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Reject text files resembling TGA images

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Fixes issue #295

The imlib2 TGA loader returns an imlib image handle without any actual data
when given a text file like this:

    T
    Content-Type: application/javascript
    Content-Length: 3836
    Last-Modified: Wed, 23 Sep 2015 12:25:47 GMT
    Etag: "56029a4b-efc"
    Expires: Sat, 20 Aug 2016 15:14:33 GMT
    Cache-Control: max-age=604800, public
    Accept-Ranges: bytes

Fortunately, `imlib_image_get_data()` returns NULL in this case, so that we can
use it as an additional check when opening files.
This commit is contained in:
Bert Münnich
2017-11-23 14:35:32 +01:00
parent 9dabc5f988
commit f02661879f
3 changed files with 26 additions and 18 deletions
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10
thumbs.c
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@ -32,6 +32,7 @@
#include <libexif/exif-data.h>
void exif_auto_orientate(const fileinfo_t*);
#endif
Imlib_Image img_open(const fileinfo_t*);
static char *cache_dir;
@ -237,7 +238,6 @@ bool tns_load(tns_t *tns, int n, bool force, bool cache_only)
char *cfile;
thumb_t *t;
fileinfo_t *file;
struct stat st;
Imlib_Image im = NULL;
if (n < 0 || n >= *tns->cnt)
@ -331,14 +331,8 @@ bool tns_load(tns_t *tns, int n, bool force, bool cache_only)
}
if (im == NULL) {
if (access(file->path, R_OK) == -1 ||
stat(file->path, &st) == -1 || !S_ISREG(st.st_mode) ||
(im = imlib_load_image(file->path)) == NULL)
{
if (file->flags & FF_WARN)
error(0, 0, "%s: Error opening image", file->name);
if ((im = img_open(file)) == NULL)
return false;
}
}
imlib_context_set_image(im);