How to send a request from JavaScript without base URL? (SAP GUI)

Question

EDIT taken from OP comment:

"we're using the classic SAPGui [ed: not the SAPGui for HTML]"

I'd like to send a request to a simple URL from my JavaScript, so that the base URL will NOT be added to the request URL. For example, the request should be sent to the following URL (without the base URL): SAPEVENT:SOME_TEXT?2

I used the jQuery's $.ajax function in order to implement it, but without success.

Here is a JSFiddle for it: http://jsfiddle.net/txb6tdjj/2/

The JS code:

function sendEvent(id) {
    $.ajax("SAPEVENT:SOME_TEXT?" + id);
}    
sendEvent(2);

I see the following error in the JS console:

XMLHttpRequest cannot load sapevent:SOME_TEXT?2. Cross origin requests are only supported for HTTP. (jquery-2.1.0.js:8556)

I even set the parameter crossDomain: true, but it didn't help: http://jsfiddle.net/auhx2v2v/3/

The JS code:

function sendEvent(id) {
    $.ajax({
        url: "SAPEVENT:SOME_TEXT?" + id,
        crossDomain: true
    });
}
sendEvent(2);

It ends up with the same error.

It works correct in the HTML like this: http://jsfiddle.net/1f6npcn2/2/

The HTML code which works correctly:

<FORM action="SAPEVENT:PRESS_ME">
    <A HREF="SAPEVENT:CLICK_ON_ME">Click on me to send an event!</A> 
    <INPUT TYPE="submit" VALUE="Press me to send an event!"/>
</FORM>

But I need to implement it in JavaScript, so that a request parameter can be set dynamically in the URL in JavaScript. Do you know how to implement it in JS so that the request will be sent to the URL SAPEVENT:SOME_TEXT?2 without the base URL?

Additional information about used browsers: The error is shown only in Chrome. IE and Firefox do not show an error, but they also don't send the request.

Additional information for the SAP guys: I know there is a SAP Note 191908 which states that it's impossible, but a colleague has confirmed that he has successfully tested such functionality in an HTML page which used the same code as I copied above (see the HTML code above and http://jsfiddle.net/1f6npcn2/2/). So the SAP Note is wrong. I know how I can implement this functionality in HTML, but I don't know how I can implement it in JS. That's the problem.

Answer 1

I finally implemented it in JavaScript. Thanks go to this web page. I modified the solution which was shown in this web page in order to add a link instead of a form in JavaScript. This is the working solution in JS:

var targetUrl = "SAPEVENT:SOME_TEXT?2";

function sendSapEvent(targetUrl) {
    var link = document.createElement("a");
    link.setAttribute("style", "display:none;");
    link.setAttribute("href", targetUrl);

    // Move the click function to another variable
    // so that it doesn't get overwritten.
    link._click_function_ = link.click;

    document.body.appendChild(link);
    link._click_function_();
}

sendSapEvent(targetUrl);

You can find it also in this JSFiddle: http://jsfiddle.net/708r95p0/6/

It works! It sends a request to the URL sapevent:SOME_TEXT?2

I decided to use a link instead of a form element, bacause I couldn't pass the request parameter using a form.