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In what situations would AJAX long/short polling be preferred over HTML5 WebSockets?
...d, due to timeouts or data eof. On server side it is still treated like an HTTP request, same as AJAX, except the answer on request will happen now or some time in the future, defined by the application logic.
support chart (full) | wikipedia
WebSockets - client ↔ server. Create a TCP connection ...
Extension · App Inventor 2 中文网
...权时默认申请的 scope。默认值是 basic,netdisk。
UserAgent
HTTP 请求默认使用的 User-Agent。
Events
AccessTokenChanged(token)
当 AccessToken 属性通过解析授权回调被更新时触发。
ApiError(operation,httpStatus,message,responseBody)...
How to add images in select list?
... iconselect.js; Icon/image select (combobox, dropdown)
Demo and download; http://bug7a.github.io/iconselect.js/
HTML usage;
<div id="my-icon-select"></div>
Javascript usage;
var iconSelect;
window.onload = function(){
iconSelect = new IconSelect("my-icon-select"...
Force IE compatibility mode off using tags
...
There is the "edge" mode.
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>My Web Page</title>
</head>
<body>
<p>Content goes here.</p>
</body>
</html>
From the linked M...
Send a file via HTTP POST with C#
...
Using .NET 4.5 (or .NET 4.0 by adding the Microsoft.Net.Http package from NuGet) there is an easier way to simulate form requests. Here is an example:
private async Task<System.IO.Stream> Upload(string actionUrl, string paramString, Stream paramFileStream, byte [] paramFile...
Detect if Android device has Internet connection
...an active Internet connection is to try and connect
to a known server via http.
public static boolean hasActiveInternetConnection(Context context) {
if (isNetworkAvailable(context)) {
try {
HttpURLConnection urlc = (HttpURLConnection) (new URL("http://www.google.com").openC...
Can scrapy be used to scrape dynamic content from websites that are using AJAX?
...m Mozilla Firefox (or an equivalent tool in other browsers) to analyze the HTTP request that generate the messages on the web page:
It doesn't reload the whole page but only the parts of the page that contain messages. For this purpose I click an arbitrary number of page on the bottom:
And I o...
How do I force a DIV block to extend to the bottom of a page even if it has no content?
...ave to mess around with it a bit.
This site has some excellent examples:
http://www.brunildo.org/test/html_body_0.html
http://www.brunildo.org/test/html_body_11b.html
http://www.brunildo.org/test/index.html
I also recommend going to http://quirksmode.org/
...
Medium-size Clojure sample application?
...trieving gaka/gaka/0.1.0/gaka-0.1.0.pom from clojars Tried to use insecure HTTP repository without TLS. This is almost certainly a mistake; however in rare cases where it's intentional please see lein help faq for details.Tried to use insecure HTTP repository without TLS. This is almost certainly a ...
PHP Session Security
...is, don't send details such as username in the cookie.
Check the $_SERVER['HTTP_USER_AGENT']. This adds a small barrier to session hijacking. You can also check the IP address. But this causes problems for users that have changing IP address due to load balancing on multiple internet connections etc...