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56853.05

Sprawdzenie czy istnieje dany adres URL - AJAX i PHP

Skrypt sprawdza czy dany adres URL istnieje.

Listing

//index.html #############################################

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Ajax</title>
<link href="ajaxcss.css" rel="stylesheet" type="text/css">
<script type="text/javascript" src="ajaxcore.js"></script>
<script type="text/javascript" src="ajax.js"></script>
</head>
<body>
<div id="mainDiv" class="mainDiv">
<input type="text" value="Tu wpisz url do sprawdzenia..."
id="tfURL" class="myTextInput">
<input type="button" value="Sprawdź" class="myButton"
onclick="startRequest();" id="btnSprawdz">
</div>
<div id="dataDiv" class="dataDiv">
</div>
</body>
</html>

//dane.php #############################################

<?php
if(isSet($_GET["url"]) && $_GET["url"] != ""){
$url = $_GET["url"];
if($id = @fopen($url, 'r')){
echo "Podany adres jest poprawny.";
fclose($id);
}
else{
echo "Podany adres jest niepoprawny.";
}
}
else{
echo "Proszę podać url do sprawdzenia.";
}
?>

//ajaxcss.css #############################################

.mainDiv
{
color: #333333;
position: relative;
background-color: #EFEFEF;
border: 1px solid #000000;
margin: 10px 10px 10px 10px;
padding: 14px 14px 14px 14px;
width: 350px;
visibility: visible;
}

.dataDiv
{
color: #333333;
position: relative;
background-color: #ffffff;
border: 1px solid #000000;
margin: 10px 10px 10px 10px;
padding: 14px 14px 14px 14px;
width: 420px;
visibility: visible;
}

.myButton
{
font-family:helvetica,sans-serif;
font-size:84%;
font-weight:bold;
border:1px solid;
border-top-color:#696;
border-left-color:#696;
border-right-color:#363;
border-bottom-color:#363;
width:120px;
margin:5px;
}

.myTextInput
{
border:1px solid;
background-color: #F8F8F8;
border-top-color:#696;
border-left-color:#696;
border-right-color:#363;
border-bottom-color:#363;
width:70%;
}

//ajaxcore.js #############################################

function getXMLHttpRequestObject()
{
try{
return new XMLHttpRequest();
}
catch(e){
try{
return new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e){
return false;
}
}
}

function startGETRequest(url, onComplete, onEnd)
{
var XMLHttpRequestObject = getXMLHttpRequestObject();
if(XMLHttpRequestObject){
XMLHttpRequestObject.open("GET", url);
XMLHttpRequestObject.onreadystatechange = function()
{
if (XMLHttpRequestObject.readyState == 4){
if(XMLHttpRequestObject.status == 200){
var responseXML = XMLHttpRequestObject.responseXML;
var responseText = XMLHttpRequestObject.responseText;
onComplete(responseText, responseXML);
}
delete XMLHttpRequestObject;
onEnd();
}
}
XMLHttpRequestObject.send(null);
}
}

function startPOSTRequest(url, params, onComplete, onEnd)
{
var XMLHttpRequestObject = getXMLHttpRequestObject();
if(XMLHttpRequestObject){
XMLHttpRequestObject.open("POST", url);
XMLHttpRequestObject.setRequestHeader(
'Content-Type', 'application/x-www-form-urlencoded');
XMLHttpRequestObject.onreadystatechange = function()
{
if (XMLHttpRequestObject.readyState == 4){
if(XMLHttpRequestObject.status == 200){
var responseXML = XMLHttpRequestObject.responseXML;
var responseText = XMLHttpRequestObject.responseText;
onComplete(responseText, responseXML);
}
delete XMLHttpRequestObject;
onEnd();
}
}
XMLHttpRequestObject.send(params);
}
}

//ajax.js #############################################

function startRequest()
{
tfURLText = document.getElementById('tfURL').value;
var btnSprawdz = document.getElementById('btnSprawdz');
btnSprawdz.disabled = true;

url = "dane.php?url=" + tfURLText;
url = encodeURI(url);

div = document.getElementById('dataDiv');
div.innerHTML = "...";

startGETRequest(url, onComplete, onEnd);
}

function onComplete(text, xml)
{
var div = document.getElementById('dataDiv');
div.innerHTML = text;
}

function onEnd()
{
var btnSprawdz = document.getElementById('btnSprawdz');
btnSprawdz.disabled = false;
}