Make use of the finfo() functions. A simple illustration: <?php $finfo = finfo_open(FILEINFO_MIME_TYPE); echo finfo_file($finfo, “path/to/image_dir/image.gif”); finfo_close($finfo); OUTPUT : image/gif Note : Windows users must include the bundled php_fileinfo.dll DLL file in php.ini to enable this extension.
for anyone else facing this issues, I had this problem and had removed my mime.types include http { include mime.types; … server { listen: 80 … }
http://www.iana.org/assignments/media-types/ lists the “official” mime-types, but it doesn’t prevent anyone making their own an not registering it with IANA.
PHP curl_getinfo() <?php # the request $ch = curl_init(‘http://www.google.com’); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_exec($ch); # get the content type echo curl_getinfo($ch, CURLINFO_CONTENT_TYPE); # output text/html; charset=ISO-8859-1 ?> curl curl -I http://www.google.com output HTTP/1.1 301 Moved Permanently Location: http://www.google.com/ Content-Type: text/html; charset=UTF-8 Date: Fri, 09 Apr 2010 20:35:12 GMT Expires: Sun, 09 May 2010 20:35:12 GMT Cache-Control: … Read more
In the image.onload event listener, check whether image.width and image.height are both zero (preferably image.naturalWidth and image.naturalHeight, when they are supported). If the width and height are both zero, the image is considered invalid. Demo: http://jsfiddle.net/RbNeG/ // Usage: loadImage(‘notexist.png’); function loadImage(src) { var image = new Image; image.onload = function() { if (‘naturalHeight’ in this) … Read more
I’ve not seen any sort of comprehensive list yet for Firefox but I have managed to find something (via a post on the MediaRecorder API from Google’s web updates section) that links to this test set that seems to shed some light on things. Essentially, it looks like the following are (at time of writing) … Read more
There is a ruby binding to libmagic that does what you need. It is available as a gem named ruby-filemagic: gem install ruby-filemagic Require libmagic-dev. The documentation seems a little thin, but this should get you started: $ irb irb(main):001:0> require ‘filemagic’ => true irb(main):002:0> fm = FileMagic.new => #<FileMagic:0x7fd4afb0> irb(main):003:0> fm.file(‘foo.zip’) => “Zip archive … Read more
An image with an empty “src” attribute generates this error under Windows-Chrome: <img src=””> … whereas … <img> … does not. I arrived here because my ajax resultset was returning “src” data which was empty yet the img was still being inserted into the page.
You can use application/octet-stream for unknown types. RFC 2046 states in section 4.5.1: The “octet-stream” subtype is used to indicate that a body contains arbitrary binary data.
Use file. Examples: > file –mime-type image.png image.png: image/png > file -b –mime-type image.png image/png > file -i FILE_NAME image.png: image/png; charset=binary