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mime: rewrite detection function

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2015-08-17 14:35:20 +02:00
parent 790d2498cb
commit 73f199be3f
1 changed files with 26 additions and 36 deletions
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62
shared.c
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@ -563,49 +563,39 @@ char *expand_macros(const char *txt)
char *get_mimetype_for_filename(const char *filename)
{
static const char *delimiters;
char *ext = NULL, *iterate, *mimetype = NULL, *token;
char line[1024];
FILE *fd;
char *ext, *mimetype, *token, line[1024];
FILE *file;
struct string_list_item *mime;
if (filename == NULL)
if (!filename)
return NULL;
ext = strrchr(filename, '.');
if (!ext)
return NULL;
++ext;
if (!ext[0])
return NULL;
mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
if (mime)
return xstrdup(mime->util);
if (ext && *(++ext)) {
mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
if (mime) {
/* We could just pass the pointer here, but would have to care
* whether or not to free the memory. Instead just dup. */
mimetype = xstrdup(mime->util);
} else if (ctx.cfg.mimetype_file != NULL) {
fd = fopen(ctx.cfg.mimetype_file, "r");
if (fd == NULL)
return NULL;
delimiters = " \t\r\n";
/* loop over all lines in the file */
while (mimetype == NULL && fgets(line, sizeof(line), fd)) {
iterate = strtok(line, delimiters);
/* skip empty lines and comment lines */
if (iterate == NULL || (iterate[0] == '#'))
continue;
/* loop over all extensions of mimetype */
while ((token = strtok(NULL, delimiters))) {
if (strcasecmp(ext, token) == 0) {
mimetype = xstrdup(iterate);
break;
}
}
if (!ctx.cfg.mimetype_file)
return NULL;
file = fopen(ctx.cfg.mimetype_file, "r");
if (!file)
return NULL;
while (fgets(line, sizeof(line), file)) {
if (!line[0] || line[0] == '#')
continue;
mimetype = strtok(line, " \t\r\n");
while ((token = strtok(NULL, " \t\r\n"))) {
if (!strcasecmp(ext, token)) {
fclose(file);
return xstrdup(mimetype);
}
fclose(fd);
}
}
return mimetype;
fclose(file);
return NULL;
}