我在服务器上构建了一些rest API,从其他域调用它们,Get请求工作正常,但我在调用POST请求时面临一个问题。
我无法在服务器上接收客户端发送的数据。
服务器代码:
var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
//var fn = require('fn')
var app = express();
var allowCrossDomain = function(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With');
// intercept OPTIONS method
if ('OPTIONS' === req.method) {
res.send(200);
}
else {
next();
}
};
// all environments
app.set('port', process.env.PORT || 3000);
app.use(allowCrossDomain);
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.post('/user', user.saveUser);
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
exports.saveUser = function(req, res) {
var key = req.body.key; //fb,twitter,web
var userData = req.body.userData;
var result = checkUser(userData,key);
}
发出请求的客户端代码:
var data = { key: 'web', userData: userData }
$.ajax({
method: "POST",
//contentType: 'application/json',
url: "www.acbd.com/user",
//url:"http://prayable-21641.onmodulus.net/user",
data: data,
crossDomain: true,
dataType: "json"
}).success(function (data, textstatus) {
// this callback will be called asynchronously
// when the response is available
console.log(data)
console.log(textstatus)
}).error(function (data, textstatus) {
console.log(data)
console.log(textstatus)
// called asynchronously if an error occurs
// or server returns response with an error status.
});
我无法在服务器上获得key或userData,它说它们没有定义:
TypeError: Cannot read property 'key' of undefined
您忘记要求和使用body-parser中间件模块了。
还有,为什么内容类型被注释掉了?你需要它
服务端代码应该是这样的:
var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
//var fn = require('fn')
//requiring body-parser
var bodyParser = require('body-parser');
var app = express();
var allowCrossDomain = function(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With');
// intercept OPTIONS method
if ('OPTIONS' === req.method) {
res.send(200);
}
else {
next();
}
};
// all environments
app.set('port', process.env.PORT || 3000);
app.use(allowCrossDomain);
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
// using body-parser
app.use(bodyParser());
app.post('/user', user.saveUser);
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
还有,别忘了NPM安装:
npm install body-parser
//需要正文解析器,确保使用
安装它npm install body-parser
var bodyParser = require('body-parser');
,然后使用
app.use (bodyParser.json ());
app.use (bodyParser.urlencoded ());
希望有帮助