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URI handlers

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sayaleepote

What is URI Handlers? Relationship between URI, URL and URN, Various URI handlers, Server-Side Includes (SSI), CGI/FastCGI, Server-side scripting, Servlets, JSP.

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URI HANDLERS 1 - SERVER-SIDE TECHNOLOGIES By : Sayalee Pote
What is a URI? 2 U - Uniform R - Resource I - Identifier “A URI is a string of characters used to identify a name of a web resource.” Example: http://en.wikipedia.org/wiki/Web_engineering
Relationship between URI, URL and URN.  Uniform Resource Name (URN)  Uniform Resource Locator (URL) URL: file:///home/username/books/RomeoAndJuliet.pdf URN:isbn:0-486-27557-4 3
URI Handlers 4 ACCEPT REQUEST EXECUTION RETURN RESULT
Various URI handlers: Server-Side Includes (SSI) CGI/FastCGI Server-side Scripting Servlets Java Server Pages (JSP) ASP.NET 5
Server-Side Includes (SSI)  Directives that are placed in HTML pages.  Evaluated on the server while the pages are being served.  They let you add dynamically generated content to an existing HTML page.  Special file extension : shtml  Syntax: <!--#element attribute=value attribute=value ... -->  Example: <!--#echo var="DATE_LOCAL" --> 6
SSI supports the following commands: include <!--#include virtual="/cgi-bin/counter.pl" --> //outputs the results of a CGI program exec <!--#exec cmd="dir" --> //gives you a directory listing 7
CGI/FastCGI 8  CGI stands for Common Gateway Interface.  Standardized interface between Web servers and application programs.  Use of Form tags of HTML. READ PARAMETERS PROCESS THEM CREATE AN OUTPUT AS HTML DOCUMENT
Server-side scripting  Introduces Active Server Pages (ASP)  All URI handlers mentioned here define a script language.  Executed by a script interpreter.  HTML files saved with an extension .asp  Not limited to one single scripting language. 9
Servlets  Enhancement of CGI technology in Java  Invoked by special URLs to process incoming requests.  Multi-Threading capabilities.  Offer session tracking. 10
JSP  Dynamically generated web pages  Released by Sun microsystems  Similar to PHP  Deployment of JSP 11
WHY USE JSP?? vs ASP vs Pure Servlets vs JavaScript vs Static HTML 12
JSP MODEL 13
SAMPLE CODE  <!DOCTYPE html>  <html>  <body>  <p>Click the button to get a time-based greeting.</p>  <button onclick="myFunction()">Try it</button>  <p id="demo"></p>  <script>  function myFunction()  {var x="";  var time=new Date().getHours();  if (time<20)  {x="Good day";  }  else  {x="Good evening";  }  document.getElementById("demo").innerHTML=x;  }  </script>  </body>  </html> 14
OUTPUT 15
ASP.NET  Static web pages  Next generation of ASPs.  ASP.NET is a valuable tool for programmers  Use of .NET languages is allowed besides script languages  Visual Studio  Server side  Eg: Amazon.com,eBay.com 16
OVERVIEW Object Oriented Programming Page gets compiled into an intermediate language Intermediate code is converted to machine code Machine code is eventually run on the processor 17
18 THANK YOU!

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URI handlers

  • 1. URI HANDLERS 1 - SERVER-SIDE TECHNOLOGIES By : Sayalee Pote
  • 2. What is a URI? 2 U - Uniform R - Resource I - Identifier “A URI is a string of characters used to identify a name of a web resource.” Example: http://en.wikipedia.org/wiki/Web_engineering
  • 3. Relationship between URI, URL and URN.  Uniform Resource Name (URN)  Uniform Resource Locator (URL) URL: file:///home/username/books/RomeoAndJuliet.pdf URN:isbn:0-486-27557-4 3
  • 4. URI Handlers 4 ACCEPT REQUEST EXECUTION RETURN RESULT
  • 5. Various URI handlers: Server-Side Includes (SSI) CGI/FastCGI Server-side Scripting Servlets Java Server Pages (JSP) ASP.NET 5
  • 6. Server-Side Includes (SSI)  Directives that are placed in HTML pages.  Evaluated on the server while the pages are being served.  They let you add dynamically generated content to an existing HTML page.  Special file extension : shtml  Syntax: <!--#element attribute=value attribute=value ... -->  Example: <!--#echo var="DATE_LOCAL" --> 6
  • 7. SSI supports the following commands: include <!--#include virtual="/cgi-bin/counter.pl" --> //outputs the results of a CGI program exec <!--#exec cmd="dir" --> //gives you a directory listing 7
  • 8. CGI/FastCGI 8  CGI stands for Common Gateway Interface.  Standardized interface between Web servers and application programs.  Use of Form tags of HTML. READ PARAMETERS PROCESS THEM CREATE AN OUTPUT AS HTML DOCUMENT
  • 9. Server-side scripting  Introduces Active Server Pages (ASP)  All URI handlers mentioned here define a script language.  Executed by a script interpreter.  HTML files saved with an extension .asp  Not limited to one single scripting language. 9
  • 10. Servlets  Enhancement of CGI technology in Java  Invoked by special URLs to process incoming requests.  Multi-Threading capabilities.  Offer session tracking. 10
  • 11. JSP  Dynamically generated web pages  Released by Sun microsystems  Similar to PHP  Deployment of JSP 11
  • 12. WHY USE JSP?? vs ASP vs Pure Servlets vs JavaScript vs Static HTML 12
  • 14. SAMPLE CODE  <!DOCTYPE html>  <html>  <body>  <p>Click the button to get a time-based greeting.</p>  <button onclick="myFunction()">Try it</button>  <p id="demo"></p>  <script>  function myFunction()  {var x="";  var time=new Date().getHours();  if (time<20)  {x="Good day";  }  else  {x="Good evening";  }  document.getElementById("demo").innerHTML=x;  }  </script>  </body>  </html> 14
  • 16. ASP.NET  Static web pages  Next generation of ASPs.  ASP.NET is a valuable tool for programmers  Use of .NET languages is allowed besides script languages  Visual Studio  Server side  Eg: Amazon.com,eBay.com 16
  • 17. OVERVIEW Object Oriented Programming Page gets compiled into an intermediate language Intermediate code is converted to machine code Machine code is eventually run on the processor 17