92 lines
2.6 KiB
JavaScript
92 lines
2.6 KiB
JavaScript
var fs = require('fs'); // TODO won't be needed
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var winston = require('winston');
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var hashlib = require('hashlib');
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// For handling serving stored documents
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var DocumentHandler = function(options) {
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if (options) {
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this.keyLength = options.keyLength || 20;
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}
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};
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// Save a document
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// TODO make data path configurable
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// TODO move to a separate object
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DocumentHandler.save = function(key, data, callback) {
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fs.mkdir('data', '700', function() {
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fs.writeFile('data/' + hashlib.md5(key), data, 'utf8', function() {
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callback(true); // TODO handle errors
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});
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});
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};
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// Retrieve a document by key
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DocumentHandler.get = function(key, callback) {
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fs.readFile('data/' + hashlib.md5(key), '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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}
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});
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};
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// Handle retrieving a document
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DocumentHandler.prototype.handleGet = function(key, response) {
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DocumentHandler.get(key, function(ret) {
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if (ret) {
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winston.verbose('retrieved document', { key: key });
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response.writeHead(200, { 'content-type': 'application/json' });
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response.end(JSON.stringify({ data: ret, key: key }));
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}
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else {
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winston.warn('document not found', { key: key });
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response.writeHead(404, { 'content-type': 'application/json' });
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response.end(JSON.stringify({ message: 'document not found' }));
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}
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});
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};
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// Handle adding a new Document
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DocumentHandler.prototype.handlePost = function(request, response) {
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var key = this.randomKey();
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var buffer = '';
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request.on('data', function(data) {
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if (!buffer) {
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response.writeHead(200, { 'content-type': 'application/json' });
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}
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buffer += data.toString();
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});
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request.on('end', function(end) {
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DocumentHandler.save(key, buffer, function(res) {
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if (res) {
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winston.verbose('added document', { key: key });
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response.end(JSON.stringify({ key: key }));
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}
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else {
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winston.verbose('error adding document');
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response.end(JSON.stringify({ message: 'error adding document' }));
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}
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});
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});
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request.on('error', function(error) {
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winston.error('connection error: ' + error.message);
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response.writeHead(500, { 'content-type': 'application/json' });
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response.end(JSON.stringify({ message: 'connection error' }));
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});
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};
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// Generate a random key
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DocumentHandler.prototype.randomKey = function() {
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var text = '';
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var keyspace = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
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for (var i = 0; i < this.keyLength; i++) {
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text += keyspace.charAt(Math.floor(Math.random() * keyspace.length));
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}
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return text;
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};
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module.exports = DocumentHandler;
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