iframe-proxy | Sunbelt Computer Software

31 lines (27 loc) · 796 Bytes

var FS = require('fs');

// Caching wrapper around the real FS.readFile

var requestCache = {};

function cachingReadFile(filename, callback) {

// First check for a cache hit

if (requestCache.hasOwnProperty(filename)) {

var value = requestCache[filename];

// Delay result till next tick to act async

process.nextTick(function () {

callback(null, value);

});

return;

}

// Otherwise start a real request

FS.readFile(filename, onRealRead);

// Cache the result if there is no error

function onRealRead(err, contents) {

if (!err) requestCache[filename] = contents;

callback(err, contents);

}

// Request the same resource 10,000 times serially

var left = 10000;

(function next() {

if (!(left--)) return;

cachingReadFile(__filename, next);

}());

Sunbelt Computer Software