How to read the page content into a string in Javascript? - javascript

I would like to retrieve the content of a link (e.g. http://pastebin.ca/raw/2314500 which is a binary image) in an AJAX request. How to read the binary string in Javascript? The following code doesn't work:
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();
}
alert(httpGet("http://pastebin.ca/raw/2314500"))

Related

Send ajax GET request if condition is met

This is my JS code. However, it only executed the last ajax request. Is there anyway to put them in If statement so that
if (main-content.html is loaded), it will execute xmlhttp.open("GET","main-content-city.php?q="+str,true)
xmlhttp.send();
elseif (child-content is loaded), execute: xmlhttp.open("GET","child-content-city.php?q="+str,true);
xmlhttp.send();
<script>
function sortResult(str)
{
if (str=="")
{
document.getElementById("result").innerHTML="";
return;
}
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.open("GET","main-content-city.php?q="+str,true);
xmlhttp.send();
xmlhttp.open("GET","child-content-city.php?q="+str,true);
xmlhttp.send();
}
</script>
My index.php file is like this and using GET method to navigate between main-content.html and child-content.html.
<?php
include('header.html');
include('main-content.html');
include('footer.html');
?>
My main-content and child-content is like this:
<div id="result">
Content displayed here
</div>
Take all the following code which will be identical for both ajax calls and make a separate function i..e
function ajaxCall (){
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;
}
}
}
Then when you call ajaxCall you simply add relevant SEND:
function whatEver(){
if (main-content.html is loaded)
{ ajaxCall();
xmlhttp.open("GET","main-content-city.php?q="+str,true);
xmlhttp.send();
}
else if (child-content is loaded)
{
ajaxCall();
xmlhttp.open("GET","child-content-city.php?q="+str,true);
xmlhttp.send();
}
}

Combine AJAX request to load new page with variables

I currently have three stored JS variables (wordChoiceOne, wordChoiceTwo, wordChoiceThree). Now that I have these stored, I want to run a function called saveUsername(). This function should do the following:
Take the jQuery variables above and pass them into PHP and load the file register-form.php into the div register-login-form
So I currently have the following AJAX request, but this only handles the reloading of the form. I've never combined jQuery with PHP before so how can I add the part in this to pass the three variables?
function saveUsername(wordChoiceOne, wordChoiceTwo, wordChoiceThree){
{
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)
{
document.getElementById("login-register-form").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","register-form.php",true);
xmlhttp.send();
}
What do I add to this to pass the three variables and convert them to PHP vars like with a $ sign?
function saveUsername(wordChoiceOne, wordChoiceTwo, wordChoiceThree){
{
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)
{
document.getElementById("login-register-form").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","register-form.php?one="+wordChoiceOne+"&two="+wordChoiceTwo+"&three="+wordChoiceThree,true);
xmlhttp.send();
}
Then PHP side, use $_GET['one'], $_GET['two'] and $_GET['three']

Reusing ajax function

I want to reuse this function but I want to change the id everytime (in this case brand), do I have to make the function all over again each time or is there another way?
This is the function:
function showUser(str)
{
if (str=="")
{
document.getElementById("brand").innerHTML="";
return;
}
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("brand").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","inc/form_rest.php?q="+str,true);
xmlhttp.send();
}
Pass in the id as a parameter of the function?
You can pass the id as parameter...
function showUser(str, id) {
if (str=="") {
document.getElementById(id).innerHTML="";
return;
}
if (window.XMLHttpRequest) {
xmlhttp=new XMLHttpRequest();
} else {
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4 && xmlhttp.status==200) {
document.getElementById(id).innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","inc/form_rest.php?q="+str,true);
xmlhttp.send();
}

Display all nodes inside a tagname with JavaScript

I'm trying to use the loadXMLDoc() JavaScript function to load data from an XML document and show it on my page's DIV when a button is clicked. So far I can't get any content in my DIV, I want to load all elements within an specific tagname.
Here's the XML:
<?xml version="1.0" encoding="UTF-8"?>
<Fruits>
<Cell>Apples</Cell>
<Cell>Bananas</Cell>
<Cell>Strawberries</Cell>
</Fruits>
<Vegetables>
<Cell>Lettuce</Cell>
<Cell>Tomatoes</Cell>
<Cell>Carrots</Cell>
</Vegetables>
Here's the JavaScript:
function fruits()
{
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)
{
xmlDoc = xmlhttp.responseXML;
document.getElementById("food").innerHTML=xmlDoc.getElementsByTagName("fruits");
}
xmlhttp.open("GET","document.xml", true);
xmlhttp.send();
}
function vegetables()
{
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)
{
xmlDoc = xmlhttp.responseXML;
document.getElementById("food").innerHTML=xmlDoc.getElementsByTagName("vegetables");
}
xmlhttp.open("GET","document.xml", true);
xmlhttp.send();
}
And here's the HTML:
<button type="button" onclick="fruits()">Fruits</button>
<button type="button" onclick="vegetables()">Vegetables</button>
<div id="food">Please select your favorite</div>
Your function fruits() is not closed properly, and your function vegetables() has ended up inside function fruits(),
the same goes for defining the function xmlhttp.onreadystatechange=function()
so these functions will not even be available until fruits() is called.
Your code should look like this:
function fruits()
{
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)
{
xmlDoc = xmlhttp.responseXML;
document.getElementById("food").innerHTML=xmlDoc.getElementsByTagName("fruits");
}
}
//something went wrong here : this code ended up in the function that was to be called when xmlhttp was done with its GET operation.
//consequently it was never called
xmlhttp.open("GET","document.xml", true);
xmlhttp.send();
} // <-- this here bracket was missing
function vegetables()
{
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)
{
xmlDoc = xmlhttp.responseXML;
document.getElementById("food").innerHTML=xmlDoc.getElementsByTagName("vegetables");
}
}
//the same thing happened here
xmlhttp.open("GET","document.xml", true);
xmlhttp.send();
}

ajax show 2 data request with onclick

hello i am still new on ajax i wanted show 2 data in different place.
here the code
<li onclick="showPost(this.value);" value="*digit*" >lala</li>
the javascript
<script>
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
function showPost(hal)
{
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("gallekanan").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","../wp-content/themes/koolfort/example.php?pal="+hal,true);
xmlhttp.send();
showJudul(hal);
}
function showJudul(hal)
{
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("eventjudul").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","../wp-content/themes/koolfort/example1.php?pal="+hal,true);
xmlhttp.send();
}
</script>
when i running the code just the showJudul running and the showPost is Aborted.
Move showJudul(hal); just after document.getElementById("gallekanan").innerHTML=xmlhttp.responseText;
Try having individual control of each function rather than calling them one within another one.. ie.. have it as
<li onclick="showPost(this.value); showJudul(this.value);" value="*digit*" >lala</li>
and
<script>
function showPost(hal)
{
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("gallekanan").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","../wp-content/themes/koolfort/example.php?pal="+hal,true);
xmlhttp.send();
}
function showJudul(hal)
{
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("eventjudul").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","../wp-content/themes/koolfort/example1.php?pal="+hal,true);
xmlhttp.send();
}
</script>
Also try using try{}catch{} where you try to initialize xmlhttp - the function might give error if there is no such object available...

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