我目前正在教我自己更多關於服務器代碼,特別是使用Node.js和Express,並且我有很多接收和解析的麻煩從POST請求發送的JSON對象。我看了很多其他的帖子(鏈接到下面),我無法弄清楚我的生活出了什麼問題。以下是我已經看了:試圖解析JSON對象從POST請求在Express v4使用身體分析器
的Javascript:發送JSON對象與AJAX Javascript : Send JSON Object with Ajax? 如何消耗JSON POST數據的快速應用 How do I consume the JSON POST data in an Express application 使用XMLHttpRequest的 Send POST data using XMLHttpRequest 發送POST數據如何提取POST Node.js中的數據? How do you extract POST data in Node.js?
所有這些都讓我走上了正軌,但我不是那裏,因此尋求幫助。這裏是我正在使用的代碼:
發送POST請求
var button = document.querySelector("#button");
button.onclick = function(){
console.log("Getting data from local server");
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://localhost:3000/data/test.json", true);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.send(JSON.stringify({"latitude": 41.2418, "longitude": -70.8898}));
};
處理POST請求在服務器
var http = require("http");
var fs = require("fs");
var express = require("express");
var app = express();
var path = require("path");
var bodyParser = require("body-parser");
var port = process.env.PORT || 3000;
//tells express where to find all the static files (HTML, CSS, etc) and load them into the browser
app.use(express.static(path.join(__dirname, '../client')));
//tells the application to use body-parser as middleware so it can handle post requests
app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());
//routing methods
//deal with incoming GET and POST requests to the server
app.get("/", function(req, res){
res.send("Submitted GET Request");
})
//only handles incoming POST requests to the test.json resource
app.post("/data/test.json", function(req, res){
console.info("Submitting POST Request to Server");
console.info("Request body: " + req.body);
//write the file
fs.writeFile(__dirname + "/../client/data/test.json", req.body,
function(err){
if(err){
console.error(err); //print out the error in case there is one
return res.status(500).json(err);
}
//resolve the request with the client
console.info("updated test.json");
res.send();
});
})
//tell the express object to create the server and listen on the port
app.listen(port);
console.log("Listening on localhost:" + port);
每當我試着打印出「REQ的內容.body「我得到了」[object Object]「的輸出。有任何想法嗎?編號: 我的問題已解決。我已經改變
console.info("Request body: " + req.body);
要
console.info("Request body: " + JSON.stringify(req.body));
我也改變了我的Content-Type在我的崗位XMLHttpRequest來 「應用/ JSON」,以幫助格式。
呃...您的內容類型不匹配您的數據... ??? –
試試這個JSON.stringify(req.body); – VivekN
[對象對象]意味着你想要打印的變量不是字符串,只需使用JSON.stringify(req.body); –