新手求指导

我用Express尝试写个小网站,但是每到要获取post数据的时候,就一直卡着.get请求时正常的,求指导怎么回事.

router.post('/text',function(req,res){
    var postData = "";
    var pathname = url.parse(req.url).pathname;
    console.log("Request for " + pathname + " received.");

    req.setEncoding("utf8");

    req.addListener("data", function(postDataChunk) {
        postData += postDataChunk;
        console.log("Received POST data chunk '"+
            postDataChunk + "'.");
    });
    req.addListener("end",function(){
        console.log("OK");
    });
});

当进入data方法的时候就不会继续了,代码应该没错吧,求指导.