Packet Blast: Top Tech Blogs, May 13
We collect the top expert content in the infrastructure industry and fire it along the priority queue.
Using HTTP/2 Server Push with PHP
Two weeks ago CloudFlare announced that it was supporting HTTP/2 Server Push for all our customers. By simply adding a Link header to an HTTP response specifying preload CloudFlare would automatically push items to web browsers that support Server Push.
To illustrate how easy this is I create a small PHP page that uses the PHP header function to insert appropriate Link headers to push images to the web browser via CloudFlare. The web page looks like this when loaded:
There are two images loaded from the same server both of which are pushed if the web browser supports Server Push. This is achieved by inserting two Link headers in the HTTP response. The response looks like:
HTTP/1.1 200 OK
Server: nginx/1.9.15
Date: Fri, 13 May 2016 10:52:13 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Link: </images/drucken.jpg>; rel=preload; as=image
Link: </images/empire.jpg>; rel=preload; as=image
At the bottom are the two Link headers corresponding to the two images on the page with the rel=preload directive as specified in W3C preload draft.
The complete code can be found in this gist but the core of the code looks like this:
<?php
function pushImage($uri) {
header("Link: <{$uri}>; rel=preload; Continue readingResponse: Broadcom’s Secretive Behaviour
The limited about of public information available on Broadcom products is frustrating and annoying.
The post Response: Broadcom’s Secretive Behaviour appeared first on EtherealMind.
What’s the Difference Between Open-O & OSM?
One goes beyond the ETSI NFV MANO diagram.
IDG Contributor Network: Low-income neighborhoods have worse cell phone service, study finds
Poor neighborhoods in the U.S. get 15 percent less cell phone coverage than their richer counterparts, a new study has found.
This confirms the “existence of a mobile-divide in the U.S.,” say the researchers from Imperial College Business School in an abstract of their paper published in Telecommunications Policy via ScienceDirect.
“Operators install two fewer mobile antennas per tract in lower income areas for equal distributions of subscribers,” the London business school says. That’s across the board, and it includes both urban and rural areas. So, it isn’t just a rural-divide issue, the researchers say.
To read this article in full or to leave a comment, please click here
How Important Is Network Hardware?
In this episode of Network Matters with Ethan Banks, learn about the pros and cons of specialized network hardware. Ethan explains when and where custom hardware makes sense, when commoditized hardware fills the bill, and the role software plays.