错误：大多数中间件（如bodyParser）不再与Express捆绑在一起 [英] Error: Most middleware (like bodyParser) is no longer bundled with Express

问题描述

我需要创建一个Web服务，我在服务器中使用Node.js。但是当我在本地主机中运行时，我收到一个错误：

I need to create a web service and I am using Node.js in server. But when I am running in localhost I am getting an error:

错误：大多数中间件（如bodyParser）不再与Express和必须单独安装。请参阅 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

推荐答案

您需要替换旧的捆绑中间件使用（ express.bodyParser ， express.methodOverride ， express.errorHandler ）与外部/单独的中间件。错误中的链接为您提供了这些新中间件的名称。您可能需要检查这些中间件的文档，以检查Express 3之后的任何API更改。

You need to replace your old bundled middleware usage (express.bodyParser, express.methodOverride, express.errorHandler) with external/separate middleware. The link in the error gives you the names of these new middleware. You may want to check the documentation for these middleware to check for any API changes since Express 3.

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