Yes, but think carefully first: How are your readers going to know that their "submit" has succeeded? They may hit 'submit' many times! The correct solution according to the HTTP specification is to return HTTP status code 204. As an... Read More

CGI and JAVA are fundamentally different, and for most applications are NOT interchangable. CGI is a protocol for running programs on a WWW server. Whilst JAVA can also be used for that, and even has a standardised API (the servlet, which is... Read More

The Common Gateway Interface, or CGI, is a standard for external gateway programs to interface with information servers such as HTTP servers. A plain HTML document that the Web daemon retrieves is static, which means it exists in a constant state:... Read More

APIs are proprietary programming interfaces supported by particular platforms. By using an API, you lose all portability. If you know your application will only ever run on one platform (OS and HTTPD), and it has a suitable API, go ahead and use... Read More

Yes. Period. There is a lot you can do to minimise these. Read More

It depends on which version of the question you asked. Yes, we can use CGI to trigger the browser's standard Username/Password dialogue. Send a response code 401, together with a "WWW-authenticate" header including details of the the... Read More

CGI scripts are run by the HTTPD, and therefore by the UID of the HTTPD process, which is (by convention) usually a special user "nobody". There are two basic ways to run a script under your own userid: (1) The direct approach: use a setuid... Read More

(1) Several CGI programming libraries offer powerful interactive debugging facilities. These include: - for Perl, Lincoln Stein's CGI.pm (now part of the standard Perl distribution) - for Tcl, Don Libes' cgi.tcl http://expect... Read More

Object Oriented means programme will be their in terms of Class and Object relationship will be their. * Structured Oriented Means programme will be their in terms of multiple Functions. Read More

The distinction is semantic. Traditionally, compiled executables (binaries) are called programs, and interpreted programs are usually called scripts. In the context of CGI, the distinction has become even more blurred than before. The words are... Read More

There are innumerable caveats to this answer, but basically any Webpage containing a form will require a CGI script or program to process the form inputs. Read More

No - you can use any programming language you please. Perl is simply today's most popular choice for CGI applications. Some other widely- used languages are C, C++, TCL, BASIC and - for simple tasks - even shell scripts. Read More

If you're already a programmer,CGI is extremely straightforward, and just three resources should get you up to speed in the time it takes to read them: 1) Installation notes for your HTTPD.Is it configured to run CGI scripts, and if so how does... Read More

The most usual (but browser-dependent) way to do this is to set a cookie. If you do this, you are accepting that not all users will have a 'session'. An alternative is to pass a session ID in every GET URL, and in hidden fields of POST... Read More

For permanent and simple redirection, use the HTTPD configuration file: it's much more efficient than doing it yourself. Some servers enable you to do this using a file in your own directory (eg Apache) whereas others use a single... Read More

At First,in the CGI code, at it's start, add "sleep(30);". This will cause the CGI to do nothing for thiry seconds (you may need to adjust this time). Compile the CGI with debuging info ("-g" in gcc) and install the CGI as normal. Next, using... Read More

The distinction is semantic.Traditionally, compiled executables(binaries) are called programs, and interpreted programs are usually called scripts.In the context of CGI,the distinction has become even more blurred than before.The words are often... Read More

No, but it helps. The Web, along with the Internet itself, C, Perl, and almost every other Good Thing in the last 20 years of computing, originated in Unix. At the time of writing, this is still the most mature and best-supported platform for Web... Read More