 | bprintf(dst, "</style>\n"); |
| 97 | } |
| 98 | bprintf(dst, "</head>\n"); |
| 99 | bprintf(dst, "<body>\n"); |
| 100 | bprintf(dst, "<h1>Index of %s</h1>\n", title); |
| 101 | free(title); |
| 102 | } |
| 103 | |
| 104 | static void foot(struct charbuf *dst) |
| 105 | { |
| 106 | bprintf(dst, "</body>\n"); |
| 107 | bprintf(dst, "</html>\n"); |
| 108 | } |
| 109 | |
| 110 | static void mkindex(char *name, DIR *dir, struct charbuf *dst) |
| 111 | { |
| 112 | struct { |
| 113 | struct dentry *b; |
| 114 | size_t s, d; |
| 115 | } dirbuf; |
| 116 | struct dentry f; |
| 117 | struct dirent *dent; |
| 118 | char *fn; |
| 119 | int i; |
| 120 | |
| 121 | bufinit(dirbuf); |
| 122 | while((dent = readdir(dir)) != NULL) { |
| 123 | if(*dent->d_name == '.') |
| 124 | continue; |
| 125 | memset(&f, 0, sizeof(f)); |
| 126 | f.name = sstrdup(dent->d_name); |
| 127 | fn = sprintf3("%s/%s", name, dent->d_name); |
| 128 | if(access(fn, R_OK)) |
| 129 | continue; |
| 130 | if(stat(fn, &f.sb)) |
| 131 | continue; |
| 132 | if(!access(fn, W_OK)) |
| 133 | f.w = 1; |
| 134 | if(!access(fn, X_OK)) |
| 135 | f.x = 1; |
| 136 | else if(S_ISDIR(f.sb.st_mode)) |
| 137 | continue; |
| 138 | bufadd(dirbuf, f); |
| 139 | } |
| 140 | qsort(dirbuf.b, dirbuf.d, sizeof(struct dentry), dcmp); |
| 141 | bprintf(dst, "<div class=\"dirindex\"><table>\n"); |
| 142 | for(i = 0; i < dirbuf.d; i++) { |
| 143 | bprintf(dst, "<tr class=\"dentry"); |
| 144 | if(S_ISDIR(dirbuf.b[i].sb.st_mode)) { |
| 145 | bprintf(dst, " dir"); |
| 146 | } else { |
| 147 | if(dirbuf.b[i].x) |
| 148 | bprintf(dst, " exec"); |
| 149 | } |
| 150 | if(dirbuf.b[i].w) |
| 151 | bprintf(dst, " writable"); |
| 152 | bprintf(dst, "\">"); |
| 153 | bprintf(dst, "<td class=\"filename\"><a href=\"%s\">", htmlquote(urlquote(dirbuf.b[i].name))); |
| 154 | bprintf(dst, "%s", htmlquote(dirbuf.b[i].name)); |
| 155 | bprintf(dst, "</a></td>"); |
| 156 | if(dispsize) { |
| 157 | bprintf(dst, "<td class=\"filesize\">"); |
| 158 | if(!S_ISDIR(dirbuf.b[i].sb.st_mode)) |
| 159 | bprintf(dst, "%ji", (intmax_t)dirbuf.b[i].sb.st_size); |
| 160 | bprintf(dst, "</td>"); |
| 161 | } |
| 162 | if(dispmtime) |
| 163 | bprintf(dst, "<td class=\"filemtime\">%s</td>", fmthttpdate(dirbuf.b[i].sb.st_mtime)); |
| 164 | bprintf(dst, "</tr>\n"); |
| 165 | free(dirbuf.b[i].name); |
| 166 | } |
| 167 | bprintf(dst, "</table></div>\n"); |
| 168 | } |
| 169 | |
| 170 | static void usage(void) |
| 171 | { |
| 172 | flog(LOG_ERR, "usage: htls [-hms] [-c STYLESHEET] METHOD URL REST"); |
| 173 | } |
| 174 | |
| 175 | int main(int argc, char **argv) |
| 176 | { |
| 177 | int c; |
| 178 | char *dname; |
| 179 | DIR *dir; |
| 180 | struct charbuf buf; |
| 181 | struct stat sb; |
| 182 | |
| 183 | setlocale(LC_ALL, ""); |
| 184 | while((c = getopt(argc, argv, "hmsc:")) >= 0) { |
| 185 | switch(c) { |
| 186 | case 'h': |
| 187 | usage(); |
| 188 | exit(0); |
| 189 | case 'm': |
| 190 | dispmtime = 1; |
| 191 | break; |
| 192 | case 's': |
| 193 | dispsize = 1; |
| 194 | break; |
| 195 | case 'c': |
| 196 | stylesheet = optarg; |
| 197 | break; |
| 198 | default: |
| 199 | usage(); |
| 200 | exit(1); |
| 201 | } |
| 202 | } |
| 203 | if(argc - optind < 3) { |
| 204 | usage(); |
| 205 | exit(1); |
| 206 | } |
| 207 | if((dname = getenv("REQ_X_ASH_FILE")) == NULL) { |
| 208 | flog(LOG_ERR, "htls: needs to be called with the X-Ash-File header"); |
| 209 | exit(1); |
| 210 | } |
| 211 | if(*argv[optind + 2]) { |
| 212 | simpleerror(1, 404, "Not Found", "The requested URL has no corresponding resource."); |
| 213 | exit(0); |
| 214 | } |
| 215 | |
| 216 | if(stat(dname, &sb) || ((dir = opendir(dname)) == NULL)) { |
| 217 | flog(LOG_ERR, "htls: could not open directory `%s': %s", dname, strerror(errno)); |
| 218 | simpleerror(1, 500, "Server Error", "Could not produce directory index."); |
| 219 | exit(1); |
| 220 | } |
| 221 | checkcache(&sb); |
| 222 | |
| 223 | bufinit(buf); |
| 224 | head(argv[optind + 1], &buf); |
| 225 | mkindex(dname, dir, &buf); |
| 226 | foot(&buf); |
| 227 | closedir(dir); |
| 228 | |
| 229 | printf("HTTP/1.1 200 OK\n"); |
| 230 | printf("Content-Type: text/html; charset=UTF-8\n"); |
| 231 | printf("Last-Modified: %s\n", fmthttpdate(sb.st_mtime)); |
| 232 | printf("Content-Length: %zi\n", buf.d); |
| 233 | printf("\n"); |
| 234 | fwrite(buf.b, 1, buf.d, stdout); |
| 235 | buffree(buf); |
| 236 | return(0); |
| 237 | } |