使用HttpURLConnection发送帖子

Question

I have a node.js which waits for post with 2 parameters (name and pass):

app.post('/login.html', function (req, res) {

    log.info(req.body);
    userName = req.body.name;
    pass = req.body.pass;
    ...
}

I'm trying to send post with the 2 parameters via simple java application, but I can't see that it arrive to the node.js.

what am I missing ?

The java code:

public static void main(String[] args) {
    URL url;
    HttpURLConnection urlConnection = null;
    try {
        url = new URL("http://83.63.118.111:31011/login.html");

        urlConnection = (HttpURLConnection) url.openConnection();               
        urlConnection.setReadTimeout(10000);
        urlConnection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");

        urlConnection.setConnectTimeout(10000);
        urlConnection.setRequestMethod("POST");
        urlConnection.setDoInput(true);
        urlConnection.setDoOutput(true);

        OutputStream os = urlConnection.getOutputStream();
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));          
        String str = "name='root'&pass='123456'";
        //System.out.print(str);
        writer.write(str);
        writer.flush();
        Thread.sleep(100);
        writer.close();
        os.close();       
}           

Answer 1

Your code will close when start send data (send and stop)

You should wait it done.

Add code after writer.flush();

Example get response :

BufferedReader in = new BufferedReader(
        new InputStreamReader(urlConnection.getInputStream()));
String inputLine;
StringBuilder response = new StringBuilder();

while ((inputLine = in.readLine()) != null) {
    response.append(inputLine);
}
in.close();

or just get responseCode :

int responseCode = urlConnection.getResponseCode();

Your program wait send request success or fail.

I think you use Thread.sleep(100); to wait send request, but it stop your Thread (don't send data to server)

Your code have req.body , Express.js don't have it, need use middleware body-parser .