stream-catcher

a streaming wrapper around lru-cache

usage

``javascript

var streamCache = new StreamCatcher({lru-cache options});

// ask for the data at 'key' to be streamed to writeStream
streamCache.write('key', writeStream, notCachedCallback);

// ask to stream data to 'key' from readStream
streamCache.read('key', readStream);


`

example

stream files from disk to a http response, cached for next time.

`javascript

var streamCache = new StreamCatcher({
max: 1024 * 100, // 100kb
length: function(n){
return n.length;
}
});

var filePath = './foo/bar.txt';

function getFile(filePath, response){

streamCache.write(filePath, response, function(){
// function called if the cache is empty.
// If so, read into the cache
streamCache.read(filePath, fs.createReadStream(filePath));
});

}

// First call: Nms
getFile(filePath, response);

// Next call: getFile(filePath, response);

// Time passes, file falls out of cache...

// Next call ~ Nms
getFile(filePath, response);

``