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Totally untested, just forked and tweaked for discussion
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require 'addressable/uri' | |
#Accepts options[:message] and options[:allowed_protocols] | |
class UriValidator < ActiveModel::EachValidator | |
def validate_each(record, attribute, value) | |
uri = parse_uri(value) | |
if !uri | |
record.errors[attribute] << generic_failure_message | |
elsif !allowed_protocols.include?(uri.scheme) | |
record.errors[attribute] << "must begin with #{allowed_protocols_humanized}" | |
end | |
end | |
private | |
def generic_failure_message | |
options[:message] || "is an invalid URL" | |
end | |
def allowed_protocols_humanized | |
allowed_protocols.to_sentence(:two_words_connector => 'or') | |
end | |
def allowed_protocols | |
@allowed_protocols ||= ([options[:allowed_protocols]].flatten || ['http', 'https']) | |
end | |
def parse_uri | |
Addressable::URI.parse(value) | |
rescue URI::InvalidURIError | |
end | |
end |
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describe UriValidator do | |
subject do | |
Class.new do | |
include ActiveModel::Validations | |
validates_with UriValidator | |
attr_accessor :url | |
end.new | |
end | |
it "should be valid for a valid http url" do | |
subject.url = 'http://www.google.com' | |
subject.should be_valid | |
end | |
end |
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UriValidator#allowed_protocols should be: