如何将Ajax集成到Node.js中？

Question

I have tested the Hello world program with Node.js concept and it is working fine.

File details:

index.html
socket.js

run in command prompt : node socket.js

And i have tried the ajax call in node.js using same hello world files and follow the code in the following link,

how to use jQuery ajax calls with node.js

server.js

var http = require('http');

http.createServer(function (req, res) {
    console.log('request received');
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('_testcb(\'{"message": "Hello world!"}\')');
}).listen(8080);

index.html

<script src="/socket.io/socket.io.js"></script>
<script>
  $(document).ready(function() {
    $.ajax({
        url: 'http://localhost:8080/',
        dataType: "jsonp",
        jsonpCallback: "_testcb",
        cache: false,
        timeout: 5000,
        success: function(data) {
            $("#test").append(data);
        },
        error: function(jqXHR, textStatus, errorThrown) {
            alert('error ' + textStatus + " " + errorThrown);
        }
    });
});

</script>
<div id="test"></div>

And i run with the following method in the command prompt

node node.js

And run in the browser like,

http://localhost:8080

Then, It provides the following output

_testcb('{"message": "Hello world!"}')

But i cant get the proper result, Please explain me, how to integrate the ajax in node.js with sample code?

Thanks for your help.

Answer 1

更改您的writeHead函数以输出JSON而不是纯文本：

res.writeHead(200, {'Content-Type': 'application/json'});

Answer 2

Note that success and error are deprecated in jQuery. Use .then and similar promise/defered-related methods instead.

Also, use express NPM library instead of plain node.js web server - it does most of this work on sending and receiving JSON on server for you.

Answer 3

I have tried to implement simple AJAX in nodeJS and this is the link: nodesamples

Hope it helps :)