Java Network Programming, Part 1: URLs, URLConnections, and InetAddresses

• Java Network Programming, Part 1: URLs, URLConnections, and InetAddresses
• Please turn off all
• We will learn how Java handles
• I assume you
• Applet Network Security Restrictions
• Some Background
• Hosts
• Internet addresses
• Domain Name System (DNS)
• The InetAddress Class
• Creating InetAddresses
• The getByName() factory method
• Other ways to create InetAddress objects
• Getter Methods
• Utility Methods
• Ports
• Protocols
• IETF RFCs
• W3C Standards
• W3C Standards
• URLs
• Example URLs
• The Pieces of a URL
• The java.net.URL class
• Content and Protocol Handlers
• Finding Protocol Handlers
• Supported Protocols
• URL Constructors
• Constructing URL Objects
• Constructing URL Objects in Pieces
• Including the Port
• Relative URLs
• Constructing Relative URLs
• Parsing URLs
• For example,
• Parsing URLs
• Missing Pieces
• Reading Data from a URL
• Webcat
• The Bug in readLine()
• Webcat
• CGI
• Normal web surfing uses these two steps:
• Forms
• CGI
• GET and POST
• HTTP
• A Typical HTTP Connection
• What the client sends to the server
• MIME
• Browser Request MIME Header
• Server Response MIME Header
• Query Strings
• URL Encoding
• For example,
• The URLEncoder class
• For example,
• Example
• The URLDecoder class
• GET URLs
• URLConnections
• URLConnections vs. URLs
• URLConnection six steps:
• I/O Across a URLConnection
• For example,
• Reading Header Data
• getHeaderFieldKey()
• For example
• getHeaderFieldInt() and getHeaderFieldDate()
• Example
• Six Convenience Methods
• Example
• Writing data to a URLConnection
• Eight Steps:
• POST CGIs
• A POST request includes
• Example
• Details
• HttpURLConnection
• Recall
• Response Codes
• HTTP Protocols
• getRequestMethod()
• disconnect()
• For example,
• usingProxy
• Redirect Instructions
• Example
• Example
• Following Redirects
• To Learn More
• Questions?

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