Building the Realtime User Experience: Creating Immersive by Ted Roden

By Ted Roden

The net is more and more taking place in realtime. With web content reminiscent of fb and Twitter best the best way, clients are coming to count on that every one websites may still serve content material because it happens -- on smartphones in addition to desktops. This ebook exhibits you the way to construct realtime consumer studies via including chat, streaming content material, and together with extra beneficial properties in your web site one piece at a time, with out making enormous alterations to the prevailing infrastructure. You'll additionally how you can serve realtime content material past the browser.

during the ebook are many sensible JavaScript and Python examples so you might use in your website now. And within the ultimate bankruptcy, you'll construct a location-aware video game that mixes all the applied sciences mentioned.
* Use the newest realtime syndication know-how, together with PubSubHubbub
* construct dynamic widgets in your homepage to teach realtime updates from numerous resources
* the way to use lengthy polling to "push" content material out of your server to browsers
* Create an program utilizing the twister net server that is sensible of big quantities of streaming content material
* comprehend the original standards for developing a simple chat carrier
* Use IM and SMS to permit clients to engage along with your web site outdoors of an internet browser
* enforce customized analytics to degree engagement in realtime

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Since we’re going to be calling this method over and over again, we only want to grab tweets that we have not yet seen. To make this easier, Twitter provides a parameter called since_id. When supplied, Twitter will respond only with tweets that have been created since the specified id. catchTweets method. While we wait, we run setTimeout in order to run this same method again. This will create a loop that runs as long as the page is loaded. This method will keep running and calling itself over and over again.

PHP provides json_decode and json_encode, two of the most useful functions in the language for dealing with web services and data exchange on the Internet. If you’re not familiar with them, you should seriously consider giving them a look. 18 | Chapter 2: Realtime Syndication Once we have the main SUP feed, we need to load the SUP-IDs that we know about from the feeds table in our local database. This is the SUP data that we inserted in our previous script. \n"); else echo("Checking " . count($feeds_to_check) .

First, it will use Twitter’s API to find the trending topics on Twitter. Trending topics are keywords that are currently very active in tweets on Twitter. Then, we’ll create a realtime feed of tweets that contain any of those keywords. So if “realtime” is a trending topic, this widget will display any tweet containing the word “realtime” as it comes in. 39 HTML Since there is no server-side part to this example, you can put the files wherever it makes sense in your setup. We’ll be creating two files total: one HTML file and a JavaScript file.

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