134 lines
4.1 KiB
JavaScript
134 lines
4.1 KiB
JavaScript
var winston = require('winston');
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var Busboy = require('busboy');
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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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options = {};
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}
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this.keyLength = options.keyLength || DocumentHandler.defaultKeyLength;
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this.maxLength = options.maxLength; // none by default
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this.store = options.store;
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this.keyGenerator = options.keyGenerator;
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};
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DocumentHandler.defaultKeyLength = 10;
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// Handle retrieving a document
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DocumentHandler.prototype.handleGet = function(key, response, skipExpire) {
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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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}, skipExpire);
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};
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// Handle retrieving the raw version of a document
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DocumentHandler.prototype.handleRawGet = function(key, response, skipExpire) {
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this.store.get(key, function(ret) {
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if (ret) {
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winston.verbose('retrieved raw document', { key: key });
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response.writeHead(200, { 'content-type': 'text/plain' });
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response.end(ret);
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}
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else {
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winston.warn('raw 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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}, skipExpire);
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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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var cancelled = false;
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// What to do when done
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var onSuccess = function () {
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// Check length
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if (_this.maxLength && buffer.length > _this.maxLength) {
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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(
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JSON.stringify({ message: 'Document exceeds maximum length.' })
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);
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return;
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}
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// And then save if we should
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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.writeHead(200, { 'content-type': 'application/json' });
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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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// If we should, parse a form to grab the data
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var ct = request.headers['content-type'];
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if (ct && ct.split(';')[0] === 'multipart/form-data') {
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var busboy = new Busboy({ headers: request.headers });
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busboy.on('field', function (fieldname, val) {
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if (fieldname === 'data') {
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buffer = val;
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}
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});
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busboy.on('finish', function () {
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onSuccess();
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});
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request.pipe(busboy);
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// Otherwise, use our own and just grab flat data from POST body
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} else {
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request.on('data', function (data) {
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buffer += data.toString();
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});
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request.on('end', function () {
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if (cancelled) { return; }
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onSuccess();
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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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cancelled = true;
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});
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}
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};
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// Keep choosing keys until one isn't taken
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DocumentHandler.prototype.chooseKey = function(callback) {
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var key = this.acceptableKey();
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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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DocumentHandler.prototype.acceptableKey = function() {
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return this.keyGenerator.createKey(this.keyLength);
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};
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module.exports = DocumentHandler;
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