Develop Reference

HTTPRequest ajax error with slesh in end of Uri in codeigniter

Help guest...
i make web using framework Codeigniter and also using ajax XMLHttp Request to load some data from DB.
if i open the link Like this
localhost/web/topsales
every things is OK like this. Images
but if i add slash in end of url
localhost/web/topsales/
the result is error. Ajax load and duplicate the pages view like this image
i use AJAX XMLHttp Request for load the data:
function showdata()
{
var idunit = document.getElementById('idunit').value;
var month = document.getElementById('month').value;
var year = document.getElementById('year').value;
var xmlhttp;
document.getElementById("result").innerHTML = "<div class='text-center'>Loading...</div>"; //xmlhttp.responseText
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("result").innerHTML = xmlhttp.responseText; //xmlhttp.responseText
}
}
xmlhttp.open("POST","showresult",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("idunit="+idunit+"&month="+month+"&year="+year);
}
please i need help, thanks so much for some advice.

save url responce into variable with javascript / html

in a webpage i would like to collect a response from another web server at a given URL address.
let's say someone else has a server at http://mysite/123 that responds with a simple string. (without headers and stuff).
what is the most SIMPLE way to get javascript on my webpage to collect a url's raw response in preferably a byte array variable? though i would except an answer that saves in string to get me going. this is an exact copy paste from my html document and its not working for me.
thanks!
<script>
var txt = "";
txt=httpGet("https://www.google.com");
alert(txt.length.toString());
function httpGet(theUrl) {
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
return xmlhttp.responseText;
}
}
xmlhttp.open("GET", theUrl, false);
xmlhttp.send();
}
</script>

So I'd have to say your best bet would be to look into making an HTTP (or XHR) request from javascript.
check: Return HTML content as a string, given URL. Javascript Function
function httpGet(theUrl)
{
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
return xmlhttp.responseText;
}
}
xmlhttp.open("GET", theUrl, false );
xmlhttp.send();
}

Error incorrect function in XMLHttpRequest.open() method

I done a ajax call to local http server but I got error in xmlhttp.open("GET", "http://localhost//push", true); incorrect function in IE 11, Below is my full code:
var xmlhttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
....some code.....
}}
}
xmlhttp.open("GET", "http://localhost//push", true);
xmlhttp.send();
}
IE uses new XMLHttpRequest();

Finally i got the answer very silly issue, In chrome URL can be "http://localhost//push" but in IE it should have backslash instead of forward slash "http:\\localhost\\push" or else it will show incorrect function

How to make Ajax send JSON to PHP script

I am working on a webpage that needs to store data on the server in a .json file.
Here is what I have tried so far:
Javascript code:
// variable j = our json
var j;
function loadDoc(){
var xmlhttp;
if (window.XMLHttpRequest){// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
j = xmlhttp.responseText;
}
}
xmlhttp.open("GET","things.json",true);
xmlhttp.send();
}
loadDoc();
function rewrite(){
var xhr;
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
xhr = new XMLHttpRequest();
} else if (window.ActiveXObject) { // IE 8 and older
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
xhr.onreadystatechange = function(){
if(xhr.readyState == 4){
};
};
xhr.open("POST", "write.php", true);
xhr.send("data=" + j);
};
The PHP file:
<?php
$data = $_POST['data'];
file_put_contents('things.json', $data);
?>
Note, in other parts of my code the j variable is changed.
My problem is that after the PHP script is making the JSON file blank. Am I doing anything wrong? Is php receiving the JSON properly? If so, how can I fix that?
Cheers!
If you vote down, please tell me why.

To POST data like an HTML form, add an HTTP header with setRequestHeader(). (w3school page)
so it must be :
xmlhttp.setRequestHeader("Content-type","application/json");

how to read xml file with many nodes with javascript

i have an RegistrationResponseMessages.xml:
<messages>
<error>
<code id="501">Couldn't retrieve the HTML document because of server-configuration problems.</code>
<code id="502">Server busy, site may have moved ,or you lost your dial-up Internet connection.</code>
</error>
<success></success>
</messages>
trying to read contents of code id 501 and 502 with javascript, but it not works.
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET", "RegistrationResponseMessages.xml", false);
xmlhttp.send();
xmlDoc = xmlhttp.responseXML;
document.getElementById("errorCode403").innerHTML = getElementsByTagName(501)[0].childNodes[0].nodeValue);
displaying it here:
<label id="errorCode403" style="font-weight: 600; color: red;">give some error</label>
what is my problem?

It's ajax, you have to wait for the data to be returned, then you have to access it the right way:
var xmlhttp;
if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
} else {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onload = function() {
var xmlDoc = this.responseXML,
value = xmlDoc.getElementsByTagName('501')[0].childNodes[0].nodeValue;
document.getElementById("errorCode403").innerHTML = value;
}
xmlhttp.open("GET", "RegistrationResponseMessages.xml", false);
xmlhttp.send();
Not sure about the traversal in the XML, as 501 sounds like a strange tagName ?
EDIT:
to get a list of the ID's you do this inside the onload handler:
xmlhttp.onload = function() {
var xmlDoc = this.responseXML,
var codes = xmlDoc.getElementsByTagName('code');
var array = [];
for (var i=0; i<codes.length; i++) {
array.push( codes[i].id );
}
console.log(array);
}