request.env['HTTP_USER_AGENT']
Chrome out put is below
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.16
Safari out put is below
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1
FireFox out put is below
Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0
Opera out put is below
Opera/9.80 (Windows NT 5.1; U; en) Presto/2.8.131 Version/11.10
Internet Explorer out put is below
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727)
if request.env['HTTP_USER_AGENT'] =~ /[^(]*[^)]Chrome//
if request.env['HTTP_USER_AGENT'] =~ /[^(]*[^)]*[^t]Firefox//
def browser_detection
result = request.env['HTTP_USER_AGENT']
browser_compatible = ''
if result =~ /Safari/
unless result =~ /Chrome/
version = result.split('Version/')[1].split(' ').first.split('.').first
browser_compatible = 'Application is not functional for Safari version's '+version if version.to_i < 5
else
version = result.split('Chrome/')[1].split(' ').first.split('.').first
browser_compatible = 'Application is not functional for Chrome version's '+version if version.to_i < 10
end
elsif result =~ /Firefox/
version = result.split('Firefox/')[1].split('.').first
browser_compatible = 'Application is not functional for Firefox version's '+version if version.to_i < 5
elsif result =~ /Opera/
version = result.split('Version/')[1].split('.').first
browser_compatible = 'Application is not functional for Opera version's '+version if version.to_i < 11
elsif result =~ /MSIE/
version = result.split('MSIE')[1].split(' ').first
browser_compatible = 'Application is not functional for Microsoft Internet Explorer version's '+version if version.to_i < 9
end
return browser_compatible
end