# File lib/fastimage.rb, line 146 def initialize(uri, options={}) @property = options[:type_only] ? :type : :size @timeout = options[:timeout] || DefaultTimeout @uri = uri if uri.respond_to?(:read) fetch_using_read(uri) else begin @parsed_uri = URI.parse(uri) rescue URI::InvalidURIError fetch_using_open_uri else if @parsed_uri.scheme == "http" || @parsed_uri.scheme == "https" fetch_using_http else fetch_using_open_uri end end end raise SizeNotFound if options[:raise_on_failure] && @property == :size && !@size rescue Timeout::Error, SocketError, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ECONNRESET, ImageFetchFailure, Net::HTTPBadResponse, EOFError, Errno::ENOENT raise ImageFetchFailure if options[:raise_on_failure] rescue NoMethodError # 1.8.7p248 can raise this due to a net/http bug raise ImageFetchFailure if options[:raise_on_failure] rescue UnknownImageType raise UnknownImageType if options[:raise_on_failure] end
Returns an array containing the width and height of the image. It will return nil if the image could not be fetched, or if the image type was not recognised.
By default there is a timeout of 2 seconds for opening and reading from a remote server. This can be changed by passing a :timeout => number_of_seconds in the options.
If you wish FastImage to raise if it cannot size the image for any reason, then pass :raise_on_failure => true in the options.
FastImage knows about GIF, JPEG, BMP and PNG files.
![[+]](./images/find.png "show/hide quicksearch"){kind=small}
require 'fastimage'
FastImage.size("http://stephensykes.com/images/ss.com_x.gif")
=> [266, 56]
FastImage.size("http://stephensykes.com/images/pngimage")
=> [16, 16]
FastImage.size("http://farm4.static.flickr.com/3023/3047236863_9dce98b836.jpg")
=> [500, 375]
FastImage.size("http://www-ece.rice.edu/~wakin/images/lena512.bmp")
=> [512, 512]
FastImage.size("test/fixtures/test.jpg")
=> [882, 470]
FastImage.size("http://pennysmalls.com/does_not_exist")
=> nil
FastImage.size("http://pennysmalls.com/does_not_exist", :raise_on_failure=>true)
=> raises FastImage::ImageFetchFailure
FastImage.size("http://stephensykes.com/favicon.ico", :raise_on_failure=>true)
=> raises FastImage::UnknownImageType
FastImage.size("http://stephensykes.com/favicon.ico", :raise_on_failure=>true, :timeout=>0.01)
=> raises FastImage::ImageFetchFailure
FastImage.size("http://stephensykes.com/images/faulty.jpg", :raise_on_failure=>true)
=> raises FastImage::SizeNotFound
Overrides the default timeout of 2 seconds. Applies both to reading from and opening the http connection.
If set to true causes an exception to be raised if the image size cannot be found for any reason.
# File lib/fastimage.rb, line 104 def self.size(uri, options={}) new(uri, options).size end
Returns an symbol indicating the image type fetched from a uri. It will return nil if the image could not be fetched, or if the image type was not recognised.
By default there is a timeout of 2 seconds for opening and reading from a remote server. This can be changed by passing a :timeout => number_of_seconds in the options.
If you wish FastImage to raise if it cannot find the type of the image for any reason, then pass :raise_on_failure => true in the options.
require 'fastimage'
FastImage.type("http://stephensykes.com/images/ss.com_x.gif")
=> :gif
FastImage.type("http://stephensykes.com/images/pngimage")
=> :png
FastImage.type("http://farm4.static.flickr.com/3023/3047236863_9dce98b836.jpg")
=> :jpeg
FastImage.type("http://www-ece.rice.edu/~wakin/images/lena512.bmp")
=> :bmp
FastImage.type("test/fixtures/test.jpg")
=> :jpeg
FastImage.type("http://pennysmalls.com/does_not_exist")
=> nil
File.open("/some/local/file.gif", "r") {|io| FastImage.type(io)}
=> :gif
Overrides the default timeout of 2 seconds. Applies both to reading from and opening the http connection.
If set to true causes an exception to be raised if the image type cannot be found for any reason.
# File lib/fastimage.rb, line 142 def self.type(uri, options={}) new(uri, options.merge(:type_only=>true)).type end
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