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Networking Programming
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Web servers
Web servers web server HTTP request HTTP response (content) web client (browser)
[object Object],[object Object],Web content
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Web content
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Static and dynamic content
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],URLs
[object Object],[object Object],[object Object],URLs
[object Object],[object Object],[object Object],[object Object],[object Object],How clients and servers use URLs
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],How clients and servers use URLs
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anatomy of an HTTP transaction
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anatomy of an HTTP transaction
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anatomy of an HTTP transaction
[object Object],[object Object],Serving dynamic content client server GET /cgi-bin/env.pl HTTP/1.1
[object Object],Serving dynamic content client server env.pl fork/exec
[object Object],[object Object],Serving dynamic content client server env.pl content content
[object Object],[object Object],[object Object],Serving dynamic content
[object Object],[object Object],Serving dynamic content
Serving dynamic content client server content content request create env.pl
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Serving dynamic content
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Serving dynamic content
Serving dynamic content if ((buf = getenv("QUERY_STRING")) != NULL) { p = strchr(buf, ’&’); *p = ’’; strcpy(arg1, buf); strcpy(arg2, p+1); n1 = atoi(arg1); n2 = atoi(arg2); }
[object Object],[object Object],[object Object],[object Object],Serving dynamic content
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Some CGI environment variables
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Serving dynamic content
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Tiny Web Server
The Tiny Web Server ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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  • 23. Serving dynamic content if ((buf = getenv("QUERY_STRING")) != NULL) { p = strchr(buf, ’&’); *p = ’’; strcpy(arg1, buf); strcpy(arg2, p+1); n1 = atoi(arg1); n2 = atoi(arg2); }
  • 24.
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  • 46.