Why the bodyParser.json was used twice?










1















I am a beginner of Node.js , I am researching the sample code as below, I do not understandard why it using the [app.use(bodyParser.json());] twice, what is the purpose of #1 and #2? thanks



 var express = require('express');
var http = require('http');
var path = require('path');
var fs = require('fs');
var mime = require('mime');

var bodyParser = require('body-parser');
var cookieParser = require('cookie-parser');
var cfenv = require('cfenv');

var vcapServices = require('vcap_services');
var appEnv = cfenv.getAppEnv();

var app = express();
app.use(cookieParser());
app.use(bodyParser.urlencoded( extended: true ));
app.use(bodyParser.json()); // #1
app.set('appName', 'watsonDemo');
app.set('port', process.env.PORT || 6003);

app.set('views', path.join(__dirname + '/HTML'));
app.engine('html', require('ejs').renderFile);
app.set('view engine', 'ejs');
app.use(express.static(__dirname + '/HTML'));
app.use(bodyParser.json()); // #2

app.use('/', require("./controller/restapi/router"));









share|improve this question






















  • Probably a mistake. Using it once is okay.

    – lomse
    Nov 14 '18 at 15:51















1















I am a beginner of Node.js , I am researching the sample code as below, I do not understandard why it using the [app.use(bodyParser.json());] twice, what is the purpose of #1 and #2? thanks



 var express = require('express');
var http = require('http');
var path = require('path');
var fs = require('fs');
var mime = require('mime');

var bodyParser = require('body-parser');
var cookieParser = require('cookie-parser');
var cfenv = require('cfenv');

var vcapServices = require('vcap_services');
var appEnv = cfenv.getAppEnv();

var app = express();
app.use(cookieParser());
app.use(bodyParser.urlencoded( extended: true ));
app.use(bodyParser.json()); // #1
app.set('appName', 'watsonDemo');
app.set('port', process.env.PORT || 6003);

app.set('views', path.join(__dirname + '/HTML'));
app.engine('html', require('ejs').renderFile);
app.set('view engine', 'ejs');
app.use(express.static(__dirname + '/HTML'));
app.use(bodyParser.json()); // #2

app.use('/', require("./controller/restapi/router"));









share|improve this question






















  • Probably a mistake. Using it once is okay.

    – lomse
    Nov 14 '18 at 15:51













1












1








1








I am a beginner of Node.js , I am researching the sample code as below, I do not understandard why it using the [app.use(bodyParser.json());] twice, what is the purpose of #1 and #2? thanks



 var express = require('express');
var http = require('http');
var path = require('path');
var fs = require('fs');
var mime = require('mime');

var bodyParser = require('body-parser');
var cookieParser = require('cookie-parser');
var cfenv = require('cfenv');

var vcapServices = require('vcap_services');
var appEnv = cfenv.getAppEnv();

var app = express();
app.use(cookieParser());
app.use(bodyParser.urlencoded( extended: true ));
app.use(bodyParser.json()); // #1
app.set('appName', 'watsonDemo');
app.set('port', process.env.PORT || 6003);

app.set('views', path.join(__dirname + '/HTML'));
app.engine('html', require('ejs').renderFile);
app.set('view engine', 'ejs');
app.use(express.static(__dirname + '/HTML'));
app.use(bodyParser.json()); // #2

app.use('/', require("./controller/restapi/router"));









share|improve this question














I am a beginner of Node.js , I am researching the sample code as below, I do not understandard why it using the [app.use(bodyParser.json());] twice, what is the purpose of #1 and #2? thanks



 var express = require('express');
var http = require('http');
var path = require('path');
var fs = require('fs');
var mime = require('mime');

var bodyParser = require('body-parser');
var cookieParser = require('cookie-parser');
var cfenv = require('cfenv');

var vcapServices = require('vcap_services');
var appEnv = cfenv.getAppEnv();

var app = express();
app.use(cookieParser());
app.use(bodyParser.urlencoded( extended: true ));
app.use(bodyParser.json()); // #1
app.set('appName', 'watsonDemo');
app.set('port', process.env.PORT || 6003);

app.set('views', path.join(__dirname + '/HTML'));
app.engine('html', require('ejs').renderFile);
app.set('view engine', 'ejs');
app.use(express.static(__dirname + '/HTML'));
app.use(bodyParser.json()); // #2

app.use('/', require("./controller/restapi/router"));






node.js body-parser






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asked Nov 14 '18 at 15:36









ocean5ocean5

62




62












  • Probably a mistake. Using it once is okay.

    – lomse
    Nov 14 '18 at 15:51

















  • Probably a mistake. Using it once is okay.

    – lomse
    Nov 14 '18 at 15:51
















Probably a mistake. Using it once is okay.

– lomse
Nov 14 '18 at 15:51





Probably a mistake. Using it once is okay.

– lomse
Nov 14 '18 at 15:51












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