diff --git a/examples/helpers/store.js b/examples/helpers/store.js new file mode 100644 index 000000000..e2860573f --- /dev/null +++ b/examples/helpers/store.js @@ -0,0 +1,64 @@ + +// +// just to make these example a little bit interesting, +// make a little key value store with an http interface +// (see couchbd for a grown-up version of this) +// +// API: +// GET / +// retrive list of keys +// +// GET /[url] +// retrive object stored at [url] +// will respond with 404 if there is nothing stored at [url] +// +// POST /[url] +// +// JSON.parse the body and store it under [url] +// will respond 400 (bad request) if body is not valid json. +// +// TODO: cached map-reduce views and auto-magic sharding. +// +var Store = module.exports = function Store () { + this.store = {}; +}; + +Store.prototype = { + get: function (key) { + return this.store[key] + }, + set: function (key, value) { + return this.store[key] = value + }, + handler:function () { + var store = this + return function (req, res) { + function send (obj, status) { + res.writeHead(200 || status,{'Content-Type': 'application/json'}) + res.write(JSON.stringify(obj) + '\n') + res.end() + } + var url = req.url.split('?').shift() + if (url === '/') { + console.log('get index') + return send(Object.keys(store.store)) + } else if (req.method == 'GET') { + var obj = store.get (url) + send(obj || {error: 'not_found', url: url}, obj ? 200 : 404) + } else { + //post: buffer body, and parse. + var body = '', obj + req.on('data', function (c) { body += c}) + req.on('end', function (c) { + try { + obj = JSON.parse(body) + } catch (err) { + return send (err, 400) + } + store.set(url, obj) + send({ok: true}) + }) + } + } + } +} diff --git a/examples/middleware/bodyDecoder-middleware.js b/examples/middleware/bodyDecoder-middleware.js new file mode 100644 index 000000000..555c3d154 --- /dev/null +++ b/examples/middleware/bodyDecoder-middleware.js @@ -0,0 +1,119 @@ +/* + bodyDecoder-middleware.js: Basic example of `connect.bodyParser()` middleware in node-http-proxy + + Copyright (c) Nodejitsu 2013 + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +*/ + +var http = require('http'), + connect = require('connect'), + request = require('request'), + colors = require('colors'), + util = require('util'), + Store = require('../helpers/store'), + httpProxy = require('../../lib/http-proxy'), + proxy = httpProxy.createProxyServer({}); + +http.createServer(new Store().handler()).listen(7531, function () { + util.puts('http '.blue + 'greetings '.green + 'server'.blue + ' started '.green.bold + 'on port '.blue + '7531'.yellow); +//try these commands: +// get index: +// curl localhost:7531 +// [] +// +// get a doc: +// curl localhost:7531/foo +// {"error":"not_found"} +// +// post an doc: +// curl -X POST localhost:7531/foo -d '{"content": "hello", "type": "greeting"}' +// {"ok":true} +// +// get index (now, not empty) +// curl localhost:7531 +// ["/foo"] +// +// get doc +// curl localhost:7531/foo +// {"content": "hello", "type": "greeting"} + +// +// now, suppose we wanted to direct all objects where type == "greeting" to a different store +// than where type == "insult" +// +// we can use connect connect-bodyDecoder and some custom logic to send insults to another Store. + +//insult server: + + http.createServer(new Store().handler()).listen(2600, function () { + util.puts('http '.blue + 'insults '.red + 'server'.blue + ' started '.green.bold + 'on port '.blue + '2600'.yellow); + + //greetings -> 7531, insults-> 2600 + + // now, start a proxy server. + + //don't worry about incoming contont type + //bodyParser.parse[''] = JSON.parse + + connect.createServer( + //refactor the body parser and re-streamer into a separate package + connect.bodyParser(), + //body parser absorbs the data and end events before passing control to the next + // middleware. if we want to proxy it, we'll need to re-emit these events after + //passing control to the middleware. + require('connect-restreamer')(), + function (req, res) { + //if your posting an obect which contains type: "insult" + //it will get redirected to port 2600. + //normal get requests will go to 7531 nad will not return insults. + var port = (req.body && req.body.type === 'insult' ? 2600 : 7531) + proxy.web(req, res, { target: { host: 'localhost', port: port }}); + } + ).listen(1337, function () { + util.puts('http proxy server'.blue + ' started '.green.bold + 'on port '.blue + '1337'.yellow); + //bodyParser needs content-type set to application/json + //if we use request, it will set automatically if we use the 'json:' field. + function post (greeting, type) { + request.post({ + url: 'http://localhost:1337/' + greeting, + json: {content: greeting, type: type || "greeting"} + }) + } + post("hello") + post("g'day") + post("kiora") + post("houdy") + post("java", "insult") + + //now, the insult should have been proxied to 2600 + + //curl localhost:2600 + //["/java"] + + //but the greetings will be sent to 7531 + + //curl localhost:7531 + //["/hello","/g%27day","/kiora","/houdy"] + + }) + }) +}); \ No newline at end of file diff --git a/examples/package.json b/examples/package.json index 7db2ae68a..3daede1f1 100644 --- a/examples/package.json +++ b/examples/package.json @@ -6,6 +6,8 @@ "colors": "~0.6.2", "socket.io": "~0.9.16", "socket.io-client": "~0.9.16", - "connect": "~2.11.0" + "connect": "~2.11.0", + "request": "~2.27.0", + "connect-restreamer": "~1.0.0" } }