Cross Domain Ajax and JSONP


  • Same Origin Policy 
  • JSONP (JSON with Padding) 
  • Cross Origin Resource Sharing (CORS)

Same Origin Policy

What is Same Origin Policy? 

  • The same origin policy prevents a script loaded from one origin from accessing a document from another origin 
    • In other words, it does not allow cross-domain access 
  • JavaScript codes are considered from the same origin only if they are loaded from the sites that have the same 
    • protocol 
    • port 
    • host 
  • The same origin policy is imposed by browsers


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