I have some code like so:
var readImage = function(snapshot) {
var s = new cv.ImageDataStream()
var p = new Promise(function(resolve, reject) {
s.on("load", function(matrix) {
resolve(matrix);
});
})
snapshot.pipe(s);
return p;
};
Where cv is node-opencv. Unfortunately, it calls out to some C++, which fails if the data it receives is empty or invalid. It just explodes (no exception handling). Is there a way I can resolve that snapshot stream to a buffer or something, check it's contents, and then convert it back into a stream and pipe it back into cv?
I believe that if you are listening for errors on a stream it won't raise an exception and call your callback instead.
Try to...
s.on('error', function(e) {
// handle e
})
...to prevent an exception to be thrown.