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How do I implement basic “Long Polling”?
...gsrv.php
<?php
if(rand(1,3) == 1){
/* Fake an error */
header("HTTP/1.0 404 Not Found");
die();
}
/* Send a string after a random number of seconds (2-10) */
sleep(rand(2,10));
echo("Hi! Have a random number: " . rand(1,10));
?>
Note: With a real site, running this on a regular...
Difference between applicationContext.xml and spring-servlet.xml in Spring Framework
...let.
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
...
How to get domain URL and application name?
...e web application name (actually the context path) is available by calling HttpServletrequest#getContextPath() (and thus NOT getServletPath() as one suggested before). You can retrieve this in JSP by ${pageContext.request.contextPath}.
<p>The context path is: ${pageContext.request.contextPat...
“Adobe Flash Player因过期而遭到阻止”的内幕起因和解决办法 - 更多技术 ...
...断，没有办法的事。
Adobe Flash Player最新版本下载地址：https://get.adobe.com/flashplayer/?loc=cn
需要注意的是，有网友反映安装了最新版本也没有解决问题，网页Flash还是不正常。这时候我建议大家查看一下浏览器插件列表，确认一下1...
jQuery If DIV Doesn't Have Class “x”
...r it
<!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" xml:lang="en" lang="en">
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.1/jquery.min....
difference between iframe, embed and object elements
... over iframe is that object sub resources (when an <object> performs HTTP requests) are considered as passive/display in terms of Mixed content, which means it's more secure when you must have Mixed content.
Mixed content means that when you have https but your resource is from http.
Referen...
How to do a Jquery Callback after form submit?
...preventDefault method)
grab all necessary values from the form
fire off an HTTP request
handle the response to the request
First, you'll have to cancel the form submit action like so:
$("#myform").submit(function(event) {
// Cancels the form's submit action.
event.preventDefault();
});
...
How do I force files to open in the browser instead of downloading (PDF)?
...indicate to the browser that the file should be viewed in the browser, the HTTP response should include these headers:
Content-Type: application/pdf
Content-Disposition: inline; filename="filename.pdf"
To have the file downloaded rather than viewed:
Content-Type: application/pdf
Content-Disposit...
Using ZXing to create an Android barcode scanning app [duplicate]
... by step to setup zxing 3.2.1 in eclipse
Download zxing-master.zip from "https://github.com/zxing/zxing"
Unzip zxing-master.zip, Use eclipse to import "android" project in zxing-master
Download core-3.2.1.jar from "http://repo1.maven.org/maven2/com/google/zxing/core/3.2.1/"
Create "libs" folder in...
Modify Address Bar URL in AJAX App to Match Current State
...ou'd like to have a discrete URL. For example, if your page's url is:
http://example.com/
If a client side function executed this code:
// AJAX code to display the "foo" state goes here.
location.hash = 'foo';
Then, the URL displayed in the browser would be updated to:
http://example....