stream-catcher
v1.0.5
Published
a streaming wrapper around lru-cache
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7,372
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stream-catcher
a streaming wrapper around lru-cache
usage
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.
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: <Nms
getFile(filePath, response);
// Time passes, file falls out of cache...
// Next call ~ Nms
getFile(filePath, response);