Fix invalid characters in QR codes

source/camera.c

@@ -157,6 +157,18 @@ Result http_get(char *url, char *path)
     filename = strtok(content_disposition, "\"");
     filename = strtok(NULL, "\"");
 
+    char *illegal_characters = "\"?;:/\\+";
+    for (ssize_t i = 0; i < strlen(filename); i++)
+    {
+        for (ssize_t n = 0; n < strlen(illegal_characters); n++)
+        {
+            if (filename[i] == illegal_characters[n]) 
+            {
+                filename[i] = '-';
+            }
+        }
+    }
+
     do {
         ret = httpcDownloadData(&context, buf + size, 0x1000, &read_size);
         size += read_size;