CGI : Java Glossary

Book referral for Core Servlets and Javaserver Pages: Advanced Technologies, Vol. 2, second edition

	recommend book⇒Core Servlets and Javaserver Pages: Advanced Technologies, Vol. 2, second edition
	by	Marty Hall, Larry Brown, Yaakov Chaikin	978-0-13-148260-9	paperback
	publisher	Prentice Hall	978-0-13-271568-3	eBook
	published	2007-12-01	B004YWAZFA	kindle
Complete text of the book available on line in pdf format.
Online bookstores carrying Core Servlets and Javaserver Pages: Advanced Technologies, Vol. 2, second edition abe books anz abe books.ca abe books.de amazon.ca amazon.de Chapters Indigo amazon.es Chapters Indigo eBooks iberlibro.com abe books.com abe books.fr amazon.com amazon.fr Barnes & Noble abe books.it Nook at Barnes & Noble amazon.it Kobo junglee.com Google play abe books.co.uk O’Reilly Safari amazon.co.uk Powells other stores
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Book referral for Essential RenderMan, second edition

	recommend book⇒Essential RenderMan, second edition
	by	Ian Stephenson	978-1-84628-344-4	paperback
	publisher	Springer	978-1-84628-800-5	eBook
	published	2007-06-26
RenderMan is the C-based tool that Pixar uses for rendering animations and special effects. Oddly B&N charges more for the eBook than for the paperback.
Online bookstores carrying Essential RenderMan, second edition abe books anz abe books.ca abe books.de amazon.ca amazon.de Chapters Indigo amazon.es Chapters Indigo eBooks iberlibro.com abe books.com abe books.fr amazon.com amazon.fr Barnes & Noble abe books.it Nook at Barnes & Noble amazon.it Kobo junglee.com Google play abe books.co.uk O’Reilly Safari amazon.co.uk Powells other stores
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Book referral for More Servlets and Java Server Pages

	recommend book⇒More Servlets and Java Server Pages
	by	Marty Hall	978-0-13-067614-6	paperback
	publisher	Pearson Education
	published	2001-12-26
Complete text of the book available on line in pdf format.
Online bookstores carrying More Servlets and Java Server Pages abe books anz abe books.ca abe books.de amazon.ca amazon.de Chapters Indigo amazon.es Chapters Indigo eBooks iberlibro.com abe books.com abe books.fr amazon.com amazon.fr Barnes & Noble abe books.it Nook at Barnes & Noble amazon.it Kobo junglee.com Google play abe books.co.uk O’Reilly Safari amazon.co.uk Powells other stores
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GET and POST are two ways to request information from a server. In GET all the request information is contained tacked onto the URL (Uniform Resource Locator) (which can thus be made part of a bookmark). In PUT it is contained in a separate trailing message. GET is idempotent, a mathematician’s word meaning gives identical results with identical input and has no side effects. Thus if you do a second identical GET, the results can be fished out of cache, without reprocessing the request. In contrast, a POST is assumed to have side effects, or to produce different results each time it is invoked. It has some lasting effect on the world, e.g. submitting a membership application. The request has to be reprocessed from scratch.

The Cyberspyder people used to make a free tool to help you understand what browsers and servers send back and forth to each other called Webbug. It lets you compose GET commands and see the results. Unfortunately, it does not let you snoop on what browsers and servers are sending to each other.

Forms

• The actionscript comes from the <form method=POST action=actionscript> It is the name of the program that will handle the request on the server.
• The referrer is the URL of the page containing the form.
• The Content-Length is the length in bytes of the parm=value list following the blank line.
• The data are encoded as parm=value&parm=value. The parm names and values are url-encoded with java.util.net.URLEncoder.encode, which converts spaces to + and special characters to %xx where xx is the hex equivalent. Neither java.net.URLEncoder.encode nor java.net.URLDecoder.decode are for encoding/decoding URLs (Uniform Resource Locators). They are for encoding/decoding application/x-www-form-urlencoded form data. Note that even POST can’t send raw binary data. It must be URL encoded. The = and & are not URL encoded, just the parameter names and their values.
• The submit button has a hidden name and value as well so the server can tell which submit button was pressed.
• Multiple select fields (where you are allowed to select any combination of choices) are sent like this &Currency=CAD&Currency=USD&Currency=EUR

When you use the GET protcol the parameters are tacked on the end of the URL, separated-by a ?.

Beware of using raw Sockets for get and put for long messages. Responses come in blocks with a length field on the front. You have to bypass these. They will show up as something like 2000 cr lf in the middle of your data.

POST and GET are not efficient ways for transmitting large volumes of binary data. For that you would set up a separate socket connection.

Computer Graphics Imaging

CGI refers to rendering mathematical descriptions of scenes into 2-D or 3-D pixels for images, video games, cartoons or movies. The art has become so good, that now most of the time it takes an expert eye to tell if a scene was done with CGI or with costumed extras on a set. The cost has come down so much, even Indie filmmakers can use CGI. They might use a software tool like Pixar’s Renderman to create their files, then rent time on a cloud of machines to render a scene for per core per hour. Virtual cameras simulate depth of field and motion blur. You can generate displacement detail on top of the basic geometry. This simplifies the 3D vector models.

Book referral for Core Web Programming, second edition

	recommend book⇒Core Web Programming, second edition
	by	Marty Hall and Gary Cornell	978-0-13-089793-0	paperback
	publisher	Prentice Hall	978-0-613-92274-6	hardcover
	published	2001-06-03
1250 pages. Also has some simple RMI examples. This is a great doorstop of a book. It has a few chapters on client-server programming in Java and a section of that is on CGI. I have looked at hundreds of Java books and found nothing that deals in depth with client side Java talking to CGI, except Marty’s book. It is really very simple and he does an excellent job of explaining it. Marty has posted all the source code examples from the book for anyone to use. These contain updates and errata fixes you don’t get on the CD-ROM that comes with the book.
Online bookstores carrying Core Web Programming, second edition abe books anz abe books.ca abe books.de amazon.ca amazon.de Chapters Indigo amazon.es Chapters Indigo eBooks iberlibro.com abe books.com abe books.fr amazon.com amazon.fr Barnes & Noble abe books.it Nook at Barnes & Noble amazon.it Kobo junglee.com Google play abe books.co.uk O’Reilly Safari amazon.co.uk Powells other stores
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