By Shishir Gundavaram
The area large net is greater than a spot to place up smart records and beautiful images. utilizing the typical Gateway Interface (CGI), you could provide interactive queries and serve immediate details from databases, labored up into colourful portraits. This booklet bargains a entire clarification of CGI and comparable thoughts for those that carry directly to the dream of supplying their very own details servers on the net. the writer begins firstly, explaining the price of CGI and the way it really works, then strikes speedily into the delicate information of programming. the vast majority of examples use the commonest platform (UNIX) and the most well-liked language (Perl) used for CGI programming this day. besides the fact that, the ebook additionally introduces the necessities of making CGI paintings with different structures and languages.
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Extra resources for CGI programming on the World Wide Web
A checkbox creates square buttons (or boxes) that can be toggled on or off. In the example below, it is used to create four square checkboxes. pl" METHOD="POST"> Which movies do you want to order:
Amadeus The Last Emperor Gandhi Schindler's List
If a user toggles a checkbox "on" and then submits the form, the browser uses the value "on" for that variable name.
Netscape Navigator and Microsoft Internet Explorer). 2: Netscape-Compatible Headers Header Refresh Description Client reloads specified document. Set-Cookie Client stores specified data. Useful for keeping track of data between requests. html Also, there are a couple of things you should know about header syntax: Header lines don't have to be in any special order. In general, the headers you generate from a CGI program can be output in any order you like. The header block has to end with a blank line.
We will discuss this in detail later in the chapter. On the other hand, if you are using a text browser, and you select this button, the browser will send the following data: install=Install Program The Reset button clears all the information entered by the user. Users can press Reset if they want to erase all their entries and start all over again. 1 shows how the form will look in Netscape Navigator. 1: Form with text input fields Radio Buttons and Checkboxes Radio buttons and checkboxes are typically used to present the user with several options.