92 lines
2.9 KiB
JavaScript
92 lines
2.9 KiB
JavaScript
var winston = require('winston');
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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 || 10;
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this.maxLength = options.maxLength; // none by default
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this.store = options.store;
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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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this.store.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 _this = this;
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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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if (_this.maxLength && buffer.length > _this.maxLength) {
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_this.cancelled = true;
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winston.warn('document >maxLength', { maxLength: _this.maxLength });
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response.writeHead(400, { 'content-type': 'application/json' });
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response.end(JSON.stringify({ message: 'document exceeds maximum length' }));
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}
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});
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request.on('end', function(end) {
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if (_this.cancelled) return;
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_this.chooseKey(function(key) {
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_this.store.set(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.writeHead(500, { 'content-type': 'application/json' });
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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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});
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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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// Get a random key that hasn't been already used
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DocumentHandler.prototype.chooseKey = function(callback) {
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var key = this.randomKey();
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var _this = this;
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this.store.get(key, function(ret) {
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if (ret) {
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_this.chooseKey(callback);
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} else {
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callback(key);
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}
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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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