我需要创建一个 Web 服务，并且我在服务器中使用 Node.js。但是当我在 localhost 中运行时出现错误:
Error: Most middleware (like bodyParser) is no longer bundled with Express and must be installed separately. Please see https://github.com/senchalabs/connect#middleware.
neo4jtest.js
var config = require('./config');
var bodyParser = require('body-parser');
var app = express();
var neo4jurl = process.env.NEO4J_URL ;
neo4jurl = neo4jurl +'/db/data/';
var query = [ 'START me=node:node_auto_index(name={inputusername}) MATCH me<--friend<--friend_of_friend where (friend_of_friend.entitytype={inputentitytype}) RETURN friend_of_friend;' ];
var insertquery = [ 'CREATE (user {entitytype:{inputentitytype}, name : {inputname}}) return user;' ];
var queryforallrelation = [ 'start n = node:node_auto_index(name={inputusername}) match(n)--(x) return x;'];
// Config
var env = process.env.NODE_ENV || 'development';
if ('development' == env) {
// configure stuff here
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(application_root, "public")));
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
}
app.get('/api', function (req, res) {
res.send('REST API is running');
});
app.get('/friendoffriend/:username', function (req, res){
res.set({'Content-Type': 'text/json'});
username = req.params.username;
type = 'user';
neo4j.connect(neo4jurl, function (err, graph) {
graph.query(query.join('\n'), {inputusername : username, inputentitytype :type} ,function (err, results) {
if (err) {
res.send(HTTPStatus.INTERNAL_SERVER_ERROR,'Internal Server Error');
}
else {
res.send(HTTPStatus.OK,JSON.stringify(results));
}
});
});
});
app.get('/insertuser/:username', function (req, res){
res.set({'Content-Type': 'text/json'});
username = req.params.username;
type = 'user';
neo4j.connect(neo4jurl, function (err, graph) {
graph.query(insertquery.join('\n'), {inputname : username, inputentitytype :type} ,function (err, results) {
if (err) {
res.send(HTTPStatus.INTERNAL_SERVER_ERROR,'Internal Server Error');
}
else {
res.send(HTTPStatus.OK,JSON.stringify(results));
}
});
});
});
//Cypher Query with Javascript Callback Example
function neo4jQuery(neo4jurl, query, parameters, giveresults) {
neo4j.connect(neo4jurl, function (err, graph) {
graph.query(query.join('\n'), {inputusername : 'andrew'} ,function (err, results) {
if (err) {
giveresults(HTTPStatus.INTERNAL_SERVER_ERROR);
}
else {
giveresults(JSON.stringify(results));
}
});
});
}
app.get('/allrelations/:username', function (req, res){
res.set({'Content-Type': 'text/json'});
username = req.params.username;
parameters = {inputusername : username};
neo4jQuery(neo4jurl, queryforallrelation, parameters, function(results){
res.send(results);
});
});
app.listen(1212);
以下是我从控制台得到的错误:
C:\node\NodejsNeo4j1-master>node neo4jtest.js
Error: Most middleware (like bodyParser) is no longer bundled with Express and must be installed separately. Please see https://github.com/senchalabs/connect#middleware.
at Function.Object.defineProperty.get (C:\node\NodejsNeo4j1-master\node_modules\express\lib\express.js:89:13)
at Object.<anonymous> (C:\node\NodejsNeo4j1-master\neo4jtest.js:26:18)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:906:3
最佳答案
编辑:我发布了布赖恩种子的一个分支，所有更改如下: https://github.com/LossyHorizon/angular-socket-io-seed
我在与自己抗争时发现了这个讨论。我正在更新我的
https://github.com/btford/angular-socket-io-seed在我开始一个新项目之前。当我弄清楚如何做时，我计划将我的更改提交回布赖恩福特。
旧包.json
"socket.io": "~0.9.16",
"jade": "~0.31.2",
"express": "~3.2.6"
新包.json
"socket.io": "1.1.*",
"jade": "1.6.*",
"express": "4.8.*",
"serve-favicon": "2",
"morgan": "1.3.*",
"method-override":"*", //added missing ,
"body-parser": "1.8",
"errorhandler": "*",
"express-session": "*",
"multer": "0.1.*"
您将需要显式添加曾经存在的中间件，一行:
var express = require('express');
变成一堆行:
var express = require('express');
var favicon = require('serve-favicon');
var logger = require('morgan');
var methodOverride = require('method-override');
var session = require('express-session');
var bodyParser = require('body-parser');
var multer = require('multer');
var errorHandler = require('errorhandler');
旧设置代码:
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.static(path.join(__dirname, 'public')));
app.use(app.router);
新的设置代码:
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(methodOverride());
app.use(session({ resave: true, saveUninitialized: true,
secret: 'uwotm8' }));
// parse application/json
app.use(bodyParser.json());
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: true }));
// parse multipart/form-data
app.use(multer());
app.use(express.static(path.join(__dirname, 'public')));
这是让我终生难忘的部分。可悲的是，一旦我解决了这个问题，我查看了 express/lib/application.js，搜索了 app.listen，并且有一个很棒的评论很好地解释了事情。不知道为什么我查找源代码的速度如此之慢，尽管看起来我并不孤单。
演示、文档、大多数博客文章都说你用这个来启动你的应用程序，它可以工作，但会阻止我们使用 socket.io(同时也是 http 和 https)。
app.listen(app.get('port'), function(){
console.log('Express server on port ' + app.get('port'));
});
这在功能上是相同的，但使 socket.io 的使用变得容易。查找 app.listen() 的源代码，您会发现无论如何它都是这样做的。
// could be/remain at top of file
var http = require('http');
var server = http.createServer (app);
// delete this line if NOT using socket.io
var io = require('socket.io').listen(server);
server.listen(app.get('port'), function(){
console.log('Express server on port ' + app.get('port'));
});
不管你是使用新的 express 'standard' 语法还是这种语法，无论哪种方式都使用相同的 http 对象，而且我记得 http 无论如何都是 node.js 的内置组件。
我希望这对其他人有帮助。
关于node.js - 错误 : Most middleware (like bodyParser) is no longer bundled with Express，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25550819/