A Do-It-Yourself Framework - The Diigo Meta page

• 14 Jan 16
  

  nimeshkiranverma
  • This short tutorial is meant to teach you a little about WSGI, and as an example a bit about the architecture that Paste has enabled and encourages.
  • At its simplest WSGI is an interface between web servers and web applications
  • This means that WSGI can be used not just between a web server an an application, but can be used at all levels for communication. This allows web applications to become more like libraries – well encapsulated and reusable, but still with rich reusable functionality.
  • • That’s an object that responds to requests. An application is just a callable object (like a function) that takes two arguments: environ and start_response.
     
    • The environment looks a lot like a CGI environment, with keys like REQUEST_METHOD, HTTP_HOST, etc.
     
    • The environment also has some special keys like wsgi.input (the input stream, like the body of a POST request).
     
    • start_response is a function that starts the response – you give the status and headers here.
     
    • Lastly the application returns an iterator with the body response (commonly this is just a list of strings, or just a list containing one string that is the entire body.)
     
     

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  if __name__ == '__main__':
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