发送请求并等待响应

Question

Is it possible in JS/php to send a request to a specific URL and then wait for responses from that URL?

I don't really know how to explain this question in a better way, but what I'm trying to do is to send a request to a page that has a queue on it and I want the request to "wait" on that page and send me a response as soon as it is through the queue.

Answer 1

You can do that with AngularJS (javascript) for example.

With $http service you do :

$http.get('your_url').success(function(){
// Your code if there is a good response at your request
}).error(function(){
// Your code if you detected an error (page not found etc...)
})

Official Documentation from AngularJS : $http Service

Hope that it'll help :)

Answer 2

with Jquery you can make an Ajax request to any other server side page in following way.

$.ajax({
  method: "POST",
  url: "some.php",
  data: { name: "John", location: "Boston" }
})
  .done(function( msg ) {
    alert( "Data Saved: " + msg );
  });

With PHP you've to make an CURL call to respective server-side file

Answer 3

No it's not possible.

When understanding you well, you send a request to a backend and want to wait for response until the queued process is finished. The process can (must not) take also a long time, like 5 minutes. And here is the problem, your request on backend will be closed after some time for timeout reasons.

The right way should be,

1. you send the request to your backend and get success response on successful queued request or failure on problems queuing your request.
2. After some time you can send second request to the backend to retrieve if the process has been done. This request can be send multiple times until all user queued request has been processed.

An other possible solution would be the usage of socket.io.