64 lines
1.6 KiB
JavaScript
64 lines
1.6 KiB
JavaScript
var fs = require('fs');
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var crypto = require('crypto');
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var winston = require('winston');
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// For storing in files
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// options[type] = file
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// options[path] - Where to store
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var FileDocumentStore = function(options) {
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this.basePath = options.path || './data';
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this.expire = options.expire;
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};
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// Generate md5 of a string
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FileDocumentStore.md5 = function(str) {
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var md5sum = crypto.createHash('md5');
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md5sum.update(str);
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return md5sum.digest('hex');
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};
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// Save data in a file, key as md5 - since we don't know what we could
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// be passed here
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FileDocumentStore.prototype.set = function(key, data, callback, skipExpire) {
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try {
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var _this = this;
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fs.mkdir(this.basePath, '700', function() {
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var fn = _this.basePath + '/' + FileDocumentStore.md5(key);
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fs.writeFile(fn, data, 'utf8', function(err) {
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if (err) {
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callback(false);
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}
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else {
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callback(true);
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if (_this.expire && !skipExpire) {
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winston.warn('file store cannot set expirations on keys');
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}
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}
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});
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});
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} catch(err) {
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callback(false);
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}
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};
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// Get data from a file from key
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FileDocumentStore.prototype.get = function(key, callback, skipExpire) {
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var _this = this;
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var fn = this.basePath + '/' + FileDocumentStore.md5(key);
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fs.readFile(fn, 'utf8', function(err, data) {
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if (err) {
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callback(false);
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}
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else {
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callback(data);
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if (_this.expire && !skipExpire) {
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winston.warn('file store cannot set expirations on keys');
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}
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}
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});
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};
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module.exports = FileDocumentStore;
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