1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mime.h"
struct mime_info {
char *mimetype;
char *extension;
};
size_t mimedb_ln;
struct mime_info *mimedb;
static int
mimedb_compar(const void *va, const void *vb)
{
const struct mime_info *a = va;
const struct mime_info *b = vb;
return strcmp(a->extension, b->extension);
}
void
mime_init()
{
size_t mimedb_sz = 4096;
mimedb = malloc(mimedb_sz * sizeof(struct mime_info));
FILE *f = fopen(MIMEDB, "r");
if (!f) {
fprintf(stderr, "Unable to open MIME database for reading: %s\n",
strerror(errno));
fprintf(stderr, "Is " MIMEDB " installed?\n");
assert(0);
}
char *line = NULL;
size_t n = 0;
while (getline(&line, &n, f) != -1) {
if (line[0] == '#') {
continue;
}
size_t l = strlen(line);
if (l > 1 && line[l - 1] == '\n') {
line[l - 1] = '\0';
}
if (mimedb_ln >= mimedb_sz) {
mimedb_sz *= 2;
struct mime_info *new = realloc(mimedb,
mimedb_sz * sizeof(struct mime_info));
assert(new);
mimedb = new;
}
char *mime = strdup(strtok(line, " \t"));
char *ext = strtok(NULL, " \t");
if (!ext) {
free(mime);
continue;
}
do {
mimedb[mimedb_ln].mimetype = strdup(mime);
mimedb[mimedb_ln].extension = strdup(ext);
++mimedb_ln;
} while ((ext = strtok(NULL, " \t")));
free(mime);
}
free(line);
fclose(f);
qsort(mimedb, mimedb_ln, sizeof(mimedb[0]), mimedb_compar);
}
void
mime_finish()
{
for (size_t i = 0; i < mimedb_ln; ++i) {
free(mimedb[i].mimetype);
free(mimedb[i].extension);
}
free(mimedb);
}
static bool
has_suffix(const char *str, const char *suff)
{
size_t a = strlen(str), b = strlen(suff);
if (a < b) {
return false;
}
return strncmp(&str[a - b], suff, b) == 0;
}
static int
path_compar(const void *va, const void *vb)
{
char *ext = (char *)va;
struct mime_info *mime = (struct mime_info *)vb;
return strcmp(ext, mime->extension);
}
const char *
mimetype_for_path(const char *path)
{
if (has_suffix(path, ".gmi") || has_suffix(path, ".gemini")) {
return "text/gemini";
}
char *ext = strrchr(path, '.');
if (!ext || !ext[1]) {
return "application/octet-stream";
}
++ext;
struct mime_info *mime = bsearch(
ext, mimedb, mimedb_ln, sizeof(mimedb[0]), path_compar);
if (!mime) {
return "application/octet-stream";
}
return mime->mimetype;
}
|
