Coldfusion 2021


ColdFusion is a commercial rapid web-application development computing platform created by J. J. Allaire in 1995. (The programming language used with that platform is also commonly called ColdFusion, though is more accurately known as CFML.) ColdFusion was originally designed to make it easier to connect simple HTML pages to a database.

One of the distinguishing features of ColdFusion is its associated scripting language, ColdFusion Markup Language (CFML). CFML compares to the scripting components of ASP, JSP, and PHP in purpose and features, but its tag syntax more closely resembles HTML, while its script syntax resembles JavaScript. ColdFusion is often used synonymously with CFML, but there are additional CFML application servers besides ColdFusion, and ColdFusion supports programming languages other than CFML, such as server-side Actionscript and embedded scripts that can be written in a JavaScript-like language known as CFScript.

Originally a product of Allaire and released on July 2, 1995, ColdFusion was developed by brothers Joseph J. Allaire and Jeremy Allaire. In 2001 Allaire was acquired by Macromedia, which in turn was acquired by Adobe Systems Inc in 2005.

ColdFusion is most often used for data-driven websites or intranets, but can also be used to generate remote services such as REST services, WebSockets, SOAP web services or Flash remoting. It is especially well-suited as the server-side technology to the client-side ajax.

ColdFusion can also handle asynchronous events such as SMS and instant messaging via its gateway interface, available in ColdFusion MX 7 Enterprise Edition.

Main features
ColdFusion provides a number of additional features out of the box. Main features include:

Simplified database access
Client and server cache management
Client-side code generation, especially for form widgets and validation
Conversion from HTML to PDF
Data retrieval from common enterprise systems such as Active Directory, LDAP, SMTP, POP, HTTP, FTP, Microsoft Exchange Server and common data formats such as RSS and Atom
File indexing and searching service based on Apache Solr
GUI administration
Server, application, client, session, and request scopes
XML parsing, querying (XPath), validation and transformation (XSLT)
Server clustering
Task scheduling
Graphing and reporting
Simplified file manipulation including raster graphics (and CAPTCHA) and zip archives (introduction of video manipulation is planned in a future release)
Simplified web service implementation (with automated WSDL generation / transparent SOAP handling for both creating and consuming services – as an example, ASP.NET[4] has no native equivalent for <CFINVOKE WEBSERVICE=”http://host/tempconf.cfc?wsdl” METHOD=”Celsius2Fahrenheit” TEMP=”#tempc#” RETURNVARIABLE=”tempf”>[5])
Other implementations of CFML offer similar or enhanced functionality, such as running in a .NET environment or image manipulation.

The engine was written in C and featured, among other things, a built-in scripting language (CFScript), plugin modules written in Java, and a syntax very similar to HTML. The equivalent to an HTML element, a ColdFusion tag begins with the letters “CF” followed by a name that is indicative of what the tag is interpreted to, in HTML. E.g. <cfoutput> to begin the output of variables or other content.

In addition to CFScript and plugins (as described), CFStudio provided a design platform with a WYSIWYG display. In addition to ColdFusion, CFStudio also supports syntax in other languages popular for backend programming, such as Perl. In addition to making backend functionality easily available to the non-programmer, (version 4.0 and forward in particular) integrated easily with the Apache Web Server and with Internet Information Services.

Other features
All versions of ColdFusion prior to 6.0 were written using Microsoft Visual C++. This meant that ColdFusion was largely limited to running on Microsoft Windows, although Allaire did successfully port ColdFusion to Sun Solaris starting with version 3.1.

The Allaire company was sold to Macromedia, then Macromedia was sold to Adobe. Earlier versions were not as robust as the versions available from version 4.0 forward.[a fact or an opinion?]

With the release of ColdFusion MX 6.0, the engine had been re-written in Java and supported its own runtime environment, which was easily replaced through its configuration options with the runtime environment from Sun. Version 6.1 included the ability to code and debug Shockwave Flash.