訪問(wèn)node服務(wù)器跨域，post請(qǐng)求變成了options,設(shè)置請(qǐng)求頭后，獲取不到post請(qǐng)求提交的數(shù)據(jù)var http = require('http');var url = require("url");http.createServer(function (req, res) {    var urlObj = url.parse(req.url);    var pathname = urlObj.pathname;    // 關(guān)閉nodejs 默認(rèn)訪問(wèn) favicon.ico    if (!pathname.indexOf('/favicon.ico')) {        return;     };     let requestM=req.method;    res.writeHeader(200,{        "access-control-allow-origin": "*",        "access-control-allow-methods": "GET, POST, PUT, DELETE, OPTIONS",        "access-control-allow-headers": "Content-Type,Content-Length, Authorization, Accept,X-Requested-With",        "access-control-max-age": 10,        "Content-Type": "application/json"    });    if(requestM==="POST"){        var post = '';                  // 通過(guò)req的data事件監(jiān)聽(tīng)函數(shù)，每當(dāng)接受到請(qǐng)求體的數(shù)據(jù)，就累加到post變量中                req.on('data', function(chunk){                        post += chunk;                });    }    //獲取不到post 請(qǐng)求過(guò)來(lái)的參數(shù)}).listen(3000);