Created
October 11, 2012 05:12
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| var connect = require('connect'), | |
| mongodb = require('mongodb'); | |
| var showDBInfo = function(req,res) { | |
| res.end("You are connected to the database"); | |
| }; | |
| var noDatabaseError = function(res) { | |
| res.statusCode = 500; | |
| res.end("Unable to connect to database"); | |
| } | |
| var vcap_service_connect = function(service_type,req,res,next) { | |
| var s = JSON.parse(process.env.VCAP_SERVICES)[service_type]; | |
| if ( s == null || s.length < 1 ) { | |
| noDatabaseError(res); | |
| } else { | |
| s = s[0]["credentials"]; | |
| var server = new mongodb.Server( s["host"], s["port"]); | |
| new mongodb.Db( s["db"], server, {} ).open( function(err,c) { | |
| c.authenticate( s["username"], s["password"], function(err,client) { | |
| if ( err ) { | |
| noDatabaseError(res); | |
| } else { | |
| req.connection = connection = client; | |
| next(); | |
| } | |
| }); | |
| }); | |
| } | |
| } | |
| var localhost_connect = function(name,req,res,next) { | |
| var server = new mongodb.Server("127.0.0.1",27017,{}); | |
| new mongodb.Db( name, server, {}).open( function(err,client) { | |
| if ( err ) { | |
| res.statusCode = 500; | |
| res.end("Unable to connect to database"); | |
| } else { | |
| req.connection = connection = client; | |
| next(); | |
| } | |
| }); | |
| } | |
| var dbConnection = function(name) { | |
| var connection = null; | |
| return function(req,res,next) { | |
| if ( connection ) { | |
| req.connection = connection; | |
| next(); | |
| } else { | |
| if ( process.env.VCAP_SERVICES ) { | |
| vcap_service_connect("mongodb-1.8",req,res,next); | |
| } else { | |
| localhost_connect(name,req,res,next); | |
| } | |
| } | |
| } | |
| } | |
| var port = process.env.VCAP_APP_PORT || process.env.PORT || 3000; | |
| connect.createServer( dbConnection("middleware-test"), showDBInfo).listen(port); | |
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| { | |
| "name": "db-middleware", | |
| "version": "0.0.1", | |
| "dependencies":{ | |
| "connect":"1.8.3", | |
| "mongodb":"0.9.7-2-2" | |
| } | |
| } |
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