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121d8be9 FT |
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; | |
3095582d | 46 | static char *stylesheet = NULL; |
121d8be9 FT |
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 | { | |
060376d4 | 76 | char *title; |
121d8be9 | 77 | |
3095582d | 78 | title = sstrdup(htmlquote(name)); |
121d8be9 FT |
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"); | |
121d8be9 | 83 | bprintf(dst, "<title>Index of %s</title>\n", title); |
3095582d | 84 | if(stylesheet) { |
060376d4 | 85 | bprintf(dst, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%s\" />\n", htmlquote(stylesheet)); |
3095582d | 86 | } else { |
870af1cc | 87 | bprintf(dst, "<style type=\"text/css\">\n"); |
3095582d FT |
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"); | |
926848cd | 94 | bprintf(dst, ".dir .filename:before {content: \"\342\206\263 \"}\n"); |
3095582d FT |
95 | bprintf(dst, ".exec {background: #dfd;}\n"); |
96 | bprintf(dst, "</style>\n"); | |
97 | } | |
121d8be9 FT |
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); | |
3095582d | 141 | bprintf(dst, "<div class=\"dirindex\"><table>\n"); |
121d8be9 FT |
142 | for(i = 0; i < dirbuf.d; i++) { |
143 | bprintf(dst, "<tr class=\"dentry"); | |
3095582d | 144 | if(S_ISDIR(dirbuf.b[i].sb.st_mode)) { |
121d8be9 | 145 | bprintf(dst, " dir"); |
3095582d FT |
146 | } else { |
147 | if(dirbuf.b[i].x) | |
148 | bprintf(dst, " exec"); | |
149 | } | |
121d8be9 FT |
150 | if(dirbuf.b[i].w) |
151 | bprintf(dst, " writable"); | |
121d8be9 | 152 | bprintf(dst, "\">"); |
9f1a1144 FT |
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>"); | |
3095582d FT |
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 | } | |
121d8be9 FT |
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 | } | |
3095582d | 167 | bprintf(dst, "</table></div>\n"); |
121d8be9 FT |
168 | } |
169 | ||
170 | static void usage(void) | |
171 | { | |
3095582d | 172 | flog(LOG_ERR, "usage: htls [-hms] [-c STYLESHEET] METHOD URL REST"); |
121d8be9 FT |
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, ""); | |
3095582d | 184 | while((c = getopt(argc, argv, "hmsc:")) >= 0) { |
121d8be9 FT |
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; | |
3095582d FT |
195 | case 'c': |
196 | stylesheet = optarg; | |
197 | break; | |
121d8be9 FT |
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 | } |