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CDNs (
Content Delivery Networks) are great to speed up website performances, but they are a mess when you are testing your website on your development machine.
Another problem may arise if you want to change your CDN to another one. Do yoy have to replace all URLs in all your pages?
In this article I'll show you a clever and definitive solution to
avoid hardcoding the CDN URLs in your HTML markup.
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There is a well-known bug on Internet Explorer 10 for WIndows Phone 8 that avoids responsive web sites to display correctly. The cause is that Internet Explorer 10 doesn't differentiate device width from viewport width, and thus doesn't properly apply the media queries in your favorite responsive CSS framework.
You can find many fixes on the client side, but if you're using ASP.NET, you have the chance to fix it server side with only few lines of code.
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Pubblicato il 5/19/2014
Ultimo aggiornamento 5/22/2014
Lazy loading applied to a web page is an excellent technique
when all contents aren't immediately visible and you want to speed up page
rendering.
A perfect candidate for this method are image galleries with many items, only
the first image is visible when the page loads, other images will be visible
only if the user decides to browse them.
This technique sounds great, but has a big SEO problem: search engine crawlers does not execute
scripts, they only analyze
HTML markup, so all the code that renders images dynamically is totally
ignored along with images and captions.
Here're four solutions and, as often happens, the best is the last one.
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In questo articolo vedremo come controllare con precisione la cache del
client (il browser del vostro PC ad esempio) in modo da evitare di trasmettere
dati dal server quando il client già li possiede. Il server ASP.NET già possiede
dei sistemi di caching dei dati, ad esempio per evitare di continuare ad
eseguire la stessa query nel database; ma sti dati, non sarebbe bello evitare di trasmetterli, risparmiando
il consumo di banda?
La tecnica si chiama GET condizionale ed utilizza l'HTTP
status code 304 ed è particolarmente utile quando i dati sono
generati dinamicamente lato server e cambiano durante il tempo.
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Have you changed your domain and don't want to loose your SEO
page rankings?
Do you have renamed a page and don't want to return errors to users that have
saved a bookmark?
You have to perform a 301 permanent redirect to the new
page/site.
There are plenty of methods to perform this, if you
Google the question you'll
be submerged by the answers.
Curiously the easiest method doesn't come out first.
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