Why XMLHttpRequest is 500

[THEFree]

#my web servise is php

if php return a small text ，QML 's XMLHttpRequest is ok.

but return a more text, zhe JSON 's lenght is 900+.

zhe XMLHttp Request is 500

[p3c0]

@THEFree Error500 is an internal server error. AFAIK the length should not matter. Here is a small example that I tested its length is more than 900

Item {
    width: 100
    height: 100

    function getData() {
        var xmlhttp = new XMLHttpRequest();
        var url = "https://jsonplaceholder.typicode.com/photos";

        xmlhttp.onreadystatechange=function() {
            if (xmlhttp.readyState == XMLHttpRequest.DONE && xmlhttp.status == 200) {
                console.log(xmlhttp.responseText.length);
                console.log(xmlhttp.responseText);
            }
        }
        xmlhttp.open("GET", url, true);
        xmlhttp.send();
    }

    Button {
        text: "Get Data"
        onClicked: getData()
    }
}

[THEFree]

@p3c0 but im post

 var URL_Text_list = listurl;
        var UserName_Text_list = listusername;
        var PWD_Text_list = listpwd;
        console.log(URL_Text_list);
        console.log(UserName_Text_list);
        console.log(PWD_Text_list);
        var http = new XMLHttpRequest()
        var url = "http://192.16.1.33/index.php/index/Start/startReplyMessage";
        var params = "username="+PWD_Text_list+"&pwd="+UserName_Text_list + "&URL="+URL_Text_list;
        http.open("POST", url, true);

        //Send the proper header information along with the request
        http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        http.setRequestHeader("Content-length", params.length);
        http.setRequestHeader("Connection", "close");

        http.onreadystatechange = function(e) {//Call a function when the state changes.
            console.log(http.status);

            if(http.readyState == 4 && http.status == 200 ) {

                var object_Json = JSON.parse(http.responseText);

                for(var i in object_Json){

                    fruitModel.append(
                                {

                                    "name":String(object_Json[i].record_name),
                                    "cost":String(object_Json[i].body)
                                }
                                )
                }

            }
        }
        http.send(params);

[p3c0]

@THEFree

• You might get more error information on the server side
• Can you send the same info in the URL that is to say using GET instead of POST and see if the same error still persists ?

[THEFree]

@p3c0 use my chromium ，zhe php return is right

[p3c0]

@THEFree Ok. can you try to debug and try to find out more information on the server side ?