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CFIMAGE Part 4: Remote Images
The Coldfusion 8 CFIMAGE tag allows you to work with remote images simply by providing a URL to the desired Image, this makes grabbing images from places such a flickr (which I use as an online backup of most of my images) easily.
<cfimage source="http://farm1.static.flickr.com/97/232021390_ad47422845_o.jpg" name="MyImage"/>
<cfimage source="#MyImage#" action="writeToBrowser"/>
This works just fine, even for really large images of 1368x2048. You can also manipulate your remote image in various ways there is one thing, however, you should be aware of when working with remote images.
Small Gotcha
I managed create a runtime error when trying to read the EXIF or IPTC meta data from the remote image.
Exception occured in JPG processing. segment size would extend beyond file stream length
This only occurred on big images, I tried with a fewer smaller images and CF had not problems.
Happy Coding...
Many Flickr photos associate Creative Commons licenses with particular images, and I believe that the Flickr API for developers allows you to restrict the results to images that are so licensed. The developer should make sure that the image usage complies with the requirements of the particular license on a photo, such as the Creative Commons 2.5 Non-Commercial, Attribution, Share-Alike which permits reproduction of the image so long as the purpose is not commercial, that the author is given proper credit, and that any reproductions bear the same license.
Important stuff!
Yes very important, thanks for posting that! It's definitely important to respect the copyright holder of the image.
I only used flickr as an example to illustrate the ability to use remote images and in no way would condone the improper use copyrighted images!
As I mentioned in my post I no only use flickr to show off my images to friends (and strangers alike) I also use it as off-site storage.
Use the <cfhttp> tag to retrieve the image and write it to the hard-drive. Then you can read in the image using the <cfimage> tag and get the EXIF data normally using the imageGetEXIFMetaData function. Do not use the <cfimage> tag to get the image and write it to disk as it loses the EXIF meta data.