I've been testing an outgoing REST GET request (towards the other world, not towards SharePoint).

When I'm using this code in pure JavaScript/HTML it works just fine. But when using it in my SharePoint app I'm receiving a JavaScript runtime error:

NetworkError at client.send(null);

This is the code I've tried so far:

var url = "https://test.com/example/something/1";

var client = new XMLHttpRequest();

client.open("GET", url, false);

client.setRequestHeader("Content-Type", "application/json");
client.setRequestHeader("theplatform", "default");
client.setRequestHeader("Authorization", "Basic keyofsomethingvalue%");


if (client.status == 200)
    alert("The request succeeded!\n\nThe response representation was:\n\n" + client.responseText)
    alert("The request did not succeed!\n\nThe response status was: " + client.status + " " + client.statusText + ".");

Does anybody know what I did wrong?

  • This is more of a javascript question than a SharePoint one.
    – Akhoy
    Sep 3, 2015 at 13:23
  • @Akhoy well it is sharepoint related, as when I'm using this code in pure javascript/html it works just fine, but when using sharepoint - nope?
    – Dr Cox
    Sep 3, 2015 at 13:25
  • Right, didn't know that. You should mention that in your question.
    – Akhoy
    Sep 3, 2015 at 13:26

1 Answer 1


CSOM and the REST API include the WebProxy for these operations.

Query a remote service using the web proxy in SharePoint 2013

Code sample:

    url: "../_api/SP.WebProxy.invoke",
    type: "POST",
    data: JSON.stringify(
            "requestInfo": {
                "__metadata": { "type": "SP.WebRequestInfo" },
                "Url": url,
                "Method": "GET",
                "Headers": {
                    "results": [{
                        "__metadata": { "type": "SP.KeyValue" },
                        "Key": "Accept",
                        "Value": "application/json;odata=verbose",
                        "ValueType": "Edm.String"
    headers: {
        "Accept": "application/json;odata=verbose",
        "Content-Type": "application/json;odata=verbose",
        "X-RequestDigest": $("#__REQUESTDIGEST").val()
    success: successHandler,
    error: errorHandler

Note 1: You need to register the target domain as a remote endpoint in the app manifest.

Note 2: Response size must not exceed 200 Kb.

  • This works, I've just got a small problem 'Access to example.com is denied. SharePoint is currently configured to block intranet calls.', do you have any further tips? :)
    – Dr Cox
    Sep 4, 2015 at 7:04
  • Why would you say my next question was a duplicate of this question?
    – Dr Cox
    Sep 4, 2015 at 11:29
  • Now this is my next question.
    – Dr Cox
    Sep 4, 2015 at 11:49
  • Don't update your question like that. I've rolled it back to the previous state so that it matches up with the response. If you are having a problem, open a new question with the specifics. Sep 4, 2015 at 15:42
  • @EricAlexander he had actually opened a new question but it was marked as duplicate. :)
    – Akhoy
    Sep 4, 2015 at 16:12

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