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affordable web hosting servlets affordable web hosting servlets What we really want is a session: a persistent state for some Web surfer. Sessions are handled with CGI::Session(documented beginning on page 504), which uses cookies but provides a higher-level abstraction. require "cgi" require "cgi/session" cgi = CGI.new("html3") sess = CGI::Session.new( cgi, "session_key" => "rubyweb",                          "session_id"  => "9650",                           "new_session" => true,                           "prefix" => "web-session.

affordable web hosting servlets ") sess["CustID"] = 123 sess["Part"] = "ABC" cgi.out{   cgi.html{     "\nHTML content here"  } } This will send a cookie to the user named ``rubyweb'' with a value of 9650. It will also create a disk file in $TMP/web-session.9650 with the key, value pairs for CustID and Part.

affordable web hosting servlets When the user returns, all you need is a parameter to indicate the session id. In this example, that would be rubyweb=9650. With that value in the parameters, you'll be able to retrieve the full set of saved session data. require "cgi" require "cgi/session" cgi = CGI.new("html3") sess = CGI::Session.

affordable web hosting servlets new( cgi, "session_key" => "rubyweb",                               "prefix" => "web-session.") cgi.out{   cgi.html{     "\nCustomer #{sess['CustID']} orders an #{sess['Part']}"   } } Embedding Ruby in HTML So far we've looked at using Ruby to create HTML output, but we can turn the problem inside out; we can actually embed Ruby in an HTML document. There are a number of packages that allow you to embed Ruby statements in some other sort of a document, especially in an HTML page.

affordable web hosting servlets

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