getResponseHeader doesn't return all fields

  • Hi,
    i'm using var xhr = new XMLHttpRequest(); to do a post request, when i read the response header i don't find all the fields (i.e. Autohorization). Using the c++ classes i can read all the fields. What's the problem with js function?

  • Moderators

    you need to be more specific.

    i assume you are using QML / QQmlEngine? Or do you use QtScript?
    Whats the url you are posting to? A custom web server/service?
    Show some code please, maybe you are reading the response too early.

  • My code it's in js file and i call it from qml

    function requestRestUser(verb, endpoint, obj, cb) {
        var xhr = new XMLHttpRequest();
        xhr.onreadystatechange = function() {
            if(xhr.readyState === XMLHttpRequest.DONE) {
                if(cb) {
                    if (xhr.status == "200") {
                        console.log("header" + xhr.getAllResponseHeaders());
                        cb(true, xhr.getResponseHeader('Authorization'));
                    } else if (xhr.status == "400" || xhr.status == "401") {
                        cb(false, "");
        }, endpoint);
        xhr.setRequestHeader('Content-Type', 'application/json');
        var data = (obj)?JSON.stringify(obj):''

    I have 200 code, but the xhr.getResponseHeader('Authorization') is empty (if i do the same with c++ i got it). The remote server ia java rest server.

  • Moderators

    even though QML's XMLHttpRequest object doesn't enforce the same origin policy, it may be still related to such or similar.
    In case i am right and it's a CORS related issue you might want to try to add the following:

    xhr.setRequestHeader('Access-Control-Expose-Headers', 'Authorization');

    Can you sniff the HTTP requests and corresponding responses done with XMLHttpRequest and also with QNetworkAccessManager and post them here? For sniffing you can use a tool like Wireshark for example.

    Maybe your Java webservice doesn't like something about the request sent via XMLHttpRequest. But this should be clearly seen when comparing the Request- and Response-Headers.

  • Can be a problem https?

  • Moderators

    @niqt said in getResponseHeader doesn't return all fields:

    Can be a problem https?

    shouldn't be, since the data after all should be the same.

  • From today it's ok and i don't know why.

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