how to separate the response div ids in ajax call - javascript

Please help me out to resolve the issue.
function createRequestObject(){
var req;
if(window.XMLHttpRequest){
//For Firefox, Safari, Opera
req = new XMLHttpRequest();
}
else if(window.ActiveXObject){
//For IE 5+
req = new ActiveXObject("Microsoft.XMLHTTP");
}
else{
//Error for an old browser
}
return req;
}
var http = createRequestObject();
function empajax(method,nameId)
{
url='college/cat/employee.jsp'+"?nameId="+nameId;
if(method == 'POST'){
http.open(method,url,true);
http.onreadystatechange = handleResponse;
http.send(null);
}
}
function handleResponse(){
if(http.readyState == 4 && http.status == 200){
var response = http.responseText;
if(response){
$("#empname").html(response);
$("#empnumber").html(response);
}
}
}
In the above ajax function, employee.jsp is returing below values in below divs. How to separate the div responses in the habdleResponse() function to set the values in corresponding divs like (empname,empnumber)
<div>
<b>ram</b>
</div>
<div>
<b>1234</b>
</div>
I just wan to set the employee name in the empname div and employee number in the empnumber div.
Thanks in advance!

You need to traverse your XML dom:
function handleResponse(){
if(http.readyState == 4 && http.status == 200){
var xmlResponse = xmlHttp.responseXML;
root = xmlResponse.documentElement;
names = root.getElementsByTagName("empname");
numbs = root.getElementsByTagName("empnum");
for (var i = 0 ; i < numbs.length; i++) {
throw(names[i].firstChild.data, numbs[i].firstChild.data);
}
Then just pass over the variables to a function that will throw them in the document:
function throw(name , number) {
var divider = document.createElement('div') ;
divider.innerHTML = "<div class='name'>" + name + " </div> <div class='numb'>" + number +"</div>"
document.appendChild(divider);
}
And then you'll have it. A separate div for each of your entry.

Related

Function output empty by succesfull AJAX response

There's an issue with my function in the AJAX.
I create an AJAX call to a PHP file that returns JSON.
For loop this JSON I created a fucntion that I run if the AJAX is successfull.
But in practice the data is empty.
<script>
document.getElementById("getproducts").addEventListener("submit", sendAjax);
function sendAjax(event) {
var q = document.getElementById('search').value;
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
display(this.responseText);
}
}
xhttp.open("POST", "results.php", true);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send('search='+q);
event.preventDefault();
}
function display( jsdata ){
for ( var key in jsdata ){
var htmltabel = '';
var datanode = document.createElement("div");
htmltabel += '<div class="id">' + jsdata[key]['id'] + '</div>';
content = htmltabel;
datanode.innerHTML = content;
document.getElementById("resultt").appendChild(datanode);
}
}
</script>
If I code the JSON hardcode in the function like this than everything is okay.
var hardcoded = {"1736":{"id":"1736","post_title":"Test explode","_sku":"12345","_stock":null,"_price":"9.50"}}
//PART OF THE CODE
if (this.readyState == 4 && this.status == 200) {
display(hardcoded);
}
How can I fix this that the function use the responded JSON?
here is a corrected script, You should just convert the responseData from string to Json Object!
document.getElementById("getproducts").addEventListener("submit", sendAjax);
function sendAjax(event) {
var q = document.getElementById('search').value;
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
display( JSON.parse(this.responseText) ); // You should convert the response from string to a valid JSON
}
}
xhttp.open("POST", "results.php", true);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send('search='+q);
event.preventDefault();
}
function display( jsdata ){
for ( var key in jsdata ){
var htmltabel = '';
var datanode = document.createElement("div");
htmltabel += '<div class="id">' + jsdata[key]['id'] + '</div>';
content = htmltabel;
datanode.innerHTML = content;
document.getElementById("resultt").appendChild(datanode);
}
}

How to get multiple XMLHttpRequests to occur serially?

I have the following code, which works (sort of). When I run it, the page displays information about the two coins, but returns 'undefined' for the coin price. The call to alert() indicates that the getCoinPrice function is running AFTER the main code. How do you execute the code so that the function call happens serially? If that's not possible, would it be better to learn to use the Fetch API?
Here's the code, in its entirety:
<html>
<body>
<h2>Use the XMLHttpRequest to get the content of a file.</h2>
<p id="demo"></p>
<script>
function getCoinPrice(id) {
var xhr = new XMLHttpRequest();
var URL = "https://api.coinmarketcap.com/v2/ticker/" + id + "/";
xhr.onreadystatechange = function() {
if (xhr.readyState == 4 && xhr.status == 200) {
var Obj = JSON.parse(xhr.responseText);
var price = Obj.data.quotes.USD.price;
alert(price);
return(price);
}
}
xhr.open("GET", URL, true);
xhr.send();
}
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var myObj = JSON.parse(this.responseText);
var coins = [ "BTC","ETH" ]
for(j=0; j < coins.length; j++) {
for(i=0; i < myObj.data.length; i++) {
if (myObj.data[i].symbol == coins[j]) {
document.getElementById("demo").innerHTML +=
myObj.data[i].id + "," + myObj.data[i].name + "," +
myObj.data[i].symbol + "," +
getCoinPrice( myObj.data[i].id ) + "<br>" ;
}
}
}
}
};
xmlhttp.open("GET", "https://api.coinmarketcap.com/v2/listings/", true);
xmlhttp.send();
</script>
</body>
</html>

How to chain ajax calls using plain javascript

I've looked for the answers but couldn't find anything with plain Javascript. What would be the appropriate way? I tried to use the same approach repetitively but it didn't work. How can I solve this with pure Javascript?
function someFunction(){
var url = "someUrl";
var xmlhttp = new XMLHttpRequest ();
xmlhttp.open("GET", url, true);
xmlhttp.send();
xmlhttp.onreadystatechange = function (){
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
obj = JSON.parse(xmlhttp.responseText);
length = obj.ajax.length;
for(var i = 0; i < length; i++ ){
try{
var someVar = obj.ajax.elements[i].id;
var url2 = "someOtherUrl"+someVar+"/features";
var xmlhttp = new XMLHttpRequest ();
xmlhttp.open("GET", url, true);
xmlhttp.send();
xmlhttp.onreadystatechange = function (){
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
obj2 = JSON.parse(xmlhttp.responseText);
length2 = obj2.ajax.length;
for(var j= 0; j < length2; j++){
var elementNames = obj2.elements[j].name;
}
}
}
}
}
}
You can call that someFunction() recursively. To do so, You just have to invoke that same function after 200 ok response.
In following code I've added a restriction to return form recursive callback stack after a fixed amount of requests in chain.
EDIT : for multiple urls
callDone = 0;
urls = ['http://url1','http://url2','http://url3'];
totalCall = urls.length - 1;
function someFunction(){
//Edit: > Fetch url from array
var url = urls[ callDone ] ;
var xmlhttp = new XMLHttpRequest ();
xmlhttp .open( "GET", url, true);
xmlhttp .send();
xmlhttp .onreadystatechange = function ()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
//your stuff with response...
if( callDone < totalCall ){
callDone++;
someFunction();
}
else{
return;
}
}
}
}

Calling AJAX function after another one

I have something I cannot understand how to do it in AJAX. I have a sidebar and a div "content" in my page. The sidebar is made of button and onclick it call the classical function:
function loadDoc(url) {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
document.getElementById("content").innerHTML = xhttp.responseText;
}
};
xhttp.open("GET", url, true);
xhttp.send();
}
It load the "url" of the button in the content. Well, at this point everything is ok. Now one of this url, say "TheUrl", is a document that contain title and so on, and a div "list" and in this list I would like to load an XML file. I have the function
function loadXML() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
myFunction(xhttp);
}
};
xhttp.open("GET", "file.xml", true);
xhttp.send();
}
function myFunction(xml) {
var i;
var xmlDoc = xml.responseXML;
var table="<ul>";
var x = xmlDoc.getElementsByTagName("ITEM");
for (i = 0; i <x.length; i++) {
table += "<li>" +
x[i].getElementsByTagName("ELEMENT")[0].childNodes[0].nodeValue +
"</li>"
};
table += "</ul>";
document.getElementById("list").innerHTML = table;
}
But I have no idea how to load the function loadXML() after loadDoc("TheUrl") so that the Xml data appears in the div list that was create in the div content... I am clear ?? :D
I would like something like that in my sidebar:
<ul>
<li><button type="button" onclick=loadDoc("OtherUrl.html")>OtherUrl</button></li>
<li><button type="button" onclick=loadDoc("TheUrl.html").done(loadXML())>TheUrl</button></li>
</ul>
Thanks you in advance for your kind help.
You can just call the loadXML function in the onreadystaechange event of the first AJAX call like so:
xhttp.onreadystatechange = function() {
if (xhttp.readyState == 4 && xhttp.status == 200) {
document.getElementById("content").innerHTML = xhttp.responseText;
// call the other function
loadXML();
}

How to print xmlhttp response?

I am getting some information from database, this information is getting back into JSON format now I need to print this JSON information. But my code is not working getCountryDetails.php is php file for interacting with the database. Following code is the script, When I click the button It intersects with database.
<script type="text/javascript">
$(document).ready(function() {
$("#quickSearch").click(function(){
var countries = [];
$.each($("#select-choice-1 option:selected"), function(){
countries.push($(this).val());
});
if (countries == "") {
document.getElementById("txtHint").innerHTML = "";
return;
} else {
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) {
//myFunction(xmlhttp.responseText);
myFunction(xmlhttp.responseText);
}
}
document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
xmlhttp.open("GET","webservices/getCountryDetails.php?q="+countries,true);
xmlhttp.send();
}
});
});
function myFunction(response) {
var arr = JSON.parse(response);
var i;
var out = "<table>";
for(i = 0; i < arr.length; i++) {
out += "<tr><td>" +
arr[i].Name +
"</td><td>" +
arr[i].City +
"</td><td>" +
arr[i].Country +
"</td></tr>";
}
out += "</table>"
document.getElementById("id01").innerHTML = out;
}
</script>
Firstly, countries will never be an empty string, you've defined it as an array
var countries = [];
...
if (countries == "") { // always fail
secondly, you can't concantenate an array into a string, and XMLHttpRequest doesn't accept arrays
xmlhttp.open("GET","webservices/getCountryDetails.php?q=" + countries, true);
Thirdly, you seem to be using jQuery, so why not use it as it does accept an array
$.ajax({
url : 'webservices/getCountryDetails.php',
data : countries
}).done(myFunction);

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