doGet(),doPost() , doPut(),doHead()

• Get append the data to the URL as name value pair.
• Post sends the data separately in the body of the request 
• Get is for small amount of data 
• Get requests can be bookmarked 
• Get is used for simple html requests 
• In Post request the query limit is unlimited 
• User seen the data in the URL in Get request, can be a security issue. Post requests the data is hidden.
• Get request is always ascii. Post can be both ascii and binary.
• Post is used for posting long messages 
• Put() is uploading the file to the server. But many container it wont work and Post is used instead.
• Get request can be triggered by clicking on a link ,Typing address ,location.href and submitting a page with method ="get" in the form element.
• Post is triggered when submitting an html form.
• head() returns same header that Get return .But nobody or content 
• Receives and return small amount of message faster and light weight.