如何在节点js中使用参数为application / x-www-form-urlencoded类型的POST调用

Question

I have a rest call,where it requires one parameter empid to be passed of type

 application/x-www-form-urlencoded

Iam trying to consume that using the following code.But the value is getting passed as undefined to the restcall

 function searchEmployee(employeeid){
        var empEndpoint = 'http://localhost:3001/searchemp';
        var http = new XMLHttpRequest();
        http.open('POST',empEndpoint,true);
        http.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
        var empid = employeeid;
        http.send(empid) ;
    }

Please can someone point out the mistake and help me how to POST that in proper format.

***Edit added server code

app.post('/searchemp',function(req,res){
   reqbody = req.body.empid;
   console.log(reqbody,"reqbody");
   var empdetails =con.query('SELECT * FROM tasktable WHERE Empid =?',reqbody,
     function(err,rows){
      if(err) throw err;

       console.log('EMP Data received from Db:\n');
      res.send(rows);
});
});

Answer 1

That depends on where you call the function searchEmployee from and how you do it.

as var empid = employeeid; and employeeid is the first parameter of your function you should call searchEmployee with an appropriate parameter such as 2474 .

so your should call it like that:

 searchEmployee(2474); function searchEmployee(employeeid){ var empEndpoint = 'http://localhost:3001/searchemp'; var http = new XMLHttpRequest(); http.open('POST',empEndpoint,true); http.setRequestHeader('Content-type', 'application/x-www-form-urlencoded'); var params = `empid=${empid}`; http.send(params); } 

maybe this helps: http://www.openjs.com/articles/ajax_xmlhttp_using_post.php

 var url = "get_data.php"; var params = "lorem=ipsum&name=binny"; http.open("POST", url, true); //Send the proper header information along with the request http.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); http.setRequestHeader("Content-length", params.length); http.setRequestHeader("Connection", "close"); http.onreadystatechange = function() {//Call a function when the state changes. if(http.readyState == 4 && http.status == 200) { alert(http.responseText); } } http.send(params); 

especially this should be the way to go:

var params = "lorem=ipsum&name=binny";

your equivalent should look like this:

 var params = `empid=${empid}`; http.send(params);