Add an express demo for metadata apis, upload/download
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Raymond Feng
parent
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commit
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var Uploader = require('../lib/storage-handler.js');
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var express = require('express');
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var app = express();
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app.configure(function () {
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app.set('port', process.env.PORT || 3000);
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app.set('views', __dirname + '/views');
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app.set('view engine', 'ejs');
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app.use(express.favicon());
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// app.use(express.logger('dev'));
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app.use(express.methodOverride());
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app.use(app.router);
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});
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var handler = new Uploader({provider: 'filesystem', root: '/tmp/storage'});
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app.get('/', function (req, res, next) {
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res.setHeader('Content-Type', 'text/html');
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var form = "<html><body><form method='POST' enctype='multipart/form-data' action='/upload/c1'>"
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+ " File to upload: <input type=file name=upfile><br>"
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+ " Notes about the file: <input type=text name=note><br>"
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+ " <input type=submit value=Upload></form></body></html>";
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res.send(form);
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res.end();
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});
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app.post('/upload/:container', function (req, res, next) {
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handler.processUpload(req, res, function (err, result) {
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if (!err) {
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res.setHeader('Content-Type', 'application/json');
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res.send(200, result);
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} else {
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res.send(500, err);
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}
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});
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});
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app.get('/download', function (req, res, next) {
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handler.client.getContainers(function (err, containers) {
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var html = "<body><h1>Containers</h1><ul>";
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containers.forEach(function (f) {
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html += "<li><a href='" + f.name + "'>" + f.name + "</a></li>"
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});
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res.send(200, html);
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});
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});
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app.get('/download/:container', function (req, res, next) {
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handler.client.getFiles(req.params.container, function (err, files) {
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var html = "<body><h1>Files</h1><ul>";
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files.forEach(function (f) {
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html += "<li><a href='" + f.container + "/" + f.name + "'>" + f.container + "/" + f.name + "</a></li>"
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});
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res.send(200, html);
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});
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});
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app.get('/download/:container/:file', function (req, res, next) {
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handler.processDownload(req, res, function (err, result) {
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if (err) {
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res.send(500, err);
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}
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});
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});
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app.listen(app.get('port'));
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@ -0,0 +1,87 @@
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var factory = require('./index');
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var IncomingForm = require('formidable');
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var StringDecoder = require('string_decoder').StringDecoder;
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module.exports = Uploader;
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function Uploader(options) {
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if (!(this instanceof Uploader)) {
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return new Uploader(options);
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}
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this.client = factory.createClient(options);
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this.options = options;
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}
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Uploader.prototype.processUpload = function (req, res, cb) {
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var client = this.client;
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var form = new IncomingForm(this.options);
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var container = req.params.container;
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var fields = {};
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var files = {};
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form.handlePart = function (part) {
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var self = this;
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if (part.filename === undefined) {
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var value = ''
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, decoder = new StringDecoder(this.encoding);
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part.on('data', function (buffer) {
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self._fieldsSize += buffer.length;
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if (self._fieldsSize > self.maxFieldsSize) {
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self._error(new Error('maxFieldsSize exceeded, received ' + self._fieldsSize + ' bytes of field data'));
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return;
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}
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value += decoder.write(buffer);
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});
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part.on('end', function () {
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fields[part.name] = value;
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self.emit('field', part.name, value);
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});
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return;
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}
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this._flushing++;
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var writer = client.upload({container: container, remote: part.filename});
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part.on('data', function (buffer) {
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self.pause();
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writer.write(buffer, function () {
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self.resume();
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});
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});
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part.on('end', function () {
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writer.end(function () {
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self._flushing--;
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files[part.name] = part.filename;
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self._maybeEnd();
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});
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});
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};
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form.parse(req, function (err, result) {
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console.log(result);
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cb && cb(err, {files: files, fields: fields});
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});
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}
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Uploader.prototype.processDownload = function(req, res, cb) {
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var reader = this.client.download({
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container: req.params.container,
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remote: req.params.file
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});
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reader.pipe(res);
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reader.on('error', function(err) {
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cb && cb(err);
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});
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reader.on('end', function(err, result) {
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cb && cb(err, result);
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});
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}
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@ -11,6 +11,8 @@
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"async": "latest"
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},
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"devDependencies": {
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"express": "latest",
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"formidable": "latest",
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"mocha": "latest",
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"supertest": "latest"
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},
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