Comment envoyer des données au serveur distant à l'aide de JavaScript

Question

Je dois envoyer des données à un serveur distant à l'aide de JavaScript.Comment puis-je faire cela?

Info de fond: Il y a une page Web à partir de laquelle j'élaisse des informations à l'aide de JS et je dois le renvoyer à un autre serveur pour le traitement.La réponse n'est pas nécessaire.Les données sont XML, que j'ai Urlencode'd.

Comment faire cela?

Modifier

Le serveur que je demande aux données ne sont pas identiques qui reçoivent les données.Juste pour clarifier.

Answer 1

One of the most common ways to do this is AJAX. Here's how you perform an AJAX post request using jQuery:

<script type="text/javascript">
  $.post('/remote-url', {xml: yourXMLString });
</script>

On the server side you process it like any other POST request. If you're using PHP it's $xml = $_POST['xml'];

The biggest limitation of AJAX is that you're only allowed to make requests to the same domain the document has been loaded from (aka cross-domain policy). There are various ways to overcome this limitation, one of the easiest one is JSONP.

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UPD. For cross-domain requests an extremely simple (though not universal) solution would be:

(new Image).src = 'http://example.com/save-xml?xml=' + escape(yourXMLString)

This will issue a GET request (which cannot exceed 2KB in Internet Explorer). If you absolutely need a POST request or support for larger request bodies you can either use an intermediate server-side script on your domain or you can post a dynamically created html form to iframe.

Answer 2

• submit a form using POST. That is working on all browsers cross domains. Have the server process the post. the form can be submitted to a hidden frame if you want to simulate AJAX
• Use Cross Domain Resource Sharing (MDC) (IE XDR)

• use a web bug (create an image, set the source to the url you want - smallish GET requests only)

  var img = new Image();
img.src="http://www.otherserver.com/getxml?xml="+encodeURIComponent(yourXML); (Oops, I see Lebedev did more or less the same in his update)

• use a proxy, i.e. have your server talk to the other server for you

Answer 3

Look into Javascript's XMLHTTPRequest method -- or start with a Google search for AJAX. There's lots of ways to do this -- including some very easy ways through JS libraries like jQuery -- but a more specific answer would require some more specifics on the specific technologies you're using.

EDIT: You can set up the AJAX request to post to a server-side script (acting as a proxy) on your own domain, and have that script turn around and post the data to your remote server.