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PHP 利用AJAX获取网页并输出的实现代码(Zjmainstay)

　　本文标签：AJAX,获取网页

看点：
1、file_get_contents超时控制 。
2、页面编码判断 。
3、键盘Enter键捕捉响应 。
4、键盘event兼容处理 。//event = event || window.event;
5、XMLHttpRequest 和 jQuery 两种实现方案 。
6、页面及源码同时展示 。
XMLHttpRequest版本 get_web.php
复制代码 代码如下:

<?php
header("Content-type: text/html; charset=utf-8");
if(!empty($_POST[input_text])) {
ini_set(default_socket_timeout, 10);
if(!$data = file_get_contents($_POST[input_text])) {
echo "Time out!";
return ;
}
$charset_pos = stripos($data,charset);
if($charset_pos) {
if(stripos($data,utf-8,$charset_pos)) {
echo iconv(utf-8,utf-8,$data);
}else if(stripos($data,gb2312,$charset_pos)) {
echo iconv(gb2312,utf-8,$data);
}else if(stripos($data,gbk,$charset_pos)) {
echo iconv(gbk,utf-8,$data);
}
return;
}
echo $data;
}else {
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Get Web Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="zh-CN" />
<script type="text/javascript">
function createXMLHTTP()
{
try
{
var request = new XMLHttpRequest();
}
catch(e1)
{
var arrVersions = ["Microsoft.XMLHTTP","MSXML2.XMLHttp.4.0",
"MSXML2.XMLHttp.3.0","MSXML2.XMLHttp.5.0"];
for(var i=0;i < arrVersions.length;i++){
try{
request = new ActiveXObject(arrVersions[i]);
}catch(e2){
request = false;
}
}
}
return request;
}
function ajax_post(url, params, target_id)
{
request = new createXMLHTTP();
request.onreadystatechange = function() {
if (this.readyState == 4)
if (this.status == 200)
if (this.responseText != null)
document.getElementById(target_id).innerHTML = this.responseText;
}
request.open("POST", url, true);
request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
request.setRequestHeader("Content-length", params.length);
request.setRequestHeader("Connection", "close");
request.send(params);
}
var checked = false;
function check_(value) {
checked = value;
}
function get_key(event) {
event = event || window.event;
if(event.keyCode==13 && checked != false)
{
var url = document.getElementById(input_text).value;
if(url != ) {
get_page();
}else {
document.getElementById(input_text).onfocus();
return false;
}
}
}
function get_page() {
var url = document.getElementById(input_text).value;
if(!url) {
return false;
}else {
if(document.getElementById(output_page).innerHTML != ) {
document.getElementById(output_page).innerHTML = ;
}
}
if(url.indexOf(http://) == -1) {
url = http://+url;
}
ajax_post(
<?php echo $_SERVER[PHP_SELF]; ?>,
input_text=+url,
output_page
);
document.getElementById(click_show).style.display = block;
document.getElementById(back_a).href = document.location.href;
document.getElementById(origin_website).href = url;
}
</script>
<style>
.div_box{
margin-top:10px;
}
.input_box{
border:1px solid;
margin-left:10px;
margin-top:2px;
height:15px;
float:left;
size:32
font-size: 14px;
}
.button_box{
float:left;
height:23px;
padding-bottom:3px;
}
.hide_box{
display:none;
}
.a_box{
margin-left:10px;
margin-top:3px;
height:15px;
float:left;
font-size: 14px;
}
.clear_box{
height:50px;
}
</style>
</head>
<body onkeydown="get_key(event)">
<div class="div_box">
<input id="input_text" class="input_box" type="text" value="" onclick="check_(true)" onblur="check_(false)"></input>
<input type="button" class="button_box" onclick="get_page()" value="Get it!" ></input>
<div id="click_show" class="hide_box">
<a id="origin_website" class="a_box" href="#" target="_black">访问原站</a>
<a id="back_a" class="a_box" href="#">后退</a>
</div>
</div>
<div class="clear_box"></div>
<div id="output_page"></div>
</body>
</html>
<?php
}
//End_php

jQuery 版本 get_web.php
复制代码 代码如下:

<?php
header("Content-type: text/html; charset=utf-8");
if(!empty($_POST[input_text])) {
ini_set(default_socket_timeout, 10);
if(!$data = file_get_contents($_POST[input_text])) {
echo "Time out!";
return ;
}
$charset_pos = stripos($data,charset);
if($charset_pos) {
if(stripos($data,utf-8,$charset_pos)) {
echo iconv(utf-8,utf-8,$data);
}else if(stripos($data,gb2312,$charset_pos)) {
echo iconv(gb2312,utf-8,$data);
}else if(stripos($data,gbk,$charset_pos)) {
echo iconv(gbk,utf-8,$data);
}
return;
}
echo $data;
}else {
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Get Web Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="zh-CN" />
<script type="text/javascript" src="http://files.cnblogs.com/Zjmainstay/jquery-1.6.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(document).keyup(function(e){
e = e || window.event;
if(e.keyCode == 13 && $("#input_text").val() != ) {
$(".button_box").click();
}
});
$(".button_box").click(function(){
if($("#input_text").val() == ) {
$("#input_text").addClass(errorTips).focus();
return false;
}else {
$("#input_text").removeClass(errorTips);
}
$.ajax({
url: <?php echo $_SERVER[PHP_SELF] ?>,
data: input_text=+$("#input_text").val(),
type:POST,
success:function(msg){
$(".html_tips").show();
$("#origin_website").attr(href,$("#input_text").val());
$("#back_a").attr(href,document.location.href);
$("#click_show").show();
$("#output_page_html").empty().val(msg).css({height:parseInt($(document).height()-100)}).show();
$("#output_page").empty().html(msg).show();
}
});
});
});
</script>
<style>
.div_box{
margin-top:10px;
}
.input_box{
border:1px solid;
margin-left:10px;
margin-top:2px;
height:15px;
float:left;
size:32
font-size: 14px;
}
.button_box{
float:left;
height:23px;
padding-bottom:3px;
}
.hide_box{
display:none;
}
.a_box{
margin-left:10px;
margin-top:3px;
height:15px;
float:left;
font-size: 14px;
}
.clear_box{
height:50px;
}
.error_tips{
border:1px solid red;
}
#output_page_html{
width:960px;
margin:0 auto;
}
.html_tips{
float: left;
margin: 0 21px;
font-size:1.8em;
}
</style>
</head>
<body>
<div class="div_box">
<input id="input_text" class="input_box" type="text" value=""></input>
<input type="button" class="button_box" value="Get it!" ></input>
<div id="click_show" class="hide_box">
<a id="origin_website" class="a_box" href="#" target="_black">访问原站</a>
<a id="back_a" class="a_box" href="#">后退</a>
</div>
</div>
<div class="clear_box"></div>
<div class="html_tips hide_box">站点</div>
<div id="output_page"></div>
<div class="html_tips hide_box">站点源码</div>
<textarea id="output_page_html" class="hide_box"></textarea>
</body>
</html>
<?php
}
//End_php

作者：Zjmainstay