在服务器端未定义req.body

本文介绍了在服务器端未定义req.body的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在开发在服务器端使用 node，express，mysql 的应用程序.我已经在server.js文件上编写了服务器API，当我尝试使用Postman访问这些API时， req.body 始终是未定义的.

I am working on app which uses node, express, mysql on server side. i have written serveral APIs on server.js file and when i am trying to access those using Postman then req.body is always undefined.

这是我的server.js配置.

this is my server.js configuration.

var express = require('express'); var mysql = require('mysql'); var cors = require('cors'); var bodyParser = require('body-parser'); var wrench = require("wrench"); var fs = require('fs'); var path = require("path"); var mkdirp = require('mkdirp'); var walk = require('walk'); var fse = require('fs-extra'); var multipart = require('connect-multiparty'); var multipartMiddleware = multipart(); var crypto = require('crypto'); app.use(cors()); app.use(bodyParser.urlencoded({limit: '50mb',extended: false})); app.use(bodyParser.json({limit: '50mb'})); var connection = mysql.createConnection({ host: 'localhost', user: 'root', password: 'pass', database: 'dbname' }); connection.connect(function(err) { if (!err) { console.log("Database is connected ... \n\n"); } else { console.log("Error connecting database ... \n\n"); } }); app.post('/urlreq', function(req, res){ console.log(req.body); } app.listen(3000, function(){ console.log("Rest Demo Listening on port 3000"); });

当我尝试在Postman中以正文形式发送邮件时，req.body在服务器端变为空.

When i am trying send something in body in Postman then req.body is coming empty on server side.

推荐答案

如果您发送的是multipart/form-data，则它不起作用，因为bodyparser无法处理这种正文类型.

If you are sending multipart/form-data, it doesn't work because bodyparser doesn't handle this body type.

在这种情况下，添加以下行即可解决此问题:

In this case adding the following line should fix it:

app.use(multipartMiddleware);

形成文档:

multipart/form-data是Web表单用于传输数据的默认编码

multipart/form-data is the default encoding a web form uses to transfer data