不支持bmp图片文件,不支持的文件打开后没有关闭

[hansdcr]

static int get_ext_header(char *filename)
{
FILE *handle;
handle = fopen(filename, "rb");
int ret = NGX_IMAGE_NONE; //添加处理，访问格式不存在时关闭打开的文件

if(!handle) {
    return NGX_IMAGE_NONE;
} else {
    unsigned short filetype;//bmp 0x4D42
    if(fread(&filetype, sizeof(unsigned short), 1, handle)) {
        if( filetype == 0xD8FF) {
            ret = NGX_IMAGE_JPEG;
        } else if( filetype == 0x4947) {
            ret = NGX_IMAGE_GIF;
        } else if( filetype == 0x5089) {
            ret = NGX_IMAGE_PNG;
        } else if ( filetype == 0x4d42) {
            ret = NGX_IMAGE_BMP; //添加处理bmp格式
        }

#if 0
else {
ret = NGX_IMAGE_NONE;
}
#endif
}
}
fclose(handle);
return ret;
}