c# - Load external images efficiency -


i know efficient way load external images website.

for example: website's url "www.mydomain.com". external image http://www.myimagedomain.com/image.jpg. common way write simple html image-tag <img src="http://www.myimagedomain.com/image.jpg" />.

the problem is, if requested image large (8000x6000 pixel) want show picture thumbnail/preview 200x200 pixel, e.g on mobile devices.

based on information wrote little ashx (c#) handler downloads requested image , resizes given weight/height parameters, this:

<img src="http://www.mydomain.com/img.ashx?imageurl=http://www.myimagedomain.com/image.jpg&w=200&h=200" />

now there problem, because httphandler downloads requested image, on-the-fly.

my new approach generate based64 string resized image , save in database once?! recommend or there way eliminated download problem? maybe know how google-image-search prevents problem?

i don't want save external images on own server...

i suggest use image resizer library, solves of need in efficient way - caching included: http://www.nuget.org/packages/imageresizer/

i think google caches image thumbnails on servers search.


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