CGI is an outdated technology. Servelets are much more efficient and powerful when compared to the CGI technology. Hence, Servlets are more commonly used than CGI.
Most CGI scripts are used for websites, thus CGI experts would be named website programmers. If they use CGI scripting for other purposes, however, another title may be more ideal.
CGI - Computer generated imagery
CGI (Computer Generated Imaging)In movie, video, and imaging terms, Computer Generated Imaging is the art of partially or fully developing a video, movie, or image with one or multiple computers. CGI (Computer Generated Images)In context with the above, Computer Generated Images are images, videos, or movies made from the art of Computer Generated Imaging.CGI (Common Gateway Interface)Common Gateway Interface is a standard for interfacing external applications with information servers, such as HTTP or Web servers. CGI programs may be written in any language, compiled or interpreted, that is supported by the hosting computer. The program is accessed either directly by URL, or included in an HTML page using Server-Side Includes. The output is sent to the client by the web (or other) server.Common Gateway Interfaces may not exist if a web server does not allow one (as it can pose a security risk), or if a web server allows "desktop language" scripts to be ran anywhere on the server that the client can access.
The cost of CGI equipments depends on the requirements. The hardware you will require are: desktop computers, graphic tablet and CGI software. An estimate of around $5000-10000 will provide you with good CGI equipments. If you want to start a CGI project and the cost seems to turn you back then lots of outsourcing services can handle this for you at a cheaper price.
CGI stands for common gateway interface and is a standard protocol defining the generation of webpages to a console application using webserver software. For example a cgi profarm is one implementing wiki.The user agent requests the name of an entry and the serber will retrieve the source of that entry's page and transform into an HTML thereby sending the result.
CGI Stands for Common Gateway Interface. It was one of the initial technologies used to host web applications.. They were succeeded by Servlets and other J2EE technologies
Servlets were the alternative to CGI and were released in 1997. Unlike CGI, which starts a process for each request, Servlets just spawn a new thread. Servlets had a better or rather efficient architecture which was able to handle the loads of the internet. Though Servlets were awesome when compared to CGI, they still had some issues when it came to displaying dynamic content on a web page. Thankfully, Sun released the JSP (Java Server Pages) specifications in 1998, which solved all our UI woes. JSPs enabled programmers to display dynamic HTML content that could also use Java features. The combination of JSPs and Servlets was just what the Doctor Prescribed and it just revolutionized the Web Programming industry.
Though Servlets were awesome when compared to CGI, they still had some issues when it came to displaying dynamic content on a web page. Thankfully, Sun released the JSP (Java Server Pages) specifications in 1998, which solved all our UI woes. JSPs enabled programmers to display dynamic HTML content that could also use Java features.
Servlets are modules of Java code that run in a server application (hence the name "Servlets", similar to "Applets" on the client side) to answer client requests. Servlets are not tied to a specific client-server protocol but they are most commonly used with HTTP and the word "Servlet" is often used in the meaning of "HTTP Servlet".Servlets make use of the Java standard extension classes in the packages javax.servlet (the basic Servlet framework) and javax.servlet.http (extensions of the Servlet framework for Servlets that answer HTTP requests). Since Servlets are written in the highly portable Java language and follow a standard framework, they provide a means to create sophisticated server extensions in a server and operating system independent way.Advantages of Using Servletsa. They are faster than CGI scripts because each CGI script produces an entirely new process that takes a lot of time to execute, whereas a servlet creates only a new thread.b. Servlet API is standard and available easily on the internet (like JSPs)c. Servlets have the advantages like ease of development & platform independence (like Java)d. They can access all the J2SE and J2EE APIse. Can take the full advantage & capabilities of the Java programming language
Benefits of using Servlets for developing Web Applications:Servlets are an integral part of any J2EE Web application. The key benefits of using Servlets in our web applications are:a. They are faster than CGI scripts because each CGI script produces an entirely new process that takes a lot of time to execute, whereas a servlet creates only a new thread.b. Servlet API is standard and available easily on the internet (like JSPs)c. Servlets have the advantages like ease of development & platform independence (like Java)d. They can access all the J2SE and J2EE APIse. Can take the full advantage & capabilities of the Java programming langauge
CGI(Computer-Generated-Imagery) is used for making tv shows with computer animated style.
CGI was introduced in 1993 in the NCSA web server, httpd.
Perl is the most popular language used for CGI programs.
java programming language cannot be used to write CGI scripts
History of JSP & ServletsThe Internet's original purpose was to access and copy files from one computer to another. While TCP/IP provided a highway layer, the File Transfer Protocol (FTP) specification provided a standard way to exchange those files. It defined a way of shuttling them back and forth, but said nothing about looking at the content. HyperText Markup Language (HTML) allowed us to see the documents on the Internet. FTP can transmit HTML files just as easily as HTTP can. But we use Hypertext Transfer Protocol (HTTP) to act as an FTP specifically for HTML documents because it is a stateless protocol which makes having many short connections more efficient.HTTP is the plumbing that connects the various computers. Now it is time to discuss about the fluid that flows through it "JSP & Servlets"Note: JSP & Servlets arent the only technologies that are used in J2EE applications. Struts, Hibernate, Springs etc are other technologies that are used in J2EE Web applications. But, don't worry about them because they arent in the exam.Using HTTP and HTML people were able to view/browse files and contents on a remote server. This is very useful, but people wanted live data. This is where the CGI (Common Gateway Interface) specification helped us. It helped us connect to databases and display stuff on the fly. The CGI specification was a major breakthrough in Web Application Development. The CGI standards made sure that the same CGI program worked on different Web servers.CGI became the bread and butter of web developers. It was the most common means of displaying dynamic content on the internet. Though it was good, it wasn't good enough. It was not able to handle the performance requirements of the bursting Internet users. It was literally too much for it.If you are asking me why CGI couldn't handle the load, the answer is simple. CGI spawned a separate process for every request that it receives. This design was able to sustain during off-peak hours but ate off server resources during peak loads which was eventually too much for it.With growing numbers of users of web applications, scalability became a key consideration which wasn't CGI's Middle Name and hence people started exploring other options.Many CGI derivatives came up as server-side programming solutions that implement business logic, including ASP, ColdFusion, PHP, and Perl. Java surpassed them all due to portability and its object oriented programming design.Alas, he we are, learning JSPs and Servlets that are the children of the Java Family which make our lives all the more easier in the world of Web Development.Java was conceptualized in 1991 but it wasn't in the internet programming world until 1997. Servlets were the alternative to CGI and were released in 1997. Unlike CGI, which starts a process for each request, Servlets just spawn a new thread. Servlets had a better or rather efficient architecture which was able to handle the loads of the internet.Though Servlets were awesome when compared to CGI, they still had some issues when it came to displaying dynamic content on a web page. Thankfully, Sun released the JSP (Java Server Pages) specifications in 1998, which solved all our UI woes. JSPs enabled programmers to display dynamic HTML content that could also use Java features. The combination of JSPs and Servlets was just what the Doctor Prescribed and it just revolutionized the Web Programming industry
The Internet's original purpose was to access and copy files from one computer to another. While TCP/IP provided a highway layer, the File Transfer Protocol (FTP) specification provided a standard way to exchange those files. It defined a way of shuttling them back and forth, but said nothing about looking at the content. HyperText Markup Language (HTML) allowed us to see the documents on the Internet. FTP can transmit HTML files just as easily as HTTP can. But we use Hypertext Transfer Protocol (HTTP) to act as an FTP specifically for HTML documents because it is a stateless protocol which makes having many short connections more efficient.HTTP is the plumbing that connects the various computers. Now it is time to discuss about the fluid that flows through it "JSP & Servlets"Note: JSP & Servlets arent the only technologies that are used in J2EE applications. Struts, Hibernate, Springs etc are other technologies that are used in J2EE Web applications. But, don't worry about them because they arent in the exam.Using HTTP and HTML people were able to view/browse files and contents on a remote server. This is very useful, but people wanted live data. This is where the CGI (Common Gateway Interface) specification helped us. It helped us connect to databases and display stuff on the fly. The CGI specification was a major breakthrough in Web Application Development. The CGI standards made sure that the same CGI program worked on different Web servers.CGI became the bread and butter of web developers. It was the most common means of displaying dynamic content on the internet. Though it was good, it wasn't good enough. It was not able to handle the performance requirements of the bursting Internet users. It was literally too much for it.If you are asking me why CGI couldn't handle the load, the answer is simple. CGI spawned a separate process for every request that it receives. This design was able to sustain during off-peak hours but ate off server resources during peak loads which was eventually too much for it.With growing numbers of users of web applications, scalability became a key consideration which wasn't CGI's Middle Name and hence people started exploring other options.Many CGI derivatives came up as server-side programming solutions that implement business logic, including ASP, ColdFusion, PHP, and Perl. Java surpassed them all due to portability and its object oriented programming design.Alas, he we are, learning JSPs and Servlets that are the children of the Java Family which make our lives all the more easier in the world of Web Development.Java was conceptualized in 1991 but it wasn't in the internet programming world until 1997. Servlets were the alternative to CGI and were released in 1997. Unlike CGI, which starts a process for each request, Servlets just spawn a new thread. Servlets had a better or rather efficient architecture which was able to handle the loads of the internet.Though Servlets were awesome when compared to CGI, they still had some issues when it came to displaying dynamic content on a web page. Thankfully, Sun released the JSP (Java Server Pages) specifications in 1998, which solved all our UI woes. JSPs enabled programmers to display dynamic HTML content that could also use Java features. The combination of JSPs and Servlets was just what the Doctor Prescribed and it just revolutionized the Web Programming industry.
Most CGI scripts are used for websites, thus CGI experts would be named website programmers. If they use CGI scripting for other purposes, however, another title may be more ideal.